Title:
PROCESS FOR FRACTIONAL CRYSTALLIZATION OF P-DICHLOROBENZENE
Document Type and Number:
WIPO Patent Application WO/2014/082537
Kind Code:
A1
Abstract:
Disclosed is a process for fractional crystallization of p-dichlorobenzene. 80 wt% of p-dichlorobenzene is used as raw materials. In a fractional crystallizer, the raw materials are refined by using a secondary six-section melt crystallization technology to obtain a product with a mass percentage of the p-dichlorobenzene being more than 99.8%. In the present invention, the process has a simple operation, has a high product yield and low energy consumption, and is easy to be popularized and applied.
Inventors:
SHE DAOCAI (CN)
XU XIAOLIANG (CN)
ZHANG JIANYU (CN)
XU XIAOLIANG (CN)
ZHANG JIANYU (CN)
Application Number:
PCT/CN2013/087320
Publication Date:
June 05, 2014
Filing Date:
November 18, 2013
Export Citation:
Assignee:
JIANGSU LONGCHANG CHEMICAL CO (CN)
International Classes:
C07C17/392; C07C25/08
Foreign References:
| CN102838448A | 2012-12-26 | |||
| CN87104975A | 1988-04-27 |
Other References:
LI, SHIYU ET AL.: "Application of Melt Crystallization Technology on the Production of High Purity p-Dichlorobenzene", CHEMICAL EQUIPMENT TECHNOLOGY, vol. 15, no. 4, 1994, pages 1 - 4
YAN, RIHAI ET AL.: "Application of Multistage Melt Crystallization Refining Process on the Production of p-Dichlorobenzene", CHLOR-ALKALI INDUSTRY, 1999, pages 32, 33, 42
WANG, BIN ET AL.: "A New Type of Melt Crystallization Technique Based on High-Speed Solidification and Sweating", JOURNAL OF JIANGSU POLYTECHNIC UNIVERSITY, vol. 16, no. 2, 2004, pages 33 - 36
YAN, RIHAI ET AL.: "Application of Multistage Melt Crystallization Refining Process on the Production of p-Dichlorobenzene", CHLOR-ALKALI INDUSTRY, 1999, pages 32, 33, 42
WANG, BIN ET AL.: "A New Type of Melt Crystallization Technique Based on High-Speed Solidification and Sweating", JOURNAL OF JIANGSU POLYTECHNIC UNIVERSITY, vol. 16, no. 2, 2004, pages 33 - 36
Attorney, Agent or Firm:
BEIJING YIGE INTELLECTUAL PROPERTY AGENT LTD(GENERAL PARTNERSHIP) (CN)
北京一格知识产权代理事务所(普通合伙) (CN)
北京一格知识产权代理事务所(普通合伙) (CN)
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