Title:
DECHLORIDATION METHOD FOR RESIDUAL LIQUID OF DICHLOROPROPANOL FINISHING TANK IN MANUFACTURING EPICHLOROHYDRIN
Document Type and Number:
WIPO Patent Application WO/2022/155781
Kind Code:
A1
Abstract:
A dechloridation method for residual liquid of a dichloropropanol finishing tank in manufacturing epichlorohydrin, belonging to the technical field of the manufacture of epichlorohydrin. The technical solution thereof comprises: using an excessive amount of sodium hydroxide to treat residual liquid of a dichloropropanol finishing tank to enable chlorine in the residual liquid to react; and then neutralizing the excess sodium hydroxide with hydrochloric acid. Both the filter residue and waste water produced by the reaction can be simply and conventionally treated. The method greatly reduces the damage of organic chlorides to an incinerator, prolongs the service life of the incinerator, reduces the replacement period of the incinerator device, and improves the economic benefit. Further, harmful substances during incineration are also reduced, and operation and maintenance are convenient.
Inventors:
XIA YAN (CN)
ZHOU HUANEN (CN)
YU ZHENGUANG (CN)
QIU JINRUI (CN)
LI MINGFU (CN)
XIANG ZIXI (CN)
ZHOU HUANEN (CN)
YU ZHENGUANG (CN)
QIU JINRUI (CN)
LI MINGFU (CN)
XIANG ZIXI (CN)
Application Number:
PCT/CN2021/072663
Publication Date:
July 28, 2022
Filing Date:
January 19, 2021
Export Citation:
Assignee:
HUIZHI ENGINEERING SCIENCE & TECH CO LTD (CN)
International Classes:
C07D301/26; C02F1/66; C02F9/04; C02F9/08; C02F9/10; C07D301/32
Foreign References:
| CN101712661A | 2010-05-26 | |||
| CN102399031A | 2012-04-04 | |||
| CN109851121A | 2019-06-07 | |||
| US20150246895A1 | 2015-09-03 |
Attorney, Agent or Firm:
QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (CN)
Download PDF: