Showing papers on "Isopropyl alcohol published in 1983"
TL;DR: Clinical, pharmacologic, and management data are presented, important aspects in differential diagnosis are contrasted, and an appropriate approach to management of isopropyl alcohol intoxication is suggested.
89 citations
TL;DR: In this paper, soy flakes were extracted with aqueous isopropyl alcohol (IPA) at 77 C in a Kennedy countercurrent continuous extractor at a retention time of 71 min.
Abstract: Soy flakes were extracted with aqueous isopropyl alcohol (IPA) at 77 C in a Kennedy countercurrent continuous extractor at a retention time of 71 min. IPA concentration was varied from 85.0 to 90.5% w/w and included the 87.7% IPA-water azeotrope. Solvent to meal ratios were varied from 1.5 to 3.0. The oil-IPA miscella leaving the extractor was chilled and coalesced to yield an oil phase and an IPA phase. The IPA phase was recycled to the extractor without being distilled. Excess IPA was expressed from the defatted flakes, and this also was recycled to the extractor. IPA recovered by distillation in the evaporator-stripper and desolventizer-toaster accounted for less than 10% of the total. Refined deodorized oils from the IPA extraction process compared favorably with their hexane counterpart in color, peroxide value and phosphorous and free fatty acid contents. Desolventized meals from the IPA process compared favorably with their hexane-extracted counterpart in protein, ash and fiber content.
68 citations
Patent•
23 Dec 1983
TL;DR: In this article, a high-active pancreatin is obtained by autolysis of an aqueous isopropanol-containing tissue slurry, preferably buffered with sodium bicarbonate, until a test precipitation with isopro-propyl alcohol proves positive, and precipitating the batch with a higher concentration of isopprobabilistic alcohol, resulting in a fiber suspension which can be sieved so that the solution obtained permits direct isolation of pancreatin by further increasing the concentration of polypropylalcohol.
Abstract: Highly active pancreatin is obtained by autolysis of an aqueous isopropanol-containing tissue slurry, preferably buffered with sodium bicarbonate, until a test precipitation with aqueous isopropyl alcohol proves positive, and precipitating the batch with a higher concentration of isopropyl alcohol, resulting in a fiber suspension which can be sieved so that the solution obtained permits direct isolation of pancreatin by further increasing the concentration of isopropyl alcohol A high bulk density of the finished dry preparation is achieved by stirring the precipitated pancreatin with isopropyl alcohol or acetone so as to bring the pancreatin to a concentration of 70-85% of isopropanol or 80-95% of acetone, isolating the pancreatin by suction filtration or centrifuging and drying it by treatment with dry air or nitrogen
43 citations
TL;DR: None of the seven products evaluated was significantly less bactericidal than 60 per cent isopropyl alcohol, and Experiments in volunteers showed that 0.5 per cent alcoholic triclosan was significantly more effective than all other preparations tested.
32 citations
TL;DR: In this paper, two blending agents were considered, tertiary butyl alcohol and isopropyl alcohol, and correlation equations were derived relating the percentage compositions and the separation temperature.
24 citations
Patent•
08 Feb 1983
TL;DR: An aqueous acidizer composition and method of utilizing same in the removal of scale from fresh water production equipment such as desalinators or evaporators (watermakers) and distillation units as well as heat exchangers and boilers is presented in this paper.
Abstract: An aqueous acidizer composition and method of utilizing same in the removal of scale from fresh water production equipment such as desalinators or evaporators (watermakers) and distillation units as well as heat exchangers and boilers. The composition contains a blend of three acids of varying strengths carefully selected to provide a timed release effect. The acids which are employed include hydrochloric acid, dichloroacetic acid and acetic acid. The composition further contains a surfactant such as isopropyl alcohol which provides surfactant properties and also reacts with the acids, resulting in multiple equilibria in which the corresponding esters are formed. The composition also includes an acid-base indicator such as methyl orange to signify neutralization of the acidizer during use in scale removal. The present composition is particularly effective in removal of phosphate and carbonate scale as well as some sulfate scale. Other deposits containing basic anions are also removed.
14 citations
TL;DR: In this paper, the Gibbs free energies of transfer for [Co(CysOS)(en)2]- and S2O82− have been estimated for this ion in mixtures containing up to 40% acetone, t-butyl alcohol, isopropyl alcohol and acetonitrile.
