Showing papers on "Isopropyl alcohol published in 1995"
TL;DR: In this article, reduced pressure etching of thermal oxide in anhydrous HF gas with three different alcoholic solvent vapors is studied. And the etch rates are interpreted in terms of alcohol vapor pressure, HF ionization, and reaction product desorption.
Abstract: Reduced pressure etching of thermal oxide in anhydrous HF gas with three different alcoholic solvent vapors is studied. Thermal oxide etch rates as functions of temperature, pressure, time, and HF partial pressure are presented for methanol, ethanol-water azeotrope (95.6% ethanol, 4.4% water), and 2-propanol (isopropyl alcohol). The etch rates are interpreted in terms of alcohol vapor pressure, HF ionization, and reaction product desorption. The efficient desorption of reaction products compared to vapor HF/H 2 O is believed to be responsible for both the wider process window for alcoholic solvents and the alleviation of the solid residue formation problem. Among the alcoholic solvents studied, methanol has the best potential while 2-propanol can also be useful in selected applications
46 citations
TL;DR: In this article, a truly catalytic version of MPV reduction system has been developed, where p-nitrobenzaldehyde has been completely reduced at room temperature within 15 minutes using catalytic amounts of aluminium isopropoxide modified by trifluoroacetic acid and just one mole equivalent of the external hydride source.
25 citations
Patent•
05 Oct 1995
TL;DR: In this paper, a highly integrated process for concurrently producing diisopropyl ether and an isoprophyl tertiary alkyl ether has been developed, where the effluent of the first reactor is separated into an ether rich stream, a water rich stream and an alcohol rich stream.
Abstract: A highly integrated process for concurrently producing diisopropyl ether and an isopropyl tertiary alkyl ether has been developed. Optionally, high purity isopropyl alcohol may also be collected as a product. In a first reactor, propylene and water are reacted to form isopropyl alcohol, a portion of which is further reacted to form diisopropyl ether. After removing unreacted propylene, the effluent of the first reactor is separated into an ether rich stream, a water rich stream and an alcohol rich stream. The alcohol rich stream is dried to provide dry isopropyl alcohol. A portion of the dry isopropyl alcohol may be removed and collected as a product. A portion of the dry isopropyl alcohol and isobutylene, isoamylene or a mixture thereof are reacted to form an isopropyl tertiary alkyl ether in a second reactor. Unreacted iso-olefins and inert compounds are then removed from the second reactor effluent. A mixture of the effluent from the second reactor and the ether rich and the water rich streams separated from the first reactor are water washed to produce a mixed ethers product stream and an aqueous isopropyl alcohol recycle stream. The isopropyl tertiary alkyl ether is collected along with the diisopropyl ether in the mixed ethers product stream from the water wash. A modified flowscheme of the process is also discussed.
19 citations
Patent•
09 May 1995
TL;DR: In this article, the solvent formulations used in thinning oil-based resins and in cleaning equipment contaminated with oil based resins include mixtures of constituents with low-, or no-toxicity and flash points generally considered to be above flammability levels.
Abstract: Solvent formulations used in thinning oil-based resins and in cleaning equipment contaminated with oil-based resins include mixtures of constituents with low-, or no-toxicity and flash points generally considered to be above flammability levels. The formulations are compatible with such resins and further have drying characteristics suitable for most users. The solvating power and drying characteristics of these formulations are equivalent to turpentine and mineral spirits, but without the safety concerns associated with those thinners. The formulation components of the present invention include propylene glycol ethers comprising no more than 60% by weight of the solvent mixture, no more than 10% by weight of an isoalkane compound, and no more than 30% by weight of an oxidizing oil, and no more than 30% by weight of an odor-masking compound, preferably d-limonene. Further optional constituents include no more than 15% by weight of propylene glycol, no more than 20% by weight of isopropyl alcohol or ethyl alcohol, and no more than 10% by weight of an isoalkane compound.
18 citations
TL;DR: In this paper, the rate-limiting step is mainly the decomposition of a termolecular complex to products, and it is shown that electron-donating substituents at the 4-position enhance the catalytic activity.
Abstract: 2,2′-Bipyridyl and some substituted compounds catalyze effectively the oxidation of isopropyl alcohol by chromic acid. The reaction is first order in chromium(VI), alcohol and 2,2′-bipyridyl; it is first order in hydrogen ions at high acidity and slightly alters to second order at low acidity. The proposed mechanism shows that the rate-limiting step is mainly the decomposition of a termolecular complex to products. However, at low acidity, the formation step of this complex is a little less reversible and hence somewhat rate-limiting. Electron-donating substituents at the 4-position enhance the catalytic activity. Electron-withdrawing substituents at the 4- and 2-positions diminish the reaction rates by electronic and steric factors.
