Patent · US Active

Method and apparatus for Ga-recovery

US11505847B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

FREIBERGER COMPOUND MATERIALS GMBH · DE

Inventors

Thomas Sowden Reinhold · Hachenburg, DE
Stefan Eichler · Dresden, DE
Berndt Weinert · Freiberg, DE
Oliver Zeidler · Schwerte, DE
Michael Stelter · Chemnitz, DE

Key dates

Filing date	Jun 13, 2017
Grant date	Nov 22, 2022
Priority date	—
Expiry date	Oct 22, 2039

Classification

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

Abstract

The present invention encompasses a method of selectively separating Ga from wastewaters with the aid of a dialysis method. This exploits the particular complexation behaviour of Ga, which forms an unstable tetrahalo complex. This forms only in the case of a sufficiently high halide concentration. Since the halide concentration becomes lower across the membrane, the Ga-tetrahalo complex breaks down in the membrane, as a result of which the Ga is retained. Other metals such as In and Fe do not show this behaviour, and therefore the tetrahalo complexes of these metals can pass through the membrane and hence can be selectively separated off.

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