Showing papers on "Isopropyl alcohol published in 1991"

High alcohol content aerosol antimicrobial mousse

Abstract: This invention relates to a high alcohol content aerosol antimicrobial mousse which is dispensed as a foam for use as an antiseptic. The mousse composition comprises (1) 85-98% of an intermediate concentrate and (2) 2-15% of a hydrocarbon propellant. The intermediate concentrate comprises from 52-75% by weight of ethanol or isopropyl alcohol; from 0.1% to 1.5% by weight of a water-dispersible polymeric gelling agent; an amphiphilic system consisting of from 0.5% to 5.0% by weight of (a) at least one alcohol with a hydrocarbon group of from 16 to 22 carbons and (b) at least one nonionic surfactant, the hydrophilic balance (HLB) of the combination components "a" and "b" is in the range of 4.5 to 8.0 and the balance being at least 20 wt % of water. The hydrocarbon propellant is a saturated aliphatic hydrocarbon having from 2 to 6 carbon atoms.

Effect of isopropyl alcohol on the surface localization and recombination of conduction-band electrons in Degussa P25 titania: a pulse-radiolysis time-resolved microwave conductivity study

Abstract: Conduction-band electrons, formed by pulse radiolysis of Degussa P25 TiO{sub 2} particles, have been monitored by time-resolved microwave conductivity and found to undergo equilibrium localization and eventual recombination at the particle surface. In the presence of isopropyl alcohol recombination is retarded due to surface hole scavenging. The particle bulk can then be pumped with mobile electrons, which survive for seconds.

Metachromasy in clay-mineral systems: adsorption of cationic dyes crystal violet and ethyl violet by kaolinite from aqueous and organic solutions

Abstract: Adsorption of two cationic dyes, crystal violet (CV) and ethyl violet (EV), by kaolinite has been investigated by normal and comparative electronic spectroscopy. It was found that adsorption of both dyes from dilute aqueous solutions resulted in metachromasy. Adsorption from organic solvents (isopropyl alcohol or glycerol) led to metachromasy with CV but not with EV. Adsorption from mixed water–organic solvents was dependent on both the cationic dye used and the composition of the solvent. Quantitative determinations showed that both dyes were adsorbed to a greater extent from aqueous solutions than from isopropyl alcohol or aqueous isopropyl alcohol solutions, with more CV than EV being adsorbed.

Behaviour of copper–zirconium nasicon-type phosphate, CuIZr2(PO4)3, in the decomposition of isopropyl alcohol

Abstract: The phosphate catalyst CuIZr2(PO4)3 has been studied for the decomposition of isopropyl alcohol. Catalytic activity was observed to correspond mainly to dehydrogenation features, (the formation of acetone). This phenomenon has been related tentatively to the migration of CuI ions towards the surface and to their reduction to metallic Cu under catalytic reaction conditions. This occurred without a change in the crystallographic structure with the replacement of CuI ions by protons. Evidence for this was provided by: (i) XRD peaks corresponding to (111) and (110) metallic Cu diffractions; (ii) UV–visible spectroscopy with the appearance of a conduction band at 575 nm and of hydroxyl group combination and acetone bands at 1380 and 2220 nm, respectively; (ii) the appearance of hydroxyl bands at 3450, 1280, 825 and 520 cm–1 in the IR spectra and of protons detected by NMR; (iv) XPS analysis; and (v) SEM analysis, which showed the presence of 30 nm metallic Cu particles after catalytic reaction. Evidence was also seen that the formation of particles of Cu metal was reversible upon reoxidation at 240 °C, resulting in the formation of the CuIZr(PO4)3 starting material.

Synthesis and crystal structure of the double barium–titanium isopropoxide [Ba4Ti4(µ4-O)4(µ3-OR)2(µ-OR)8(OR)6(ROH)4][Ba4Ti4(µ4-O)4(µ3-OR)2(µ-OR)9(OR)5(ROH)3]

Abstract: An X-ray structural study of the crystals isolated from the solutions obtained by the reaction of Ba metal with Ti(OPri)4 in isopropyl alcohol has been carried out; the crystals of the compound, which is a precursor for the synthesis of BaTiO3, contain molecules of two different kinds [Ba4Ti4O4(OR)16(ROH)4] and [Ba4Ti4O4(OR)16(ROH)3], where R = Pri.