Abstract: The kinetics of oxidation of cysteinatobis(ethylenediamine)cobalt(III) ion, [Co(CysOS)(en)2]+, by peroxodisulphate were investigated at different ionic strengths, adjusted with various electrolytes, and at different temperatures and concentrations of perchloric acid. Rate constants and activation parameters are also reported for this oxidation in mixtures containing up to 40% acetone, t-butyl alcohol, isopropyl alcohol, or acetonitrile. The solubilities of [Co(CysOS)(en)2]ClO4 and KClO4 have been determined in water and aqueous acetone and aqueous t-butyl alcohol at 298.2 K. From these values, Gibbs free energies of transfer for [Co(CysOS)(en)2]+ and S2O82– have been estimated. The solvent effects on the oxidation have been divided into their initial-state and transition-state components.
11 citations
Patent•
20 Dec 1983
TL;DR: In this article, high active pancreatin is obtained by autolysis of an aqueous pulp containing isopropanol, preferably buffered with sodium bicarbonate.
Abstract: Highly active pancreatin is obtained by autolysis of an aqueous pulp containing isopropanol, preferably buffered with sodium bicarbonate, until a test precipitation with aqueous isopropyl alcohol has failed and precipitation with increasing concentration of isopropyl alcohol results in a fiber suspension which can be screened off and the immediate recovery of pancreatin from the solution further increase in the concentration of isopropyl alcohol allowed. High bulk density of the finished, dry preparation is achieved by bringing the precipitated pancreatin to a concentration between 70 and 85% of isopropanol or 80 to 95% of acetone by stirring with isopropyl alcohol or acetone, suctioned off or spun off and with treatment with dry air or nitrogen dries.
11 citations
TL;DR: In this paper, the competitive alkylation of toluene and benzene with ethanol, n-propyl alcohol, isopropyl alcohol and t-butyl alcohol over NiY and Ni, SnY zeolite catalysts is reported and analyzed.
Abstract: Results for the competitive alkylation of toluene and benzene with ethanol, n-propyl alcohol, isopropyl alcohol and t-butyl alcohol over NiY and Ni, SnY zeolite catalysts are reported and analysed. The effects of time on stream, reaction temperature (473–543 K) and space velocity on the positional and substrate selectivity in ethylation under non-isomerizing conditions are examined in detail for catalysts which had already reached their steady-state activity in methylation, a high coking reaction. In all cases the substrate selectivity and ethyltoluene isomer composition (27%para, 22%meta, 51%ortho) remained virtually constant.In contrast to alkylation with ethanol, isomerization of the product alkyltoluenes occurred when n- and iso-propyl alcohol were the alkylating reagents; however, as in ethylation no di- or poly-substituted products were detected.A thorough investigation of the substrate selectivity (reactivity) and para/meta selectivity of the alcohols as alkylating agents is reported, with reference to both the literature on homogeneous Friedel–Crafts alkylation and heterogeneous catalysis and also linear free energy relationships. The high ortho/para ratios and the high quantities of meta isomer obtained indicates that in all cases the alkylating agent is a highly reactive species; the electrophilic character or reactivity is very similar for methylation, ethylation, n-propylation and isopropylation and the isomer distributions obtained in the present work are remarkably similar to those reported in the literature for homogeneous catalysis. Since the alkylating agents had approximately the same reactivity the enormous increase in rates on changing from methanol to isopropyl alcohol as alkylating agent is attributed to the relative quantities of the intermediate carbonium ions on the catalyst surface.
11 citations
Patent•
21 Sep 1983
TL;DR: In this article, a process for the production of aliphatic alcohol by the direct hydration of an olefinic hydrocarbon was described, and the process was directed to produce isopropyl alcohol from a water-rich hydration zone effluent stream.
Abstract: A process is disclosed for the production of aliphatic alcohol by the direct hydration of an olefinic hydrocarbon. The process is directed to the production of isopropyl alcohol. The process includes the recovery of the alcohol from a water-rich hydration zone effluent stream by countercurrent liquid-liquid extraction against a paraffinic solvent. The solvent is derived from paraffins originally admixed with the olefin-containing feed stream, and the raffinate stream comprises water which is recycled in the process. Expensive product fractionation is eliminated in the production of a fuel grade isopropyl alcohol.
10 citations
TL;DR: The effect of Pd catalysts prepared via thermal decomposition of π-allyl Pd complexes on their catalytic activity in hydrogenation of olefins and dehydrogenation of isopropyl alcohol has been studied.
Abstract: The effect of the structure of Pd catalysts prepared via thermal decomposition of π-allyl Pd complexes on their catalytic activity in hydrogenation of olefins and dehydrogenation of isopropyl alcohol has been studied.
01 Jan 1983
TL;DR: In this paper, a surfactant system for a waterflooded reservoir at 80 C and having a salinity in the range of 20 to 30 g/L was formulated.
