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

Preparation method of high-purity gold

A technology of pure gold and gold flakes, applied in the field of preparation of high-purity gold, can solve the problems of long production cycle, high labor intensity, heavy pollution, etc., and achieve the effects of reducing pollution and utilization, improving production efficiency, and good impurity removal effect

Pending Publication Date: 2021-12-10
KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The demand for high-purity gold is increasing at a rate of more than 50% every year. Many methods can be used to produce 5N high-purity gold. For example, 5N gold can be produced by electrolytic refining, chemical reduction, and solvent extraction after using aqua regia. However, some methods are more cumbersome, and some The method investment is relatively large; for example, ① the traditional aqua regia liquid-making method has a short process and a fast chlorination refining process, but the product purity is not high, and chlorine gas is highly corrosive, so further electrolytic refining is often required; ② traditional chemical reduction methods It is difficult to obtain high-purity gold; ③Solvent extraction often requires multiple extractions, resulting in high pollution, high labor intensity, long production cycle and high cost

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

Embodiment 1

[0036]Prepare electrolytic cell (material is HPVC, specification is 1000mm×500mm×450mm), isolation tank (material is HPVC, specification is 470mm×420mm×60mm), cathode rod (composed of silver, specification is length 650mm×diameter 14mm), anode Filter bag, the filter bag is an insulating filter bag, 5N gold and 4N gold, the solution of the electrolytic cell is high-grade pure hydrochloric acid: deionized water = 1:4, the solution of the isolation tank is high-grade pure hydrochloric acid: deionized water =4:1; the isolation tank is located in the electrolytic tank, and the page in the isolation tank is 2cm higher than the liquid level in the electrolytic tank; the 5N gold is annealed, and after the treatment, it is pressed into a 5N gold sheet with a size of 550mm×100mm× 40mm, fix two 5N gold sheets on a cathode rod to form a cathode, place the cathode rod and 5N gold sheet in the electrolytic cell; press the 4N gold into a 4N gold sheet with a size of 550mm×100mm× 40mm, put th...

Embodiment 2

[0038] Prepare electrolytic cell (material is HPVC, specification is 1000mm×500mm×450mm), isolation tank (material is HPVC, specification is 470mm×420mm×60mm), cathode rod (composed of silver, specification is length 650mm×diameter 14mm), anode Filter bag, the filter bag is an insulating filter bag, 5N gold and 4N gold, the solution of the electrolytic cell is high-grade pure hydrochloric acid: deionized water = 1:4, the solution of the isolation tank is high-grade pure hydrochloric acid: deionized water =4:1; the isolation tank is located in the electrolytic tank, and the page in the isolation tank is 1.5cm higher than the liquid level in the electrolytic tank; the 5N gold is annealed, and after the treatment, it is pressed into a 5N gold sheet with a size of 550mm×100mm ×40mm, fix three 5N gold sheets on a cathode rod to form a cathode, place the cathode rod and 5N gold sheet in the electrolytic cell; press the 4N gold into a 4N gold sheet with a size of 550mm×100mm ×40mm, p...

Embodiment 3

[0040] Prepare electrolytic cell (material is HPVC, specification is 1000mm×500mm×450mm), isolation tank (material is HPVC, specification is 470mm×420mm×60mm), cathode rod (composed of silver, specification is length 650mm×diameter 14mm), anode Filter bag, the filter bag is an insulating filter bag, 5N gold and 4N gold, the solution of the electrolytic cell is high-grade pure hydrochloric acid: deionized water = 1:4, the solution of the isolation tank is high-grade pure hydrochloric acid: deionized water =4:1; the isolation tank is located in the electrolytic tank, and the page in the isolation tank is 1cm higher than the liquid level in the electrolytic tank; the 5N gold is annealed, and after the treatment, it is pressed into a 5N gold sheet with a size of 550mm×100mm× 40mm, fix two 5N gold sheets on a cathode rod to form a cathode, place the cathode rod and 5N gold sheet in the electrolytic cell; press the 4N gold into a 4N gold sheet with a size of 550mm×100mm× 40mm, put t...

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

No PUM Login to View More

Abstract

The invention relates to the technical field of preparation of high-purity gold, in particular to a preparation method of high-purity gold. The preparation method comprises the following steps: electrifying, combining current with an electrolyte solution to carry out oxidation-reduction reaction on an anode and a cathode, and carrying out atom and ion conversion between electrodes to generate the high-purity gold. Moreover, the trouble of silver on the high-purity gold is overcome during production, the environmental pollution and utilization are obviously reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of preparing high-purity gold, in particular to a preparation method of high-purity gold. Background technique [0002] High-purity gold has excellent physical and chemical properties, low and stable contact resistance, good electrical and thermal conductivity, easy bonding, easy film formation, and good adhesion to semiconductor substrates. [0003] High-purity gold forms AuGe, AuGeNi, AuBe, AuGa and other gold-based evaporation materials by adding elements, which can change its melting point, improve its wettability and adhesion with different materials, and can form ohmic contact with compound semiconductors. The key basic materials, whose product quality directly affects the performance of semiconductor devices, are widely used in industrial production such as LED (light emitting diode) lighting, solar cells, microwave semiconductor devices, electrodes and the Internet. In recent years, with the rapid de...

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): C25C1/20
CPCC25C1/20
Inventor 朱振华冯杰荣孔维龙蒋发权黄世盛
Owner KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD