Patent · US Expired

Preparation of .alpha.-alaninediacetic acid or its alkali metal or ammonium salts

US5530159A · kind A · utility

0Cited by

2References

3Claims

0Family size

Assignee

BASF SE

Inventors

Michael Kneip · Ludwigshafen, DE
Juergen Schneider · Freinsheim, DE
Alfred Oftring · Bad Dürkheim, DE

Key dates

Filing date	Oct 21, 1994
Grant date	Jun 25, 1996
Priority date	—
Expiry date	Oct 21, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C227/26
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for preparing .beta.-alaninediacetic acid (Ia) or its alkali metal or ammonium salts (Ib) which comprises reacting iminodiacetic acid with acrylonitrile or C.sub.1 -C.sub.4 -alkyl acrylates in weakly acid to weakly basic aqueous medium and subsequently hydrolyzing the nitrile or ester moiety to the acid or a salt. The products prepared according to the invention can be used, in particular, to form complexes.

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