Abstract: The main objective of this investigation was to formulate a surfactant system for a waterflooded reservoir at 80 C and having a salinity in the range of 20 to 30 g/L. The equivalent alkane carbon number (EACN) of the crude oil at 80 C was found to be 9.3 as determined by a comparison of its optimal salinity with those of pure hydrocarbon oils. Isopropyl alcohol, isobutyl alcohol, secondary butyl alcohol, and tertiary amyl alcohol (TAA) were employed as cosolvents. The optimal salinity at 80 C of a petroleum sulfonate (TRS10-80), crude oil and any of the above alcohol containing system was found to be less than 1.3%. A phosphated ester (KF AA-270) was used as a cosurfactant with TRS10-80 in the weight ratio of 2/5 which increased the optimal salinity in the range of 25 to 35 g/L. However, the addition of this cosurfactant decreased the solubilization parameters drastically. In order to improve the solubilization of brine and oil in the middle phase microemulsion, inorganic salts such as Na2CO3 and sodium tripolyphosphate were added to the formulation. 37 references.
Patent•
25 Aug 1983
TL;DR: Flux consisting of a combination of pure colophonium with the three dicarboxylic acids adipic acid, salicylic acid and glutaric acid as activators, together with the solvent isopropyl alcohol is achieved on all the soft-solderable materials encountered in practise.
Abstract: Flux consisting of a combination of pure colophonium with the three dicarboxylic acids adipic acid, salicylic acid and glutaric acid as activators, together with the solvent isopropyl alcohol. As a result of combining these activators, a uniformly good soldering action is achieved on all the soft-solderable materials encountered in practise.
Patent•
29 Sep 1983
TL;DR: Isopropyl alcohol, secondary butyl alcohol and methyl tertiary butyl ether can be used as automobile petrol additives, particularly when mixed with methanol as discussed by the authors, and they can also be used for gasoline additive.
Abstract: Isopropyl alcohol, secondary butyl alcohol, methyl tertiary butyl ether, or a mixture of at least two thereof are produced from liquid petroleum gas by dehydrogenating propane, n-butane, iso-butane, or a mixture of at least two thereof in the gas to propylene, n-butylene, and iso-butylene, respectively, and then etherifying with methanol and/or hydrating the dehydrogenated gas to yield isopropyl alcohol, secondary butyl alcohol, methyl tertiary butyl ether, or a mixture of at least two thereof. The alcohols and ether can be used as automobile petrol additives, particularly when mixed with methanol.
Patent•
02 Sep 1983
TL;DR: In this article, an acrylic resin having an acid value of >=20 and containing hydroxyl group is mixed and reacted with a substantially water-insoluble butylated melamine resin in the presence of an alcohol (preferably isopropyl alcohol, etc.) to obtain the objective composition.
Abstract: PURPOSE:To prepare the titled compound which has excellent solvent resistance and chemical resistance and high hardness, and can be baked at a low temperature, by mixing and reacting an acrylic resin containing carboxyl group and hydroxyl group with a water-insoluble butylated melamine resin in the presence of an alcohol. CONSTITUTION:An acrylic resin having an acid value of >=20 and containing hydroxyl group is mixed and reacted with a substantially water-insoluble butylated melamine resin (preferably >=90% of the resin is insoluble in water) in the presence of an alcohol (preferably isopropyl alcohol, etc.) to obtain the objective composition. The acrylic resin is preferably the one obtained by the solution polymerization of a monomer containing carboxyl group in the molecule[e.g. (meth)acrylic acid]or a monomer containing hydroxyl group in the molecule (e.g. 2-hydroxyethyl acrylate) with a copolymerizable monomer such as ethyl acrylate.
Patent•
27 Jan 1983
TL;DR: In this article, a Ga1-xAlxAs plate of n type is washed with acetone or the like and polished by a cotton ball with isopropyl alcohol to which alumina powder of 0.06mu is added.
Abstract: PURPOSE:To remove physically an oxide film from the surface of the substrate of a chemical compound semiconductor containing Al, to form a film before the effect of re-oxidation appears, and thus obtain a large effective result, by polishing said surface with a liquid prepared by adding an abrasive material to alcohol or water. CONSTITUTION:A Ga1-xAlxAs plate of n type is washed with acetone or the like and polished by a cotton ball with isopROpyl alcohol to which alumina powder of 0.06mu is added. After an oxide film on the surface of a wafer is removed completely by this treatment, the plate is polished only by the cotton ball with no alumina powder being added, and thereby the alumina powder is removed. Then, ultrasonic cleansing being applied sufficiently in isopropyl alcohol, the plate is dried under infrared rays. Water may be employed as well. Immediately after this treatment is applied, Au/Ge is evaporated and heat treatment is applied, and thereby an excellent ohmic electrode can be obtained. This method can be applied for pre-treatment for forming an insulation film such as a CVD film, and a vapor-phase or liquid-phase epitaxial layer. In either case, the film is adhered very excellently.
