| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to an improved method of purifying unsaturated compounds from a group of glycol esters, wherein purification is carried out in an apparatus which is equipped with at least two evaporators, the evaporators being connected such that a portion of an unsaturated compound circulates on a loop, wherein vapours condensed after evaporation in a first evaporator are removed and vapours condensed after evaporation in a second evaporator are fed into the first evaporator, the method being characterised by that mass flow with which vapours condensed after evaporation in the first evaporator are removed from the mixture to be purified is less than the mass flow with which vapours condensed after evaporation from the second evaporator enter the first evaporator.EFFECT: purification method enables to obtain especially pure product with high output.23 cl, 1 dwg, 6 ex |
