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Title:
PRODUCTION OF AROMATIC ISOCYANATE
Document Type and Number:
Japanese Patent JPH0489465
Kind Code:
A
Abstract:

PURPOSE: To easily obtain the subject compound on an industrial scale under low reaction pressure in a state to enable easy separation and recovery of catalyst without causing the corrosion problem of the apparatus by reacting an aromatic nitro compound with carbon monoxide in the presence of a specific catalyst.

CONSTITUTION: The objective compound can be produced by reacting an aromatic nitro compound (e.g. nitrobenzene or 5-nitro-resorcinol) with carbon monoxide at 100-300°C (preferably 130-250°C) under 1-300atm (preferably 30-200atm) in the presence of a catalyst, comprising (A) palladium or its compound and (B) a heteropolyacid containing molybdenum or vanadium (e.g. 12- molybdophosphoric acid). Concretely, the aromatic nitro compound is dissolved in a solvent, the catalyst is dissolved or dispersed in a solvent, the compound and the catalyst are charged to a reactor, carbon monoxide is pressed into the reactor and the content is heated to a prescribed.


Inventors:
IZUMI YUSUKE
Application Number:
JP19801390A
Publication Date:
March 23, 1992
Filing Date:
July 27, 1990
Export Citation:
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Assignee:
TOKUYAMA SODA KK
IZUMI YUSUKE
International Classes:
B01J23/648; B01J23/64; B01J23/652; B01J27/13; B01J27/19; B01J27/199; B01J31/24; B01J31/34; B01J31/36; C07B61/00; C07C263/14; C07C265/12; (IPC1-7): B01J23/64; B01J27/13; B01J27/19; B01J27/199; B01J31/24; B01J31/34; B01J31/36; C07B61/00; C07C263/14; C07C265/12



 
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