18 citations
TL;DR: A highly-sensitive dosimetric system based on aqueous alcoholic solutions of tetrazolium salt has been developed and can be used for the determination of γ-radiation doses within the range 1–5 to 50 Gy.
11 citations
Patent•
25 May 1995
TL;DR: A hair spray containing a low proportion of volatile compounds and having improved spraying and setting properties comprising a) about 5% to about 50% of at least one lower alcohol selected from the group of ethanol, n-propanol and (or) isopropyl alcohol as discussed by the authors.
Abstract: The invention refers to a hair spray containing a low proportion of volatile compounds and having improved spraying and setting properties comprising a) about 5% to about 50% of at least one lower alcohol selected from the group of ethanol, n-propanol and (or) isopropyl alcohol; b) about 15% to about 70% by wt. water; c) about 1% to about 15% by wt. of at least one film-forming polymer; d) about 0.1% to about 3% by wt. of a water-dispersible silicone wax of the general formula I, ##STR1## wherein n and m may be identical or different and denote an integer between 10 and 20; which is either packed e1) as an aerosol spray composition with dimethyl ether or a compressed gas selected from the group of di-nitrogen oxide, air, nitrogen and (or) carbon dioxide as propellent, or e2) as a manually operated pump spray.
11 citations
TL;DR: The observation after coexposure to methyl ethyl ketone or isopropyl alcohol at low concentration is in line with the negative interaction between toluene and methyl ethYL ketone as well as between toLUene and isoproyl alcohol after occupational exposures at low concentrations.
11 citations
Patent•
31 Oct 1995
TL;DR: In this article, a gamma, delta-unsaturated alcohol of formula II is produced by reacting an alpha-olefin of formula I with an aqueous solution of formaldehyde using 2-20mol (based on 1mol of the formal dehyde in the formaldehyde solution) of a 3-10C alcohol (preferably isopropyl alcohol, etc.).
Abstract: PURPOSE:To produce a gamma,delta-unsaturated alcohol in high formaldehyde conversion and high selectivity and yield because of the suppressed by-production of alkyl- m-dioxanes by reacting an alpha-olefin with an aqueous solution of formaldehyde in the presence of a specific solvent. CONSTITUTION:This gamma,delta-unsaturated alcohol of formula II is produced by reacting an alpha-olefin of formula I (R to R each is H, a 1-10C alkyl, etc.) with an aqueous solution of formaldehyde using 2-20mol (based on 1mol of the formal dehyde in the formaldehyde solution) of a 3-10C alcohol (preferably isopropyl alcohol, etc.) as a solvent at a reaction temperature of 150-350 deg.C, preferably 200-330 deg.C. Concretely, 3-methyl-3-buten-1-ol is produced as the compound of formula II by using isobutene as the compound of formula I. The formaldehyde concentration of the formaldehyde solution is preferably 30-70% and the reaction pressure is preferably 50-300kg/cm .
10 citations
TL;DR: Using tetraethyl orthosilicate and aluminum tri-sec-butoxide as raw materials, two series of mullite gels were prepared, one involving a chemical modification of aluminum alkoxide by ethylacetoacetate, the other one by reacting both alkoxides in a nonhomologous Alcohol, I.e. isopropyl alcohol or 2-methoxyethanol as discussed by the authors.
9 citations
TL;DR: In this paper, the poisoning effect of Co3O4 on both supports and the activity of the catalysts is discussed, and the vapour phase decomposition of isopropyl alcohol over these catalysts was studied.
Abstract: Catalysts containing 20 wt.% Co3O4 supported on γ-Al2O3 and MgO were prepared. The catalyst precursors were analyzed by TG, DTG and DTA, and the calcined catalysts (400-700 °C) were characterized by XRD. The amount of excess surface oxygen for the catalysts was estimated iodometrically. The vapour-phase decomposition of isopropyl alcohol over these catalysts was studied. Co3O4/γ-Al2O3 catalysts are selective towards propene formation, whereas Co3O4/MgO catalysts are selective towards acetone formation. The poisoning effect of Co3O4 on both supports and the activity of the catalysts is discussed.
