Preparation method of hydrofluoroether cleaning agent
A technology of cleaning agent and hydrofluoroether, which is applied in the field of preparation of hydrofluoroether cleaning agent, can solve the problems of high toxicity, high yield of solid waste, etc., and achieve the effects of increased yield, easy purification, and less by-products
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Embodiment 1
[0052]A preparation method of a hydrofluoroether cleaning agent, the method steps are as follows:
[0053] (1) Using 1582g of isobutyric anhydride as raw material, react with 260g of lithium fluoride in 2L of ethylene glycol dimethyl ether, the reaction temperature is 0°C, the pressure is normal pressure, and the reaction time is 1h. After the reaction is complete, distill at normal pressure , collecting fractions at 86°C to obtain 850 g of isobutyryl fluoride;
[0054] Using 1582g of n-butyric anhydride as raw material, react with 260g of lithium fluoride in 2L of ethylene glycol dimethyl ether, the reaction temperature is 0°C, the reaction pressure is normal pressure, and the reaction time is 1h. After the reaction is complete, distill at normal pressure and collect 86°C fraction to obtain 850 g of n-butyryl fluoride.
[0055] (2) 850g of isobutyryl fluoride obtained in step (1) is mixed with 460g of n-butyryl fluoride according to a mass ratio of 13:7, and then added to a ...
Embodiment 2
[0067] A preparation method of a hydrofluoroether cleaning agent, the method steps are as follows:
[0068] (1) With 1060g isobutyryl chloride as raw material, react with 420g sodium fluoride in 2L diethylene glycol dimethyl ether, the reaction temperature is 50°C, the reaction pressure is normal pressure, and the reaction time is 12h. After the reaction is complete, usually Pressure distillation, collecting fractions at 86°C to obtain isobutyryl fluoride;
[0069] Using 1060g of n-butyryl chloride as raw material, react with 420g of sodium fluoride in 2L of diethylene glycol dimethyl ether, the reaction temperature is 50°C, the reaction pressure is normal pressure, and the reaction time is 12h. After the reaction is complete, normal pressure distillation, Fractions at 86°C were collected to obtain n-butyryl fluoride.
[0070] (2) The 850g isobutyryl fluoride obtained in step (1) is mixed with 460g n-butyryl fluoride according to the mass ratio of 13:7, and then added to the ...
Embodiment 3
[0082] A preparation method of a hydrofluoroether cleaning agent, the method steps are as follows:
[0083] (1) With 1510g of isobutyryl bromide as raw material, react with 580g of potassium fluoride in 2L of tetraethylene glycol dimethyl ether, the reaction temperature is 100°C, the reaction pressure is normal pressure, and the reaction time is 24h. After the reaction is complete, Atmospheric distillation, collecting fractions at 86°C to obtain isobutyryl fluoride;
[0084] Using 1510g of n-butyryl bromide as raw material, react with 580g of potassium fluoride in 2L of tetraethylene glycol dimethyl ether, the reaction temperature is 100°C, the reaction pressure is normal pressure, and the reaction time is 24h. After the reaction is complete, distill under normal pressure , Collect the fraction at 86°C to obtain n-butyryl fluoride.
[0085] (2) The 850g isobutyryl fluoride obtained in step (1) is mixed with 460g n-butyryl fluoride according to the mass ratio of 13:7, and then...
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