METHOD OF SEPARATING MONOCHLOROACETIC ACID AND DICHLOROACETIC ACID BY EXTRACTIVE DISTILLATION Russian patent published in 2016 - IPC C07C51/44 C07C51/46 C07C51/48 C07C53/16 

FIELD: chemistry.

SUBSTANCE: invention relates to separation of monochloroacetic acid and dichloroacetic acid one from another by extractive distillation, including steps of (i) bringing a mixture containing monochloroacetic acid and dichloroacetic acid into contact with an extraction agent, which is chemically stable and which has affinity to BF₃ between 65 kJ/mol and 110 kJ/mol, (ii) distillation of mixture to obtain a stream of monochloroacetic acid and a stream containing dichloroacetic acid and extraction agent, and (iii) regeneration of extraction agent.

EFFECT: achieving good separation and extraction agent can be regenerated relatively easily.

14 cl, 6 tbl, 3 ex