Showing papers on "Isopropyl alcohol published in 1969"

Stimulation of Gastric Acid Secretion by Irrigation of the Antrum with Some Aliphatic Alcohols1

Abstract: Ethyl alcohol is known to stimulate gastric acid secretion in fundic pouch dogs during irrigation of the antrum. A comparison was made with regard to such an effect of a series of aliphatic alcohols including methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl and tert-butyl alcohol. Dogs provided with a Heidenhain or a Pavlov pouch and isolated, innervated antral pouch were used. The only alcohol besides ethanol that showed a potent stimulatory effect was n-propyl alcohol. All other alcohols tested had an effect less than half of that of ethanol. A change from one stimulatory alcohol to the corresponding isocompound caused a marked decrease of the effect. Isopropyl alcohol, one of the “non-stimulatory” aliphatic alcohols, did neither show a synergistic nor an inhibitory action on the effect of ethyl alcohol or n-propyl alcohol during simultaneous administration, indicating almost no interference with gastrin release mechanisms. n-Propyl alcohol together with ethyl alcohol showed a dose-response related action. Methyl alcohol was almost inactive. The results indicate that the stimulatory effect of alcohols could not be related to water or fat solubility but to the molecular configuration.

Cleaning composition for pet stains

Abstract: A composition for removing pet stains from carpets and the like comprising 10 to 14 parts by weight of butyl cellosolve, 5 to 15 parts of isopropyl alcohol (or ethyl alcohol), about one to three parts of a 3.5 percent solution of hydrogen peroxide, about onequarter to two parts of ethylene diamine tetracetic acid and 103 parts of water.

The transmission of polar effects. Part X. The esterification with diazodiphenyl-methane and the ionization of 9-substituted 10-anthroic and 8-substituted 1-naphthoic acids

Abstract: The rate coefficients for the reaction with diazodiphenylmethane in methanol, ethanol, isopropyl alcohol, t-butyl alcohol, 2-methoxyethanol, 2-n-butoxyethanol, and ethyl acetate at 30° and the pKa values in 80% 2-n-butoxyethanol–water of a series of 9-substituted 10-anthroic and 8-substituted 1-naphthoic acids have been determined. The effect of substitution has been analyzed by linear free energy relations. The variation in the susceptibilities of the systems to polar substituent effects with the medium are examined. The occurrence of reversed dipolar substituent effects in the reactions of the 1,8-naphthoic acids is detected. The implications of the results for the inductive and field effect models for the transmission of polar effects are discussed.

Method for the production of tertiary-butyl hydroperoxide

Abstract: Method for increasing the selectivity of liquid phase isobutane oxidation for the production of tertiary-butyl hydroperoxide by introducing small amounts of either isopropyl alcohol, secondary butyl alcohol or isobutyl alcohol into the reaction zone.

Ultrasonic absorption properties of solutions. Part 7.—Mixtures of water + substituted alcohols

Abstract: The ultrasonic absorption properties are reported for alcohol + water mixtures where the alcohol is 2-chloroethanol, 2-bromoethanol, 2-cyanoethanol, allyl alcohol, ethane-1 : 2-diol, propane-1 : 2-diol, propanel-1 : 3-diol, butane-1 : 4-diol and pentane-1 : 5-diol. The glycols and 2-cyanoethanol show little if any excess absorption but the three mixtures, water+2-bromoethanol, allyl alcohol + water and chloroethanol + water have intense excess absorptions which, for the latter two systems, have been analysed using two relaxation frequencies. The dependence of the derived relaxation frequencies on composition and temperature are similar to those previously reported for aqueous mixtures containing t-butyl alcohol, n-propyl alcohol and isopropyl alcohol and it is suggested that the controlling factor is bulk water structure.

Dehydrogenation of alcohols to ketones

Abstract: A Group VIII metal containing pyrolyzed polyacrylonitrile polymer catalyst and hydrocarbon conversion process for the dehydrogenation of alcohols to ketones particularly isopropyl alcohol to acetone and the hydrogenation of nitro compounds to amines, particularly 2-nitropropane to isopropyl amine by the use of said catalyst.

Photoreduction of aromatic ketones by amines in aqueous and alcoholic solution

Abstract: Photolysis of fluorenone in an ethanolic solution of triethylamine and of benzophenone in aqueous and alcoholic solutions of isobutylamine and t-butylamine gave the radical-anion of the ketone which was, in each case, characterised by esr With fluorenone, the products included 9-hydroxyfluorene and 9,9′-bisfluorenyl-9,9′-diol Photolysis of benzophenone in aqueous and alcoholic solutions of a number of aliphatic amines usually gave 1,1,2,2-tetraphenylethane-1,2-diol 4-Phenylbenzophenone, and 2-acetylnaphthalene, on photolysis in ethanolic triethylamine, gave the corresponding diols Fluorenone is thermally reduced by solutions of sodium isopropoxide in isopropyl alcohol to give its radical-anion which subsequently gives 9-hydroxyfluorene

Improvements in and relating to the Electroplating of Tin-Lead Alloy

Abstract: 1,151,460. Electro-depositing tin-lead alloy. M. KANAI. Oct. 9, 1967, No.46019/67. Heading C7B. A bright Sn-Pb alloy is electro-plated on to an article immersed as cathode in a bath comprising a stannous and a lead salt e.g. fluoborate, and the reaction product of acetaldehyde and O-toluidine as a brightening agent. The bath may also contain an ether type non-ionic surface active agent, e.g. polyethylene glycol nonyl phenyl ether, to disperse the brightening agent, and hydroquinone as an antioxidant. Free fluoboric and boric acids, formaldehyde and #-naphthol may also be present. The reaction product is preferably extracted with isopropyl alcohol for adding to the bath. The surfaceactive agent may be obtained by adding ethylene oxide to nonyl phenol or isocytyl alcohol. The article may be slowly moved while plating.

Synthesis of Isopropyl Acetate from Isopropyl Alcohol and Acetaldehyde over Metallic Palladium Catalyst

Abstract: すでに報告したエタノールより酢酸エチル生成反応の反応径路を詳しく調べるため金属パラジウム触媒を用いてアセトアルデヒド,イソプロピルアルコール,酸素より酢酸イソプロピル生成反応について検討した。生成物は酢酸イソプロピル,アセトン,メタン,二酸化炭素であり,それらは並発的に生成することがわかった。本反応のモデルを次のように想定した。1)活性点(パラジウム金属)上への酸素の分子状吸着,2)アセトアルデヒドの解離吸着によるアシル-金属中間体の生成,3)イソプロピルアルコールの解離吸着によるアルコキシ-金属中間体の生成,4)吸着酸素,吸着アルデヒド,吸着アルコールの反応による酢酸イソプロピルの生成,5)吸着酸素と吸着アルコールの反応によるアセトンと水の生成,6)吸着酸素と吸着アルデヒドの反応によるメタンと二酸化炭素の生成。この反応モデルで4),5),6)が並発的におこり,かつ律速であるとして導出された次の速度式は104℃での実験結果とよい一致を示した。

H–D isotope effect in the reaction of hydrogen radicals with isopropyl alcohol in 6M-H2SO4 in the liquid and in the glassy state

Abstract: The kinetic isotope effect (kH/kD) for the hydrogen abstraction from (CH3)2CHOH and (CD3)2CDOH by hydrogen atoms in 6M-H2SO4 is 10·1 at 299°K, 18·1 at 253°K, and only 2·2 at 90°K, indicating that at 90°K the reaction is mainly diffusion controlled.

Photoinduced Reactions. XXXIII. Photochemical Reaction of a para-Quinone Methide

Abstract: The photochemistry of a quinone methide (Ia) was investigated. Ia was unchanged on photolysis of an alcoholic solution (0.0064 M) with a high-pressure mercury lamp (Pyrex filter). However irradiation of a highly dilute solution of Ia or a sensitized reaction (acetophenone) gave an alcohol adduct (IIe in methanol and IIf in isopropyl alcohol) which might be formed via triplet excited state(s) of Ia. The methanol adduct IIe was also formed by the irradiation of Ia in methanol with a low-pressure mercury lamp through quartz. In this case the formation of He appears to be initiated by photochemical decomposition of methanol.

Preparation of a ketone and an aldehyde,by carbonylation of an olefin in the presence of a secondary alcohol

Abstract: The invention comprises a preparation of a ketone and an aldehyde by contacting a hydrocarbon olefin, carbon monoxide and a secondary alcohol with a liquid reaction medium and in the presence of a Group VIII noble metal, preferably under basic conditions. A typical reaction comprises contacting ethylene, carbon monoxide and isopropyl alcohol with a reaction medium comprising rhodium trichloride to produce acetone and propionaldehyde.

