Method for producing isocyanates

Details Method for producing isocyanates Method for producing isocyanates

2005-06-22

2009-02-10

Witherspoon, Sikarl A (Department: 1621)

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

Organic compounds

Isocyanate esters

Reexamination Certificate

active

07488842

ABSTRACT:
The invention relates to a process for preparing isocyanates by reacting amines with phosgene in the gas phase in a reaction zone, with the reaction mixture being passed through a zone into which a liquid is sprayed to stop the reaction, wherein the reaction mixture is passed through a zone having a reduced flow cross section between the reaction zone and the zone into which the liquid is sprayed.

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