Title:
POST-TREATMENT METHOD OF SUCROSE-6-CARBOXYLIC ESTER CHLORINATION REACTION LIQUID
Document Type and Number:
WIPO Patent Application WO/2022/056840
Kind Code:
A1
Abstract:
The present application provides a post-treatment method of a sucrose-6-carboxylic ester chlorination reaction liquid. The method comprises: adding ammonia water or water into the sucrose-6-carboxylic ester chlorination reaction liquid to perform a primary neutralization reaction; introducing ammonia gas into the obtained reaction liquid at a preset temperature, adjusting the pH value to a preset alkaline range, and continuously keeping the reaction for a period of time at a reaction temperature; and adding acid into the reaction liquid obtained in the ammonia gas neutralization step, and adjusting the pH value to a preset acidity range. In the present invention, a small amount of ammonia water or water is added, so that the subsequent ammonia gas absorption efficiency can be effectively improved, and an ammonia gas utilization rate is increased; generation of a hydrolysis side reaction of sucrose-6-carboxylic ester is avoided, and the conversion rate and selectivity of the reaction are improved; an organic solvent recovered by subsequent distillation can be directly recycled only by means of simple treatment, so that tedious procedures such as dehydration and rectification treatment on the organic solvent are reduced. The problems such as generation of a large amount of wastewater and treatment of the wastewater are avoided, and the production cost is greatly reduced.
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Inventors:
XIA JIAXIN (CN)
JIANG WEIQIANG (CN)
ZHANG ZHENGSONG (CN)
CHEN CHAOHUI (CN)
HU QINGYANG (CN)
ZHANG HAO (CN)
WANG YANG (CN)
JIANG WEIQIANG (CN)
ZHANG ZHENGSONG (CN)
CHEN CHAOHUI (CN)
HU QINGYANG (CN)
ZHANG HAO (CN)
WANG YANG (CN)
Application Number:
PCT/CN2020/116202
Publication Date:
March 24, 2022
Filing Date:
September 18, 2020
Export Citation:
Assignee:
ANHUI JINHE IND CO LTD (CN)
International Classes:
C07H1/06; C07H13/04
Foreign References:
| CN110078189A | 2019-08-02 | |||
| CN111548375A | 2020-08-18 | |||
| CN110938101A | 2020-03-31 | |||
| CN109956983A | 2019-07-02 | |||
| CN108047283A | 2018-05-18 | |||
| CN111004131A | 2020-04-14 | |||
| CN101472935A | 2009-07-01 | |||
| CN108047283A | 2018-05-18 |
Attorney, Agent or Firm:
BEIJING LONGAN LAW FIRM (CN)
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