Method for utilizing residual acid and slag in titanium dioxide production with sulfuric acid method
A technology of titanium dioxide and sulfuric acid method, applied in the direction of ferric sulfate, separation method, chemical instrument and method, etc., can solve the problems of large amount of hydrogen peroxide and high cost
Inactive Publication Date: 2011-02-16
李绍通
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Problems solved by technology
CN1052293 uses hydrogen peroxide as a catalytic oxidant to oxidize and synthesize polyferric sulfate. The amount of hydrogen peroxide is large and the cost is high
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The invention provides a method for utilizing residual acid and slag in titanium dioxide production with a sulfuric acid method. In the method, oxygen-enriched air is adopted as an oxidizing agent, residual acid and slag in the titanium dioxide production with the sulfuric acid method are used as raw materials, ferric nitrate synthesized by iron cement and nitric acid is used as a reaction auxiliary, polyferric sulfate is synthesized in an enamel reaction kettle filled with a packed tower, and tail gas in the reaction system is treated with ferrous sulphate solution. The method has the advantages of small energy consumption, low cost and convenient operation, effectively utilizes the residual acid and slag in the titanium dioxide production with the sulfuric acid method, and prevents the residual acid and slag from polluting the environment.
Description
technical field [0001] The invention relates to a utilization method of waste acid waste residue in sulfuric acid process titanium dioxide production. Background technique [0002] The production of titanium dioxide by sulfuric acid method is the main technical type of titanium dioxide production in China, and the waste acid liquid discharged from the production of titanium dioxide by sulfuric acid method has serious pollution to the environment. When titanium dioxide is produced by sulfuric acid method using ilmenite as raw material, about 8 tons of waste acid will be discharged for every ton of titanium dioxide produced, and about 4 tons of waste ferrous sulfate will be discharged. The content of sulfuric acid in these waste acids is about 18-24%, and the content of ferrous sulfate is about 15-25%, which not only causes serious environmental pollution, but also wastes a large amount of available resources in vain. At present, the treatment of waste acid in titanium dio...
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Inventor 李绍通
Owner 李绍通
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