Patent · US Expired

Process for the removal of bismuth from copper refining electrolyte by using lead oxide

US5133948A · kind A · utility

12Cited by
3References
3Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 11, 1991
Grant dateJul 28, 1992
Priority date—
Expiry dateJul 11, 2011

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC01P2006/80
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Bismuth impurity is removed from copper electrolyte by contacting the electrolyte with an effective amount of finely divided lead oxide.

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