Method and apparatus for preparation of lactide using lactide purification process

摘要

The present invention relates to a kind of method and apparatus, it is used to produce and use the lactide of a lactide purification process. More specifically, if it is a kind of method, for producing lactide comprising: a step is used to execute after the injection of aqueous lactic acid feed solution and is reacted into a reactor that catalyst is housed, to generate lactide steam; First purification step is used to produce lactide cedryl acetate by cleaning lactide steam. First purification step further comprises: a step is used to produce lactide cedryl acetate, by capturing and being crystallized using the lactide steam of the first solvent; One step is used for from residue to being separated by filtration lactide cedryl acetate.