5 results about "Chloride process" patented technology

This invention discloses a method for recovering gallium-vanadium enriched material from gallium-vanadium-containing solid waste. The method includes: mixing the gallium-vanadium-containing solid waste with waste acid, stirring and leaching under heating conditions to obtain a slurry; wherein the waste acid is selected from waste hydrochloric acid, a byproduct of titanium dioxide extraction tail gas treatment during the chloride process, or waste sulfuric acid formed after drying chlorine gas with concentrated sulfuric acid during the chloride process; adding a neutralizing agent to the slurry to adjust the pH value to 0.3±0.1, filtering to obtain a first filtrate; adding a reducing agent to the first filtrate to reduce the trivalent iron and pentavalent vanadium in the solution, filtering to obtain a second filtrate; adjusting the pH value of the second filtrate to 3.8-4.5 with an alkaline precipitant to carry out a precipitation reaction, and obtaining gallium-vanadium enriched material after solid-liquid separation. This invention achieves simultaneous enrichment of gallium and vanadium, simplifying the process flow, reducing operational difficulty and production costs, while obtaining high-grade gallium-vanadium enriched material.

This invention relates to the field of pigment preparation, specifically to a method for preparing highly conductive titanium dioxide using the chloride process. The method includes: reacting oxygen and titanium tetrachloride with an oxidation reaction to generate titanium dioxide particles, which are then introduced into a cooling conduit. A preheated coating agent is added for a coating reaction and slurry preparation. The slurry temperature is adjusted to 60-75°C and the pH to 2-3, and a phosphate-containing compound is added. The slurry temperature is adjusted to 80-90°C, and a sodium aluminate solution and an alkaline solution are added to adjust the pH of the slurry to 9.5-10.5, followed by a first homogenization treatment. A tin chloride solution and a sodium aluminate solution are added, and the pH of the slurry is adjusted to 7.5-8.5, followed by a second homogenization treatment. The pH of the slurry is adjusted to 4.5-5.5, followed by a third homogenization treatment. The pH of the slurry is adjusted to 5.5-6.5, followed by a fourth homogenization treatment. This method is low-cost, simple, and suitable for large-scale production, producing conductive titanium dioxide with excellent performance.

Integrated processes and systems for the co-production of titanium dioxide and caustic soda. A chlor-alkali process is integrated with a chloride process of titanium dioxide production to produce both caustic soda and titanium dioxide. A chlor-alkali unit produces caustic soda, chlorine, and hydrogen. The chlorine produced in the chlor-alkali unit then serves as an input for a titanium dioxide production unit. Some or all of the hydrogen is combusted to generate the heat required for the titanium dioxide production unit, and / or used in other processes, such as a reducing agent in the production of direct reduced iron (DRI).

This invention belongs to the technical field of metal ion adsorption materials, specifically a method for preparing an adsorbent and a method for determining the soluble zinc content of raw materials used in the ammonia chloride process for producing electrolytic zinc. This invention modifies the surface of manganese dioxide with a thiourea-based silane coupling agent, grafting a silane coupling agent containing a thiourea structure onto the surface of manganese dioxide. The adsorption of lead, copper, and cadmium ions in solution is achieved using the manganese dioxide matrix and the thiourea-based silane coupling agent on the matrix surface, while effectively preventing the adsorbent from adsorbing zinc ions from the solution. When the adsorbent prepared by this invention is used to determine the soluble zinc content of raw materials used in the ammonia chloride process for producing electrolytic zinc, it exhibits a small testing error and can effectively improve the accuracy of soluble zinc content determination.

The application relates to the technical field of titanium white production, and discloses a method for improving the coating rate of titanium white produced by the chlorination method, which comprises the following steps: preparing slurry by mixing titanium white produced by the chlorination method, a dispersing agent and deionized water, and performing dispersion treatment on the slurry, wherein the pH value of the slurry is controlled to be 2.0-5.0; adjusting the slurry after the dispersion treatment to a predetermined concentration and a predetermined temperature; performing inorganic coating treatment on the slurry after the adjustment under different pH conditions, wherein the inorganic coating treatment comprises acidic parallel-flow coating of a silicon-aluminum composite film, forward-flow coating of a silicon film, alkaline parallel-flow coating of a silicon-aluminum composite film, forward-flow coating of an aluminum film and neutral parallel-flow coating of a silicon-aluminum composite film; and performing organic treatment on the material after the multiple inorganic coating treatments to obtain titanium white products. The slurry of the titanium white produced by the chlorination method is directly dispersed under acidic conditions and inorganic coating treatment is performed under different pH conditions, so that the coating rate of the titanium white can be improved, and the pigment performance and application performance of the titanium white products can be improved.