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Method for recovering gallium from oily gallium arsenide mud

A technology of gallium arsenide and mud, applied in the field of gallium recovery, can solve the problems of difficult recovery, no recovery yet, complex composition of oily gallium arsenide mud, etc., and achieve the effect of reducing impact and harm.

Active Publication Date: 2018-01-23
威科赛乐微电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the complex composition of oily gallium arsenide mud, which contains both organic and inorganic substances, it is difficult to recover, so far there has been no relevant report on the recovery of gallium from oily gallium arsenide mud

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Removal of oil by vacuum distillation: Take 100g of oily gallium arsenide slurry and put it into a 500ml distillation flask, connect the vacuum distillation device, check that the airtightness is good, turn on the vacuum pump, and start heating, the pressure inside the device is 10pa, After the temperature rose to 83°C, heat-preserved distillation was carried out for 0.5h, and 10.8g of oily liquid was collected. After cooling to room temperature, 89g of gallium arsenide waste in the flask was taken out.

[0036] 2) Potential-controlled oxidation leaching: crush the above-mentioned gallium arsenide waste and pass it through a 100-mesh sieve, put it in a 1000ml round bottom flask, add 623g of water and 71.2g of industrial-grade 50% mass fraction at a liquid-solid ratio of 7:1 h 2 o 2 solution, the stirring speed is 500r / min, the temperature is raised to 45°C, and 106.8g of concentrated sulfuric acid with a mass fraction of 98% is added dropwise at a dropping speed of ...

Embodiment 2

[0042] 1) Removal of oil by vacuum distillation: Take 100g of oily gallium arsenide slurry and put it into a 500ml distillation flask, connect the vacuum distillation device, check that the airtightness is good, turn on the vacuum pump, and start heating, the pressure inside the device is 50pa, After the temperature rose to 95°C, heat-preserved distillation was carried out for 0.5 h, and 11.0 g of oily liquid was collected. After cooling to room temperature, 88 g of gallium arsenide waste material in the flask was taken out.

[0043] 2) Potential-controlled oxidation leaching: crush the above gallium arsenide waste and pass it through a 100-mesh sieve, put it in a 1000ml round bottom flask, add 440g of water and 61.6g of industrial-grade 50% mass fraction at a liquid-solid ratio of 5:1 h 2 o 2 solution, the stirring speed is 400r / min, the temperature is raised to 50°C, and 96.8g of concentrated sulfuric acid with a mass fraction of 98% is added dropwise at a dropping speed of...

Embodiment 3

[0049] 1) Removal of oil by vacuum distillation: Take 100g of oily gallium arsenide slurry and put it into a 500ml distillation flask, connect the vacuum distillation device, check that the airtightness is good, turn on the vacuum pump, and start heating, the pressure in the device is 100pa, After the temperature rose to 103°C, heat-preserved distillation was carried out for 0.5h, and 10.2g of oily liquid was collected. After cooling to room temperature, 89.4g of gallium arsenide waste in the flask was taken out.

[0050] 2) Potential-controlled oxidation leaching: crush the above gallium arsenide waste and pass it through a 100-mesh sieve, put it in a 1000ml round-bottomed flask, add 358g of water and 53.64g of industrial-grade 50% mass fraction at a liquid-solid ratio of 4:1 h 2 o 2 solution, the stirring speed is 300r / min, the temperature is raised to 55°C, and 89.4g of concentrated sulfuric acid with a mass concentration of 98% is added dropwise at a dropping speed of 1s / ...

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PUM

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Abstract

The invention provides a method for recycling gallium from oil-bearing gallium arsenide slurry. According to the method, the metal gallium is obtained through reduced-pressure distillation and oil removal, potential-controlled oxidation leaching, extraction for arsenic removal, and liquid formation and electrolysis. The method has the advantages that organic matters in the oil-bearing gallium arsenide slurry are separated and recycled, and liquor potential is controlled during acid leaching, so that arsine generation is prevented, and harm of reactions to operators and environment is reduced; recycling rate and purity of the obtained gallium are high, reaction processes are environment friendly, and resource utilization rate is high.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, in particular to a method for recovering gallium from gallium arsenide slurry. Background technique [0002] Gallium (Ga) is one of the important scattered metals. Compound semiconductor materials and special alloys composed of metal gallium and certain metals have become new technology support materials required by contemporary communications, electronic computers, space development, energy and health departments. . Gallium arsenide is the second-generation semiconductor material after the elemental semiconductors Ge and Si. With its superior characteristics such as high frequency, high electron mobility, and low noise, its application prospects are encouraging. [0003] Gallium arsenide crystals need to go through cutting, grinding, polishing and other processes before they can be sold and used. In these processes, a large amount of gallium arsenide waste will be generated, and its components ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C25C1/22
CPCC22B7/007C25C1/22Y02P10/20
Inventor 汪丽红李琴香黄华强朱刘
Owner 威科赛乐微电子股份有限公司