| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to an improved method for distillation purification of polymerisable compounds selected from monomers with at least one reactive double bond or other reactive functional groups, using boiling oil as an intermediate agent, which is a high-boiling, inert, long-term thermally stable substance, where the boiling oil is at the bottom of the fractionation column and boiling point of said oil ranges from 150 to 400C at 1013 mbar, wherein the intermediate agent, without further purification, is returned into the apparatus and at most 10% of the intermediate agent per end product is taken out, and concentration of the polymerisable compound is reduced via heat exchange with boiling oil vapour in the direction towards the lower part of the column and thus in the direction of rising temperature. The method enables to prevent polymerisation of the end product. The invention also relates to use of boiling oil as an intermediate agent, which is a high-boiling, inert, long-term thermally stable substance with boiling point of 150-400C at 1013 mbar, at the bottom of the fractionation column for distillation purification of polymerisable compounds selected from monomers with at least one reactive double bond or other reactive functional groups, wherein the intermediate agent, without further purification, is returned into the apparatus and at most 10% of the intermediate agent per end product is taken out, and concentration of the polymerisable compound is reduced via heat exchange with boiling oil vapour in the direction towards the lower part of the column and thus in the direction of rising temperature. ^ EFFECT: improved method for distillation purification of polymerisable compounds. ^ 6 cl, 1 dwg, 2 ex |