Patent•
25 Jan 1995TL;DR: In this paper, the authors present a method for preparing a titanium or titum alloy surface and a primer for use in the method, which broadly comprises the steps of grit blasting portions of the surface to which an adhesive will be applied and thereafter applying an acid wash primer to the surface portions.
Abstract: The present invention relates to a method for preparing a titanium or titum alloy surface and a primer for use in the method. The method broadly comprises the steps of grit blasting portions of the surface to which an adhesive will be applied and thereafter applying an acid wash primer to the surface portions. The acid wash primer preferably consists essentially of 70% by weight isopropyl alcohol, 5% by weight ethyl alcohol, 15% by weight n-butyl alcohol, 5% by weight zinc chromate and 5% by weight phosphoric acid.
Patent•
02 Mar 1995
TL;DR: In this paper, a process for extracting nucleic acids from a sample, which comprises the following steps: mixing the sample with a carrier which is at least one of the substances dextran, acrylamide or carboxymethylcellulose in order to produce a liquid mixture; mixing the liquid mixture with a reagent C, where the reagent A contained from the substances guanidinium thiocyanate, guaninium hydrochloride, potassium thiocoyanate and sodium thiocyclic acid, and at least
Abstract: The invention provides a process for extracting nucleic acids from a sample, which comprises the following steps: - mixing the sample with a carrier which is at least one of the substances dextran, acrylamide or carboxymethylcellulose in order to produce a liquid mixture; - mixing the liquid mixture with a reagent C in order to precipitate the nucleic acids and the carrier, where the reagent C contains at least one reagent A selected from the substances guanidinium thiocyanate, guanidinium hydrochloride, potassium thiocyanate and sodium thiocyanate, and at least one reagent B selected from the substances n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol and tert-amyl alcohol; and - separating the precipitated nucleic acids and the precipitated carrier from the liquid phase. The process is easier to use than the procedures hitherto practised, it contains a smaller number of steps, is able to reduce the possibility of aerosol formation, can be carried out within a short time, requires no phenol or chloroform and, nevertheless, achieves a constant efficiency of extraction of nucleic acids. Also disclosed is a method for detecting a particular nucleic acid sequence.
Patent•
26 Jan 1995
TL;DR: In this paper, a one-step method for synthesis of ethers from acetone is described, which involves reacting an acetone-rich feed over a bifunctional catalyst comprising 5%-45% by weight hydrogenation catalyst on 55%-95% of the total catalyst weight of a support comprising a zeolite and a Group III or IV metal oxide.
Abstract: A one-step method is disclosed for synthesis of ethers from acetone, which method comprises reacting an acetone-rich feed over a bifunctional catalyst comprising 5%-45% by weight hydrogenation catalyst on 55%-95% of the total catalyst weight of a support comprising a zeolite and a Group III or IV metal oxide.
Patent•
18 Apr 1995
TL;DR: In this article, a specific metal oxide ingredient with a fluororesin and a solvent is used to improve water repellency, oil repellent, dispersibility, and stability.
Abstract: PURPOSE:To improve water repellency, oil repellency, dispersibility, and stability by mixing a specific metal oxide ingredient with a fluororesin and a solvent. CONSTITUTION:An alkoxide, acetylacetonate, chloride, or nitrate of a metal selected from among Si, Ti, Zr, and Al is hydrolyzed or polycondensed to obtain a metal oxide ingredient (A) having a pH of 4-10. The ingredient (A) is mixed in an amount of 0.5-20wt.% with 30-300wt.% fluororesin (B) having a particle diameter of 0.6mum or smaller, e.g. polytetrafluoroethylene, polychlorofluoroethylene, poly(vinylidene fluoride), a copolymer of hexafluoropropylene with tetrafluoroethylene, or a tetrafluoroethylene/ethylene copolymer, and at least one solvent (C) selected from among water, methanol, ethanol, and isopropyl alcohol.
Patent•
19 Dec 1995
TL;DR: In this paper, the transesterification reaction of an organic ester compound with an alcohol in the presence of a lanthanoid metal compound catalyst was studied, and it was shown that the resulting ester compounds are useful as various production raw materials.
Abstract: PURPOSE:To easily obtain an ester compound useful as various production raw materials, etc., under mild condition in a high purity by the transesterification reaction of an organic ester compound with an alcohol in the presence of a lanthanoid metal compound catalyst. CONSTITUTION:An ester compound is produced by the transesterification reaction of (A) an organic ester compound of preferably formula I [R and R are each a (substituted)hydrocarbon group] with (B) an alcohol of preferably formula II [R is a (substituted)hydrocarbon group] in the presence of (C) a metal alkoxide compound of preferably formula III [M is one or more kinds of lanthanoid metal elements; R is a (substituted)hydrocarbon group]. For example, isopropyl benzoate is produced by adding Yb(O-t-Bu)3 to methyl benzoate and isopropyl alcohol and stirring the mixture.
