Patent · US Expired

Process for defluorinating an acid sulphate solution

US4567027A · kind A · utility

15Cited by

5References

11Claims

0Family size

Assignee

Metallurgie Hoboken-Overpelt · BE

Inventors

Jacquy J. C. Detournay · Overpelt, BE
Jozef V. M. Sterckx · Neerpelt, BE

Key dates

Filing date	Jul 16, 1984
Grant date	Jan 28, 1986
Priority date	—
Expiry date	Jul 16, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/915
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for defluorinating a solution of a sulphate of Zn, Ni, Cd, Mn and/or Mg, in which Al.sup.3+ and PO.sub.4.sup.3- ions are added to the solution, then the solution is neutralized up to a pH higher than 4 and lower than that one that causes a substantial precipitation of Zn, Ni, Cd, Mn and/or Mg, thereby producing a fluorinated precipitate, and the precipitate is separated from the solution.

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