METHOD OF SYNTHESIS OF ALKYLENE GLYCOL MONOALKYL ESTERS Russian patent published in 2000 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method of synthesis of monoalkyl esters of mono- and diethylene glycols (ethyl-, butyl-cellosolves and carbitols) and propylene glycol monomethyl ester that are used in production of solvents, plasticizers, components for low-freezing, deicers, hydraulic and hydraulic break liquids and for production of materials used in industry of plastics, pesticides, lacquers and dyes. Method of synthesis of alkylene glycol monoalkyl esters is carried out by interaction of ethylene and propylene oxides with alcohols at increased temperature and pressure and involves the use of organic compounds of metals of fifth and/or sixth group of periodic system of elements as catalyst, preferably organic compounds of vanadium, molybdenum and tungsten and more precisely: alkyl esters of corresponding to inorganic acids. Method provides high selectivity of process at decreased alcohol excess (by 4-8-fold) with respect to alkylene oxide, producing concentrated solutions of the end compounds (above 20 wt.-%). EFFECT: improved method of synthesis, decreased energy consumption. 1 cl, 2 tbl, 11 ex