Patent · US Active

Process for the production of di- and polyamines of the diphenylmethane series

US10239984B2 · kind B2 · utility

0Cited by

14References

14Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Jürgen Arras · Itzehoe, DE
Stefan Wershofen · Mönchengladbach, DE
Javier Perez-Ramirez · Zürich, CH
Tobias Caesar Keller · Bremgarten, CH

Key dates

Filing date	Jul 2, 2015
Grant date	Mar 26, 2019
Priority date	—
Expiry date	Jul 2, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a production process for polyamines through condensation of aromatic amines with formaldehyde employing at least one solid zeolite catalyst partially or fully ion-exchanged to the protonic form which has been

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.