Isopropyl alcohol

About: Isopropyl alcohol is a research topic. Over the lifetime, 3064 publications have been published within this topic receiving 27354 citations. The topic is also known as: Rubbing Alcohol & Propan-2-ol.

Method of determining acid and water in oil

Abstract: A method of measuring water in used oils, comprising the steps of placing a measured volume of a test solution into a first container, the first container being of a known volume when filled to overflow; placing a measured volume of test solution into (2 pouring the measured volume of (98 the first container into the second container; filling the first container to overflow with the oil being tested; pouring the measured volume of oil from the first container into the second container, the second container being of a volume large enough to accommodate the measured volumes of test solutions and oil, shaking the second container, introducing an additional measured volume of oil being tested into the second container so that the resultant solution separates into two phases to indicate the percentage by volume of water in the oil. The test solution in one container is a neutralizer solution including an alkali such as sodium hydroxide or potassium hydroxide, an alcohol such as ethyl alcohol, isopropyl alcohol or methyl alcohol and a small amount of water. The test solution in the other container is an indicator solution including an aromatic hydrocarbon such as benzene or toluene, an alcohol such as ethyl alcohol, isopropyl alcohol or methyl alcohol, and an indicator such as phenol red, phenolphthalein, cresol red, bromthymol blue, congo red, chlorophenol red or orange I. The percentage of aromatic hydrocarbon by volume in the indicator solution is about two percent (2 percent) to about ninety-eight percent (98 percent) of the combined volume of aromatic hydrocarbon, alcohol and indicator.

Method of preparing transfer elements

Abstract: 1,164,027. Coating compositions for carbon papers. COLUMBIA RIBBON & CARBON MFG. CO. Inc. 7 Feb., 1967, No. 5753/67. Heading C4A. [Also in Divisions C3 and D2] In the examples, coating compositions for pressure-sensitive transfer elements comprise: (I) zein, lanolin, mineral oil, oleic acid, carbon black, alkali blue, lecithin, toluol, wetting agent, isopropyl alcohol and water; and (IV) zein, starch, oleic acid, lanolin, carbon black, nigrobine, methyl ethyl ketone, wetting agent, isopropanol and water. The wetting agent in each case is a polyoxyalkylene derivative of a partial ester of hexitol anhydride and a longchain fatty acid, but reference is also made to sodium diisopropylnaphthalensulphonate.

Kinetics of 2,2′‐Bipyridyl‐Catalyzed Oxidation of Isopropyl Alcohol with Chromic Acid

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.