Patent · US Expired

Method for effecting solvent extraction of metal ions using hydrocarbon soluble aminomethylene phosphonic acid compounds

US6267936A · kind A · utility

23Cited by

4References

14Claims

0Family size

Assignees

BASF SE
Instituto Nacional de Engenharia Tecnologia E Inov · PT

Inventors

Francisco Delmas · Kingsley Road, PT
Carlos Nogueira · Amadora, PT
Michael Ehle · Ludwigshafen, DE
Knut Oppenlander · Ludwigshafen, DE

Key dates

Filing date	Mar 29, 1999
Grant date	Jul 31, 2001
Priority date	—
Expiry date	Mar 29, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/20
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Solvent extraction of one or more metal ions from an aqueous solution in the presence of hydrocarbon-soluble aminomethylenephosphonic acid derivatives.

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