Title:
PREPARATION METHOD FOR 3,3',4,4'-DICYCLOHEXYLTETRACARBOXYLIC ACID AND TREATMENT METHOD FOR ACIDIC WASTEWATER
Document Type and Number:
WIPO Patent Application WO/2023/023883
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of organic synthesis, and provides a preparation method for 3,3',4,4'-dicyclohexyltetracarboxylic acid and a treatment method for acidic wastewater. The preparation method provided in the present invention uses a ruthenium-rhodium mixed catalyst to catalyze a hydrogenation reduction reaction, which improves the selectivity of the reaction and reduces the production of isomers, thereby reducing the production of by-products, and improving the purity of 3,3',4,4'-dicyclohexyltetracarboxylic acid. The data in the embodiments shows that: the purity of 3,3',4,4'-dicyclohexyltetracarboxylic acid prepared by the method provided in the present invention is ≥99.62％.
Inventors:
SHAO SHUAI (CN)
ZHANG YUNTANG (CN)
LI WENGE (CN)
ZHANG YUFEN (CN)
WANG JINGXIAO (CN)
WANG FEIYANG (CN)
YAN QIN (CN)
WANG XIAO (CN)
LIU TIECHENG (CN)
ZHANG YUNTANG (CN)
LI WENGE (CN)
ZHANG YUFEN (CN)
WANG JINGXIAO (CN)
WANG FEIYANG (CN)
YAN QIN (CN)
WANG XIAO (CN)
LIU TIECHENG (CN)
Application Number:
PCT/CN2021/113953
Publication Date:
March 02, 2023
Filing Date:
August 23, 2021
Export Citation:
Assignee:
HEBEI HAILI FRAGRANCES CO LTD (CN)
International Classes:
C07C51/36; C07C61/08
Foreign References:
| CN101985378A | 2011-03-16 | |||
| CN1034707A | 1989-08-16 | |||
| CN112679342A | 2021-04-20 | |||
| CN112851522A | 2021-05-28 | |||
| CN104870522A | 2015-08-26 | |||
| JP2002020345A | 2002-01-23 |
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
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