Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1978-01-19
1979-01-16
Welsh, M. J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
260 292TN, 560 24, 560 25, 560 26, 560 32, 528422, 528211, C08L 7900
Patent
active
041348800
ABSTRACT:
An aromatic urethane of high quality and excellent heat stability can be produced in high yield by reacting an aromatic nitro compound, a hydroxyl group-containing organic compound and carbon monoxide in the presence of a catalytic system composed of (1) palladium, ruthenium, rhodium or a compound thereof, (2) a Lewis acid, and (3) ammonia. The use of such catalytic system can suppress undesirable side reactions to a satisfactory extent and ensures the reaction to proceed without causing any corrosion of a stainless steel reactor. If necessary, water may be added to the reaction system to increase the reaction velocity, by which the unit cost of the catalyst can be reduced.
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Hirai Yutaka
Miyata Katsuharu
Yoshida Hiroshi
Mitsui Toatsu Chemicals Incorporated
Welsh M. J.
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