公开(公告)号：US20180346413A1

公开(公告)日：2018-12-06

申请号：US15571274

申请日：2016-05-04

Applicant: BASF SE

Inventor： Thomas SCHAUB ,  Robert BAUMANN ,  Rocco PACIELLO ,  Nicolas GERMAIN

IPC: C07C263/04 ,  C07C269/04

CPC classification number: C07C263/04 ,  C07C269/04 ,  C07C265/12 ,  C07C265/14 ,  C07C271/28

Abstract: A process for preparing an isocyanate compound is provided. The process includes a step of reacting an amine compound A having at least one primary amino group with CO2 and an organotin compound S having at least one radical OR3 attached to the tin atom of the organotin compound to convert at least one of the primary amino groups in the amine compound A into a carbamate group to obtain a carbamate compound C; a step of cleaving the carbamate groups in the obtained carbamate compound C to form the isocyanate compound and an alcohol R3OH, without separation of the tin compounds; and a step of obtaining the isocyanate compound. The radical R3 is a C-bound organic radical of 1-30 carbon atoms with 1, 2, or 3 carbon atoms optionally replaced by oxygen or nitrogen.