Cleaning and disinfectant compositions for household use possessing hypoallergenic properties and acaricidal capabilities

Abstract: A cleaning and disinfecting composition for household use comprising ethoxylated fatty alcohol; co-surfactant; isopropyl alcohol; polyhexamethylene biguanide hydrochloride; didecyldimethylammonium chloride and benzalkonium chloride.

Influence of the structure of alumina–aluminium phosphate (AAP) catalysts containing Fe3+ and Cr3+ on their catalytic activity for isopropyl alcohol decomposition

Abstract: Phosphate catalysts of the general formula Al100PxM20, where M = Al, Cr, Fe and x= 0, 4.5, 9, 18, 36, 72 and 144, have been prepared by coprecipitation of the corresponding nitrate salts and phosphoric acid with ammonia at pH 9.5. The resulting solids, after characterization by surface area and XRD measurements, were checked for their total surface acidity (Bronsted and Lewis) by pyridine titration and also tested for their catalytic activity towards the isopropanol dehydration. It was found that for the Al100PxAl20 solids the surface density of the acid sites increases on addition of phosphorus in a fairly regular manner. Substitution of some Al by Cr or Fe blurrs the picture of increasing acidity described above. The catalytic activity for isopropyl alcohol dehydration, calculated as the number of molecules decomposed per acid site per second, shows a minimum at x= 18–36 for Al100PxAl20 and Al100PxFe20, while for Al100PxCr20 a continuous increment with x is observed. The activity minima of the first two sets of solids coincide with the total absence of crystallinity as detected by XRD measurements. On the contrary, the continuous increment of activity for the Cr-containing catalysts is related to the presence of crystalline α-Cr2O3. This behaviour is attributed to competition between the diffusional and chemical steps controlling the reaction's process. On the amorphous solids, where high values of activation energy and decreased activity are observed, the chemical reaction seems to be the slow and rate-determining step, while diffusion is fast because of the large porosity of the solids. The other samples show activation energies that are half those of the amorphous solids and larger activities. The controlling step in these cases seems to be diffusion, a fact related either to smaller pores or larger rate constants.

Improved emulsifying preparation

Abstract: Emulsifying preparation includes a surfactant consisting of an ammonium quaternary compound and a higher alcohol, such as lauryl alcohol, capryl alcohol and so on in mixture with a lower mono- or bi-hydric alcohol, such as isopropyl alcohol or ethyl alcohol or hexylene glycol. This emulsifying preparation is used to quick emulsify, in cold conditions, thermolabile substances and particularly cosmetic products, such as creams, suspensions, lotions, dyeings and so on.

Dissociation constants of sore anti‐inflammatory agents (α‐phenylpropionic acids) in lsopropyl and tert‐butyl alcohol media

Abstract: The pKa of several α-phenylcarboxilic anti-inflammatory drugs in both isopropyl and tert-butyl alcohols have been determined by means of potentiometry. The dissociation constant values of their tetrabutylammonium salts, which are necessary for computation of the acidity constants, have been determined conductometrically. The results show that both the drug acid strength resolution and the pH break in titration curves are greater in tert-butyl than in isopropyl alcohol, but both alcohols can be used in everyday titrations. Titrations in one commercial pharmaceutical preparation have been carried out successfully.

Biodegradable disinfectant containing anhydrous alcohol and propylene glycol

Abstract: A non-toxic, non-corrosive, biodegradable disinfectant for use against various pathogenic organisms comprising a homogeneous composition of interactive constituents including anhydrous alcohol, in particular, isopropyl alcohol, propylene glycol, maskant and inert ingredients wherein the propylene glycol reduces the surface glaze formed by the anhydrous alcohol and surface tension formed by water or water-based body fluids enabling the disinfectant to rapidly contact the pathogenic organisms.

Freezing-preventive composition

Abstract: PURPOSE:To obtain a composition preventing freezing on wall face or glass window, etc., and quickly and readily defrosting ice on the frozen surface comprising aqueous solution containing specific amount of water-soluble organic liquid comprising respectively specific lower alcohol and polyhydric alcohol. CONSTITUTION:(A) 100 pts.wt. at least one species of alcohol selected from methanol, ethanol and isopropyl alcohol is mixed with (B) an aqueous solution containing 35-55wt.% water-soluble organic liquid comprising 30-100 pts.wt. ethylene glycol and/or propylene glycol as essential ingredient to afford the aimed composition. Besides, as water-soluble organic liquid other than the component A and the component B, diethylene glycol, triethylene glycol, glycerin, methyl cellosolve, ethyl cellosolve, butyl cellosolve and dioxane are exemplified.

