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Preparation method of nickel aminosulfonate

A technology of nickel sulfamate and sulfamic acid, which is applied in the electrolysis process and electrolytic components, can solve the problems of increasing the cost of nickel sulfamate, complex production process, slow reaction speed, etc., and achieve less impurity content and high product purity , fast response effect

Inactive Publication Date: 2010-11-10
宜兴方晶科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is to use nickel sulfide concentrate as raw material to prepare nickel sulfamate. The production process is complicated, and high-purity nickel sulfamate is prepared. The purification cost is high, and waste water is generated during the production process.
[0007] The above-mentioned preparation of nickel sulfamate by chemical method all has complicated process, slow reaction speed, and needs subsequent treatment to improve purity, increases the cost of preparing nickel sulfamate, and is accompanied by waste water generation

Method used

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  • Preparation method of nickel aminosulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: referring to accompanying drawing, electrolytic method prepares nickel sulfamate, in diaphragm type polypropylene outer frame electrolytic cell 1, oppositely set has the high-purity nickel plate anode 2 and negative electrode 3 that purity is 99.9wt%, and area is respectively 1dm 2 , the two electrodes are separated by a secondary amine anion membrane 4, and the distance between the anode and the cathode and the ion membrane is 3 cm, forming an anode chamber and a cathode chamber respectively. Add 200g of 50wt% sulfamic acid aqueous solution prepared in advance into the anode chamber, and 200g of 50wt% sulfamic acid aqueous solution into the cathode chamber, and electrolyze with 10A constant current. The anode nickel electrode is gradually reduced, and the cathode produces hydrogen gas. After electrolysis for a while, take a small amount of anolyte, titrate with a calibrated sodium hydroxide solution to determine the end point, stop the electrolysis, disc...

Embodiment 2-4

[0020] Embodiment 2-4: select nickel electrodes of different shapes according to Table 1, wherein in the granular nickel and powder nickel electrolysis devices, a plate-shaped graphite current collector is added, other experimental devices and process parameters are the same as in Example 1, and the electrolysis results are shown in Table 1. Show:

[0021] Table 1 Comparison of different forms of nickel electrodes

[0022] Example

[0023] Note: The results show that there is no significant difference in the electrolysis of electrodes with various shapes.

Embodiment 5-10

[0024] Examples 5-10: According to Table 2, different ion-exchange membranes were selected as diaphragm materials. Other experimental devices and process parameters were the same as in Example 1. The electrolysis results are shown in Table 2.

[0025] Table 2 Comparison table of different ion exchange membrane tests

[0026] Example

[0027] Example

[0028] Note: The results show that both anionic membrane and cationic membrane can be electrolyzed, but the anionic membrane has a better effect than the cationic membrane, and the effect of the quaternary ammonium salt anionic membrane and the secondary ammonium salt anionic membrane is better. High product concentration and high current efficiency.

[0029] Examples 11-16: Select different current densities for electrolysis according to Table 3, other experimental devices and process parameters are the same as in Example 1, and the electrolysis results are shown in Table 3.

[0030] Table 3 Comparison table...

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PUM

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Abstract

The invention relates to a method for directly preparing nickel aminosulfonate with an electrolysis method, which is characterized in that a nickel aminosulfonate solution is directly obtained by placing nickel in a sulfamic acid solution through electrolysis, wherein at least the anodes of an electrolysis cathode and an anode is nickel, the cathode and the anode are separated by an ion exchange membrane, and the electrolyte is a sulfamic acid water solution. Compared with a chemical synthesis method, the invention has the advantages of simple process, fast reaction, short production period, high purity of obtained products, less impurities, no need of additional separation and purification, simple post-treatment and low preparation cost, can directly obtain the nickel aminosulfonate water solution with required purity and concentration in one step by controlling the concentration of the electrolyte and the purity of the nickel, and is particularly suitable for preparing the nickel aminosulfonate water solution for accurate plating.

Description

technical field [0001] The invention improves the preparation method of nickel sulfamate, in particular relates to a method for preparing nickel sulfamate by electrolysis. Background technique [0002] Nickel sulfamate is an important nickel plating material in the surface treatment industry. The existing methods of synthesizing nickel sulfamate basically use chemical methods: for example: [0003] Nickel carbonate method, Soviet patent 452543 prepares nickel sulfamate with sulfamic acid and nickel carbonate. When producing nickel carbonate by this method, a variety of chemical raw materials need to be added, resulting in the introduction of a large amount of impurities, which affects the quality of the product and increases the subsequent purification cost; [0004] Catalytic oxidation method, U.S. Patent 3321273, 3620669, and Chinese patent CN85105950 metal sulfamate preparation method, while continuously adding hydrogen peroxide, sulfamate is added to the mixture of meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00
Inventor 韩彦东
Owner 宜兴方晶科技有限公司
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