Patent · US Expired

Distillative preparation of IPDA having a high cis/trans isomer ratio

US7497931B2 · kind B2 · utility

2Cited by

6References

18Claims

0Family size

Assignee

BASF SE

Inventors

Frank Funke · Bischofswerda, DE
Thomas Hill · Ludwigshafen, DE
Jobst Rüdiger von Watzdorf · Mannheim, DE
Wolfgang Mattmann · Schifferstadt, DE
Wolfgang Harder · Weinheim, DE
Erhard Henkes · Lorsch, DE
Gerd Littmann · Weinheim, DE
Manfred Julius · Schifferstadt, DE

Key dates

Filing date	Aug 8, 2003
Grant date	Mar 3, 2009
Priority date	—
Expiry date	Sep 7, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S203/20
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a process for recovering 3-aminomethyl-3,5,5-trim-ethylcyclohexylamine (isophoronediamine, IPDA) having a fractionally distilled cis/trans isomer ratio of at least 73/27. The process includes the following steps:

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