METHOD OF ISOLATING d-XYLOSE FROM HARDWOOD SULPHITE LIQUOR

Abstract: D-Xylose is isolated from hardwood sulphite liquor by means of azeotropic isopropyl alcohol.

Treatment of glass containers

Abstract: Glass containers are produced by forming the containers in a forming machine, spraying the containers while still hot with a solution or dispersion of a tin compound in an organic solvent, and subjecting the containers while still hot to annealing. Containers are produced which have not only a surface coating of tin oxide but also a proportion of tin compound, possibly tin oxide, diffused into the surface layers of the glass. The tin compound may be a stannic compound e.g. derived from stannic chloride. The organic solvent may be an alcohol having up to 6 carbon atoms in the molecule e.g. isopropyl, methyl, ethyl or n-propyl alcohol or a mixture thereof. The solution may comprise 80 to 95% by weight of the alcohol and 5 to 20% by weight of the tin compound e.g. 90% by weight isopropyl alcohol and 10% by weight stannic chloride. The tin compound may be applied in combination with a modifier having the effect of improving the resistance of the coating to attack by alkaline reagents without affecting any of its other properties. The modifier may be present in an amount not exceeding 10% by weight of the tin compound and may be titanium tetrachloride, titanium tetra-n-butoxide, bismuth trichloride, or a mixture thereof. A preferred solution comprises 90% by weight isopropyl alcohol, 9.5% by weight stannic chloride, and 0.5% by weight of the modifier specified above. The solution or dispersion may be applied in the form of a fine mist. The temperature of application may be at least 350 DEG C., e.g. between 400 DEG and 650 DEG C. The treatment may be performed in an apparatus which comprises an endless conveyer, and situated thereover a tunnel, the tunnel being provided with one or more atomizers linked to supplies, respectively, of air under pressure and the solution or dispersion of a tin compound in an organic solvent. The containers may be formed on a forming machine, immediately transferred to an endless conveyer, treated with the solution or dispersion, and transferred from the conveyer to an annealing lehr.

The Isotope Effect of Hydrogen on the Autoxidation of Benzene and Toluene in Aqueous Solutions

Abstract: The effect of organic additives on the autoxidations of benzene and toluene was studied at 180°C in a ferrous sulfate aqueous solution. The additives were benzene, toluene, ethylbenzene, cumene, cyclohexene, cyclohexane, n-hexane, t-butyl alcohol, isopropyl alcohol, and ethyl alcohol. The yields of the phenol and benzaldehyde produced were measured as functions of the initial volume fraction of the additive. The yields decreased with the addition of a trace of the additive, and the yields increased still more with further addition. In order to interpret these results, the general expression for the yield of the main product was derived by the Gale-Wagner method and was analyzed numerically by using the IBM 7044. The mole fraction of the additive, corresponding to the maximum yield, can give information regarding the relative reactivity of the additive as compared with the results of the above numerical analysis. It is concluded from the present study that the experiment of the flow system for the autoxida...

Improvements in or relating to Electroplating Aluminium with Copper or Chromium

Abstract: 1,172,765. Electro-plating. GAF CORP. April 17, 1967 [April 18, 1966; July 5, 1966], No.17588/67. Heading C7B. One side of an Al sheet or plate, the surfaces of which have been rendered oxide-free e.g. by dipping in NaOH solution, is provided with a Cu or Cr coating, e.g. to serve as a support for a light-sensitive, resist-forming layer for photomechanical printing plates, by flow-coating the other side with a protective alkaline-soluble, adhesive acrylic resin layer, immersing the coated sheet or plate as the cathode in an acid Cu or Cr plating bath, e.g. of the copper cyanide, sulphate, fluoborate or pyrophosphate type, and after withdrawal and preferably rinsing, removing the resin layer with an alkaline medium (pH at least 7A5) e.g. by swabbing with a pad soaked in ammonium or alkali metal hydroxide or Na 3 PO 4 solution. The resin contains on a molar basis 80-99% acrylate units, e.g. a mixture of methyl, ethyl and butyl acrylate, and 1-20% (meth) acrylic acid units, and may be applied as a solution in isopropyl alcohol, methanol, ethanol, acetone, diacetone alcohol, dioxane, cyclohexanol or ethyl acetate, with oleic acid and a surface-active agent.