TL;DR: In this article, the effect of partial pressure on the decomposition of isopropyl alcohol has been investigated and a possible mechanism for the reaction in the presence of gas phase oxygen is proposed.
Patent•
26 Aug 1983
TL;DR: In this paper, the authors proposed a platinum catalyst composition for the addition of an organosilicon compound having at least one Si-H group in the molecule of the compound and an org. compound with at least a poly-carbon multiplet bond.
Abstract: PURPOSE:To provide a platinum catalyst composition carrying out the addition reaction of a specific organosilicon compound and a specific org. compound, obtained by reacting platinum chloride and aliphatic unsaturated carboxylate. CONSTITUTION:As platinum chloride, platinous chloride or platinic chloride is used to prepare an isopropyl alcohol solution containing the same and aliphatic unsaturated monocarboxylate having one ethylene bond as 17-30C monocarboxylate, for example, sodium oleate is added to said solution to be heated and reacted under an alcohol reflux condition. The obtained platinum catalyst composition has at least one Pt-COOR bond (wherein R is an aliphatic unsaturated group) per one platinum atom. This platinum catalyst composition is useful as the catalyst for carrying out the addition reaction of an organosilicon compound having at least one Si-H group in the molecule thereof and an org. compound having at least one aliphatic-carbon multiplet bond.
Patent•
28 Jul 1983
TL;DR: In this article, the change in the concentration of a hydrophilic organic solvent in a mixed solvent used as a mobile phase in the reversed-phase liquid chromatography was used to purify crude secretin useful for treating peptic ulcer, etc.
Abstract: PURPOSE:To purify crude secretin useful for treating peptic ulcer, etc. in high purity and yield, by using the change in the concentration of a hydrophilic organic solvent in a mixed solvent used as a mobile phase in the reversed-phase liquid chromatography. CONSTITUTION:In purifying crude secretin by a reversed-phase liquid chromatography using a reversed-phase silica gel as a fixed phase and a mixed solvent of a hydrophilic organic solvent, e.g. isopropyl alcohol, with water as a mobile phase, the change in the concentration of the hydrophilic organic solvent is set within 20-90% range to carry out the adsorption, separation and elution of the aimed secretin. If the concentration of the isopropyl alcohol is =25%, the secretin is desorbed from the fixed phase and can be eluted with the mixed solvent of the above-mentioned concentration.
TL;DR: In this paper, the influence of saturated monohydric alcohol in the optimal ratio with water on the antifriction and anti-wear properties of water-ethylene glycol fluid was investigated.
Abstract: This paper reports on an investigation of the influence of isopropyl alcohol, used in the optimal ratio with water, on the antifriction and antiwear properties of water-ethylene glycol fluid. Lubricant fluids with specified compositions were tested. The results show that the addition of a saturated monohydric alcohol in the optimal amount to a water-ethylene glycol fluid reduces quite substantially the wear of metal surfaces in friction in a heavily loaded contact.
Patent•
02 Feb 1983
TL;DR: In this article, a subliming substance such as naphthalene, p-dichlorobenzene, etc. was used to destroy fungi in a short time.
Abstract: PURPOSE:The titled composition showing an effect such as destroying fungi in a short time, obtained by solubilizing a subliming substance in a chlorophenol having a specific boiling temperature and a saturated monohydric alcohol in such a way that the volatile fungiproof substance as a solvent is kept in the subliming solid substance. CONSTITUTION:A subliming substance such as naphthalene, p-dichlorobenzene, etc. as a main component is blended with 0.7-2.0wt.% chlorophenol such as p- chloro m-xylene, etc. having improved fungiproof effect and a boiling point of 210-250 deg.C and a saturated monohydric alcohol such as ethanol, isopropyl alcohol, etc. If necessary, a perfume of simple substance such as thyme oil, eucalyptus oil, etc. having also fungiproof effect, and a perfume fixative such as benzyl alcohol, etc. having volatilization control properties can be added to the composition. EFFECT:Having no complexity such as spraying, coating, etc., destroying fungi in a short time, forming a fungiproof vapor film on objects so that a new occurrence of fungi can be suppressed.
