Process for producing isocyanate compound

Details Process for producing isocyanate compound Process for producing isocyanate compound

1991-08-14

1992-11-24

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

C07C26300

Patent

active

051664143

ABSTRACT:
There is disclosed a process for producing an isocyanate compound from a formamide compound or an amine compound which comprises (a) the first reaction step of reacting a formamide compound with dimethyl carbonate in the presence of an alkali catalyst, or reacting methyl formate and an amine compound with dimethyl carbonate in the presence of an alkali catalyst, to produce a corresponding urethane compound, and (b) the second reaction step of thermally decomposing the urethane compound at a temperature of 150.degree.-350.degree. C. and separately recovering the methanol and the corresponding isocyanate compound thus formed.

REFERENCES:
patent: 3277140 (1966-10-01), Donovan et al.
patent: 4100351 (1978-07-01), Romano et al.
patent: 4258200 (1981-03-01), Daughenbaugh

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