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Non-cyanide gilding saline solution

A technology of cyanide-free gold plating and salt solution, which is applied in the field of preparation of cyanide-free gold-plating salt solution, and can solve problems such as potential safety hazards, environmental pollution, and stability restrictions.

Inactive Publication Date: 2010-06-09
长沙铂鲨环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the processing process of industries such as printed circuit boards (abbreviated as PCB), electroplating, metal powder, nano-materials and catalyst manufacturing, it is often necessary to use a gold-containing solution, but at present this kind of gold-containing solution is based on the gold-containing cyanide Potassium cyanide is mainly used, which has great potential safety hazards and environmental pollution problems in the production and use process
Although there are products of gold sulfite and its solution, its stability limits its use

Method used

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Examples

Experimental program
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Embodiment 1

[0014] Prepare 900 milliliters of a mixture of 200 grams of aminoacetic acid and several grams of deionized water, adjust its pH to 9.5-10.2 with 35% sodium hydroxide solution, and finally fill it with deionized water to 1 liter, and place the solution in The cathode area and anode area of ​​the IEMEC device as shown in the attached figure, wherein ① is a DC power supply, ② is a gold anode, ③ is a cathode plate, ④ is a cation exchange membrane, ⑤ is a wire, ⑥ is an IEMEC tank, and the cathode plate is made of 30 square centimeter stainless steel plate, the anode is 20 square centimeter gold, adjust the output voltage of the DC power supply at 12V±0.5V, keep the temperature of the solution in the cathode and anode areas in the range of 40-55°C, and test the solution in the anode area after 6 hours. The gold concentration is greater than 0.5 g / L, which means that the gold solution without cyanide can be prepared by this method.

Embodiment 2

[0016] Prepare 900 milliliters of a mixture consisting of 75 grams of aminoacetic acid, 75 grams of sulfoalanine, 50 grams of glutamic acid, 50 grams of potassium hydroxide and several grams of deionized water, and adjust its pH to 9.1-10.3, finally fill up to 1 liter with deionized water, and place the liquid in the cathode area and anode area of ​​the IEMEC device as shown in the attached figure, where ① is a DC power supply, ② is a gold anode, and ③ is a cathode plate , ④ is a cation exchange membrane, ⑤ is a wire, ⑥ is an IEMEC tank body, the cathode plate is made of 25 square centimeter stainless steel plate, the anode is 25 micron thick and 25 square centimeter gold foil, and the output voltage of the adjustable DC power supply is in the range of 9V-11.5 , keep the temperature of the solution in the anode and cathode regions below 50°C, and after 8 hours, the anode region solution is detected to find that its gold concentration reaches 0.6 grams per liter, indicating that...

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Abstract

The invention relates to a method for preparing non-cyanide gilding saline solution. The gold of the non-cyanide gilding saline solution exists in a state of water-soluble ions; and a ligand (a complexing agent) which coordinates the gold is a material of amino acids. The non-cyanide gilding saline solution can be prepared by adopting IEMEC technology, and can be used in the industries of PCBs (printed circuit boards), metal plating, catalyst manufacture, metal powder, nano materials and the like.

Description

technical field [0001] The invention relates to a preparation method of a cyanide-free gold-plating salt solution. The gold in the cyanide-free gold-plating salt solution exists in a water-soluble ion state, and the ligand (complexing agent) coordinated with the gold is an amino acid substance. IEMEC (ionized membrane electrolysis) can be used to prepare cyanide-free gold plating salt solution, which can be used in PCB (printed circuit board), metal plating, catalyst manufacturing, metal powder and nano-material industries. Background technique [0002] In the processing process of industries such as printed circuit boards (abbreviated as PCB), electroplating, metal powder, nanomaterials and catalyst manufacturing, it is often necessary to use a solution containing gold, but at present this kind of solution containing gold is based on the sub-gold containing cyanide Potassium cyanide is the main product, which has great potential safety hazards and environmental pollution pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/48
Inventor 李德良张云亮张建国
Owner 长沙铂鲨环保设备有限公司
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