Patent · US Expired

Simultaneous production of dicarboxylic acids and diamines by splitting polyamides into their monomeric constituents

US6140428A · kind A · utility

2Cited by

4References

5Claims

0Family size

Assignee

BASF SE

Inventors

Ursula Seeliger · Ludwigshafen, DE
Wolfgang Mueller · Wappingers Falls, US
Frank Heimann · Ludwigshafen, DE
Guenther Huber · Ludwigshafen, DE
Wolfgang Habermann
Hartwig Voss · Bischofswerda, DE
Hardo Siegel · Speyer, DE

Key dates

Filing date	Sep 10, 1996
Grant date	Oct 31, 2000
Priority date	—
Expiry date	Sep 10, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C209/62
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for the simultaneous production of dicarboxylic acids and diamines from a) polymers based on polyamides of dicarboxylic acids or their derivatives with diamines, or PA1 b) compositions containing essentially such polymers, by splitting these polymers into their monomeric constituents, comprises treating these polymers or compounds with a base in alcoholic medium, and subsequently converting the resulting dicarboxylate salts electrochemically into the corresponding dicarboxylic acids and bases.

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