RE-ESTERIFICATION METHOD Russian patent published in 2012 - IPC C07C67/10 C07C69/54 C07C67/62 B01D3/14 B01J31/06 B01J31/10 

FIELD: chemistry.

SUBSTANCE: apparatus for re-esterification of organic acid with ester has a fixed-bed catalytic reactor and a distillation column, where the pipe between the reactor and the distillation column is fitted with pressure increasing apparatus, and the head of the distillation column is connected to a phase separator which is in turn connected to said reactor, and flow to the reactor passes through a heat exchanger for regulating reaction temperature. The re-esterification method involves the following steps: A) mixing organic acid a) with ester b) and B) transfer of the alcohol residue of the ester b) to the acid a), accompanied by formation of an ester of acid a) and an acid of ester b), where the transfer of the alcohol residue of the ester b) to the acid a) at step B) is carried out in the apparatus described in claim 1. Reactants are fed into the distillation column to carry out re-esterification in the fixed-bed catalytic reactor lying outside the column; a portion of the liquid phase flowing downwards inside the distillation column is trapped and output from the column in form of a separate stream whose pressure is raised using the pressure increasing apparatus and its temperature is controlled in the heat exchanger before being fed into the reactor; the stream coming out of the reactor is fed into the distillation column where the mixture of reaction products is separated and the stream coming out of the top of the column is separated in the phase separator.

EFFECT: reduced expenses.

11 cl, 1 dwg, 2 tbl, 38 ex