Cleaning and disinfecting composition

Abstract: Cleaning and disinfecting composition for domestic use, characterised in that it comprises, in combination, ethoxylated fatty alcohol, a cosurfactant, isopropyl alcohol, polyhexamethylene biguanide hydrochloride, didecyldimethylammonium chloride and benzalkonium chloride.

Production of staple fiber having ultra-high water-absorptivity

Abstract: PURPOSE:To obtain a staple fiber having ultra-high water-absorptivity by using a uniform solution containing water, isopropyl alcohol and a surfactant as a reaction solvent in the carboxymethylation of a cellulosic fiber in the presence of an alkali metal ion. CONSTITUTION:Cellulosic staple fibers are charged in e.g. an Overmaier system dyeing machine and treated with a reaction solvent composed of water, isopropyl alcohol and a surfactant and containing an alkali metal ion such as sodium hydroxide to proceed homogeneous reaction. Uniform carboxylation of the fiber is promoted by the use of monochloroacetic acid. The use of the reaction solvent is effective in improving the utilization efficiency of monochloroacetic acid, increasing the washing efficiency and giving uniform and high-quality staple fibers having ultra-high water-absorptivity. The fiber is suitable as disposable diaper, etc.

Hand-care film-forming solution for oil work

Abstract: PURPOSE:To provide the subject solution for forming hand-care films permitting to perform the same fine and dense works as those using bare hands and free from the adhesion of oils to the skins of the hands by compounding a hydroxypropyl cellulose, ethyl alcohol or isopropyl alcohol, water, a plasticizer, etc., in a specific ratio. CONSTITUTION:A hand-care film-forming solution for oil works comprises as a basic composition 10-20wt.% of hydroxypropyl cellulose, 50-80wt.% of an alcohol such as ethyl alcohol or isopropyl alcohol, 0-40wt.% of water and <=3wt.% of a plasticizer (e.g. glycerol) as a basic composition. When the solution is coated on hand, a film is formed on the hand. The skin of the hand does not directly contact with an oil on a work and the film can be readily washed out after the work, thereby permitting to simply and readily prevent the staining of the hand skin the oil. Since the film is highly thin and useful, the same work effects as those using bare hands can be expected also for dense works requiring finger tips.

Powder aerosol cosmetic

Abstract: PURPOSE:To obtain the title cosmetic having excellent reproducibility of powder and good utility without using a fluorocarbon gas as a propellant, containing inorganic or organic powder, clay minerals, lower alcohol and liquefied petroleum gas in a specific ratio. CONSTITUTION:The objective cosmetic comprising (A) 0.1-10wt.% inorganic powder such as titanium oxide mica or talc and/or organic powder such as nylon powder, silk powder or cellulose powder, (B) 0.1-3.0wt.% clay minerals such as montmorilonite, saponite or hectorite, (C) 1-60wt.% lower alcohol such as ethyl alcohol or isopropyl alcohol and (D) 98.8-27wt.% liquefied petroleum gas such as propane, n-butane or isopentane. The cosmetic has excellent hidroschesis effect and deodorizing effect, refreshing touch in use and dryness.

Production of aluminum alkoxide

Abstract: PURPOSE:To obtain a compound useful as organic synthetic catalysts, dehydration condensing agents, surface treating agents, etc., at a remarkably improved reaction rate by carrying out solid-liquid reaction of metallic aluminum with an alcohol in the presence of a specific minor component. CONSTITUTION:Metallic aluminum and an alcohol are subjected to solid-liquid reaction in the presence of gallium or indium or a compound of the aforementioned metal at 0.02-50ppm, preferably 0.1-40ppm gallium or indium expressed in terms of the metallic concentration based on a reaction liquid phase in contact with the metallic aluminum to afford the objective substance. The alcohol forming the liquid phase is a 1-8C monohydric alcohol and isopropyl alcohol, etc., are used. The resultant compound is useful as additives for modifying coatings, inks, adhesives, etc., and raw materials for water repellents, functional glass, alumina-based fine ceramic powder, etc.

