Invention Grant
- Patent Title: Process for the preparation of di- and polyamines of the diphenylmethane series
- Patent Title (中): 制备二苯基甲烷系列的二胺和多胺的方法
-
Application No.: US12601577Application Date: 2008-05-16
-
Publication No.: US08399701B2Publication Date: 2013-03-19
- Inventor: Robert Henry Carr , Peter Muller , Rabah Mouazer
- Applicant: Robert Henry Carr , Peter Muller , Rabah Mouazer
- Applicant Address: US TX The Woodlands
- Assignee: Huntsman International LLC
- Current Assignee: Huntsman International LLC
- Current Assignee Address: US TX The Woodlands
- Agent Robert A. Diaz
- Priority: EP07109480 20070604
- International Application: PCT/EP2008/056019 WO 20080516
- International Announcement: WO2008/148631 WO 20081211
- Main IPC: C07C211/00
- IPC: C07C211/00 ; C07C265/00 ; C07C263/00
Abstract:
The present invention relates to a process for the preparation of di- and polyamines of the diphenylmethane series, and to the preparation of di- and polyisocyanates of the diphenylmethane series from these di- and polyamines. The di- and polyamines of the diphenylmethane series are prepared by the reaction of aniline and formaldehyde in the presence of hydrochloric acid. In the present invention, the formaldehyde employed is used as an aqueous solution which contains less than 0.001 wt % of metal ions which are divalent and/or more than divalent.
Public/Granted literature
- US20100174114A1 PROCESS FOR THE PREPARATION OF DI- AND POLYAMINES OF THE DIPHENYLMETHANE SERIES Public/Granted day:2010-07-08
Information query
