Process for the production of su00eclica, sodium sulphite and sodium sulphite hydrogenated with sodium sulfate.The present invention relates to a process for the production of silica, sodium sulphite and sodium sulphite hydrogenated with sodium sulfate, quartz sand, sodium sulfate and carbon are mixed and loaded in a furnace for reaction and sodium silicate solid and diu00e1xido and Nxofre are used to prepare silicaSodium sulphite and sodium sulphite hydrogenated according to the stages that follow: 1) to produce silica, sodium silicate solid is dissolved in water and filtered to produce a solution of soluble glass; sulfuric acid is reacted with the solution of soluble glass to prod. Uzir precipitated silica and sodium sulfate; and the precipitated silica is washed, filtered,Liqu00faefeita and dried to produce silica; 2) to produce sodium sulphite: caustic soda is added to a solution of hydrogenated sodium sulphite to produce sodium sulphite solution; a part of the sodium sulphite solution is concentrated and evaporated to obtain dry sodium sulphite; The other part of the solution of sodium sulphite is interacted with the sulfur dioxide produced during the production of youLicato sodium sulphite solution to produce hydrogenated sodium.Which can be recycled and reused in the step 2); 3) to produce hydrogenated sodium sulphite: soda is added in a solution of sodium sulfite, hydrogenated, followed by reaction with diu00f3xi of sulfur produced during the production of sodium silicate to produce a solution. Hydrogenated sodium sulfide supersaturated, which is crystallized and dried to obtain hydrogenated sodium sulphite.Solid, dry. The process of the present invention produces various products with low production costs and without causing environmental problems, and thus has a great practical value.
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