Process method for producing fluorine compounds and silicon compounds by cleanly utilizing fluosilicic acid

Abstract

The invention discloses a process method for producing fluorine compounds and silicon compounds by cleanly utilizing fluosilicic acid. The process method comprises the following steps of: preparing fluosilicic acid as a phosphorus chemical by-product into an anhydrous aluminum fluoride product, a sodium fluoride product and a cryolite product, and combining with other industrial waste silicon slags and aluminum slags to prepare a 4A zeolite product. The process method comprehensively utilizes the fluosilicic acid and has high resource recovery rate, wherein the recovery rate of the fluorine element reaches higher than 90 percent. Waste silicon dioxide slags generated in the process can be recycled to produce white carbon black and the 4A zeolite, and a mother liquor, a cleaning solution and waste gas which are generated in the production process are all recycled, thereby the environmental pollution is reduced, and the purposes of zero emission and no pollution are truly achieved, thus the method completely meets the requirement for clean production. The invention has the advantages of advanced production process, good product quality and high value, wherein the fluorine content of the aluminum fluoride is high and between 63-65 percent; the quality index of the obtained white carbon black meets the requirement on the standard of the chemical industry; and the quality of the 4A zeolite product meets the requirements on the national standard and the standard of European and American developed countries.

Description

technical field [0001] The invention relates to a process method for producing fluorine compounds and silicon compounds through the clean utilization of fluosilicic acid. Background technique [0002] In recent years, with the further expansion of the scale of my country's phosphorus chemical industry, the country has paid more and more attention to the comprehensive utilization of phosphorus chemical by-products, and particularly emphasized the need to make full use of scientific and technological means to further adjust the industrial structure and product structure through technological innovation. By the end of 2008, my country has built a phosphate fertilizer production capacity of about 30 million t / aP 2 o 5 , It is estimated that by 2010, my country's high-concentration phosphate compound fertilizer production capacity will increase significantly. Due to the vigorous development of the phosphorus chemical industry and the rapid expansion of production capacity, it w...

AI Technical Summary

Problems solved by technology

Among them, the process of the indirect method is relatively cumbersome; although the process of the direct method is relatively simple, it does not recycle the waste liquid and waste residue generated during the production process, or the amount of money spent on post-processing

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