Invention Grant
- Patent Title: Process for producing diamines and polyamines of the diphenylmethane series
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Application No.: US12405287Application Date: 2009-03-17
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Publication No.: US09701617B2Publication Date: 2017-07-11
- Inventor: Stefan Wershofen , Heinz-Herbert Müller , Richard Adamson , Fritz Pohl , Knut Sommer
- Applicant: Stefan Wershofen , Heinz-Herbert Müller , Richard Adamson , Fritz Pohl , Knut Sommer
- Applicant Address: DE Leverkusen
- Assignee: Covestro Deutschland AG
- Current Assignee: Covestro Deutschland AG
- Current Assignee Address: DE Leverkusen
- Agent N. Denise Brown
- Priority: DE102008015123 20080320
- Main IPC: C07C263/10
- IPC: C07C263/10 ; C07C209/78
Abstract:
The present invention relates to a process for producing diamines and polyamines of the diphenylmethane series (MDA) by reacting aniline and formaldehyde in the presence of an acid catalyst, wherein the aniline contains in total less than 0.5 wt. %, based on the total weight of aniline, of one or more compounds which contain at least one carbonyl group or of one or more compounds that are formed by reaction of these compounds which contain at least one carbonyl group with aniline.
Public/Granted literature
- US20090240077A1 PROCESS FOR PRODUCING DIAMINES AND POLYAMINES OF THE DIPHENYLMETHANE SERIES Public/Granted day:2009-09-24
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