Manufacture of organic isocyanates
1,140,145. Isocyanates. IMPERIAL CHEMICAL INDUSTRIES Ltd. 5 Oct., 1967 [21 Oct., 1966], No. 47164/66. Addition to 1,067,316. Heading C2C. Organic isocyanates are made by a process in which an organic nitro compound is reduced to a primary amine, the catalyst (if used) is separated by filtration, the...
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