Patent•
07 Feb 1995
TL;DR: In this article, a process for producing a low-odor vinyl acetate resin emulsion with a low residual monomer content was presented, where isopropyl alcohol was fed together with the monomer component and after all the catalyst is added dropwise, butyl alcohol is added.
Abstract: PURPOSE: To obtain a process for producing a low-odor vinyl acetate resin emulsion with a low residual monomer content CONSTITUTION: In the process for producing a vinyl acetate resin emulsion by the emulsion polymn of a monomer component comprising vinyl acetate or a mixture thereof with a monomer copolymerizable therewith in the presence of a protective colloid and a polymn catalyst, isopropyl alcohol is fed together with the monomer component and after all the catalyst is added dropwise, butyl alcohol is added COPYRIGHT: (C)1996,JPO
Patent•
21 Sep 1995
TL;DR: In this article, a method consisting of agitatingly mixing 30 parts aluminium oxide containing over 80% alpha aluminium oxide, 20 parts silica, 10 parts titanium oxide, 5 parts ferrite (Fe2O3), 1 part pigment, and 34 parts isopropyl alcohol at 25-35 deg.C for 2-6 hours was proposed.
Abstract: The method comprises (A) agitatingly mixing 30 parts aluminium oxide containing over 80wt% alpha aluminium oxide, 20 parts silica, 10 parts titanium oxide, 5 parts ferrite (Fe2O3), 1 part pigment, and 34 parts isopropyl alcohol at 25-35 deg.C for 2-6 hours ; (B) aging the mixture for 6 hours ; (C) diluting it again with isopropyl alcohol of an amount equivalent to 1/3 of the total compositon ; (D) first coating the ceramic composition on the aluminium surface, followed by drying in the furnace at 180 deg.C for 2 mins ; (E) second coating the ceramic composition thereon ; and (F) calcining the coated aluminium in the drying furnace at 250 deg.C for 20 mins.
Patent•
26 Apr 1995TL;DR: In this paper, a two-step integrated process for the generation of diisopropyl ether from an acetone-containing stream comprises: a) reducing the acetone containing stream over a bulk metal, nickel-rich catalyst to give an isopropanol-rich effluent; b) passing said isoprol-rich intermediate directly to a second reactor, and c) subjecting the isoproanol rich intermediate to dehydration conditions in the presence of hydrogen and a strong acid zeolite catalyst from the group consisting of β-zeolite, β-ZEol
Abstract: A two-step integrated process for the generation of diisopropyl ether from an acetone-containing stream comprises: a) reducing the acetone-containing stream over a bulk metal, nickel-rich catalyst to give an isopropanol-rich effluent; b) passing said isopropanol-rich intermediate directly to a second reactor, and c) subjecting said isopropanol-rich intermediate to dehydration conditions in the presence of hydrogen and a strong acid zeolite catalyst from the group consisting of β-zeolite, β-zeolite modified with one or more metals from Groups IB and VIII of the Periodic Table, and a dealuminised Y-zeolite, optionally mixed with a binder selected from Group III or IV of the Periodic Table.
Patent•
07 Jun 1995
TL;DR: In this paper, a simplified method using the combination of specific acidic ion exchange resins was proposed. But this method was not suitable for the use of diisopropyl ether as a gasoline base material.
Abstract: PURPOSE: To efficiently obtain diisopropyl ether useful as a gasoline base material by a simplified method using the combination of specific acidic ion exchange resins. CONSTITUTION: The method for producing diisopropyl ether comprises reacting propylene with water in the presence of two kinds of catalysts consisting of (A) a water saturation type acidic ion exchange resin catalyst preferably having an acid group concentration of 2.2-3.0meq./g and (B) a catalyst obtained by dehydrating and drying a water saturation type acidic ion exchange resin and subsequently treating the dried product with a saturated or unsaturated alcohol preferably isopropyl alcohol. Therein, the component A is preferably a strong acidic sulfonic acid type acidic ion exchange resin catalyst, etc. The dehydration treatment is preferably performed at 30-150°C under a vacuum of 0.01-50Torr for 1-50hr, and the alcohol treatment is also performed at 40-60°C at the atmospheric pressure for 1-10hr. COPYRIGHT: (C)1996,JPO
Patent•
05 Oct 1995
TL;DR: In this article, a highly integrated process for concurrently producing diisopropyl ether and an isoprophyl tertiary alkyl ether has been developed, where the effluent of the first reactor is separated into an ether rich stream, a water rich stream and an alcohol rich stream.
