Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for recovering indium in indium phosphide

A recovery method and technology of indium phosphide, applied in chemical instruments and methods, phosphide, inorganic chemistry, etc., can solve the problems of wasting indium resources, generating phosphine, environmental impact, etc., achieving low cost, improving recovery rate and Purity, effect of reducing environmental impact

Pending Publication Date: 2022-04-22
ZHUZHOU KENENG NEW MATERIAL CO LTD
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as indium phosphide is used more and more widely, there are more and more indium phosphide wastes. A large amount of electronic waste containing indium phosphide not only has a serious impact on the environment, but also wastes precious indium resources. Therefore, Indium phosphide recycling becomes the preferred solution for these wastes
[0006] In the prior art, the recovery of indium element in indium phosphide will cause certain phosphorus pollution, especially phosphine will be produced when the recovery method is adopted.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0031] The indium phosphide with a particle size of 2000 mesh (6.5 μm) and the iron powder with the same particle size of 2000 mesh (6.5 μm) were rounded to be uniform, and the mole ratio of the iron powder and the indium phosphide was 3.5. The obtained mixed powder was placed in a quartz boat, then placed in an atmosphere furnace and heated to 700° C. for 2 hours. The mixed powder was cooled to 500° C., gaseous hydrogen chloride was introduced into the atmosphere furnace, the molar ratio of hydrogen chloride gas to indium phosphide was 33, and gaseous indium chloride was condensed and recovered at the same time.

example 3

[0033] The indium phosphide with a particle size of 2000 mesh (6.5 μm) and the iron powder with the same particle size of 2000 mesh (6.5 μm) are rounded to be uniform, and the mole of iron powder and indium phosphide is 4. The obtained mixed powder was placed in a quartz boat, and then placed in an atmosphere furnace, heated to 800° C., and kept for 2 hours. The mixed powder was cooled to 600° C., gaseous hydrogen chloride was introduced into the atmosphere furnace, the molar ratio of hydrogen chloride gas to indium phosphide was 44, and gaseous indium chloride was condensed and recovered at the same time.

example 4

[0035] The indium phosphide with the particle size of 2000 mesh (6.5 μm) and the iron powder with the same particle size of 2000 mesh (6.5 μm) were rounded to be uniform, and the mole ratio of the iron powder and the indium phosphide was 3.8. The obtained mixed powder was placed in a quartz boat, then placed in an atmosphere furnace and heated to 700° C. for 2 hours. The mixed powder was cooled to 600° C., gaseous hydrogen chloride was introduced into the atmosphere furnace, the molar ratio of hydrogen chloride gas to indium phosphide was 40, and gaseous indium chloride was condensed and recovered at the same time.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for recovering indium in indium phosphide, which comprises the following steps of: uniformly mixing indium phosphide powder and iron powder, heating to carry out high-temperature solid-phase reaction, cooling to a chlorination reaction temperature after the high-temperature solid-phase reaction is completed, introducing hydrogen chloride gas to volatilize indium chloride gas through chlorination, and condensing and recovering the obtained indium chloride gas. According to the method, phosphorus-containing harmful gas generated in the indium phosphide decomposition and chlorination process can be effectively treated, the recovery rate of indium and the purity of indium chloride can be remarkably improved through the method, and the whole process is high in resource recovery and utilization rate and environmentally friendly.

Description

technical field [0001] The invention relates to a method for recovering indium phosphide, in particular to a method for recovering indium in indium phosphide, and belongs to the field of metal indium recovery. Background technique [0002] Indium can be called the "vitamin of alloys". Indium alloys can be used as brazing materials. Indium is a new important additive element for lead-free solders. The development trend of lead-free solders in the world is conducive to the application of indium solders. Taking advantage of the low melting point of indium alloys, it can also be made into special alloys, which are used for circuit breaker protection devices of fire protection systems and thermal control devices of automatic control systems. Indium alloys can also be used in dentistry, anti-corrosion decorative parts of steel and non-ferrous metals, and plastic metallization. [0003] Because indium has strong corrosion resistance and light reflection ability, it can be made int...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00C01B25/08
CPCC01G15/00C01B25/08C01P2006/80
Inventor 赵科湘陈飞
Owner ZHUZHOU KENENG NEW MATERIAL CO LTD