Title:
PRODUCTION PROCESS FOR HYDROGENATION OF O-PHENYLENEDIAMINE
Document Type and Number:
WIPO Patent Application WO/2023/216458
Kind Code:
A1
Abstract:
Provided is a production process for hydrogenation of o-phenylenediamine, comprising the following steps: adding a porous catalyst to an autoclave, adding o-nitroaniline and methanol in sequence, introducing hydrogen to replace the air in the autoclave three times, then heating to 100 °C, introducing hydrogen to 1.5 MPa, stirring at a constant speed of 1000 r/min, maintaining the system pressure at 0.8 MPa, incubating for 100 min for reaction, rectifying to give o-phenylenediamine, wherein the ratio of o-nitroaniline to methanol is controlled at 50 g:300 mL.
Inventors:
HUANG ZHONGGUI (CN)
FANG GEXIN (CN)
XIE JUN (CN)
YAO SHANGXI (CN)
JIANG MEILING (CN)
SUN YEPING (CN)
YIN JINHONG (CN)
FANG ZHENGGUI (CN)
YANG HUA (CN)
QI YONGFA (CN)
FANG GEXIN (CN)
XIE JUN (CN)
YAO SHANGXI (CN)
JIANG MEILING (CN)
SUN YEPING (CN)
YIN JINHONG (CN)
FANG ZHENGGUI (CN)
YANG HUA (CN)
QI YONGFA (CN)
Application Number:
PCT/CN2022/114156
Publication Date:
November 16, 2023
Filing Date:
August 23, 2022
Export Citation:
Assignee:
YANG LEI (CN)
International Classes:
B01J23/44; C07C209/36; B01J35/10; C07C211/51
Foreign References:
| CN114685282A | 2022-07-01 | |||
| CN104744267A | 2015-07-01 | |||
| CN104058401A | 2014-09-24 | |||
| CN109395784A | 2019-03-01 | |||
| CN102976304A | 2013-03-20 | |||
| CN109232271A | 2019-01-18 | |||
| CN103012160A | 2013-04-03 | |||
| CN110694641A | 2020-01-17 | |||
| US3576876A | 1971-04-27 |
Attorney, Agent or Firm:
BEIJING JIUCHENG INTELLECTUAL PROPERTY AGENCY (SPECIAL ORDINARY PARTNERSHIP) (CN)
Download PDF: