Dear Albu,

The following publications describes the separation of Germanium(IV) from Gallium (III) and other compounds via an extraction from aqueous hydrochloric, sulphuric

and phosphoric acid solutions with 3-hydroxy-2-methyl-1-phenyl-

4-pyridone (HX) and 3-hydroxy-2-methyl-1-(4-tolyl)-4-pyridone (HY)

dissolved in chloroform 

Extraction and Separation of Germanium(IV) with 4-Pyridone Derivatives

Vlasta Vojkovi},* Iva Juranovi}, and Biserka Tamhina †

Received June 8, 2000; revised December 22, 2000; accepted December 22, 2000

Extraction of germanium(IV) from aqueous hydrochloric, sulphuric and phosphoric acid solutions with 3-hydroxy-2-methyl-1-phenyl- 4-pyridone (HX) and 3-hydroxy-2-methyl-1-(4-tolyl)-4-pyridone (HY) dissolved in chloroform was studied. Extraction with HX took place in the acidity range 1–3 M H2SO4 or 0.5–9.5 M HCl and that with HY in the range 0.5–5 M H2SO4 or 0.2–9.5 M HCl. Separation of germanium(IV) from a large excess of zinc(II), arsenic(III) and gallium(III)

by extraction with HX and HY was simple and fast. Formation of a GeIV-HX(HY) complex from sulphuric acid solution was applicable for spectrophotometric determination of germanium(IV) in the organic phase at the maximum absorption at 299 nm. Extraction of germanium(IV) with chloroform, in the absence of HX or

HY, from hydrochloric and sulphuric acid solutions, in dependence on acid concentration and on addition of lithium chloride, was also studied.

To view the full publication, please see attached file.

Hoping this will be helpful,

Rafik

At pH between 1-3 in HCl solution. Only Ga iv/ Ge iii (chloride form), using borh, nanofiltration and electrodialysis, which is the best membrane able to perform the undermentioned process?

Dear Albu,

In my answer, I meant that there is no need for NF or electridialysis separation. The separation is simply can be done by reacting the mixture of Ge along with the other species with the indicated reagent and the result will be that the Ge product produced will be extracted by the organic solvent (chlorofom) and the other species will remain in the acidic water.

Hoping this will clarify my point,

Rafik

Gallium can be separated by LIX series of reagent and can separate from many elements like Aluminum, Germanium. I did  did some   work and was patented in 2007 by Government of India