Cleaning apparatus for separating from the mixture DILAKTIDA SUBSTANCES polymerization apparatus, method DILAKTIDA BRANCH OF MIXTURE OF SUBSTANCES AND APPLICATION METHOD AND DEVICE

摘要

FIELD: chemistry.;SUBSTANCE: present invention relates to a method of producing a biodegradable intermolecular cyclic diester of alpha-hydroxycarboxylic acid. The method involves feeding a mixture of materials into a purification apparatus fitted with a column with a dividing wall, dividing the mixture of materials and extracting the purified diester. Said purification apparatus has the following components: a fractionating column, an outlet opening, a mass-exchange cap, a column with a dividing wall which is divided into two zones by a vertical dividing wall, an additional mass-exchange cap, an evaporator and an outlet opening on the collector side. The ratio of the length of the column with a dividing wall to the total length of the purification apparatus range from 0.5 to 0.9.;EFFECT: method enables cheap and efficient separation of diester from mixtures of materials when producing diester with high purity of material and/or optical purity.;19 cl, 9 dwg, 9 ex