Aqueous solutions containing a complexing agent in high concentration

US9850453B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Markus Christian Biel · Mannheim, DE
• Thomas Greindl · Bad Dürkheim, DE
• Markus Hartmann · Neustadt, DE
• Wolfgang Staffel · Otterstadt, DE
• Marta Reinoso Garcia · Dossenheim, DE

Key dates

• Filing date: May 13, 2014
• Grant date: Dec 26, 2017
• Expiry date: May 13, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D7/34
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Aqueous solution comprising (A) in the range of from 30 to 60% by weight of a complexing agent, selected from the alkali metal salts of methylglycine diacetic acid and the alkali metal salts of glutamic acid diacetic acid, (B) in the range of from 1 to 25% by weight of at least one salt of a sulfonic acid or of an organic acid, percentages referring to the total respective aqueous solution.