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.

Improvements in or relating to fluorescent coating compositions

Abstract: A fluorescent coating composition comprises a volatile organic solvent solution of at least one synthetic resinous condensation product in physical or chemical combination with at least one fluorescent dye, and at least one finely-divided solid light diffusing medium (extender), preferably having a particle size not greater than 2 microns and a refractive index not differing from that of the resin by more than 15 per cent, the resin constituting at least 35 per cent by weight of the composition, and the dye being in a proportion not exceeding that at which optimum brightness is achieved The dye-resin combination may be formed, eg by adsorption, solvation or by ester formation between a carboxylate group in the dye and a hydroxyl group of the resin The compositions may be made by dissolving the resin(s) in a solvent or solvent mixture, adding the dye(s) thereto and heating; the extender(s) is then stirred in and the mixture further heated Ingredients specified are:-Fluorescent dyes-4 - amino - 1 : 8 - naphthalic acid - 41 - phenylanilide sodium sulphonate, 4-amino-1 : 8-naphthalic acid-41-methylanilide, 4-amino-1 : 8-naphthalic acid - cyclohexylamide, 3 : 6 - diamino - acridine methochloride hydrochloride, dimethyl dehydrothiotoluidine - methochloride, 3 : 6 - bisethylamino - 9 - (21 - carbethoxy - phenyl) - xanthenyl - chloride, 3 : 6 - bis - diethylamino - 9 - (21 - carboxyphenyl) - xanthenyl chloride, 3 : 6 - bis - diethylamino - 9 - (21 - sulphophenyl)-xanthenyl sodium sulphonate Non-fluorescent dyes and pigments may also be added: resins-glyceryl phthalate (modified and unmodified), alkylated (eg butylated) urea-formaldehyde, alkylated (eg butylated) melamine-formaldehyde, cyclohexanone - aldehyde, epoxide, sulphonamide-aldehyde and polyurethane (eg toluene diisocyanate and butylglyceryl phthalate) resins Other resinous materials which may be added are nitro-, acetyl-, ethyl-, benzyl-, acetyl-butyryl- and acetyl-propionyl-celluloses; polymethacrylate, polyvinyl - acetate and -chloride, polyvinylidene chloride and their copolymers; extenders-silica, magnesia, alumina, powdered urea- and melamine-formaldehyde resins, mica, china clay, rice starch and acetylated starch; solvents-diacetone alcohol, ethyl acetate, butyl acetate, ethyl lactate, acetone, methyl isobutyl ketone, white spirit and butanol-xylene mixture Cobalt and lead driers or acid catalysts such as phosphoric and p-toluene sulphonic acids may be added to the compositions Examples are given Specification 456,480 is referred to

Biofiltration of paint solvent mixtures in two reactor types: Overloading by polar components

Abstract: Steady-state performances of a trickle bed reactor (TBR) and a biofilter (BF) in loading experiments with increasing inlet concentrations of polar solvents, acetone, methyl ethyl ketone, methyl isobutyl ketone and n-butyl acetate, were investigated, along with the system's dynamic responses. Throughout the entire experimentation time, a constant loading rate of aromatic components of 4 gc·m−3·h−1 was maintained to observe the interactions between the polar substrates and aromatic hydrocarbons. Under low combined substrate loadings, the BF outperformed TBR not only in the removal of aromatic hydrocarbons but also in the removal of polar substrates. However, increasing the loading rate of polar components above the threshold value of 31–36 gc·m−3·h−1 resulted in a steep and significant drop in the removal efficiencies of both polar (except for butyl acetate) and hydrophobic components, which was more pronounced in the BF; so the relative TBR/BF efficiency became reversed under such overloading conditions. A...

Treatment of waste water from the preparation of 6-substituted 3-mercapto-4-amino-1,2,4-triazine-5-ones

Abstract: A process for the treatment of waste water obtained in the condensation of thiocarbohydrazide and an aqueous solution of an α-keto carboxylic acid such as, e.g., 3,3-dimethyl-2-oxo-butyric acid, which comprises mixing said waste water with a water-immiscible ketone, preferably selected from the group consisting of methyl isobutyl ketone, cyclohexanone and pinacolone, said ketone being employed in an amount sufficient to form two phases, separating said two phases, and discharging as waste the aqueous phase. Advantageously the pH of the waste water is no higher than about 6 and its temperature is 20° to 50° C. The organic phase comprises the ketone containing dissolved therein an adduct of the ketone with thiocarbohydrazide and/or similar amino materials originally present in waste water. The excess of the ketone may be recovered from the organic phase by distillation, or the organic phase may be treated with alkali to effect hydrolysis of such adducts, the ketone separated and recycled and the amino materials recovered.