Treatment method for avoiding yellowing of stannous methanesulfonate

A technology of stannous methanesulfonate and its treatment method, which is applied to the preparation of sulfonate, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of stannous methanesulfonate oxidation and yellowing, and improve the product quality. Quality, avoid yellowing effect

Active Publication Date: 2013-05-15
广西华锡集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to solve the problem of yellowing of stannous methanesulfonate by oxidation, and to provide a treatment method for avoiding its yellowing in the production of stannous methanesulfonate

Method used

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  • Treatment method for avoiding yellowing of stannous methanesulfonate
  • Treatment method for avoiding yellowing of stannous methanesulfonate
  • Treatment method for avoiding yellowing of stannous methanesulfonate

Examples

Experimental program
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Effect test

Embodiment 1

[0035] at 1.5m 3 Add 100kg tin flower, 400L 99% methanesulfonic acid, 50L mother liquor, and add 0.7kg hydroquinone to the reaction kettle, and stir, and react for 5h at a vacuum of 0.01MPa and a temperature of 110°C. The solution that reaction obtains is put in the crystallization jar, is cooled to room temperature, then the crystal that obtains is carried out centrifugal drying, obtains the stannous methanesulfonate crystal of 89kg, by W (CH3SO3)2Sn :W H2O :W CH3SO3H :W 抗氧化剂 =160:90:2:0.5 ratio is made into an aqueous solution, stirred and dissolved, filtered to obtain 50.3% stannous methanesulfonate, and packed to obtain a clear and transparent stannous methanesulfonate finished product, the finished product has no hair Yellow phenomenon; Simultaneously, the mother liquor after the crystallization returns in the described reactor and reacts.

Embodiment 2

[0037] at 1.5m 3 Add 100kg of tin powder, 400L of 99% methanesulfonic acid, 40L of mother liquor, add 0.7kg of hydroquinone, and stir, and react for 6h under the condition of vacuum degree of 0.015MPa and temperature of 140°C. The solution that reaction obtains is put in the crystallization tank, is cooled to room temperature, then the crystal that obtains is carried out centrifugal drying, obtains the stannous methanesulfonate of 80kg to carry out, press W (CH3SO3)2Sn :W H2O :W CH3SO3H :W 抗氧化剂 The ratio of =160:90:3:0.85 is made into an aqueous solution, stirred and dissolved, filtered to obtain 51.8% stannous methanesulfonate product, and packaged to obtain a clear and transparent stannous methanesulfonate finished product, which has no Yellowing phenomenon; at the same time, the mother liquor after crystallization is put into the groove that tin flower is housed.

Embodiment 3

[0039] at 1.5m 3 Add 100kg of tin particles, 400L of 99% methanesulfonic acid, 60 L of mother liquor, add 0.7kg of hydroquinone, stir, and react for 10h at a vacuum of 0.02MPa and a temperature of 180°C. The solution that reaction obtains is put in the crystallization jar, is cooled to room temperature, then the crystal that obtains is carried out centrifugal drying, obtains the stannous methanesulfonate crystal of 73kg, by W (CH3SO3)2Sn :W H2O :W CH3SO3H :W 抗氧化剂 The ratio of =160:90:4:1 is made into an aqueous solution, stirred and dissolved, filtered to obtain 50.6% stannous methanesulfonate product, and packaged to obtain a clear and transparent stannous methanesulfonate finished product, which has no Yellowing phenomenon; Simultaneously, the mother liquor after the crystallization returns in the described reactor to react.

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Abstract

The invention relates to a treatment method for avoiding yellowing of stannous methanesulfonate, which comprises the following steps of: adding phenol antioxidant into a reaction kettle for a synthetic reaction; in a preparation stage, adding phenol antioxidant into a preparation solution, wherein W(CH3SO3)2Sn:WH2O:WCH3SO3H:W antioxidant=160:90:(2-4):(0.5-1.0); and returning the crystallized mother liquid to the reaction kettle or putting the crystallized mother liquid into a tank with tin flower. According to the invention, the oxidation of bivalent tin ions and consequent product yellowing can be avoided by use of the antioxidant; and tetravalent tin ions implement a chemical reaction at certain acidity and in the presence of tin metal, and the product fades so as to avoid the phenomenon of yellowing of stannous methanesulfonate in the production process and improve the product quality.

Description

[0001] technical field [0002] The invention relates to a treatment method for avoiding the yellowing of stannous methanesulfonate, which is applied in the production of stannous methanesulfonate. Background technique [0003] The electroplating solution with tin methanesulfonate 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. As an environmentally friendly electroplating solution, stannous methanesulfonate electroplating solution has been widely used in developed countries and regions, and my country has also partially adopted or gradually switched to tinning with stannous methanesulfonate electroplating solution. [0004] At present, when industrially producing stannous methanesulfonate, tin metal and methanesulfonic acid are mainly used as raw materials and produced by chemical synthe...

Claims

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Application Information

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IPC IPC(8): C07C309/04C07C303/32C07C303/42
Inventor 叶有明谢雪珍吴伯增阮桦陈进中伍祥武林家伟张诚芦丹燕凌宏光杨康
Owner 广西华锡集团股份有限公司
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