Patent · US Expired

Process for removing titanium and zirconium from aqueous solutions

US5087373A · kind A · utility

1Cited by

1References

10Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Thomas Kolberg · Heppenheim, DE
Horst Gehmecker · Hofheim, DE
Joachim Heitbaum · Bad Homburg vor der Höhe, DE

Key dates

Filing date	May 29, 1991
Grant date	Feb 11, 1992
Priority date	—
Expiry date	May 29, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F2209/06
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

In a process of removing complexly bound titanium and/or zirconium from acid aqueous solutions the solution which contains the complexly bound titanium and/or zirconium is conditioned in that its pH value is raised to at least 8, any precipitate thus formed is removed and the solution thus treated is passed through an ion exchange plant comprising a cation exchange material and an anion exchange material. The solution is preferably passed through an ion exchange plant which contains the cation exchange material in the H.sup.+ form and the anion exchange material in the OH.sup.- form. The process is particularly intended for the treatment of solutions obtained by the chemical treatment of surfaces preferably of metals, which solutions contain titanium and/or zirconium in the form of fluoro complexes.

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