The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2022
Filed:
Jun. 19, 2018
Basf SE, Ludwigshafen am Rhein, DE;
Thomas Schmidt, Ludwigshafen, DE;
Armin Stamm, Ludwigshafen, DE;
Marta Reinoso Garcia, Ludwigshafen, DE;
Verena Mormul, Ludwigshafen, DE;
Michael Klemens Mueller, Ludwigshafen, DE;
Frank Jaekel, Ludwigshafen, DE;
Jeremy T Manning, Wyandotte, MI (US);
BASF SE, Ludwigshafen, DE;
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.