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1. (WO2017157254) METHOD FOR PREPARING HALOHYDRIN AND EPOXIDE

Pub. No.:    WO/2017/157254    International Application No.:    PCT/CN2017/076389
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Tue Mar 14 00:59:59 CET 2017
IPC: C07C 29/64
C07C 31/34
C07C 31/36
C07D 301/26
C07D 303/04
C02F 1/469
C02F 101/12
Applicants: JIANGXI SUKEER NEW MATERIAL CO., LTD.
江西苏克尔新材料有限公司
Inventors: SHU, Xingtian
舒兴田
LIN, Min
林民
LIAO, Weilin
廖维林
Title: METHOD FOR PREPARING HALOHYDRIN AND EPOXIDE
Abstract:
Provided is a method for preparing an epoxide by halohydration, the method comprising: (1) halohydration: adding H2O, a halogen element and an olefin compound to a reaction unit for reaction to obtain a halohydrin; (2) saponification: saponificating the halohydrin with an alkali metal hydroxide to obtain an epoxide and an alkali metal halide; (3) performing a bipolar membrane electrodialysis of the alkali metal halide to obtain an alkali metal hydroxide and a halogen hydride. Also provided is a method for preparing an epoxide by halohydration, the method comprising: (1) halohydration: halohydrating a halogen hydride, an H2O2 and an olefin compound to obtain a halohydrin; optionally, (2) saponification: saponificating the halohydrin with an alkali metal hydroxide to obtain an epoxide and an alkali metal halide; optionally, (3) performing a bipolar membrane electrodialysis of the alkali metal halide to obtain an alkali metal hydroxide and a halogen hydride. The method according to the present invention is used to prepare a halohydrin or an epoxide having very high selectivity and yield, thereby greatly reducing the amount of waste water and waste slag discharges.