Catalytic oxidation of formamides to form isocyanates

Details Catalytic oxidation of formamides to form isocyanates Catalytic oxidation of formamides to form isocyanates

B - Operations, Transporting

01

J

260/455

B01J 23/72 (2006.01) B01J 23/38 (2006.01)

Patent

CA 1117962

CATALYTIC OXIDATION OF FORMAMIDES TO FORM ISOCYANATES ABSTRACT OF THE DISCLOSURE This invention relates to a process for preparing isocyanates from formamides wherein a formamide corresponding to the formula R?(NHCHO)n, where R is an organic group and n is 1 or 2, is oxidized with an oxygen containing gas at a temperature in the range of 300°C to 600°C in the presence of a catalytic amount of copper and/or one or more metals of the Groups IB and VIII of the 5th and 6th period of the Periodic System of Elements to yield the corresponding isocyanate R (NCO)n where R and n have the same meaning as above, and the resultant gaseous isocyanate containing reaction mixture is subjected to a separation process to separate the product isocyanate from water of reaction.

308524

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