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Tin methanesulfonate preparation method

A technology of tin methane sulfonate and methane sulfonic acid, applied in the chemical industry, can solve the problems of waste of precious metals, environmental pollution, loss of activity, etc., and achieve the effects of less equipment investment, no environmental pollution, and simple process

Inactive Publication Date: 2015-11-18
HUBEI XINGHUO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They lose their activity after being used for a period of time and become waste, which will cause serious environmental pollution and waste precious precious metals.

Method used

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  • Tin methanesulfonate preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing tin methanesulfonate, such as figure 1 As shown, including the following steps:

[0037] Take 200 grams of the copper methanesulfonate catalyst discarded after the synthesis of apple ester, wash it with ethanol several times, and evaporate to obtain 180 grams of organic copper methanesulfonate solid.

[0038] Dissolve the above-mentioned 180 grams of copper methanesulfonate solid in 655 grams of demineralized water, and add 65 grams of 70wt% methanesulfonic acid solution and 2.5 grams of resorcinol to prepare a 20wt% copper methanesulfonate solution. , Place the configured blue transparent liquid in a 2000mL anticorrosive container.

[0039] Put 200 grams of tin particles in the above copper methanesulfonate solution. And under vacuum conditions, constant stirring to make the displacement reaction proceed.

[0040] After 24 hours of reaction, the blue solution became a colorless solution, and gray-black powder was produced at the bottom of the reaction ...

Embodiment 2

[0042] A method for preparing tin methanesulfonate, such as figure 1 As shown, including the following steps:

[0043] Take 300 grams of the copper methanesulfonate catalyst discarded after the synthesis of apple ester, wash it with ethanol several times, and evaporate to obtain 256 grams of copper methanesulfonate solid without organic matter.

[0044] Dissolve the above-mentioned 256 grams of copper methanesulfonate solid in 931 grams of demineralized water, and add 90 grams of 70wt% methanesulfonic acid solution and 3 grams of resorcinol to prepare a 20wt% copper methanesulfonate solution , Place the configured blue transparent liquid in a 2000mL anticorrosive container.

[0045] Put 300 grams of tin particles in the copper methanesulfonate solution. And keep stirring to make the displacement reaction proceed.

[0046] After reacting for 20 hours, the blue solution became a colorless solution. At the same time, gray-black powder was produced at the bottom of the reaction vessel,...

Embodiment 3

[0048] A method for preparing tin methanesulfonate, such as figure 1 As shown, including the following steps:

[0049] Take 220 grams of discarded silver methanesulfonate catalyst, wash it with ethanol, etc., and evaporate to obtain 205 grams of silver methanesulfonate solid.

[0050] The above-mentioned silver methanesulfonate was dissolved in 470 g of demineralized water, while 95 g of 70 wt% methanesulfonic acid solution was added, and 2 g of resorcinol was added. Place the prepared silver methanesulfonate solution in a 1000ml glass container and stir to react. After 18 hours, the silver ion content in the test solution was less than 5 ppm. The reaction is over. 306 grams of 50.2 wt% tin methanesulfonate solution was obtained, and 105 grams of silver powder was recovered.

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Abstract

The invention relates to a tin methanesulfonate preparation method and belongs to the technical field of chemical engineering. The preparation method comprises removing a small amount of organic matters in a waste methyl sulfonate catalyst by a two-phase separation method to obtain refined methyl sulfonate solids, dissolving the refined methyl sulfonate solids in water to obtain a methyl sulfonate solution with content of 20-45%, adding 5-10wt% of a methanesulfonic acid solution and 0.25-1wt% of a tin off-color preventing agent into the methyl sulfonate solution, then adding tin into the methyl sulfonate solution so that a displacement reaction occurs, carrying out solid-liquid separation on the product solution, filtering the separated liquid, and concentrating the filtrate to obtain a tin methanesulfonate solution finished product. The tin methanesulfonate preparation method has the advantages of less equipment investment, simple processes, no environmental pollution, high product purity, full utilization of waste methanesulfonate and recycle.

Description

Technical field [0001] The invention belongs to the technical field of chemical engineering, and specifically relates to a method for preparing tin methanesulfonate. Background technique [0002] Tin methanesulfonate is currently the main raw material for tin electroplating, tin alloy electroplating, electroless tin plating, and electroless tin alloy plating. Tin plating and tin alloy on metal surfaces are currently important processes in the production of electronic components and printed circuit boards. With the rapid development of the electronics industry, the demand for tin methane sulfonate is growing. The combination of tin methanesulfonate and methanesulfonic acid is called the methanesulfonic acid electroplating system. Compared with the previous fluoroboric acid system and sulfuric acid system, it has great advantages: its electroplating wastewater is relatively easy to treat; The coating quality is stable and reliable; it can realize high-speed electroplating, improv...

Claims

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Application Information

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IPC IPC(8): C07C309/04C07C303/32C07C303/42
Inventor 汪志君曾丹田
Owner HUBEI XINGHUO CHEM
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