Title:
METHOD FOR PURIFYING ETHYLENE CARBONATE BY MEANS OF DYNAMIC CRYSTALLIZATION
Document Type and Number:
WIPO Patent Application WO/2023/066026
Kind Code:
A1
Abstract:
The present invention relates to the technical field of chemical engineering, specifically to a method for purifying ethylene carbonate by means of dynamic crystallization. The method comprises the following steps: adding an ethylene carbonate-containing raw material to a cavity of a crystallization apparatus via a feeding port of the crystallization apparatus under stirring conditions for dynamic crystallization, wherein the crystallization apparatus further comprises a jacket which is attached to and arranged around the outer wall of the cavity, and cooling water is provided in the jacket; and controlling the temperature of the cooling water in the jacket to be lower than the temperature in the cavity by 1-2.5°C until granular ethylene carbonate crystals are generated. In the present invention, a rake dryer is used as the crystallization apparatus, the characteristic that the rake dryer can treat a large number of materials is utilized, the range of the difference between the temperature in the cavity of the rake dryer and the temperature of the cooling water in the jacket is controlled, and dynamic crystallization is achieved at a certain rotating speed. By using the technical solution involved in the present invention, the method is simple to operate, has a short treatment period, and is conducive to improving the production efficiency and the product quality and suitable for industrial application.
Inventors:
YANG BAICHUN (CN)
HUANG QIYOU (CN)
YE ZIHAO (CN)
HE AO (CN)
HUANG QIYOU (CN)
YE ZIHAO (CN)
HE AO (CN)
Application Number:
PCT/CN2022/123772
Publication Date:
April 27, 2023
Filing Date:
October 08, 2022
Export Citation:
Assignee:
SHENZHEN CAPCHEM TECHNOLOGY CO LTD (CN)
International Classes:
C07D317/38
Foreign References:
| CN110878078A | 2020-03-13 | |||
| CN114149402A | 2022-03-08 | |||
| US20030040570A1 | 2003-02-27 | |||
| CN111100106A | 2020-05-05 | |||
| CN105600809A | 2016-05-25 | |||
| CN108440489A | 2018-08-24 | |||
| CN106890475A | 2017-06-27 | |||
| CN113845506A | 2021-12-28 | |||
| US3074962A | 1963-01-22 | |||
| CN201010598710A | 2010-12-21 |
Other References:
See also references of EP 4194447A4
Attorney, Agent or Firm:
SHENZHEN GHZF INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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