FIELD: chemistry.
SUBSTANCE: invention relates to a method of removing cyclic diester of 2-hydroxyalkanoic acid from vapour comprising said diester in which vapour is contacted with an aqueous solution, so that diester is dissolved in said solution. In method according to present invention, solution is an alkaline solution, preferably having a pH above 10. Problem of formation of diester suspensions in aqueous solutions can be prevented by present invention. Method can be used to great advantage in production or conversion of lactide.
EFFECT: method of removing cyclic diester of 2-hydroxyalkanoic acid from vapour.
13 cl, 1 dwg
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