Low water content semi-solid ethanol based fuel

Abstract: A solid or semi-solid fuel having an approximate formulation of 81% to 93% ethanol, 8% to 3.5% stearic acid, 1.5% to .25% of 50% solution of sodium hydroxide; and 0% to 7% methanol or isopropyl alcohol used to denature the ethanol.

Method for purifying diisopropyl ether

Abstract: PURPOSE:To continuously obtain high purity diisopropyl ether with excellent economic efficiency by adding isopropyl alcohol or acetonitrile to diisopropyl ether and carrying out purification and distillation of the diisopropyl ether. CONSTITUTION:Isopropyl alcohol(IPA) or acetonitrile in an amount of 0.5-20vol.% based on diisopropyl ether(IPE) prepared in a synthetic system is added thereto to carry out distillation preferably by a two-column method and afford high purity IPE. A mixture solution of the raw material IPE with an azeotropic solvent is fed to an intermediate plate 4 of the first distillation column having 35-40 actual number of plates and distilled at 65-67 deg.C column top temperature, 70-72 deg.C column bottom temperature and 20-30 reflex ratio to distill hexenes which are impurities as an azeotropic mixture solution from a line 5. The IPE and high boiling substances are then fed from a line 6 to an intermediate plate of the second distillation column to afford the high purity IPE from a line 10. The IPE containing the high boiling substances is obtained from a line 11, redistilled and subsequently recrycled to the synthetic system.

Simultaneous Activation and Deactivation Phenomena in Isopropyl Alcohol Dehydrogenation on A Cu/Sio2 Catalyst

Abstract: Summary A kinetic model for simultaneous activation and deactivation processes in solid catalysts has been applied to kinetic data obtained in isopropyl alcohol dehydrogenation on a Cu/SiO2 catalyst. The influence of different catalyst pretreatments on the relevant kinetic parameters of the system has been investigated.

Composition for forming surface protective film

Abstract: PURPOSE:To obtain the subject composition, composed of a specific (meth)acrylic acid ester monomer or oligomer and a low-boiling solvent therefor, having a high hardness without causing cracks, etc., by bending etc. CONSTITUTION:The objective composition composed of (A) an acrylic or methacrylic acid ester monomer or oligomer having =3 (preferably >=5) acrylic functionality and (B) a low-boiling solvent such as ethanol, toluene, ethyl acetate, methyl cellosolve, acetone, methyl isobutyl ketone, methyl ethyl ketone, ethyl cellosolve or isopropyl alcohol. The aforementioned composition is applied to the surface of a substrate such as an optical card or flexible disk and then cured by exposure to ionizing radiation.

Aqueous dispersion detergent

Abstract: PURPOSE:To obtain the subject detergent excellent in detergency, free from remaining water on the surface of a washed material after washing and capable of abandoning to a water closet by impregnating a crepe paper produced by papermaking a raw material of a specified composition with an aqueous lower alcohol solution as a detergent. CONSTITUTION:A raw material containing (A) 98-94wt.% paper stock composed of wood pulp and viscose rayon, (B) 2-6wt.% binder consisting of PVA fiber soluble in a hot water of 50-60 deg.C and (C) a stabilizing agent consisting of an epoxy-modified polyamidopolyamine resin in an amount of 0.005-0.02wt.% based on the component (A) is subjected to papermaking. The resultant crepe paper is impregnated with an aqueous alcohol (preferably ethanol or isopropyl alcohol) solution as a detergent, thus obtaining the objective detergent. The above- mentioned component (C) is recommendably obtained by reacting epichlorohydrin with a secondary amine-containing polyamide.

Falvorings for tobacco and preparing method thereof

Abstract: A tobacco flavoring material is prepd. by reacting tobacco extract with sacchrides (i.e. at least one or two of glucose, fructose, sucrose, maltose and xylose) contg. carbonyl group in the poresence of solvents (i.e. at least one or two of propylene glycol, glycerine and benzyl alochol) or water at 80-180 deg.C for 1- 10 hrs. The tobacco extract is prepd. by (a) mixing tobacco leaves or its by- products, and organic solvent (i.e. ethanol or isopropyl alcohol) or water, (b) extracting at 100 deg.C or less, and (c) concentrating to Brix 50 or less at 100 deg.C or less under vacuum.

