Temperature controlled phase inversion separation method of silicon tetrachloride and trichlorosilane in ionic liquid
A technology of ionic liquid and silicon tetrachloride, which is applied in the field of using ionic liquid to separate chlorosilane liquid mixture and ionic liquid to separate liquid mixture, can solve the problems of low separation efficiency, difficult separation of each component of chlorosilane mixture, etc. The method is simple, low cost, no pollution effect
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Embodiment 1
[0033] Step 1: In a vacuum glove box, take 50 g of 1-butyl-3-methylimidazole bis-trifluoromethanesulfonyl imide salt ionic liquid and put it into a 200 ml jacketed glass reactor equipped with a condenser, Put in the stirring magnet and seal it with a silicone plug;
[0034] Step 2: Pass 5°C circulating water into the reactor jacket, and keep the equilibrium temperature of the liquid phase in the jacketed glass reactor at 5°C through the temperature controller; take another 75g of silicon tetrachloride and trichlorosilane mass ratio A 70:30 mixture of chlorosilanes was slowly added to the lower part of the ionic liquid in the jacketed glass reactor by injection, the stirring was started, the temperature of the liquid in the reactor was controlled at 5°C, and the stirring speed was 200 rpm for 5 h; the stirring was stopped , keep the temperature at 5°C, and let it stand for 2 hours, a double liquid phase with a clear interface appears in the jacketed glass reactor;
[0035]Step...
Embodiment 2
[0039] Step 1: In a vacuum glove box, take 50 g of 1-butyl-3-methylimidazolium dicyanamide salt ionic liquid, put it into a 200 ml jacketed glass reactor equipped with a condenser, and put a stirring magnet , sealed with a silicone plug;
[0040] Step 2: Pass 15°C circulating water into the reactor jacket, and keep the equilibrium temperature of the liquid phase in the jacketed glass reactor at 15°C through the temperature controller; take another 100g of silicon tetrachloride and trichlorosilane mass ratio It is an 80:20 mixture of chlorosilanes, which is slowly added to the lower part of the ionic liquid in the jacketed glass reactor by injection, and the stirring is started, and the temperature of the liquid in the reactor is controlled at 15°C, and stirred at a speed of 300 rpm for 8 h; the stirring is stopped , keep the temperature at 15°C and let it stand for 4 hours, a double liquid phase with a clear interface appears in the jacketed glass reactor;
[0041] Step 3: Ca...
Embodiment 3
[0045] Step 1: In a vacuum glove box, take 50 g of 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid, put it into a 200 ml jacketed glass reactor equipped with a condenser, and put it into a stirring magnetic sealed with a silicone plug;
[0046] Step 2: Pass 10°C circulating water into the reactor jacket, and keep the equilibrium temperature of the liquid phase in the jacketed glass reactor at 10°C through the temperature controller; take another 87.5g of silicon tetrachloride and trichlorosilane The chlorosilane mixture with a ratio of 75:25 was slowly added to the lower part of the ionic liquid in the jacketed glass reactor by injection, and the stirring was started. The temperature of the liquid in the reactor was controlled at 10°C, and the stirring was performed at a speed of 250 rpm for 6.5 h; Stir, keep the temperature at 10°C, and let it stand for 3 hours, a double-layer liquid phase with a clear interface appears in the jacketed glass reactor;
[0047] Step...
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