Process for reducing the quantity of hydrolyzable chlorides in i

Details Process for reducing the quantity of hydrolyzable chlorides in i Process for reducing the quantity of hydrolyzable chlorides in i

1987-01-27

1991-02-26

Siegel, Alan

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

Organic compounds

Isocyanate esters

C07C24900

Patent

active

049963511

ABSTRACT:
This invention is a process for removing volatile impurities from a crude isocyanate compound which is prepared in the phosgenation of a primary amine, comprising heating said crude isocyanate compound to a temperature to volatilize said volatile impurities in the presence of an acidic material containing a plurality of strong acid groups. The process permits faster, more complete removal of hydrolyzable chloride impurities than conventional processes.

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