Showing papers on "Isopropyl alcohol published in 1994"

Method for consolidating a subterranean formation

Abstract: A method for consolidating a subterranean formation to control the production of particulates therefrom. A specific consolidating solution comprised of an allyl monomer and an initiator is injected into the formation where it is allowed to set at an elevated temperature to harden and form a permeable, consolidated mass. The allyl monomer is an allyl ester selected from the group of diallyl orthophthalate, diallyl isophthalate, diallyl terephthalate, diallyl benzenephosphonate, diethylene glycol bis (allyl carbonate) and other known allyl monomers and the initiator is preferably a peroxy compound (e.g. benzoyl peroxide, diisopropyl peroxydicarbonate, etc.) or an azo compound (e.g. 4,4'-azobis(4-cyanovaleric acid). A diluent such as an alcohol (e.g. isopropyl alcohol or isobutyl alcohol) or a mutual solvent (e.g. ethylene glycol monobutyl ether, diacetin, triacetin, acetone, etc.) and a coupling agent (e.g. an organofunctional silane) may be added if needed.

Antiinflammatory and analgesic transdermal gel

Abstract: Transdermal gels comprising (1) ketoprofen as an effective component, (2) poloxamer, (3) one or more agents selected from ethyl alcohol, isopropyl alcohol, propylene glycol, polyethylene glycol and glycerin, (4) one or more agents selected from the group consisting of lauric acid, oleic acid, capric acid, myristic acid, lauryl alcohol, oleyl alcohol and menthol, (5) water or a buffer solution. The gels form thin and pliable films, which are easily washable with water. They possess prolonged antiinflammatory and analgesic activities and physicochemical stability with less systemic side effects and gastric irritation.

Isopropyl alcohol intoxication in a neonate through chronic dermal exposure: a complication of a culturally-based umbilical care practice.

Abstract: A 21-day-old boy presented to our emergency department hypotonic, lethargic, and intermittently unresponsive to pain A workup for ketoacidosis, sepsis, and central nervous system hemorrhage was negative A urine drug screen collected eight hours after hospitalization showed 39 mg/dl of isopropyl alcohol and 76 mg/dl of acetone The first serum drug analysis was not performed until 18 hours after admission, at a time when there had been clinical improvement The isopropyl alcohol concentration was 8 mg/dl, and the acetone concentration was 203 mg/dl Management was supportive, and the patient stabilized He was discharged from the hospital in good health in three days A further review of the history showed no evidence for an oral exposure to isopropyl alcohol However, since leaving the maternity hospital the mother had been applying gauze pads or cotton balls soaked with isopropyl alcohol to the umbilicus with every diaper change We conclude that the child suffered from an isopropyl alcohol intoxication that occurred by absorption through the umbilical area

Fortified hydrocarbon and process for making and using the same

Abstract: Fortified hydrocarbon torch gas is a mixture of a major portion by weight of hydrocarbon base gas such as liquefied petroleum gas (LPG) or natural gas and additive selected from 1,2-ethanediol, 1,2-propanediol, 1,3-butanediol, glycerol, diethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol dimethyl ether, ethyl acetate, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, sec butyl alcohol, propionaldehyde, and butyraldehyde.

Reactive compounds for effective utilization of silica

Abstract: Bis(diisopropyl)thiophosphoryl disulfide (DIPDIS), diisopropyl thiophosphoryl-N-oxydiethylene sulfenamide (DIPTOS), diisopropyl thiophosphory)-N-oxydiethylene disulfide (DIPTOD), diisopropyl thiophosphoryl-2-benzothiazole monosulfide (DIBMS), diisopropyl thiophosphoryl-2-benzothiazole disulfide (DIBDS) and bis(diisopropyl)thiophosphoryl monosulfide (DIPMS) react with silica and generate isopropyl alcohol as a result of rubber-DIPDIS-silica interactions. Increasing the amount of DIPDIS in the system brings about a corresponding increase in silica-rubber coupling, resulting in enhancement of ΔTf−ΔTg modulus and tensile strength. The vulcanizates containing 14 mmol DIPDIS and 35 phr of silica exhibit highest torque and tensile strength. This is commensurate with the optimum loading derived from Lee's method. The synergistic system containing DIPDIS and N-oxydiethylene-2-benzothiazole sulfenamide (OBTS) provides a very useful combination of accelerators. The vulcanizates obtained from this system exh...

