Title:
METHOD FOR TREATING TAIL GAS
Document Type and Number:
WIPO Patent Application WO/2023/279279
Kind Code:
A1
Abstract:
The present application provides a method for treating tail gas. The tail gas is produced during the process of sucrose-6-ester being chlorinated to produce sucralose-6-ester. The method comprises: cooling and condensing tail gas so as to remove a portion of organic solvents and water to obtain a first solution and first tail gas; adsorbing and separating the first tail gas by using a hydrophilic ionic liquid so as to remove most of the water and organic solvents therein to obtain second tail gas; adsorbing and filtering the second tail gas by using a solid adsorbent to obtain a gaseous mixture, and separating the gaseous mixture to obtain gaseous hydrogen chloride and liquid sulfur dioxide; and introducing the gaseous hydrogen chloride into water to obtain hydrochloric acid. In the present application, by primarily using ionic liquid adsorption for organic binding with condensation, rectification and other means, the chlorinated tail gas during the sucralose production process may be effectively treated, HCl and SO2 are effectively separated to obtain high-quality hydrochloric acid and liquid SO2 products, the process is simple process, and the costs are low.
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| WO/2008/015487 | METHOD AND APPARATUS FOR CLEANING COMBUSTION GASES |
Inventors:
YANG ZHIJIAN (CN)
CHEN YONGLE (CN)
CHEN YUHAN (CN)
LIU JIAN (CN)
CHEN YONGLE (CN)
CHEN YUHAN (CN)
LIU JIAN (CN)
Application Number:
PCT/CN2021/104940
Publication Date:
January 12, 2023
Filing Date:
July 07, 2021
Export Citation:
Assignee:
ANHUI JINHE IND CO LTD (CN)
International Classes:
B01D53/00; B01D53/02; B01D53/18
Foreign References:
| CN111662164A | 2020-09-15 | |||
| CN205495288U | 2016-08-24 | |||
| CN112010268A | 2020-12-01 | |||
| CN108786375A | 2018-11-13 | |||
| CN103113197A | 2013-05-22 | |||
| CN107188133A | 2017-09-22 | |||
| US20110247494A1 | 2011-10-13 |
Attorney, Agent or Firm:
BEIJING LONGAN LAW FIRM (CN)
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