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Preparation method of electronic grade high-purity nickel sulfamic acid solution

A pure nickel sulfamate, electronic grade technology, applied in the direction of sulfamic acid, nitrogen and non-metallic compounds, can solve the problem of high sulfate content, and achieve the effect of high product purity and low production cost

Active Publication Date: 2010-05-12
GUANGDONG GUANGHUA SCI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation method of the electronic grade high-purity nickel sulfamate solution of low sulfate content for the high shortcoming of sulfate content in the nickel sulfamate solution produced by existing carbonate method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Dissolve the industrial-grade nickel sulfate raw material and pure water in a mass ratio of 1:2. After the dissolution is complete, the specific gravity of the solution is 1.28g / ml, and then add activated carbon to the solution. The mass ratio of activated carbon to nickel sulfate is 1: 1000, boil the solution for 1 hour and stop heating, then filter the solution and concentrate the specific gravity of the solution d=1.60g / ml. Stop heating and concentrate, stir and cool the crystals to room temperature, and centrifuge the crystals to obtain refined nickel sulfate crystals.

[0025] 2. Prepare the above-mentioned nickel sulfate crystals and pure water into a solution containing 50g / L of nickel, and slowly add it into the ammonium carbonate solution with a concentration of 150g / L. When the pH value of the synthetic solution is between 7.0-8.0 Reaction to the end point, then the basic nickel carbonate is centrifuged, then the basic nickel carbonate and the sodium hydrox...

Embodiment 2

[0029] 1. Dissolve the industrial-grade nickel sulfate raw material and pure water at a mass ratio of 1:1.5. After the dissolution is complete, the specific gravity of the solution is 1.30g / ml. Add activated carbon to the solution, and the quality of activated carbon and nickel sulfate is controlled at 1:2000 After the solution was boiled for 1 hour, the heating was stopped, and then the solution was filtered and the specific gravity of the concentrated solution was d=1.62g / ml. Stop heating and concentrate, stir and cool the crystals to room temperature, and centrifuge the crystals to obtain refined nickel sulfate crystals.

[0030] 2. Prepare the above-mentioned nickel sulfate crystal and pure water into a solution containing 80g / L of nickel, slowly add it into the ammonium carbonate solution with a concentration of 250g / L, and wait until the pH value of the synthetic solution is between 7.0-8.0. Reaction to the end point, then the basic nickel carbonate is centrifuged, then ...

Embodiment 3

[0034] 1. Dissolve the industrial-grade nickel sulfate raw material and pure water at a mass ratio of 1:1.7. After the dissolution is complete, the specific gravity of the solution is 1.29g / ml. Add activated carbon to the solution, and the quality of activated carbon and nickel sulfate is controlled at 1:1500 After the solution was boiled for 1 hour, the heating was stopped, and then the solution was filtered and the specific gravity of the concentrated solution was d=1.61g / ml. Stop heating and concentrate, stir and cool the crystals to room temperature, and centrifuge the crystals to obtain refined nickel sulfate crystals.

[0035] 2. Prepare the above-mentioned nickel sulfate crystal and pure water into a solution containing 70g / L of nickel, slowly add it into the ammonium carbonate solution with a concentration of 200g / L, and wait until the pH value of the synthetic solution is between 7.0-8.0. Reaction to the end point, then the basic nickel carbonate is centrifuged, then ...

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Abstract

The invention relates to a preparation method of an electronic grade high-purity nickel sulfamic acid solution, comprising the following steps of: (1) dissolving industrial grade nickel vitriol raw materials in purified water, filtering and concentrating a solution for crystallization to obtain a refined nickel vitriol crystal; (2) preparing the obtained nickel vitriol crystal into the solution to react with sal volatile; (3) precipitating and putting prepared alkaline nickel carbonate in a sodium oxide solution, cooking and washing the alkaline nickel carbonate to be neutral by purified water; and (4) reacting the washed alkaline nickel carbonate with sulfamic acid to obtain the nickel sulfamic acid solution. The preparation method has the advantages of high product purity, lower contents of sulfate and sodium ions than those of products prepared by an ordinary carbonate method, simple process condition, easy control and low production cost.

Description

technical field [0001] The invention belongs to the field of chemical production, in particular to a method for preparing an electronic-grade high-purity nickel sulfamate solution. Background technique [0002] Nickel plating occupies an important position in the electroplating industry and is widely used in protective decoration and functional electroplating. Nickel sulfamate is the main salt of nickel electroplating that has developed rapidly in the world in recent years. It has the characteristics of fast deposition speed, low internal stress of the coating, fine crystallization, good dispersion of plating solution, and flexible and thick coating with low stress. , is widely used in electroforming, dimensional repair, nickel plating before printing and gold plating, and rapid automated production. The process of using nickel sulfamate as the main salt of nickel plating is incomparable with the process of using nickel chloride and nickel sulfate as the main salt. In the ...

Claims

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Application Information

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IPC IPC(8): C01B21/096
Inventor 谭泽黄司平王刊谭岁月
Owner GUANGDONG GUANGHUA SCI TECH
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