Abstract: A highly integrated process for concurrently producing diisopropyl ether and an isopropyl tertiary alkyl ether has been developed. In a first reactor, propylene and water are reacted to form isopropyl alcohol, a portion of which is further reacted to form diisopropyl ether. After removing unreacted propylene, the effluent of the first reactor is separated into an ether rich stream, a water rich stream and an alcohol rich stream. The alcohol rich stream and isobutylene, isoamylene or a mixture thereof are reacted to form an isopropyl tertiary alkyl ether in a second reactor. The water present in the alcohol rich stream also reacts with the iso-olefin to form tertiary alcohol. The effluent from the second reactor is water washed to produce an oxygenate product stream and an aqueous alcohol recycle stream. Some tertiary alcohol is recycled to the first reactor where it is reacted with propylene to form additional isopropyl tertiary alkyl ether. The isopropyl tertiary alkyl ether and some tertiary alcohol is collected along with the diisopropyl ether in the mixed oxygenate product stream from the water wash.
Patent•
03 Oct 1995
TL;DR: In this paper, a permanent waving agent composition containing an active reducing thio compound and a combination of (a) about 0.25wt.% to about 5.5 wt.% of ethyl alcohol, n-propyl alcohol or isopropyl alcohol was proposed.
Abstract: PURPOSE:To obtain the subject composition being mild and hardly having irritating property and capable of bringing out excellent waving effect without impairing hair even after repeatedly using. CONSTITUTION:This permanent waving agent composition contains an at least one kind of active reducing thio compound and a combination of (a) about 0.25wt.% to about 5wt.% of ethyl alcohol, n-propyl alcohol or isopropyl alcohol, (b) at least one kind of compound selected from a group consisting of about 0.25wt.% to about 2.5wt.% of 1,2-propanediol, 1,2-butanediol, 1,3-butanediol, glycerin and dipropylene glycol monomethyl ether and (c) about 0.25wt.% to about 7.5wt.% of 1-methoxypropanol(-2), diethylene glycol monomethyl ether or diethylene glycol monoethyl ether (wherein each wt.% is an amount calculated based on total content of the composition capable of immediately using).
Patent•
04 Dec 1995TL;DR: In this paper, an inert solvent is used in the liquid phase process for the production of isopropyl alcohol and diisopropy ether from a propylene-rich hydrocarbon feedstream and water where the process is carried out in contact with acidic aluminosilicate catalyst particles.
Abstract: A process has been discovered to employ an inert or unreactive solvent in the liquid phase process for production of isopropyl alcohol and diisopropyl ether from a propylene-rich hydrocarbon feedstream and water where the process is carried out in contact with acidic aluminosilicate catalyst particles. When an inert solvent is used, oxygenates production is enhanced and catalyst productivity is substantially increased.
Patent•
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05 Dec 1995
TL;DR: In this article, the flux for soldering is formed by incorporating an org. solvent which has a b.p. >= 200 deg.C and without having hydroxyl groups; for example, any polyhydric alcohol deriv., ketone and ester, is composed as the flux by dissolving rosin and activator with isopropyl alcohol.
Abstract: PURPOSE:To obtain a flux which does not generate residues as the flux for soldering. CONSTITUTION:The flux for soldering formed by incorporating an org. solvent which has a b.p. >=200 deg.C and without having hydroxyl groups; for example, any among polyhydric alcohol deriv., ketone and ester, is composed as the flux for soldering obtd. by dissolving rosin and activator with isopropyl alcohol.
Patent•
20 Mar 1995
TL;DR: In this article, the authors proposed a method to produce isopropyl alcohol by the hydration of diisoprophyl ether, which is an easier reaction than, for example, the hydrating of propylene.
Abstract: In process for the production of diisopropyl ether, a propylene-containing stream is contacted with isopropyl alcohol in a first stage in the presence of a catalyst under conditions to produce an effluent stream comprising diisopropyl ether. At least a portion of this effluent stream is recycled to a second stage where the diisopropyl ether is reacted with water to produce isopropyl alcohol. The isopropyl alcohol is then recycled to the first stage. The benefit of producing isopropyl alcohol by the hydration of diisopropyl ether is that it is an easier reaction than, for example, the hydration of propylene. As a result, the process of the present invention can operate under less severe conditions, i.e., less cost.
