Preparation of isocyanates having a light color

Details Preparation of isocyanates having a light color Preparation of isocyanates having a light color

C - Chemistry, Metallurgy

07

C

C07C 263/10 (2006.01) C07C 265/00 (2006.01) C08G 18/76 (2006.01) C07C 265/14 (2006.01)

Patent

CA 2229835

In a process for preparing isocyanates having a light color by reacting the corresponding amines with phosgene, the amines are treated with solid inorganic substances containing Lewis acid and/or Brönsted acid centers prior to the reaction with the phosgene.

Dans un processus de préparation d'isocyanates faiblement colorés consistant à faire réagir des amines correspondants avec le phosgène, les amines sont traités avec des substances inorganiques solides contenant des centres d'acide de Lewis et/ou de Brönsted avant la réaction avec le phosgène.

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