公开(公告)号：US20230174499A1

公开(公告)日：2023-06-08

申请号：US18081715

申请日：2022-12-15

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Baichun Yang ,  Qiyou Huang ,  Zihao Ye ,  Ao He

IPC: C07D317/38

CPC classification number: C07D317/38

Abstract: The present invention relates to the technical field of chemical industry, and in particular to a method for purifying ethylene carbonate through dynamic crystallization, which includes the following steps: adding an ethylene carbonate-containing raw material into a cavity of a crystallization device under a condition of stirring for dynamic crystallization, wherein the crystallization device further includes a jacket attached and circumferentially disposed along the outer wall of the cavity, the jacket is provided with cooling water therein, a temperature of the cooling water is 1-2.5° C. lower than the temperature in the cavity until a granular ethylene carbonate crystal is generated. The present invention using a rake dryer as the crystallization device to realize dynamic crystallization at a certain rotating speed. The technical solution is simple to operate and short in processing cycle, which facilitates improvement in production efficiency and product quality and is suitable for industrial application.

公开(公告)号：US11958820B2

公开(公告)日：2024-04-16

申请号：US18081715

申请日：2022-12-15

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Baichun Yang ,  Qiyou Huang ,  Zihao Ye ,  Ao He

IPC: C07D317/38

CPC classification number: C07D317/38

Abstract: The present invention relates to the technical field of chemical industry, and in particular to a method for purifying ethylene carbonate through dynamic crystallization, which includes the following steps: adding an ethylene carbonate-containing raw material into a cavity of a crystallization device under a condition of stirring for dynamic crystallization, wherein the crystallization device further includes a jacket attached and circumferentially disposed along the outer wall of the cavity, the jacket is provided with cooling water therein, a temperature of the cooling water is 1-2.5° C. lower than the temperature in the cavity until a granular ethylene carbonate crystal is generated. The present invention using a rake dryer as the crystallization device to realize dynamic crystallization at a certain rotating speed. The technical solution is simple to operate and short in processing cycle, which facilitates improvement in production efficiency and product quality and is suitable for industrial application.