Method for preparing precipitated barium sulfate by utilizing titanium white waste acid

Abstract

The invention discloses a method for preparing precipitated barium sulfate by utilizing titanium white waste acid, belonging to the technical field of comprehensive utilization of titanium white wasteacid and preparation of barium sulfate. The method comprises the following steps of adding ammonium hydroxide to neutralize with titanium white waste acid firstly, then generating ammonium sulfate, and controlling a systemic pH to separate out photodegredation sediment; then adding the ammonium hydroxide continuously, and controlling the pH to separate out ferrous hydroxide sediment; then addinghydrogen peroxide in proportion, oxidating residual Fe2<+> into Fe3<+>, and adjusting the pH to separate out ferric hydroxide sediment; condensing an ammonium sulfate solution, then replacing a mirabilite solution in a traditional precipitated barium sulfate production process, enabling the ammonium sulfate solution to generate replacement reaction with a barium sulfide solution, and washing, drying and smashing to prepare a precipitated barium sulfate product. According to the method, after neutralizing the titanium white waste acid with the ammonium hydroxide and performing purification andimpurity removal, a traditional sodium sulfate solution is replaced for producing the precipitated barium sulfate, meanwhile, recycled photodegredation sediment can be further used for titanium dioxide production, not only are resources saved, but also waste can be recycled, and the waste acid treatment costs of titanium dioxide plants and environment protection pressure are reduced.

Description

technical field [0001] The invention relates to the technical field of barium sulfate preparation, more specifically, relates to a method for preparing precipitated barium sulfate by utilizing titanium white waste acid. Background technique [0002] Barium sulfate is an important basic chemical raw material, widely used in coatings, inks, rubber, plastics, fillers for insulating tapes, surface coating agents for impression paper and coated paper, sizing agents for textiles, and weighting agents for deep well drilling . It is also used in various industries such as pigments, ceramics, storage batteries, enamel, mineral processing, adhesives, medicine, glass and spices, and is also a raw material for the production of other barium salts. [0003] The production process of barium sulfate in my country is mainly the black ash-glauber's salt method: barite and coal are mixed in a certain proportion, crushed and sent to the rotary kiln, and reduced and roasted at high temperature...

AI Technical Summary

Problems solved by technology

The method utilizes white carbon black waste liquid to produce precipitated barium sulfate, and the white carbon black waste liquid impurity composition is different from titanium white waste acid, does not contain ferrous sulfate, does not involve the method for removing ferrous sulfate, and the impurity removal process of this method is loaded down with trivial details, There are many steps, it also involves precise filtration, the processing time is long, and the concentration of sodium sulfate obtained is low, about 8%, and it needs to be concentrated before it can be used to precipitate barium sulfate, so the impurity removal process of white carbon black waste liquid in this method is not applicable Purification of spent titanium dioxide acid

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