Gradient catalyst system for the integrated production of isopropyl alcohol and diisopropyl ethers

Abstract: Disclosed is an integrated process for the generation of a mixture of ethers, such as diisopropyl ether, methyl tertiary butyl ether, and/or isopropyl tertiary butyl ether, from a crude by-product acetone stream composed of acetone, tertiary butyl alcohol and methanol by passing such a stream, in the presence of hydrogen, over a catalyst system characterized by having both a hydrogenation activity gradient along the reactor in one direction and an etherification activity gradient in the opposite direction.

Isopropyl alcohol gel composition and process for preparing same

Abstract: An isopropyl alcohol gel having use as a rubbing composition and having antiseptic properties. The isopropyl alcohol gel of the present invention comprises a polymer, water, isopropyl alcohol and a polymer neutralizing agent. The polymer is dispersed in water to create a thick phase. The preferred polymer is a carbomer resin that forms a slightly gelatinous mass through hydration of the polymer. The selected amount of isopropyl alcohol is added by dispersion to the polymer-water phase. The mixture is allowed enough time to fully hydrate. A neutralizing agent is thereafter added to neutralize the activity of the polymer. The neutralizing agent is preferably tetrahydroxypropyl ethylenediamine. The resulting product is in homogenous heavy clear gel form.

Liquid composition, ink set and image forming method using the same

Abstract: PURPOSE:To reduce the bleeding generated at the time of the formation of a color image on plain paper and to obtain a water-resistant image by adding a specific cationic compd. and a water soluble cationic surfactant to water to prepare a liquid compsn. suitable for ink used in an ink jet recording method. CONSTITUTION:A liquid compsn. suitable as ink used in an ink jet recording method is prepared by adding one compd. selected from cationic compds. represented by formulae I-III (wherein R is a 18 or more C alkyl group and X is Cl or Br) to water using a water soluble org. solvent and further adding a water soluble cationic surfactant thereto. As the water soluble org. solvent, at least one monohydric alcohol selected from a group consisting of ethanol, isopropyl alcohol, n-butyl alcohol and isobutyl alcohol is used. By this constitution, the bleeding of an image is prevented and color reproducibillty is enhanced.

Structure and Electronic Effects of Cobalt Ferrites, CoxFe3-xO4, on Catalytic Decomposition of Isopropyl Alcohol

Abstract: The cobalt ferrite spinel oxides CoxFe3-xO4 (O < x < 3) have been prepared by coprecipitation. Their structures were characterized by DTA, X-ray diffraction and IR spectra, and their surface properties were determined from nitrogen adsorption isotherms at -196 °C. Conductance of all the compositions was studied with and without isopropanol. The variation of Eσ values was discussed in terms of oxide semiconducting properties and of ion distribution in the octahedral-tetrahedral sites of the spinel structures. The catalytic decomposition of isopropanol at 325 °C in a flow system allowed to conclude that the inverse spinels formed in the iron-rich region are active and selective sites for acetone formation, in contrast to the inverse spinels formed in the cobalt-rich region. On the other hand, the region of normal spinels showed low activity and selectivity to acetone formation. Correlations between the composition and electronic and catalytic properties of the catalysts are reported.

