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Reclamation of germanium from chromium-germanium alloy waste material by wet method

A technology of germanium alloy and wet method, which is applied in the field of wet recovery of germanium from chromium-germanium alloy waste, can solve uneconomical problems

Active Publication Date: 2008-05-28
YUNNAN LINCANG XINYUAN GERMANIUM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is obviously extremely uneconomical for germanium, which has extremely low reserves in nature and exists as a scattered metal.

Method used

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  • Reclamation of germanium from chromium-germanium alloy waste material by wet method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, use level is that about 100g of chromium-germanium alloy waste material of 81.72% is divided into experiment 4 times, each about 25g, waste material is put into the flask of 2000ml, adds H 2 O125ml, stir, add 12.5-75g NaOH respectively, after it dissolves, add chromium-germanium alloy scrap, add the H of concentration 18-48% slowly respectively 2 o 2 75-200ml, H 2 o 2 The input speed is the first 1 / 4 period: the remaining time of the first half: the second half = 1: 2: 2.5-3.5; the reaction time is 8-12h, and then moved into the evaporator to evaporate to 125-150ml. Then transfer to a distillation bottle to cool to room temperature, add 500-850ml of HCl with a concentration of 10.5mol / L to react, slowly heat up to 84-100°C for distillation after 30 minutes, and receive it with a 5-stage receiving bottle. When the distilled solution was cooled to room temperature, MnO was added separately 2 25-125g, HCl 125-250ml to react, the reaction time is 4-7h, and...

Embodiment 2

[0028] Embodiment 2, take out 40kg from the chromium-germanium alloy cutting material of 83.87% from 400kg grade, carry out industrial test in 4 times, each time material 10kg, the amount of the NaOH that adds is 15kg, and concentration is 30% H 2 o2 98-100L, add 280L of HCl with a concentration of 10.5mol / L for the first distillation, and add 80L of HCl with a concentration of 10.5mol / L after the first distillation finishes cooling, MnO 2 20kg, the second distillation was carried out after 2 hours of reaction, the third addition of HCl reaction and the number of distillation were 30L, MnO 2 It is 6kg, adopts 7 grades of receiving bottles to receive, wherein, the 1st-5th grade is identical with embodiment 1 concentration, the 6th, 7th grade adopts 40% NaOH, according to the above-mentioned process step of regulation, reclaims the GeCl that obtains 4 As shown in Table 2, no germanium has been detected in the seventh-level receiving bottle, which is not listed in the table.

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Abstract

Provided is a process of germanium wet-recovery from chromium-germanium alloy waste. The invention provides a process for recovering germanium aiming at that chromium-germanium alloy contains multiple metallic impurities, and germanium waste material is mixed with a vast amount of organic materials due to the employment of organic solvent in process of mutually wrapping and cutting of the chromium-germanium. A dissolution system of NaOH-H2O2 is employed to destroy organic matters in the waste material, which enables the organic matters to be saponified in NaOH, H2O2 is employed to oxygenize the bare metal germanium in the waste material, which enables the metal germanium to turn into ions which enter solution, then hydrochloric acid is employed to neutralize excessive alkali and distill out dissolved germanium, further hydrochloric acid in hydrochloric acid-MnO2 system is employed to react with chromium and part of metal impurities to enter the solution, the other part of the metal impurities which do not react with the hydrochloric acid is oxidized by chlorine gas to enter the solution, the chlorine gas is generated by the reaction of MnO2 and the hydrochloric acid, germanium wrapped by the impurities is released to react with the chlorine gas to form Ge4+ ions, the Ge4+ ions are combined with chloride ions to form germanium tetrachloride which then escapes after secondary distillation, thereby being separated from the other impurities. The recovery ratio by employing the germanium recovering process reaches above 99%.

Description

technical field [0001] The invention relates to a method for wet recovery of germanium from germanium alloy waste, in particular to a wet recovery method for germanium from chromium-germanium alloy waste. Background technique [0002] The content of germanium in the chromium-germanium alloy can reach about 70-80%. In addition, the alloy also contains metal impurities such as nickel, cobalt, iron, manganese, and copper. When cutting the chromium-germanium alloy in the production process, it is also mixed with Lots of organic matter. When this waste material is recovered and treated by the usual chlorine or ferric chloride oxidation and hydrochloric acid distillation, the recovery rate of germanium is not high due to the interference of organic matter and the close wrapping of germanium and chromium and other metal impurities. Burn the material to remove organic matter, and then use the usual chlorine or ferric chloride method to oxidize and process this waste material with h...

Claims

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Application Information

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IPC IPC(8): C22B41/00C22B3/04C22B3/12C22B3/10
Inventor 普世坤包文东郑洪
Owner YUNNAN LINCANG XINYUAN GERMANIUM IND
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