Patent · US Active

Process for making solid methylglycine diacetate (MGDA) alkali metal salt, and solid particles

US11208375B2 · kind B2 · utility

0Cited by

3References

15Claims

0Family size

Assignee

BASF SE

Inventors

Somnath Shivaji Kadam · Ludwigshafen, DE
Frank Jaekel · Ludwigshafen, DE
Feelly Ruether · Ludwigshafen, DE
Lothar Karrer · Ludwigshafen, DE

Key dates

Filing date	Feb 20, 2018
Grant date	Dec 28, 2021
Priority date	—
Expiry date	May 1, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2009/0086
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Process for making solid methylglycine diacetate (MGDA) alkali metal salt (a), said process comprising the steps of (A) providing a 35 to 60% by weight aqueous solution of said MGDA salt having a temperature in the range of from 50 to 90° C., (B) adding 0.01 to 2% by weight of a particulate solid with a pore volume in the range of from 0.25 to 0.75 cm3/g, determined by nitrogen adsorption in accordance with 66134:1998-02 (b), the percentage referring to the content of (a), (C) crystallizing (a), (D) removing said crystalline (a) from the mother liquor.

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