Method for determining component in urine

Abstract: PURPOSE:To determine hippuric acid (HA), 0-methyl hippuric acid (MHA), m-MHA, P-MHA, and mandel acid (MA) in urine rapidly and simply using an aqueous solution containing a specific aqueous solution alcohol as an elutant. CONSTITUTION:The HA, o-MHA, m-MHA, p-MHA, and MA inside urine are determined using an aqueous solution containing an aqueous alcohol with two or more carbons as an elutant by a high-speed liquid chromatography (HPLC) using a column where octadecyl silica gel (ODS) is filled. Examples of aqueous solution alcohol with two or more carbons are ethyl alcohol, isopropyl alcohol etc. The concentration inside the elutant of alcohol is normally 2-20V/V%. Urine which is diluted by water and alcohol is poured into the HPLC device in that the column where ODS is filled and which is balanced by the elutant is fitted, the elutant is allowed to flow at a specific temperature and flow rate, and then the peak of HA, etc., to be exuded is detected by an ultraviolet spectrophotometer, etc. The concentration of HA, etc., inside the specimen is determined by fitting to the concentration of the HA, etc., and the calibration curve of the peak area which are created previously.

Influence of Oxygen Content on Formation of Yttrium α‐SiAlON Ceramics

Abstract: Low porosity α- and β-SiAION composite material was prepared when the powder mixture intended for preparation of yttrium α-SiAlON, with the formula Y0.4Si12–m+n Alm+nOnN16–n, was attritor milled in isopropyl alcohol or contained excess oxygen (n > 0.6). The region of stability of single-phase yttrium α-SiAlON was smaller at lower temperatures. Wet milling (in isopropyl alcohol) of AIN powder was found to introduce excess oxygen into the milled powder.

Continuous single vessel distillation and adsorption process

Abstract: The present invention is a process for separating at least a first component from a second component of at least a first stream within a single vessel having at least one distillation zone and an adsorption zone. The invention may be applied to separates an alcohol from a mixture of the alcohol and water, such as separating isopropyl alcohol from a mixture of isopropyl alcohol and water. The invention may be applied to more complex systems such as separating isopropyl alcohol and separating diisopropyl ether from the effluents of each reactor of a two-stage diisopropyl ether production process. The benefit of the invention is a high purity separation process at reduced capital equipment costs.

Radical methyl methacrylate—methacrylic acid copolymerization in isopropyl alcohol, acetone, and their mixtures. Application of the copolymer products for microencapsulation of ampicylline trihydrate

Abstract: The copolymerization ratios of radical methyl methacrylate (MMA)-methacrylic acid (MA) copolymerization in mixtures of isopropyl alcohol (IPA) with acetone (A), xylene (X), and water (W) are determined. Their values and those in IPA are smaller than unity. The established alternating tendency of the monomer parts in the obtained copolymers is somewhat larger than the theoretically expected one and this is explained by the donor-acceptor interaction either between comonomers or between them and the propagating radicals. It is suggested that the reason for this tendency is the difference in H-bond formation between comonomers and solvents used. The dependencies of the apparent mass average molecular weight of the copolymers (Mw, ap) on their composition are also determined as well as the θ-composition of the A-heptane (H) mixture for these copolymers. These data are used for ampicyl line trihydrate (AT) microencapsulation by phase separation of the AT suspension in copolymer solutions in A after H addition. The AT microencapsulation characteristics (yield, degree and efficiency) as dependent on the copolymer composition as well as the influence of this composition on the solution kinetics of the microencapsulated AT at pH=4.5 and 6.5 and temperature of 37°C are established.

Preparation of a multi-purpose cleaner

Abstract: A two-stage formulation for a general purpose industrial cleaner has been found to be ideal in terms of its effectiveness, ease of production and long term stability. The base compound formulation includes: (1) water, (2) tetrapotassium pyrophosphate (T.K.P.P.), (3) trisodium phosphate, (4) a premixed blend of tall oil fatty acid, nonionic surfactant, and monoethanolamine, (5) coconut diethanolamide, (6) glycol butyl ether, (7) isopropyl alcohol, and (8) 45% potassium hydroxide solution. A finished product is made from; (1) water, (2) base compound, (3) more T.K.P.P., (4) more glycol ether butyl, and (5) lemon fragrance. The two-part formulation allows for the concentrated base compound to be separately mixed and shipped with the diluted finished product to be formulated near the locality of the end user.

