Title:
METHOD FOR PREPARING 4,4'-OXYDIANILINE FROM NITROCHLOROBENZENE AND NITROPHENOLATE SALT
Document Type and Number:
WIPO Patent Application WO/2022/019369
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing 4,4'-oxydianiline, comprising the steps of: obtaining a reactant containing dinitrodiphenyl ether by mixing and reacting nitrochlorobenzene and nitrophenolate salt under the presence of an organic acid-intercalated hydrotalcite catalyst; and (a second step) obtaining a product by hydrogenating the reactant containing the dinitrodiphenyl ether, and disclosed is a novel preparation method related to: the mass production of 4,4'-oxydianiline, which is a raw material for a polyimide; the high-yield production of dinitrodiphenyl ether, which is a raw material for the material; and the like.
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Inventors:
PARK JAE BUM (KR)
HAM JONG WOO (KR)
HYEON DONG HUN (KR)
HAM JONG WOO (KR)
HYEON DONG HUN (KR)
Application Number:
PCT/KR2020/010590
Publication Date:
January 27, 2022
Filing Date:
August 11, 2020
Export Citation:
Assignee:
HUCHEMS FINE CHEMICAL CORP (KR)
International Classes:
C07C213/06; B01J21/10; C07C217/90
Foreign References:
| JP2005145862A | 2005-06-09 | |||
| CN107779976A | 2018-03-09 | |||
| KR20120037822A | 2012-04-20 | |||
| EP0193358A1 | 1986-09-03 |
Other References:
V. S. PILYUGIN ; YU. E. SAPOZHNIKOV ; G. V. KISELEVA ; N. A. SAPOZHNIKOVA ; T. P. VOROBEVA ; E. V. KLIMAKOVA: "Synthesis and Structure of Di[methoxy(ethoxy)carbonylamino-1H-benzimidazol-5-yl] Ethers", RUSSIAN JOURNAL OF GENERAL CHEMISTRY, vol. 75, no. 10, 1 October 2005 (2005-10-01), Mo , pages 1509 - 1513, XP019300885, ISSN: 1608-3350
Attorney, Agent or Firm:
OAM PATENT & TRADEMARK LAW FIRM (KR)
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