105 results about "Methyl lactate" patented technology

A water-soluble or water-dispersible carbodiimide compound is hydrophilicized by incorporating methyl glycolate or methyl lactate, which serves a moiety similar to the moiety which aqueous urethane resin, aqueous acrylic resin, or the like possesses, into an end of a starting carbodiimide compound. The invention provides a carbodiimide compound and a carbodiimide composition, which, when added as a cross-linking agent to aqueous resin, can enhance water resistance, solvent resistance, and adhesion of the resin, while maintaining the conventionally attained pot life, and an aqueous coating composition containing the carbodiimide compound or composition.

The dehydrated alkali metal salts of carboxylic acid are dissolved in the alcohol such as methanol or ethanol or butanol to make their solution in corresponding alcohol. The solution alcohol is further treated with carbon dioxide under pressure or at atmospheric pressure at elevated temperature such as 150 to 200° C. The carboxylic acid gets converted into corresponding alkyl ester and calcium carbonate or sodium carbonate or potassium carbonate as the byproduct. Calcium lactate or sodium lactate or sodium acetate or sodium benzoate or sodium salicylate as alkali metal salt solution prepared in methanol or ethanol or butanol when treated with carbon dioxide under pressure or at atmospheric pressure at elevated temperature gets converted to methyl lactate or ethyl lactate or methyl acetate or methyl benzoate or methyl salicylate as product.

The invention relates to 2-(1-ethoxyl).2-acetylthiazole-4-formamide compounds and application. The structural formula of the compounds is (I), wherein X refers to OH(BB series).=O(BA series); R2 refers to alkyl groups of C2 to C5, substituted or unsubstituted five-membered and six-membered rings including benzene ring, pyridine ring, furan ring, pyrrole ring, thiazole ring and pyrimidine ring; n refers to 0, 1 and 2. According to the invention, L-methyl lactate is taken as a starting raw material, and natural products like Bacillamidel,2 and 2-(1-ethoxyl) thiazole-4-formamide compounds BB series and 2-acetylthiazole-4-formamide compounds BA series are synthesized. The compounds have excellent algae killing activity on limnetic algae such as microcystis aeruginosa, chlorella pyrenoidosa and scenedesmus obliquus, and have the advantages of high yield, good stability, high activity and low pollution, can be easily degraded and are environment-friendly, and can be used as the potential commercial universal algicide. The formula refers to the Specification.

The present invention provides a commercially viable process for the preparation of highly pure and optically active L-(+)-lactic acid and S-(−)-methyl lactate, in high yield, obtained from esterification of aqueous crude lactic acid solution produced by sugar cane juice fermentation broth and methanol in continuous counter current trickle phase approach or in continuous counter current bubble column manner, using stabilizers and the methyl lactate so obtained is recovered and followed by purification of reasonably pure methyl lactate using reagent mixture such as sodium bi-carbonate, mono-ethanolamine or di-ethanolamine, urea or sodium-bicarbonate, mono-ethanolamine or di-ethanolamine, thiourea to reduce the impurity of dimethyl ester of dicarboxylic such as dimethyl oxalate or di-methyl succinate or methyl ester of mono-carboxylic acid such as methyl pyruvate present as an impurity, so as to get highly pure S-(−)-methyl lactate followed by hydrolyzing highly pure S-(−)-methyl lactate using highly pure lactic acid as a catalyst, using highly pure water as the hydrolysis media and by using pre-treated activated carbon with dilute L-(+)-lactic acid, in batch or continuous mode. This very high pure S-(−)-methyl lactate constitutes an important product having interesting possibilities of application at an industrial level, in pharmaceuticals. Highly pure L-(+)-lactic acid thus obtained is used as an acidulant, as a food additive, for pharmaceutical applications, a monomer for making poly-lactic acid, as a monomer to prepare biodegradable polymer which are useful for manufacturing bags, application films, in the field of sanitary field, and has medical applications.