METHOD OF CONTINUOUS PRODUCTION OF DIALKYLCARBONATE AND ALKYLENEGLYCOL Russian patent published in 2014 - IPC C07C69/96 C07C68/06 C07C68/08 C07C29/128 C07C27/02 C07C31/20 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of continuous obtaining of dialkylcarbonate of formula (I): (R¹O)₂CO (I), in which R¹ stands for a non-branched or branched alkyl with 1-4 atoms of carbon, and alkyleneglycol of formula (II): R²(OH)₂ (II), in which R² stands for an alkyl with 2-4 carbon atoms, by the realised in the presence of a catalyst re-etherification of cyclic alkylenecarbonate of formula (III): (III): R¹OH (III), in which R¹ is such as given above, with the re-etherification being realised in a column in a counter-flow mode, with cyclic alkylenecarbonate (1) being supplied into an upper part of the column, and dialkylcarbonate-containing alcohol (3) - into its middle or lower part, and below the place of supply of dialkylcarbonate-containing alcohol other place of the alcohol-containing flow (4) supply is provided, with a ratio of distance between the place of alkylenecarbonate (1) supply and the place of dialkylcarbonate-containing alcohol (3) supply to the distance between the place of alkylenecarbonate (1) supply and the second place of alcohol (4) supply constitutes from 0.2 to 0.52.

EFFECT: method makes it possible to obtain products with the maximally low content of alkylenecarbonate.

13 cl, 4 ex, 1 dwg