Patents Assigned to Instituto National de Engenharia e Tecnologia - Justia Patents Search

Patents Assigned to Instituto National de Engenharia e Tecnologia

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

Patent number: 6267936

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

Type: Grant

Filed: March 29, 1999

Date of Patent: July 31, 2001

Assignees: BASF Aktiengesellschaft, Instituto National de Engenharia e Tecnologia

Inventors: Francisco Delmas, Carlos Nogueira, Michael Ehle, Knut Oppenländer