METHOD OF SEPARATING ETHYLENE GLYCOL AND 1,2-BUTANEDIOL Russian patent published in 2016 - IPC C07C29/82 C07C31/20 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of separating mixture containing ethylene glycol and 1,2-butanediol, which involves distillation of mixture with an azeotropic agent having following structural formula , where R₁ is a H atom or alkyl containing 1-4 carbon atoms, R₂ is a H atom or alkyl containing 1-4 carbon atoms, R₃ is a H atom or alkyl containing 1-8 carbon atoms and R₄ is a H atom or alkyl containing 1-8 carbon atoms. Distillation produces a material stream containing ethylene glycol and azeotropic agent, making said material stream fixed for disintegration, in order to separate a mixture rich in ethylene glycol, and then further distillation of said mixture to produce ethylene glycol.

EFFECT: proposed method enables to obtain ethylene glycol with high purity and high UV transmission.

10 cl, 1 dwg, 7 ex