Method for preparing stannous sulfamate solution and application thereof

A technology of stannous sulfamic acid and sulfamic acid, which is applied in the directions of sulfamic acid, nitrogen and non-metallic compounds, can solve the problems of difficult to handle barium sulfate by-products, difficult product quality requirements, difficult control of reaction end points, etc. The effect of less impurity ions, low cost and low energy consumption

Active Publication Date: 2012-01-04
GUANGDONG GUANGSHI REAGENTS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the common defect of these two kinds of methods is that operation cycle is long, impurity ion is many and is difficult to handle, pollutes environment, and product quality is difficult to reach the quality requirement of industry electroplating process to tin sulfamate; Especially (2) kind of method, reaction The end point is difficult to control, the barium salt is toxic, and a large amount of barium sulfate by-products are difficult to handle

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  • Method for preparing stannous sulfamate solution and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 134 grams of stannous oxide in a 2000 mL beaker, add 500 mL of pure water and stir to wash off the surface impurities, pour off the upper layer after sinking for a while, add 204 grams of sulfamic acid, 500 grams of pure water, Diphenol, 0.2 g of tartaric acid, heated to 60° C. and stirred (125 r / min) for 3 hours to dissolve completely, then added 1 g of activated carbon, filtered after 30 minutes of adsorption, and obtained the filtrate. After measuring the content 417g / L of stannous sulfamate in the filtrate, add the stannous sulfamate solution of pure water preparation 300g / L (in terms of stannous sulfamate). The solution after the deployment is tested again, and the concentration of this stannous sulfamate solution is 301.2g / L (in terms of stannous sulfamate), and the content of metal impurities Fe, Pb, Zn, Cu, Co, Cd, Mn is even <10ppm.

Embodiment 2

[0035] Weigh 134 grams of stannous oxide in a 2000 mL beaker, add 500 mL of pure water to stir and wash off the surface impurities, pour off the upper layer after sinking for a period of time, add 214 grams of sulfamic acid, 500 grams of pure water, and 0.5 grams of hydroxylamine hydrochloride , 0.2 grams of tartaric acid, heated to 70 ° C and stirred (150r / min) for 4 hours to make it completely dissolved, added 1.5 grams of activated carbon, filtered after 30 minutes of adsorption, and the filtrate was taken. After measuring the content 422g / L of stannous sulfamate in the filtrate, add the stannous sulfamate solution of pure water preparation 300g / L (in terms of stannous sulfamate). The solution after the deployment is tested again, and the concentration of this stannous sulfamate solution is 300.8g / L (in terms of stannous sulfamate), and the content of metal impurities Fe, Pb, Zn, Cu, Co, Cd, Mn is even. <10ppm.

Embodiment 3

[0037] Weigh 134 grams of stannous oxide in a 2000 mL beaker, add 500 mL of pure water and stir to wash off the surface impurities, pour off the upper layer after sinking for a period of time, add 213 grams of sulfamic acid, 500 grams of pure water, 0.5 grams of m-benzene Diphenol, 0.2 gram of tartaric acid, heated to 90 DEG C and stirred (100r / min) to react for 2 hours to make it completely dissolved, add 1 gram of activated carbon, filter after 30 minutes of adsorption, take the filtrate, and measure the content of stannous sulfamate in the filtrate 407g / L, add pure water to prepare 300g / L (calculated as stannous sulfamate) stannous sulfamate solution. The solution after the deployment is tested again, and the concentration of this stannous sulfamate solution is 300.5g / L (in terms of stannous sulfamate), and the content of metal impurities Fe, Pb, Zn, Cu, Co, Cd, Mn is even. <10ppm.

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Abstract

This invention discloses a method for preparing stannous sulfamate solution and an application thereof. The method comprises the following steps of: (1) taking stannous oxide, and adding pure water for rinsing; (2) mixing sulfamic acid and cleaned stannous oxide, and adding pure water, reducing agent and tartaric acid; heating the mixture to 60-90 DEG C, agitating and reacting for 2-4 hours to obtain solution A; (3) adding active carbon to the solution A, absorbing for 0.5-1.5 hours before filtering, and taking filtrate; (4) testing the content of stannous sulfamate in the filtrate and addingpure water to prepare the tin sulfamate solution with the needed concentration. The stannous sulfamate solution prepared by the method is high in purity and less in impurity ions; the preparation method provided by the invention has the advantages of simple process, less energy consumption, low cost and small pollution on the environment; and the method overcomes the disadvantages of the traditional method as follows: the operation cycle is long, the impurity ions are many and are difficult to treat, and the environment is polluted.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation method and application of stannous sulfamate solution. Background technique [0002] As sulfamic acid is widely used in the field of electroplating, the synthesis of stannous sulfamate has attracted more and more attention. Tin sulfamate is a new type of electroplating material, which has the advantages of good quality electroplating products, fast electroplating speed, and small internal stress of the coating, which can improve the performance of the coating, especially the bending resistance of the coating, and make the surface of the coating more Bright and smooth. The electroplating solution with tin sulfamate as the main salt has the advantages of stable solution, low toxicity, low corrosion, low foaming, and excellent coating quality. It is widely used in tin plating, brush plating technology, and bath plating of electronic components. etc. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/096
Inventor 李帅王保金谷芳芳刘红梅
Owner GUANGDONG GUANGSHI REAGENTS TECH
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