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

Method for treating excessive carbonate in cyanogens-containing gold plating solution

A treatment method and carbonate technology, applied in the electrolysis process, cells, electrolysis components, etc., can solve the problems of solution loss, rough coating crystallization, removal of potassium carbonate, etc., to save production costs, reduce gold loss, and operate equipment. simple effect

Inactive Publication Date: 2014-06-04
郯城佳明化工有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] First, the crystallization of the coating is rough and the bonding force is poor;
[0009] Second, anode passivation reduces plating efficiency;
[0010] Third, the uniformity of the coating is poor and the surface quality is reduced
[0011] Therefore need to reduce potassium carbonate content in the solution in time, but potassium carbonate solubility is high in the cyanidation gold-plating solution, can't adopt freeze-precipitation method to remove potassium carbonate, adopt the method for diluting gold-plating solution to reduce potassium carbonate content mostly in the traditional method, and this method must Scrap part of the gold-plating solution, resulting in a large loss of solution and high production costs

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

[0035] Certain electroplating gold plating solution 100L, potassium carbonate content is 62g / L, after treatment, potassium carbonate content is reduced to 25g / L.

[0036] Prepare two clean treatment pools A and B of suitable size;

[0037] 1) Pumping the cyanide-containing gold-plating solution into the treatment pool A, the volume of the gold-plating solution is no more than 2 / 3 of the volume of the treatment pool A, and then detecting the content W of potassium carbonate in the cyanide-containing gold-plating solution;

[0038] 2) Calculate the amount U of the precipitating agent according to W, then the precipitating agent with a total amount of U is dissolved in deionized water to obtain a precipitating agent solution, the precipitating agent is analytically pure barium chloride, and the precipitating agent solution is continuously stirred Add in the gold-plating solution in the treatment pond A;

[0039] 3) After the precipitant solution is completely added, stir for 1 h...

Embodiment 2

[0048] A certain electroplating gold plating solution is 100L, and the content of potassium carbonate is 62g / L. After treatment, the content of potassium carbonate is reduced to 25g / L. After calculation, Ba(CN) 2 The mass is about 5.2kg.

[0049] Prepare two clean treatment pools A and B of suitable size;

[0050] 1) Pumping the cyanide-containing gold-plating solution into the treatment pool A, the volume of the gold-plating solution is no more than 2 / 3 of the volume of the treatment pool A, and then detecting the content W of potassium carbonate in the cyanide-containing gold-plating solution;

[0051] 2) Calculate the amount U of the precipitating agent according to W, then dissolve the precipitating agent solution that the total amount is U with deionized water to obtain the precipitating agent solution, the precipitating agent is analytically pure barium cyanide, and the precipitating agent solution is continuously stirred Add in the gold-plating solution in the treatmen...

Embodiment 3

[0058] A certain electroplating gold plating solution is 100L, and the content of potassium carbonate is 62g / L. After the treatment, the content of potassium carbonate is reduced to 25g / L. After calculation, Ba(OH) 2 The mass is about 4.6kg.

[0059] Prepare two clean treatment pools A and B of suitable size;

[0060] 1) Pumping the cyanide-containing gold-plating solution into the treatment pool A, the volume of the gold-plating solution is no more than 2 / 3 of the volume of the treatment pool A, and then detecting the content W of potassium carbonate in the cyanide-containing gold-plating solution;

[0061]2) Calculate the amount U of the precipitating agent according to W, then the precipitating agent with a total amount of U is dissolved in deionized water to obtain a precipitating agent solution, the precipitating agent is analytically pure barium hydroxide, and the precipitating agent solution is continuously stirred Add in the gold-plating solution in the treatment pool...

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 discloses a method for treating excessive carbonate in a cyanogens-containing gold plating solution, wherein a chemical precipitation method is adopted to decrease the content of the carbonate in the gold plating solution. In the method, precipitators, such as barium hydroxide, barium cyanide, barium chloride and the like, are used for undergoing a chemical reaction with the excessive carbonate (with potassium carbonate as a major part) in the gold plating solution to generate barium carbonate and other substance precipitates, and the precipitates are filtered to decrease the content of the carbonate in the gold plating solution. According to the method, the precipitators, such as the barium hydroxide, the barium cyanide, the barium chloride and the like, can be used for effectively decreasing the content of the carbonate in the gold plating solution without influencing the performance of the plating solution; equipment is simple to operate, an operation process is easy to implement, and an operation method is low in cost; and compared with the traditional method for reducing the content of the carbonate by diluting the gold plating solution, the method disclosed by the invention can be used for effectively reducing gold losses and saving production cost.

Description

technical field [0001] The invention relates to a treatment method for excessive carbonate in a cyanide-containing gold plating solution. Background technique [0002] Gilding refers to plating a thin layer of gold on the surface of utensils. According to its process characteristics, there are two kinds of gold plating without cyanide and gold plating with cyanide. Because cyanide is toxic and pollutes the environment, the country restricts the use of cyanide-containing electroplating. [0003] However, cyanide-containing gold plating has the following advantages: [0004] First, the bath is stable and has strong resistance to impurities; [0005] Second, the coating is dense, bright in color, good in adhesion, wear-resistant and excellent in performance; [0006] Third, the wastewater treatment is simple and thorough, and the treatment cost is low. [0007] Therefore, in the past hundred years, many cyanide-free gold plating systems still cannot replace cyanide-contain...

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 Patents(China)
IPC IPC(8): C25D21/18C25D3/48
Inventor 孙军艳杨炜盛强
Owner 郯城佳明化工有限公司