Method for producing anhydrous hydrogen fluoride and coproducing silica white from low-grade fluorine resources
An anhydrous hydrogen fluoride, low-grade technology, applied in fluorine/hydrogen fluoride, silicon oxide, silicon dioxide, etc., can solve the problems of low main content of hydrogen fluoride, uneconomical industrialization, incomplete conversion, etc., and achieve high utilization rate of raw materials and high price Inexpensive, cost-reducing effect
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Embodiment 1
[0021] In this embodiment, the method for producing anhydrous hydrogen fluoride and co-producing white carbon black by utilizing low-grade fluorine resources comprises the following steps:
[0022] (1) Ammonium fluoride solution and silicon dioxide were obtained by ammonium lysis of 4000g of fluorosilicic acid solution with a concentration of 5% by weight of phosphate fertilizer by-products, and separated by filtration. The resulting filter cake was silicon dioxide ointment, which was washed and dried Promptly get 85g white carbon black product after the end, gained filtrate is ammonium fluoride solution;
[0023] (2) The ammonium fluoride solution obtained in step (1) is concentrated and pyrolyzed to obtain 710 g of ammonium bifluoride solution with a concentration of 20% by weight and ammonia gas, which is used in step (1) phosphate fertilizer by-product fluosilicic acid solution Ammonolysis;
[0024] (3) 710g of the obtained 710g by weight concentration of the ammonium bif...
Embodiment 2
[0027] In this embodiment, the method for producing anhydrous hydrogen fluoride and co-producing white carbon black by utilizing low-grade fluorine resources comprises the following steps:
[0028] (1) Ammonium fluoride solution and silicon dioxide were obtained by ammonium lysis of 167g of fluosilicic acid solution with a concentration of 60% by weight of phosphate fertilizer by-products, which were separated by filtration, and the obtained filter cake was silicon dioxide ointment, which was washed and dried Promptly get 45g white carbon black product after the end, gained filtrate is ammonium fluoride solution;
[0029] (2) The ammonium fluoride solution obtained in step (1) is concentrated and pyrolyzed to obtain 355 g of ammonium bifluoride solution with a concentration of 40% by weight and ammonia gas, which is used in step (1) phosphate fertilizer by-product fluosilicic acid solution Ammonolysis;
[0030] (3) 355g of the obtained 355g weight percent concentration of the...
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