Additive for dampening solution for lithographic plate and stock dampening solution

Abstract: An additive for dampening solution, comprising a readily water-soluble glycol monoalkyl ether and a minute amount of a fluoroalkylated nonionic surfactant. Dampening solution can be prepared by using this additive without the necessity for using isopropyl alcohol at a dampening solution supply efficiency (FSE) equal to the one attained by using isopropyl alcohol.

Ultraviolet-coloring ink composition for skin marking

Abstract: PURPOSE:To improve adhesion to the skin, water resistance, and perspiration resistance by incorporating a specific solvent, a fluorescent brightener soluble in the solvent but insoluble in water, and a resin. CONSTITUTION:A solvent is prepared which is at least one of ethyl alcohol, isopropyl alcohol, and n-propyl alcohol. In 200-2,000 pts.wt. this solvent are dissolved 1-200 pts.wt. fluorescent brightener which is soluble in the solvent but water-insoluble, 100 pts.wt. resin soluble in the solvent but water-insoluble, a plasticizer, an ultraviolet absorber, a thickener, an antioxidant, a sensitizer, etc., and, if necessary, 2-6,000 pts.wt. drying rate regulator. Thus, an ink composition having a viscosity of 50 cP or lower is obtained.

Reactive microgel-water glass composite and its preparation

Abstract: PURPOSE:To prepare an org-inorg composite comprising a transparent aq sol having a suitable viscosity and good adhesive properties and useful for a coating material, etc, by mixing a reactive acrylic microgel having a hydrophilic functional group with ethyl orthosilicate in the presence of a lower alcohol CONSTITUTION:A reactive acrylic microgel having a functional group such as hydroxyl, carboxyl, glycidyl, methylol, or isopropyl is mixed with ethyl orthosilicate [tetraethoxysilane, Si(OC2H5)4] in the presence of ethyl alcohol, isopropyl alcohol, etc, to give an inorg-org composite comprising a transparent aq sol The resulting composite, when dried at room temp, forms a water- and solvent-resistant film having a high initial modulus, a high impact strength, and a uniform quality; when heated at 140 degC or higher, the composite forms a coating film having high performances

Production of n-long-chain acyl acidic amino acid

Abstract: PURPOSE:To advantageously obtain the subject compound useful as a detergent, emulsifying agent, etc., without emitting malodor and forming by-products by using a specific mixed solvent in reacting an acidic amino acid with a long-chain fatty acid halide in the presence of an alkali. CONSTITUTION:An acidic amino acid (e.g. glutamic acid) is reacted with a long-chain fatty acid halide (e.g. a halide of myristic acid) in the presence of an alkali such as sodium hydroxide using a mixed solvent of a mixed organic solvent of at least two hydrophilic organic solvents (preferably a mixture of ketones with lower alcohols, especially a mixture of acetone with isopropyl alcohol) and water to afford the objective compound. Furthermore, the mixing volume ratio of the aforementioned ketones to the lower alcohols is (80:20)-(20:80), especially (60:40)-(40:60) and the volume ratio of the mixed organic solvent to the water is (80:20)-(20:80), especially (60:40)-(40:60).

Comparison of acute toxicity of several organic solvents estimated by the values of LD50 and LC50.

Abstract: Introduction We have obtained the lethal dose 50 (LD50) or the lethal concentration 50 (LC50) of several organic solvents in acute toxicity experiments. Though there have been rather many reports of the LD50 of organic solvents by oral administration, few have been made of the LD50 by intraperitoneal administration (IP), Few reports also have been made of the LC50 of organic solvents. In the present study, we compared the acute toxicity estimated by the values of LD50 (IP) and/ or LC50 of 1,1,1-trichloroethane, styrene, tetrahydrofuran and isopropyl alcohol, on the basis of our experimental data so far reported including unpublished one.1-6)

Catalytic conversion of isopropyl alcohol on pure and alkali doped samarium oxide

Abstract: The catalytic conversion of isopropyl alcohol (IPA) on pure and alkali doped Sm 2 O 3 (10 mole %) was studied in flow system. The reaction is mainly dehydration-dehydrogenation of IPA. The results revealed that, the reaction products are strongly affected by the nature of employed carrier gase. The reaction in oxygen showed the highest activity and selectivity compared to other carriers. The doping process caused a significant decrease in the activity and selectivity of Sm 2 O 3 solids. Probable mechanistic routes for the dehydration and dehydrogenation processes are proposed.