N-hydroxy alkane amino alkane diphosphonic acids, process of producing same, and compositions for and method of using same

US4029696A · kind A · utility

Assignee

• Benckiser-Knapsack GmbH · DE

Inventors

• Klaus Sommer · Heidelberg, DE
• Guenter Raab · Hemsbach, DE

Key dates

• Filing date: Apr 9, 1976
• Grant date: Jun 14, 1977
• Expiry date: Apr 9, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S162/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Valuable amino alkane diphosphonic acids in which one or both hydrogen atoms of the amino group are substituted by hydroxy alkane groups, and their alkali metal salts and a process of making them are described. Said compounds are highly water-soluble, are stable against hydrolysis even at temperatures exceeding 100.degree. C., and have a high sequestering power so that they can be used advantageously, for instance, in processing aqueous media of considerable hardness, in baths for treating textiles, in the paper manufacture, in tanning, as liquid fertilizers, and for other purposes.