Patent · US Expired

Composition for extracting gold and silver anions from alkaline solutions and processes for making same

US4894407A · kind A · utility

2Cited by
2References
7Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 15, 1988
Grant dateJan 16, 1990
Priority date
Expiry dateAug 15, 2008

Classification

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

Abstract

An extraction composition useful for extracting gold or silver values from aqueous systems containing gold or silver cyanide anions. Useful extractions include organic oxides of phosphrous and sulfur attached to an inert resinous substrate.

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