Method of preparing oxidation methyl tin
A technology of methyl tin oxide and methyl tin chloride, which is applied in the direction of tin organic compounds, can solve problems such as difficult industrial production, alcohol safety, hidden danger conversion rate, etc., and achieve good product quality, stable quality, and no environmental pollution Effect
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Embodiment 1
[0020] Add 120g of monomethyl tin trichloride and 240g of water into a stirred reactor, stir until all solids are dissolved, raise the temperature to 50°C, slowly and uniformly add 606g of 10% aqueous sodium hydroxide solution dropwise, and the reaction time is 3 hours , the reaction temperature is controlled at 70°C, and the reaction is completed when the measured pH value is 8.0, the reaction solution is filtered, the filtrate is an aqueous solution of sodium chloride, the sodium chloride is recovered by dehydration, and the solid matter obtained after the filter cake is washed twice with water is dehydrated at 80°C Dry to obtain monomethyl tin oxide 81.1g, yield is 98.1%.
Embodiment 2
[0022] The monomethyl tin trichloride in embodiment 1 is replaced by dimethyl tin dichloride, consumes 10% aqueous sodium hydroxide solution is 441g, other conditions are constant, obtains dimethyl tin oxide 88.5g, yield is 98.5%.
Embodiment 3
[0024] The monomethyl tin trichloride in embodiment 1 is changed into monomethyl tin trichloride and dimethyl tin dichloride mixture, and its molar ratio is 25: 75, and concentration is 40% aqueous solution 300g, consumes 10 The % sodium hydroxide aqueous solution was 441g, and 88.5g of a mixture of monomethyl tin oxide and dimethyl tin oxide was obtained, and the yield was 98.5%.
[0025] In Example 1, the impact of different raw material concentrations, reaction temperature, alkali species, alkali concentration, reaction times, and pH value control on product quality and yield is shown in Table 1:
[0026] Table 1: Example data sheet of monomethyltin oxide produced from monomethyltin trichloride
[0027]
serial number
Monomethyltin trichloride and water
Amount to weight ratio
temperature reflex
℃
base name
Alkali concentration
Reaction time (h)
end of reaction
Point PH
yield ...
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Abstract
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