Patent · US Expired

3-Oxypropyleneimino-bis-(methylene phosphonic acids) and their salts, process for their manufacture and their use

US4450116A · kind A · utility

2Cited by

6References

2Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hans Morawietz · Aesch, CH
Erich Hoffman · Kriftel, DE
Johann Franz Hanauer · Unterneukirchen, DE
Kurt Bauer

Key dates

Filing date	Jul 14, 1982
Grant date	May 22, 1984
Priority date	—
Expiry date	Jul 14, 2002

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB03D2203/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

3-Alkoxypropylenimino-bis-(methylene phosphonic acids) of the formula ##STR1## wherein R is straight-chain or branched alkyl or alkenyl each having from 2 to 20, preferably 2 to 10, carbon atoms, aryl, preferably phenyl or aralkyl, preferably benzyl, and X is hydrogen, an alkali metal, alkaline earth metal, ammonium, alkylammonium or polyalkylenepolyammonium ion, preferably a sodium, potassium or ammonium ion, a process for their manufacture and their use as collector in the flotation of non-sulfidic ores.

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