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Method for preparing gold salt activator

A technology of activator and gold salt, which is applied in the direction of photographic process, instrument, photographic auxiliary process, etc., can solve the problems of terminal electronic product quality improvement, narrow application area, large loss, etc., and achieve the goal of reducing electrolysis time and purification Effect of time and frequency, reduction of mother liquor, and reduction of water content

Inactive Publication Date: 2010-06-02
吴朝勤
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Problems solved by technology

[0002] Present general adopt gold sulfate method and gold potassium cyanide membrane electrolysis method to prepare gold salt activator, their technological process is generally: pure gold powder cation exchange membrane collects mother liquor, filters crystallization and washes and dries, because is the irregular particle precipitation, for Powder, its disadvantages are large loss, fast volatility, high water content, poor utilization rate, narrow application range, and the quality of terminal electronic products cannot be improved.

Method used

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  • Method for preparing gold salt activator
  • Method for preparing gold salt activator

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Embodiment Construction

[0008] exist figure 1 Among them, the present invention is a preparation method of a gold salt activator, which includes the following steps: Step 1, first select the raw material, the raw material is gold, and the gold is processed into a gold sheet by a rolling machine; Step 2, Then put the gold sheet into the electrolytic cell with potassium cyanide solution for electrolysis, add electrolyte iron, cobalt, nickel, copper and lead during electrolysis, the amount of iron, cobalt, nickel, copper and lead added is less than or equal to the electrolytic solution 0.0005% of the mass, the initial voltage during electrolysis is 2.8-3.2 volts, the later stage voltage is 6 volts, the electrolysis current is 15-30 milliamperes, and the mass percentage of gold flakes and potassium cyanide in the electrolytic tank is 1: 1.04, gold The sheet is used as the anode, and the gold sheet at the anode is electrolyzed into KAu(CN) 2 , the exhaust gas produced after electrolysis is sent to the wa...

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Abstract

The invention discloses a method for preparing a gold salt activator, which comprises the following steps: firstly, performing lamination treatment on gold to form a gold sheet; secondly, putting the gold sheet into an electrolytic tank filled with solution of potassuim cyanide for electrolysis, taking the gold sheet as an anode and electrolyzing the anode gold sheet into KAu(CN)2; thirdly, performing freezing crystallization on the electrolyzed solution of KAu(CN)2 in the electrolytic tank to obtain solution containing KAu(CN)2 crystals, filtering through a filter membrane filter, washing the filtered KAu(CN)2 with water, performing the secondary freezing crystallization and secondary filtration, heating and dissolving the filtered KAu(CN)2, performing the third filtration on the dissolved solution with the filter membrane filter, performing the third freezing crystallization on the filtered KAu(CN)2 solution, and filtering to obtain KAu(CN)2 crystals; and finally, directly baking and drying the KAu(CN)2 crystals to obtain KAu(CN)2 particles.

Description

technical field [0001] The invention relates to a preparation method of a gold salt activator Background technique [0002] Present general adopt gold sulfate method and gold potassium cyanide membrane electrolysis method to prepare gold salt activator, their technological process is generally: pure gold powder cation exchange membrane collects mother liquor, filters crystallization and washes and dries, because is the irregular particle precipitation, for Powder, its disadvantages are large loss, fast volatility, high water content, poor utilization rate, narrow application range, and the quality of terminal electronic products cannot be improved. Contents of the invention [0003] The invention relates to a preparation method of a gold salt activator, which can not only shorten the electrolysis time and the number of purifications, but also improve the purity and yield of the product, and at the same time, the product changes from powder to granule, which is convenient f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/20
Inventor 吴朝勤
Owner 吴朝勤
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