Patent•
05 Sep 1995
TL;DR: In this article, the authors proposed a method to produce 3-oxy-5-oxo-6-heptenoic acid derivatives in a shortened time by reaction of an aromatic aldehyde and an oxyglutaric acid derivative.
Abstract: PURPOSE: To enable high-yield production of 3-oxy-5-oxo-6-heptenoic acid derivative which is useful as an intermediate for a blood cholesterol depressant in a shortened time by reaction of an aromatic aldehyde and an oxyglutaric acid derivative. CONSTITUTION: An aromatic aldehyde of the formula: Ar-CHO (Ar is an aromatic group) and a compound of formula I (R is an aliphatic group; R is a hydroxyl-protecting group; R and R are each a hydrocarbon group) are allowed to react with each other in the presence of a base of the formula: MxA (M is an alkali metal, A is carbonate or bicarbonate group) such as potassium carbonate in an aliphatic alcohol solvent such as isopropyl alcohol at -30 to +50 deg.C for 0.3-24 hours to give the objective compound of formula II. The aliphatLc alcohol solvent preferably contains water in an amount of 30-20,000ppm. The amount of the compound of formula I is 0.8-1.5 mole per mole of the aromatic aldehyde and the solvent is 10-100 moles, and the base is 0.7-1.8 mole, respectively.
TL;DR: The nonvolatile residue monitor (NRM) operated in the batch mode has been investigated for measuring residue after evaporation (RAE) of isopropyl alcohol (IPA) and acetone as mentioned in this paper.
Abstract: The nonvolatile residue monitor (NRM) operated in the batch mode has been investigated for measuring residue after evaporation (RAE) of isopropyl alcohol (IPA) and acetone. IPA, acetone, and water were doped with known concentrations of known contaminants and then measured with the NRM to determine its calibration for these liquids. The calibrations were measured with different types of contaminants and with different drying temperatures. The NRM's calibration was identical for IPA, acetone, and water when calibrations were performed with water-soluble contaminants. Less ideal behavior was observed with water-insoluble contaminants. The NRM's performance in evaluating high purity semiconductor grade isopropyl alcohol and acetone was also investigated. RAE levels were measured in solvents purchased from four different suppliers to the semiconductor industry. The NRM was able to differentiate between the suppliers.
Patent•
14 Jun 1995
TL;DR: In this article, a method and apparatus for the on-site reprocessing of isopropyl alcohol used in semiconductor manufacturing, to generate an ultradry and ultrapure isoprophyl alcohol, produced through a pervaporation step, followed by a two-step distillation, is presented.
Abstract: A method and apparatus for the on-site reprocessing of isopropyl alcohol used in semiconductor manufacturing, to generate an ultradry and ultrapure isopropyl alcohol, produced through a pervaporation step, followed by a two-step distillation, wherein the first distillation step, an autonomous azeotropic self-stripping distillation column (78) is used to produce an ultradry and partially purified isopropyl alcohol, and in the next distillation step, the isopropyl alcohol is distilled in an overhead product distillation column (164), to produce an ultrapure and ultradry isopropyl alcohol.
Patent•
19 Sep 1995
TL;DR: In this paper, the authors proposed a solid fuel slurry composition consisting of a sulfonated product of aliphatic diene (co)polymer, lignosulfonic acid (salt), clay minerals, solid fuel and water.
Abstract: PURPOSE:To obtain the subject highly economical composition maintaining its high concentration and high fluidity for a long period, comprising a sulfonated product of aliphatic diene (co)polymer, lignosulfonic acid (salt), clay minerals, solid fuel and water. CONSTITUTION:This solid fuel slurry composition comprises (A) a sulfonated product of aliphatic diene (co)polymer (B) a lignosulfonic acid (salt), (C) clay minerals (e.g. montmorillonite), (D) a solid fuel (e.g. coal), and (E) water, where the component A is prepared by the following processes: a pressure reaction vessel is charged with an aliphatic diene compound (e.g. isoprene) followed by addition of n-butyllithium ad cyclohexane and then conducting a polymerization at 60-90 deg.C for 4hr; subsequently adding isopropyl alcohol to the reactional system to terminate the polymerization followed by removing the solvent and unreacted monomer and adding 1,2-dichloroethane to the system and then adding anhydrous sulfuric acid-dioxane complex to carry out a sulfonation.