METHOD FOR EXTRACTING CONCENTRATED EPICHLOROHYDRIN FROM PRODUCTS OF ALLYL CHLORIDE EPOXIDATION WITH HYDROGEN PEROXIDE ON TITANIUM-CONTAINING ZEOLITE CATALYST Russian patent published in 2016 - IPC C07D301/32 C07D303/08 B01D3/36 

FIELD: chemistry.

SUBSTANCE: invention relates to industrial technology for production of epichlorohydrin (ECH) by means of liquid-phase allyl chloride epoxidation with hydrogen peroxide in methanol on titanium-containing catalyst, more specifically to step for extracting concentrated ECH from reaction mixture. Proposed method for extracting concentrated ECH from products of allyl chloride epoxidation with hydrogen peroxide on titanium-containing zeolite catalyst in presence of methanol involves separation of allyl chloride and methanol from reaction mixture in primary distillation column, separation of remained bottom residue to aqueous and organic solutions, azeotropic rectification of aqueous and organic solutions, return of azeotropic rectification stripping, containing mixture of water, ECH, and methanol residue, into lower part of primary fractionation column. Return of azeotropic rectification stripping therein is carried out in vapour state into lower part of primary fractionation column.

EFFECT: technical result is simplification of process flow of extraction, and reducing specific consumption of heat energy per 1 kg of ECH.

3 cl, 1 dwg, 5 ex