Title:
METHOD FOR SYNTHESIZING M-PHENYLENEDIAMINE
Document Type and Number:
WIPO Patent Application WO/2022/088301
Kind Code:
A1
Abstract:
Provided is a method for synthesizing m-phenylenediamine. The method involves synthesizing iso-phthalimide from m-phthalodinitrile, anhydrous sodium carbonate and hydrogen peroxide, as raw materials, under the action of a catalyst; and then reacting the iso-phthalimide with sodium hypochlorite, and after the reaction is complete, adding an antioxidant to the reaction product for post-treatment to obtain the m-phenylenediamine. The method has an easy synthesis process and post-treatment process, effectively solves the problem of m-phenylenediamine being easily oxidized and low in quality, has a yield of up to 95% or more and a purity of up to 99% or more, has significantly reduced production costs, and meets the market demand for high-quality m-phenylenediamine.
Inventors:
WANG LIQIN (CN)
WEI FENG (CN)
ZHANG XIAOQIAN (CN)
MENG XIANXING (CN)
SHU YONG (CN)
CHEN QI (CN)
FENG WEICHUN (CN)
XING WENGUO (CN)
WEI FENG (CN)
ZHANG XIAOQIAN (CN)
MENG XIANXING (CN)
SHU YONG (CN)
CHEN QI (CN)
FENG WEICHUN (CN)
XING WENGUO (CN)
Application Number:
PCT/CN2020/129931
Publication Date:
May 05, 2022
Filing Date:
November 19, 2020
Export Citation:
Assignee:
SHANDONG XINGQIANG CHEMICAL INDUSTRY TECH RESEARCH INSTITUTE CO LTD (CN)
UNIV QINGDAO SCIENCE & TECHNOLOGY (CN)
UNIV QINGDAO SCIENCE & TECHNOLOGY (CN)
International Classes:
C07C211/51; C07C209/58; C07C209/90
Foreign References:
| CN111100012A | 2020-05-05 | |||
| CN111440074A | 2020-07-24 | |||
| CN110437080A | 2019-11-12 | |||
| CN102285850A | 2011-12-21 | |||
| JPH05255214A | 1993-10-05 |
Other References:
KATRITZKY, A.R. ET AL.: "Efficient Conversion of Nitriles to Amides with Basic Hydrogen Peroxide in Dimethyl Sulfoxide", SYNTHESIS, no. 12, 31 December 1989 (1989-12-31), XP000103253, DOI: 10.1055/s-1989-27441
LIU YONG-MEI, LIN HE, MIAO-MIAO WANG, YONG CAO, HE-YONG HE, KANG-NIAN FAN: "A General and Efficient Heterogeneous Gold-Catalyzed Hydration of Nitriles in Neat Water under Mild Atmospheric Conditions", CHEMSUSCHEM, vol. 5, no. 8, 5 June 2012 (2012-06-05), pages 1392 - 1396, XP055927077, DOI: 10.1002/cssc.201200203
KHADILKAR BHUSHAN M., MADYAR VIRENDRA R.: "TOTALLY SELECTIVE DRY MICROWAVE ASSISTED AMIDE SYNTHESIS BY HYDRATION OF NITRILE USING SILICA SUPPORTED MnO 2 REAGENT", SYNTHETIC COMMUNICATIONS, TAYLOR & FRANCIS INC., US, vol. 32, no. 11, 1 January 2002 (2002-01-01), US , pages 1731 - 1734, XP055927069, ISSN: 0039-7911, DOI: 10.1081/SCC-120004268
LIU YONG-MEI, LIN HE, MIAO-MIAO WANG, YONG CAO, HE-YONG HE, KANG-NIAN FAN: "A General and Efficient Heterogeneous Gold-Catalyzed Hydration of Nitriles in Neat Water under Mild Atmospheric Conditions", CHEMSUSCHEM, vol. 5, no. 8, 5 June 2012 (2012-06-05), pages 1392 - 1396, XP055927077, DOI: 10.1002/cssc.201200203
KHADILKAR BHUSHAN M., MADYAR VIRENDRA R.: "TOTALLY SELECTIVE DRY MICROWAVE ASSISTED AMIDE SYNTHESIS BY HYDRATION OF NITRILE USING SILICA SUPPORTED MnO 2 REAGENT", SYNTHETIC COMMUNICATIONS, TAYLOR & FRANCIS INC., US, vol. 32, no. 11, 1 January 2002 (2002-01-01), US , pages 1731 - 1734, XP055927069, ISSN: 0039-7911, DOI: 10.1081/SCC-120004268
Attorney, Agent or Firm:
JINAN CLAIM PATENT AGENCY OFFICE (GENERAL PARTNERSHIP) (CN)
Download PDF:
Previous Patent: PREPARATION METHOD FOR M-PHENYLENEDIAMINE
Next Patent: PREPARATION METHOD FOR ISOPHTHALAMIDE
Next Patent: PREPARATION METHOD FOR ISOPHTHALAMIDE