Technology for synthesizing fluoroethylene carbonate with fluosilicic acid

The invention discloses a technology for synthesizing fluoroethylene carbonate with fluosilicic acid. The technology comprises the steps of heating up the ethylene carbonate to 48-52DEG C, adding fluosilicic acid to obtain mixed liquor I, heating up the mixed liquor to 55-70DEG C, keeping at constant temperature, dripping a phase shift catalyst, then dripping an amine catalyst to obtain mixed liquor II, filtering impurities in the mixed liquor II, heating up the filtrate to 60-75DEG C, reacting at constant temperature, cooling, dehydrating and filtering impurities, and collecting the reaction liquid through distillation, so as to obtain the finished product- fluoroethylene carbonate. The technology has the advantages of simple steps, easy operation, small investment in production equipment and the like, fluorine waste gas which is generated in production of a phosphatic fertilizer in a phosphate fertilizer plant and cannot be exhausted is taken as the raw material, and the resources are rich and low in cost, so that the environmental protection problem in production of the phosphatic fertilizer is solved, the waste gas is recycled, the technology gets a double advantage, and has very good social benefit and economic benefit.