TL;DR: In this paper, the infrared spectra of an acetone adduct and a dimethyl ether adduct of the Grignard reagent CH3MgI have been obtained.
Patent•
06 Dec 1983
TL;DR: In this paper, the volume ratio of n-hexane or cyclohexane with respect to acetone is made 0.2-1.5, more preferably 0.5.
Abstract: PURPOSE:To obtain a soln. for regeneration of electrophotographic receptors which can regenerate electrophotographic receptors having undesired deposits on surfaces by toner filming or the like efficiently and safely with no smell in a shoft time. CONSTITUTION:The volume ratio of n-hexane or cyclohexane with respect to acetone is made 0.2-1.5, more preferably 0.6, and the volume ratio of isopropyl alcohol or ethyl alcohol with respect to cyclohexane is made 0.3-1.0, more preferably 0.5. Therefore, the preferable volume ratio of acetone/n-hexane or cyclohexane/isopropxyl alcohol or ethyl alcohol is roughly 3:2:1. Ethyl alcohol is used without using isopropyl alcohol in the case of adding cycloehxane to acetone.
Patent•
31 Mar 1983
TL;DR: In this article, a method was proposed to make uniform electrodeposition liquid by a method wherein supernatant liquid, which is made by standing after mixing by stirring phosphor, isopropyl alcohol, acetone, water and a lanthanum nitrate solution is added and mixed by stirring.
Abstract: PURPOSE:To make uniform electrodeposition liquid by a method wherein supernatant liquid, which is made by standing after mixing by stirring phosphor, isopropyl alcohol, acetone and a lanthanum nitrate solution, is removed and again a fixed quantity of isopropyl alcohol, acetone, water and a lanthanum nitrate solution is added and mixed by stirring. CONSTITUTION:When phosphor (Zns/Cu-Cl) 40-80g, isopropyl alcohol 750ml, acetone 250ml, a lanthanum nitrate solution 5ml are put into a container 5 and stirred to be made mixed liquid 6 followed by standing, supernatant liquid settles above while phosphor settles below. Subsequently the supernatant liquid is removed followed by further adding isopropyl alcohol 750ml, acetone 250ml, water 5ml and a lanthanum nitrate solution 1-1.5ml and stirring, whereby phosphor electrodeposition liquid is finished.
TL;DR: In this article, enthalpimetric and potentiometric titrations of 2-hydroxy-5-methyl-4-methoxy chalkone oxime (HMMCO), HMMCO, HCMCO, and HBMMCO were carried out in an acetone medium using tetra-n-butyl ammonium hydroxide, potassium hydroxides in isopropyl alcohol, and potassium tertiary butoxide in tertiarybutyl alcohol.
Patent•
03 Nov 1983
TL;DR: In this article, the authors describe a process for the preparation of 4-hydroxycoumarin derivatives, which consists in reacting the compounds of the general formula in which X denotes a hydrogen atom or nitro group, with sodium hydrogen carbonate using equimolar amounts of the reagents taken and boiling thereof in an aqueous medium.
Abstract: The present invention relates to the chemical/pharmaceutical industry. The alcohol complexes of 4-hydroxycoumarin derivatives are compounds of the total formula 1 in which: R denotes ethyl or propyl; X denotes a hydrogen atom or nitro group. The process for the preparation of these alcohol complexes of 4-hydroxycoumarin derivatives consists in reacting the compounds of the general formula in which X denotes a hydrogen atom or nitro group, with sodium hydrogen carbonate using equimolar amounts of the reagents taken and boiling thereof in an aqueous medium. The solution which contains the corresponding sodium salt is formed. The solution is evaporated and the solid sodium salt isolated as a result of the evaporation is treated by boiling with ethyl or isopropyl alcohol.
TL;DR: In this article, the reaction of 1-pentene with CHCl3 induced by peroxides yields CCl3(CH2CHC3H7)nH (n=1, 2) telomers in a 10∶1 ratio: 1,1,1-trichlorohexane and 1, 1, trichloron-3-propyloctane.
Abstract: 1.
The reaction of 1-pentene with CHCl3 induced by peroxides yields CCl3(CH2CHC3H7)nH (n=1, 2) telomers in a 10∶1 ratio: 1,1,1-trichlorohexane and 1,1,1-trichloro-3-propyloctane.
2.
1,1,1-Trichlorohexane is reduced in good yield to 1,1-dichlorohexane by isopropyl alcohol in the presence of Fe(CO)5. This reduction is accompanied by the rearrangement of CCl2(CH2)3CH2CH3 with 1, 5-hydrogen migration. Under the conditions selected, there is virtually no 1,6 -hydrogen migration from the CH3 group.