Title:
METHOD FOR PREPARING 9-FLUORENONE FROM FLUORENE
Document Type and Number:
WIPO Patent Application WO/2017/177531
Kind Code:
A1
Abstract:
Disclosed is a method for preparing 9-fluorenone from fluorene. 9-fluorenone is prepared using fluorene as a raw material, an alkali as a catalyst, an organic solvent containing an aromatic ring and water as a solvent, and a crown ether as a phase transfer agent. The preparation method of the present invention comprises respectively preparing industrial 9-fluorenone and high-purity 9-fluorenone with industrial fluorene and high-purity fluorene. Under the conditions of the present invention, the conversion rate of fluorene can reach 100%, and the selectivity for fluorenone reaches 100%. After cooling a reaction solution and separating fluorenone crystals, a filtrate containing the solvent, alkali, crown ether, fluorene and fluorenone is directly recycled, and the solvent in the reaction tail gas is absorbed with a high-boiling-point solvent. The method is an energy-saving and environmentally friendly chemical synthesis process.
Inventors:
GAO ZHANXIAN (CN)
YU LIMEI (CN)
XIE HE (CN)
LI HUIFENG (CN)
HE YONGCHAO (CN)
SHI ZHENGMAO (CN)
YU LIMEI (CN)
XIE HE (CN)
LI HUIFENG (CN)
HE YONGCHAO (CN)
SHI ZHENGMAO (CN)
Application Number:
PCT/CN2016/085081
Publication Date:
October 19, 2017
Filing Date:
June 07, 2016
Export Citation:
Assignee:
HENAN BAOSHUN FINE CHEMICAL CO LTD (CN)
UNIV DALIAN TECH (CN)
UNIV DALIAN TECH (CN)
International Classes:
C07C45/26; C07C49/675
Foreign References:
| CN103435456A | 2013-12-11 | |||
| CN103787858A | 2014-05-14 | |||
| CN103435463A | 2013-12-11 | |||
| JP2011251935A | 2011-12-15 |
Attorney, Agent or Firm:
DALIAN EAST PATENT AGENT LTD. (CN)
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