Patent · US Active

Mixtures of chelating agents, and process for making such mixtures

US10676700B2 · kind B2 · utility

0Cited by

1References

12Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Schmidt · Neustadt, DE
Marta Reinoso Garcia · Dossenheim, DE
Carsten SUELING · Bischofswerda, DE
Verena Mormul · Mannheim, DE

Key dates

Filing date	Mar 29, 2017
Grant date	Jun 9, 2020
Priority date	—
Expiry date	May 5, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D2111/12
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present invention is directed towards mixtures comprising (A) 90 to 99.999% by weight of racemic methyl glycine diacetic acid (MGDA) or of MGDA with predominantly the L-isomer in an enantiomeric excess of up to 9.5% or their respective mono-, di- or trialkali metal or mono-, di- or triammonium salts, and (B) in total 0.001 to 10% by weight of the diacetic acid derivative of aspartate as free acid or as mono-, di-, tri- or tetraalkali metal salt or as mono-, di-, tri- or tetraammonium salt, percentages referring to the sum from (A) and (B).

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