Production of aqueous polymer solution of low molecular weight

Abstract: PURPOSE:To obtain a polymer which can be a high-concentration product with no color and high clarity by polymerizing a carboxyl-bearing unsaturated monomer and other copolymerizable monomers in a solvent system having a certain chain transfer constant from methyl acrylate to the solvent system. CONSTITUTION:A carboxyl group-containing unsaturated monomer and other copolymerizable monomers are polymerized in a solvent system having 3X10- to 100X10- chain transfer constant (Cs) from methyl methacrylate to this solvent system. The carboxyl group-containing unsaturated monomer is preferably acrylic or methacrylic acid. The other copolymerizable monomer is, for example, acrylamide. The solvent exemplified is, for example, isopropyl alcohol, ethyl alcohol, nitrobenzene, n-propyl alcohol, preferably isopropyl alcohol.

Conversion of isopropyl alcohol to acetone catalysed by Cr2O3 at 473 K: role of molecular oxygen

Abstract: The conversion of isopropyl alcohol to acetone has been studied over Cr2O3 powder at 473 K in a flowing microcatalytic reactor. Appreciable steady-state catalytic activity was achieved only when oxygen was present in the reactant gas flow. The effect of mild pretreatment of Cr2O3 in O2–N2 at 473 K on the initial activity, and the observed dependence of the process on O2 pressure has been related to the oxidation–reduction cycle of the surface chromium species. Cr(3+n)+ on the surface of Cr2O3 have been considered to be the active species, where n= 1–3.

Terpene-based method for removing flux residues from electronic devices

Abstract: In a method for cleaning using terpene compositions, the generation of harmful precipitates is substantially eliminated or significantly reduced by adding a polar solvent, such as isopropyl alcohol, to the terpene composition. One to twenty percent of the cleaning composition should be alcohol, although it is preferred that it be in the five to fifteen percent range. The upper limit reflects primarily the desire to reduce the flammability of the solvent. Alternatively, the electronic devices can be rinsed with a terpene, alcohol mixture, but this alternative is much less preferred because of the flammability problem.

Paint solvent formulations and methods of use

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 characteristcs 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.

Production of aluminum alkoxide

Abstract: PURPOSE:To stably and efficiently produce an aluminum alkoxide without using a catalyst by reacting granular aluminum having a specific size with an alcohol having a prescribed content or below of moisture. CONSTITUTION:Granular aluminum having 2-100mm, especially 5-50mm diameter is made to react with an alcohol having <=2000mum moisture content thereof to afford the objective aluminum alkoxide. The alcohol is used in an equiv. amount of preferably 1.2 times or more based on the metallic aluminum. Isopropyl alcohol is especially preferred as the alcohol.

Method for purifying hydrochloric acid

Abstract: PURPOSE:To provide a method for simply purifying hydrochloric acid containing alcohols such as isopropyl alcohol. CONSTITUTION:In hydrochloric acid having an azeotropic concentration or above, containing alcohols, these alcohols are converted into a chlorinated hydrocarbon by a chemical reaction and then the chlorinated hydrocarbon is separated. Then, the separated gas containing unreacted alcohols is absorbed in hydrochloric acid and circulated.

Process for preparing arylsulfonyl halides

Abstract: Provided is a new process useful for preparing arylsulfonyl halides, which comprises the addition or drowning of halosulfonation reaction products, produced by the reaction of aromatic compounds (arenes), with excess halosulfonic acid, into C 3 -C 6 aliphatic ketones, preferably acetone, isopropyl alcohol, or mixtures thereof, instead of drowning into water as is known in the art of aromatic sulfonyl chloride preparation. Less heat of reaction is observed, thus making the drowning of the halosulfonation reaction mixture safer and more controllable. Further, less hydrogen chloride gas is evolved from the drowning mixture and generally more highly pure arylsulfonyl chlorides are produced.

