公开(公告)号：US3835172A

公开(公告)日：1974-09-10

申请号：US21738472

申请日：1972-01-12

Applicant: HOECHST AG

Inventor： ARNDT O ,  SEMLER G ,  SCHAEFFER G

IPC: C07C265/12 ,  C07C119/04

CPC classification number: C07C263/10 ,  C07C265/12 ,  C07C265/14

Abstract: Improved process for the preparation of aromatic isocyanates by reaction of phosgene with primary aromatic amines or their salts in a suspension in an inert solvent, in which the reaction is carried out in the presence of catalytic amounts of a compound containing at least 6 polyethylene oxide groups in one chain. By the addition of said compound the required amount of phosgene is reduced, the reaction proceeds faster and the isocyanates are obtained in higher yields.

Abstract translation: 通过光气与伯芳香胺或其盐在惰性溶剂中的悬浮液中反应来制备芳族异氰酸酯的改进方法，其中反应在催化量的含有至少6个聚环氧乙烷基团的化合物存在下进行 在一个链。 通过加入所述化合物，所需量的光气减少，反应进行得更快，以更高的产率获得异氰酸酯。

公开(公告)号：BR7204017D0

公开(公告)日：1973-11-01

申请号：BR401772

申请日：1972-06-21

Applicant: HOECHST AG

Inventor： SEMLER G ,  SCHAEFFER G

IPC: C07C68/02 ,  C07C69/96 ,  C07C69/64