Method for Comprehensive Recovery of Indium and Phosphorus from Indium Phosphide Waste

A technology for indium phosphide and indium waste, which is applied in the field of comprehensive recovery of indium and phosphorus, which can solve the problems of low resource recovery rate, increased residue, waste liquid treatment cost, etc., and achieve the effect of improving resource recovery rate and efficient recovery

Active Publication Date: 2018-07-06
FIRST RARE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent US6126719 discloses a method of vacuum decomposition and recovery of IIIA elements from III-V compounds, in which the phosphorus vapor generated by the decomposition of indium phosphide is absorbed by transition metal sulfate solution (such as copper sulfate solution), resulting in a large amount of phosphorus-containing residues (such as Cu 3 P) and sulfuric acid waste liquid, the resource recovery rate is low, and the cost of residue and waste liquid treatment is increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Put 1 kg of indium phosphide waste that has passed through a 100-mesh sieve into a quartz boat, place the quartz boat on one end of the quartz tube, then place the quartz tube in a tube furnace, place the end of the quartz tube where the quartz boat is placed Temperature zone 1, and the other end is placed in temperature zone 2. After connecting the device and checking the airtightness, pass nitrogen into the quartz tube to replace the air in the quartz tube. After multiple replacements, the air in the quartz tube is completely replaced.

[0029] 2) Start vacuuming to reduce the pressure inside the quartz tube to 10Pa, seal the quartz tube, and raise the temperature so that the temperature in temperature zone 1 is 800°C, and the temperature in temperature zone 2 is 400°C, and keep warm for 4 hours to decompose the indium phosphide waste into liquid indium and Gaseous phosphorus, in which liquid indium is gathered in the quartz boat, and gaseous phosphorus is gathered ...

Embodiment 2

[0033] 1) Put 1 kg of indium phosphide particles passing through a 150-mesh sieve into a quartz boat, place the quartz boat on one end of the quartz tube, then place the quartz tube in a tube furnace, place the end of the quartz tube where the quartz boat is placed Temperature zone 1, and the other end is placed in temperature zone 2. After connecting the device and checking the airtightness, pass nitrogen into the quartz tube to replace the air in the quartz tube. After multiple replacements, the air in the quartz tube is completely replaced.

[0034] 2) Start vacuuming to reduce the pressure inside the quartz tube to 50Pa, seal the quartz tube, and raise the temperature so that the temperature in temperature zone 1 is 1000°C, and the temperature in temperature zone 2 is 450°C, and keep warm for 3 hours to decompose the indium phosphide waste into liquid indium and Gaseous phosphorus, in which liquid indium is gathered in the quartz boat, and gaseous phosphorus is gathered in ...

Embodiment 3

[0038] 1) Put 1 kg of indium phosphide particles passing through a 200-mesh sieve into a graphite boat, place the graphite boat on one end of the quartz tube, then place the quartz tube in a tube furnace, place the end of the graphite boat in the quartz tube on Temperature zone 1, the other end is placed in temperature zone 2. After connecting the device and checking the air tightness, pass nitrogen into the quartz tube to replace the air in the quartz tube. After several replacements, the air in the quartz tube is completely replaced.

[0039] 2) Start vacuuming to reduce the pressure inside the quartz tube to 100Pa, seal the quartz tube, and raise the temperature so that the temperature in temperature zone 1 is 1200°C, and the temperature in temperature zone 2 is 500°C, and keep warm for 2 hours to decompose the indium phosphide waste into liquid indium and Gaseous phosphorus, in which liquid indium is accumulated in the graphite boat, and gaseous phosphorus is accumulated in...

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Abstract

The invention provides a method for comprehensive recovery of indium and phosphorus from an indium phosphide waste material; the indium phosphide waste material is crushed, then is placed in a vacuum tube furnace and is subjected to vacuum heating, indium phosphide is decomposed into indium and phosphorus vapor, and by using programmed cooling, the phosphorus vapor is converted into red phosphorus. According to the method, indium and phosphorus in indium phosphide can be efficiently recovered, the utilization rate of resources is improved, no toxic gas is produced, waste liquor and waste residues are not needed to be treated, and the method is safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of vacuum metallurgy, in particular to a method for comprehensively recovering indium and phosphorus from indium phosphide waste. Background technique [0002] As one of the important III-V compound semiconductor materials, indium phosphide has good application prospects in the fields of electronic devices and optoelectronic devices due to its unique properties. During the production and processing of indium phosphide, a lot of indium phosphide waste will be produced, and its indium content is much higher than that of lead, zinc and other metal smelting slags, which has a high recovery value. [0003] At present, the main processes for treating indium phosphide waste are wet oxidation acid leaching and vacuum pyrolysis. Wet acid leaching process, after leaching with inorganic acid and oxidant, recovers metal indium from the leaching solution, phosphorus is treated with the reduced solution for sewage treatment, resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/023C22B7/00C22B58/00
CPCC01B25/023C01P2006/80C22B7/001C22B58/00
Inventor 黄华强李琴香王文杰朱刘
Owner FIRST RARE MATERIALS CO LTD
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