Title:
CATALYST FOR GAS-PHASE OXIDATION OF 1,2,4,5-TETRAALKYLBENZENE, PREPARATION METHOD FOR AND APPLICATION OF CATALYST, AND PREPARATION METHOD FOR BENZENE-1,2,4,5-TETRACARBOXYLIC DIANHYDRIDE
Document Type and Number:
WIPO Patent Application WO/2023/072247
Kind Code:
A1
Abstract:
Disclosed in the present invention are a catalyst for gas-phase oxidation of 1,2,4,5-tetraalkylbenzene to prepare benzene-1,2,4,5-tetracarboxylic dianhydride, a preparation method for and an application of the catalyst, and a preparation method for benzene-1,2,4,5-tetracarboxylic dianhydride. The catalyst according to the present invention comprises a carrier and a catalytically active component coating attached to the carrier; the catalytically active component coating comprises a first coating and a second coating; the first coating is close to the surface of the carrier, and the second coating is distant from the surface of the carrier; in the first coating, the mass ratio of titanium element denoted by Ti to vanadium element denoted by V is Ti/V1; in the second coating, the mass ratio of titanium element denoted by Ti to vanadium element denoted by V is Ti/V2, wherein Ti/V2=Ti/V1+ΔTi/V, and ΔTi/V is within a range of 3 to 9. The catalyst according to the present invention exhibits improved catalytic activity, and can effectively increase the yield of benzene-1,2,4,5-tetracarboxylic dianhydride.
Inventors:
AN XIN (CN)
YUAN BIN (CN)
LIU YUFEN (CN)
SHI HUIMIN (CN)
ZHANG DONGSHUN (CN)
ZHANG ZUOFENG (CN)
YUAN BIN (CN)
LIU YUFEN (CN)
SHI HUIMIN (CN)
ZHANG DONGSHUN (CN)
ZHANG ZUOFENG (CN)
Application Number:
PCT/CN2022/128240
Publication Date:
May 04, 2023
Filing Date:
October 28, 2022
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
BEIJING RES INST CHEMICAL IND CHINA PETROLEUM & CHEMICAL CORP (CN)
BEIJING RES INST CHEMICAL IND CHINA PETROLEUM & CHEMICAL CORP (CN)
International Classes:
B01J23/22
Foreign References:
| CN111097466A | 2020-05-05 | |||
| CN109158119A | 2019-01-08 | |||
| US20110230668A1 | 2011-09-22 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
Download PDF:
Previous Patent: PROLYL HYDROXYLASE DOMAIN-CONTAINING PROTEIN (PHD) INHIBITORS AND USES THEREOF
Next Patent: PYRIDYL-CONTAINING COMPOUND
Next Patent: PYRIDYL-CONTAINING COMPOUND