Method for phosgenating compounds containing hydroxyl, thiol, amino and/or formamide groups

Abstract

The invention relates to a method particularly for reacting phosgene with compounds that contain hydroxyl, thiol, amino and/or formamide groups, comprising the steps of: (I) providing a reactor which has a first reaction chamber ( 300, 310, 320, 330, 340, 350 ) and a second reaction chamber ( 200, 210, 220, 230, 240, 250, 260 ), the first and the second reaction chambers being separated from one another by means of a porous carbon membrane ( 100, 110, 120, 130, 140, 150 ); (II) providing carbon monoxide and chlorine in the first reaction chamber; and simultaneously (III) providing a compound containing hydroxyl, thiol, amino and/or formamide groups in the second reaction chamber. The porous carbon membrane is configured to catalyse the reaction of carbon monoxide and chlorine to obtain phosgene, and to allow this formed phosgene to pass into the second reaction chamber. The invention also relates to a reactor that is suitable for carrying out the claimed method.

1 . A reactor for reaction of phosgene with one or more_compounds containing one or more hydroxyl, thiol, amino and/or formamide groups, comprising:
 a first reaction space and a second reaction space, wherein the first and second reaction spaces are separated from one another by a porous carbon membrane;   and   a catalyst for the reaction of phosgene with the compound containing hydroxyl, thiol, amino and/or formamide groups, arranged at least partly on the side of the porous carbon membrane facing the second reaction space.   
     
     
         2 . The reactor as claimed in  claim 1 , wherein an open-cell foam is additionally present in the first reaction space. 
     
     
         3 . The reactor as claimed in  claim 1 , wherein the reactor comprises a multitude of first reaction spaces surrounded by a common second reaction space.