Patent · US Active

Process for manufacturing a complexing agent

US11485703B2 · kind B2 · utility

0Cited by

3References

9Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Schmidt · Neustadt, DE
Armin Stamm · Mainz, DE
Marta Reinoso Garcia · Dossenheim, DE
Verena Mormul · Mannheim, DE
Michael Klemens MUELLER · Ludwigshafen, DE
Frank Jaekel · Ludwigshafen, DE
Jeremy T Manning · Ypsilanti, US

Key dates

Filing date	Jun 19, 2018
Grant date	Nov 1, 2022
Priority date	—
Expiry date	Jun 19, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C229/16
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention is directed towards a process for manufacturing a complexing agent, said process comprising the steps of (a) Providing a nitrile according to general formula (I a) or (I b)With M being selected from alkali metal and hydrogen and combinations thereof, (b) Saponification with a total alkali amount of 2.5 to 2.9 mol of alkali metal hydroxide per mole of nitrile according to general formula (I a) or (I b), respectively, and a pH value in the range of from 9.5 to 11.5 at the end of step (b), (c) Adding an amount of alkali metal hydroxide so that the total alkali content is 2.9 to 3.15 moles per mole nitrile according to general formula (I a) or (I b), respectively, and (d) Allowing further conversion.

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