Process for the acid digestion of metal-containing compounds

US9487845B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Heidenfelder · Münstermaifeld, DE
• Helmut Witteler · Monsheim, DE
• Bernd Laubusch · Bad Kötzting, DE
• Hans-Peter Seelmann-Eggebert · Schifferstadt, DE

Key dates

• Filing date: May 12, 2011
• Grant date: Nov 8, 2016
• Expiry date: May 17, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Aqueous leachant compositions and processes for using the same comprising: (a) providing a metal-containing compound; and (b) subjecting the metal-containing compound to an acid digestion comprising contacting the metal-containing compound with an aqueous leachant; wherein the aqueous leachant comprises a mixture selected from the group consisting of: (i) sulfuric acid and one or more alkanesulfonic acids having alkane moieties selected from the group consisting of propyl, ethyl and methyl groups, at a weight ratio of alkanesulfonic acid to sulfuric acid of 1:1000 to 1:1; (ii) sulfuric acid and one or more salts of alkanesulfonic acids having alkane moieties selected from the group consisting of propyl, ethyl and methyl groups, at a weight ratio of salt of alkanesulfonic acid to sulfuric acid of 1:9 to 1:99.