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Preparation method of low-chloride high-purity germanium dioxide

A technology of germanium dioxide and high-purity germanium tetrachloride, which is applied in directions such as germanium dioxide, can solve the problem that germanium dioxide cannot meet the demand of low-chlorine and high-purity germanium dioxide, and achieves the improvement of the direct yield of hydrolysis and the improvement of hydrolysis. rate, the effect of reducing chlorine content

Inactive Publication Date: 2017-04-19
YUNNAN LINCANG XINYUAN GERMANIUM IND +1
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Benefits of technology

This patented technology describes an improved way to produce highly pure gallium oxide with fewer contaminants compared to traditional methods like acidic distillations. By utilizing this technique, the production can be done at higher efficiency without causing damage from excessive decomposition reactions that occur during previous processes. Additionally, the addition of oxygen allows for better control over the final quality of the material due to its ability to remove any unwanted elements such as iron. Overall, these technical improvements improve the performance and effectiveness of the manufacturing process of galliuminum oxides

Problems solved by technology

This patents describes different ways to make pure or low-chlorinated germania with very good properties such as its ability to absorb visible lights at certain wavelength ranges. These techniques help create better quality germaniums that will find use in applications like solar cells and electronics industries due to their unique characteristics.

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  • Preparation method of low-chloride high-purity germanium dioxide

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Embodiment 1

[0024] Embodiment 1: the preparation of low-chlorine high-purity germanium dioxide, concrete method is as follows:

[0025] (1) Secondary re-distillation of crude germanium tetrachloride: take the crude germanium tetrachloride produced by the chlorination distillation of germanium concentrate, add it to a 500 L enamel still, and then add a volume equal to the volume of crude germanium tetrachloride 2 times of analytically pure hydrochloric acid and feed into the chlorine gas whose volume is 0.5 times of the volume of thick germanium tetrachloride, start to heat up and re-steam the thick germanium tetrachloride, the main effect of chlorine gas is to oxidize the impurities close to the boiling point of germanium tetrachloride; The germanium tetrachloride produced by the first re-evaporation is added to another 500 L enamel for the second heating and re-evaporation. Also add analytical pure hydrochloric acid and chlorine gas whose volume is 0.25 times the volume of germanium tetra...

Embodiment 2

[0032] Embodiment 2: the preparation of low-chlorine high-purity germanium dioxide, concrete method is as follows:

[0033] (1) Secondary re-distillation of crude germanium tetrachloride: take the crude germanium tetrachloride produced by the chlorination distillation of germanium concentrate, add it to a 500 L enamel still, and then add a volume equal to the volume of crude germanium tetrachloride 1.5 times of analytically pure hydrochloric acid and feed into the chlorine gas whose volume is 2 times of the volume of thick germanium tetrachloride, start to heat up and re-steam the thick germanium tetrachloride, the main effect of chlorine is to oxidize the impurities close to the boiling point of germanium tetrachloride; The germanium tetrachloride produced by the first re-evaporation was added to another 500 L enamel for the second heating and re-evaporation, and analytically pure hydrochloric acid and chlorine gas with a volume twice the volume of germanium tetrachloride were...

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Abstract

The invention relates to the field of hydrometallurgy, in particular to a preparation method of low-chloride high-purity germanium dioxide. According to the process, coarse germanium tetrachloride is subject to repeated steaming and rectification to obtain high-purity germanium tetrachloride, and a brand new method is adopted in the hydrolysis section of the high-purity germanium tetrachloride, wherein high-purity nitrogen is adopted for gasifying the high-purity germanium tetrachloride into germanium tetrachloride gas, then the germanium tetrachloride gas is led into a special hydrolysis device, vacuum filtration and germanium dioxide washing are carried out after hydrolysis is finished, then germanium dioxide is dried, the germanium dioxide is dried secondly, and drying is carried out secondly. The low-chloride high-purity germanium dioxide obtained through the process method has the beneficial effects that the purity can reach 99.9999% or above, the chlorine content is lower than 0.0030%, and the germanium dioxide direct recovery rate reaches 92.0% or above.

Description

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Claims

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Application Information

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Owner YUNNAN LINCANG XINYUAN GERMANIUM IND
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