Process for preparing isocyanates using sintered oxides

Details Process for preparing isocyanates using sintered oxides Process for preparing isocyanates using sintered oxides

1992-12-28

1994-07-05

Dees, Jose G.

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

Organic compounds

Isocyanate esters

521157, 560338, C07C26304

Patent

active

053269039

ABSTRACT:
A method for preparing isocyanates by the thermal decomposition of carbamates in the presence of a sintered oxide as catalyst under gaseous phase condition. The sintered oxide is composed of at least one element selected from the group consisting of boron, aluminum, silicon, tin, lead, antimony, zinc, yttrium, lanthanum, titanium, zirconium, niobium, tungsten, and iron. The sintered oxide may be composed of at least one element selected from the group consisting of phosphorus, alkali metal element, and alkaline earth metal element.

REFERENCES:
patent: 2692275 (1954-10-01), Bortnick
patent: 2713591 (1955-07-01), Bortnick
patent: 3919279 (1975-11-01), Rosenthal
patent: 4330479 (1982-05-01), Merger et al.

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