Method for treating formations to plug flow

Abstract: A method for plugging a zone of a subterranean formation to block flow therethrough. A specific plugging solution comprised of an allyl monomer and an initiator is injected into the zone where it is allowed to set at an elevated temperature to harden and form a flow-blocking solid. The allyl monomer is an allyl ester selected from the group of diallyl orthophthalate, diallyl isophthalate, diallyl terephthalate, diallyl benzenephosphonate, diethylene glycol bis(allyl carbonate) and other known allyl monomers and the initiator is preferably a peroxy compound (e.g. benzoyl peroxide, diisopropyl peroxydicarbonate, etc.) or an azo compound (e.g. 4,4'-azobis(4-cyanovaleric acid). A diluent such as an alcohol (e.g. isopropyl alcohol or isobutyl alcohol) or a mutual solvent (e.g. ethylene glycol monobutyl ether, diacetin, triacetin, acetone, etc.) and a coupling agent (e.g. an organofunctional silane) may be added if needed.

Process for producing diisopropyl ether with removal of acid material

Abstract: A process for the production of diisopropyl ether where acid is removed, without extraction, from the reactor effluent before being recycled to the reactor or being passed to downstream processing units has been developed. The process involves (1) reacting propylene and water to produce isopropyl alcohol in a reactor and reacting the isopropyl alcohol with propylene to produce diisopropyl ether in the presence of an acidic ion exchange resin catalyst to afford a reactor effluent stream containing at least water, isopropyl alcohol, diisopropyl ether, propylene, and acid, (2) passing the reactor effluent to an acid removal zone to produce an acid-depleted stream, (3) dividing the acid-depleted stream into two portions, and (4) recycling a portion to the reactor and collecting a portion.

Anti-varicose gel - contg various plant ingredients, ethanol, tri:ethanol:amine, isopropyl alcohol and water

Abstract: The invention is for a gel whose main aim is to create a vasoconstrictive affect that facilities discharge in veins and mainly uses natural plants. The gel is obtained from horse chestnut trees, white hawthorn, witch-hazel, carbopol, trietanolamine, cremalyis, lion's teeth and devil's claw, using a small amount of CG and a solution of isopropilene alcohol and water. The gel is made through very fast agitation and by emptying, firstly of water, the CG and the carbopol for one hour, then adding the trietanolamine and isopropilene alcohol, shaking again for 10 minutes and finally adding the rest of the components, agitating again quickly for 10 minutes whilst maintaining the vacuum at all times.

Production of aromatic hydroxy compound

Abstract: PURPOSE: To produce an aromatic hydroxy compound represented by phenols under mild conditions by one step in high yield by directly oxidizing an aromatic compound with an oxidizing agent in the presence of a specific secondary alcohol and an acidic substance. CONSTITUTION: An aromatic compound is directly reacted with an oxidizing agent (preferably oxygen diluted with an inert gas) in the presence of at least one secondary alcohol selected from an aliphatic secondary alcohol and an alicyclic secondary alcohol and an acidic substance to give an aromatic hydroxy compound. Isopropyl alcohol is preferable as the secondary alcohol. Phosphoric acid, acetic acid or a heteropoly acid is preferable as the acidic substance. Benzene is preferable as the aromatic compound and phenol is preferable as the aromatic hydroxy compound. The reaction is preferably carried out in the presence of an oxidation catalyst such as a metal selected from iron, copper, palladium, platinum and titanium and its compound.

Production of brominated polystyrene

Abstract: PURPOSE: To facilitate the formation of a brominated polystyrene substantially free from an emulsifier, a dispersant, etc., by polymerizing a brominated styrene in an alcoholic solvent. CONSTITUTION: A brominated styrene is polymerized in an alcoholic solvent to obtain a polymer in the form of a dispersion. Although not particularly limited, the alcoholic solvent used is desirably exemplified by methyl alcohol, ethyl alcohol, isopropyl alcohol, or n-butyl alcohol. In order to obtain a polymer in a good dispersed state, it is desirable that the monomer concentration is 15wt.% or above. When the monomer concentration is 15wt.% or above, it is desirable to add a dispersant to the reaction system. To effect the molecular weight control and the prevention of gelation of the obtained brominated polymer, it is also possible to add a chain transfer agent to the reaction system. According to this process, a brominated polystyrene having a weight-average molecular weight of 10000 or above (in terms of polystyrene) is obtained.