Methyl isobutyl ketone

About: Methyl isobutyl ketone is a research topic. Over the lifetime, 2071 publications have been published within this topic receiving 26976 citations. The topic is also known as: Hexone & Isobutyl methyl ketone.

Production of carbonyl compound

Abstract: PURPOSE:To easily, stably obtain in high yield a carbonyl compound useful as a solvent or chemical feedstock by reacting an olefin with an oxidative gas under specified conditions. CONSTITUTION:An olefin is reacted with an oxidative gas in the presence of a palladium compound (e.g. PdSO4.2H2O), polyoxoanionic compound [e.g. (PV3Mo9O40) ] and iron-contg. compound [e.g. Fe2(SO4)3] in a solvent consisting of at least one kind of compound selected from oxygen-contg. compounds (e.g. 1,4-dioxane) and sulfur-contg. compounds (e.g. dimethylsulfoxide) or a mixed solvent compound of the compound (s) and water to obtain the objective carbonyl compound useful as a solve or chemical feedstock such as methyl ethyl ketone, methyl isobutyl ketone, acetone, cyclopentanone or cyclohexanone, or as a precursor for higher alcohols such as a ketone or aldehyde. For this reaction, catalytic activity deterioration can be prevented and reaction rate can be maintained stably at high levels without the need for separating reaction process from catalyst regeneration process.

Preparation of methyl isobutyl ketone

Abstract: Process for selective synthesis of methyl isobutyl ketone by reacting in vapor phase or vapor/liquid phase acetone and hydrogen, eg in 05-3:1 molar ratio at 150°-300° C and 1-30 atm, in the presence of a modified palladium-containing ZSM-5 zeolite catalyst, eg of 005-5% Pd content, as porous crystalline aluminosilicate catalyst having a 15-700:1 silica to alumina ratio, eg at a weight hourly space velocity of 05-8 hr-1, the catalyst being prepared by treating a completely acidic ZSM-5 zeolite sequentially with alkali metal cations and palladium ions and then activating the resultant zeolite in a reducing atmosphere

Gold in twenty six Japanese geochemical reference samples

Abstract: Gold has been determined in 26 geochemical reference samples with graphite furnace AAS after digesting the samples with aqua regia and hydrofluoric acid and extracting gold by methyl isobutyl ketone (MIBK). This method yields clearly higher values than those by the partial attack using aqua regia digestion.

Webbable, strippable coating composition

Abstract: A water- and moisture-proof coating composition which is sprayable, webbable across and strippable from many surfaces comprises vinyl chloride-vinyl acetate coplymer and vinylidene chloride-acrylonitrile copolymer dissolved in a volatile solvent. Alternatively, the composition may comprise a solution in a volatile solvent of vinyl chloride-vinyl acetate copolymers alone, the copolymers consisting of one copolymer having a vinyl chloride content of 85-90.5 per cent and another having a vinyl chloride content of 90.5 to 95 per cent. A preferred composition comprises 30 to 80 parts by weight of resin including up to 20 parts vinylidene chloride-acrylonitrile copolymer, a quantity of vinyl chloride-acetate copolymer having the higher vinyl chloride content which will dissolve in the quantity of solvent employed and vinyl chloride-acetate copolymer of the lower vinyl chloride content to make up the balance. The remainder, up to 100 parts, consists of plasticisers, stabilisers, and non-drying, hydrophobic substances. Specified solvents are methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone. Suitable plasticizers are p long chain dialkyl glycollates, diaryl glycollates, alkyl aryl glycollates, dialkyl phthalates, dialkyl sebacates and aryl substituted phosphates. Mineral oil may be added as an anti-corrosive non-drying agent and a suitable stabiliser consists of partial esters of polyhydric alcohols with unsaturated fatty acids. Examples are given of coated vehicles, guns, bomb-racks and projectiles thereby, webbing orifices of up to 20 ins. in diameter.

Spectrophotometric determination of cobalt in steel with 2-(2-thiazolylazo)-4-methyl-5-(sulfomethylamino) benzoic acid (TAMSMB)

Abstract: A method for the determination of cobalt in steel with 2-(2-thi-azolylazo)-4-methyl-5-(sulfomethylamino) benzoic acid (TAMSMB) is proposed. Iron and manganese were previously removed by the extraction from 7M HCl into methyl isobutyl ketone and with an anion exchange column (Diaion SA # 100), respectively. The results of the analyses of steel samples were in good agreement with those by atomic absorption spectrophotometry. This method was compared with the methods using the highly sensitive reagents for cobalt; 4-(5-chloro-2-pyridylazo)-1,3-diaminobenzene(5-Cl-PADAB), 5-(3,5-dibromo-2-pyridylazo)-2,4-diaminotoluene (3,5-diBr-PADAT), 2-(5-bromo-2-pyridylazo)-5-(diethylamino) phenol(5-Br-PADAP), 2-(2-py-ridylazo)-4-methyl-5-(ethylamino) phenol (EAPAC), 2-(3,5-dibromo-2-pyridylazo)-5-(dimethylamino) benzoic acid (3,5-di-Br-PAMB), 3-(2-thiazolylazo)-2,6-diaminotoluene (2,6-TADAT), and 2-nitroso-5-dimethylaminophenol (Nitroso-DMAP).