39results about "Titanium and titanyl sulfates" patented technology

A sulfate process for producing titania from a titaniferous material (as herein defined) including a step of leaching said titaniferous material with a leachant to form a process solution that includes an acidic solution of titanyl sulfate and iron sulfate, wherein said sulfate process further includes a filtration step comprising filtering said leachant to at least substantially remove titanyl sulfate particles from said leachant prior to supplying said leachant to said leach step.

A preparation method of polymeric titanium sulfate (PTS) inorganic polymeric flocculant. The PTS inorganic polymeric flocculant is prepared by taking a titanium sulfate solution and a sodium hydroxide solution as raw materials and dropping the sodium hydroxide solution into the titanium sulfate solution; a preset alkalization degree is 0.1-5.0; after the dropping is finished, the titanium sulfate solution and the sodium hydroxide solution are stirred for 1.5-5h; The flocculant prepared in the method has the advantages of good product stability, strong adsorption bridging ability for colloidal substances, good flocculation effect, wide application range, small generated sludge quantity and the like, can be widely applied to the fields of water supply, waste water treatment, papermaking, textile printing and dyeing, daily-use chemical industry and the like, and has a good water treatment effect. The preparation method is simple, economical and rapid.

A process for improving the grade and optical quality of zircon, comprising: baking a mixture of a zircon feed and concentrated sulphuric acid at a baking temperature in the range of from 200 up to 400° C., and for a time to form water leachable sulphates with impurities therein including at least iron and titanium; leaching the baked mixture to dissolve the leachable sulphates; and separating the zircon from the leachate containing the leached sulphates, which separated zircon is thereby of improved grade and optical quality.

The invention relates to a production process of titanium dioxide and particularly relates to a preparation method of a trivalent titanium solution. The preparation method of the trivalent titanium solution comprises the following steps: A, mixing primarily-washed metatitanic acid slurry (measured according to TiO2) and concentrated sulfuric acid (measured according to H2SO4) in a pressure container according to a mass ratio of 1 to (1.8-5); B, measuring the concentration of a sulfuric acid solution; C, pressurizing the inside of the pressure container according to the measured concentration and enabling the boiling point of the sulfuric acid solution in the pressure container to be not lower than 140 DEG C; D, heating and keeping boiling for at least 30 minutes; and E, stopping heating, releasing pressure, cooling, adding water for adjusting the concentration, adding aluminum powder and reducing tetravalent titanium in the solution to trivalent titanium to obtain the trivalent titanium solution. The preparation method of the trivalent titanium solution has the advantages that the problems of stacking of titanium gypsum and pollution are solved, and the production cost of the trivalent titanium solution can be obviously reduced.

The invention discloses a new process for preparing fully water-soluble titanyl sulfate powder. The metatitanic acid powder and sulfuric acid are mixed and granulated, and the crude product of titanyl sulfate is obtained through low-temperature calcination, and then leached and dissolved by dilute sulfuric acid, and the solution is filtered. Then the titanyl sulfate solution is vacuum concentrated, heated and dried to obtain high-quality fully water-soluble titanyl sulfate powder. This method adopts a new calcination process in the preparation of crude titanyl sulfate, and replaces the reaction kettle in the acid-dissolving section with a calciner, which reduces the residue of sulfuric acid in the system, so a new crystallization process can be adopted without adding additional titanyl sulfate seeds , filtration operations and the use of organic solvent flushing agents such as ethanol simplify the production process of titanyl sulfate.

The invention discloses a purification method of a decorative base paper titanium dioxide production material, and belongs to the technical field of sulfuric acid method titanium dioxide production. The method is performed in a crystallizing tank with a stirrer, and comprises the following steps: A, feeding titanium sulfate solution into the crystallizing tank, and starting the stirrer; B, controlling pressure in the crystallizing tank to cool down a material; C, leading auxiliary steam into the crystallizing tank, meanwhile leading auxiliary circulation water into the crystallizing tank, andcontrolling tank feeding temperature and tank discharging temperature of the auxiliary circulation water, pressure in the tank and material temperature in the tank; D, leading main steam into the crystallizing tank, meanwhile leading main circulation water into the crystallizing tank, and controlling tank feeding temperature and tank discharging temperature of the main circulation water, pressurein the tank and material temperature in the tank; E, stopping the leading of auxiliary steam, main steam, auxiliary circulation water and main circulation water, emptying till pressure in the tank isequal to environment pressure, and filtering. The method realizes purification of the titanium sulfate solution, and improves the crystallization efficiency of ferrous sulfate in the titanium sulfatesolution.

The invention provides a preparation method of a raw material for producing titanium dioxide of decorative base paper, and belongs to the technical field of titanium dioxide of decorative base paper. The method comprises the following steps: A, selecting titanium ore of which the residue on sieve is 10.0-20.0% under 325 meshes and the residue on sieve is 0 under 200 meshes, the water content is not greater than 0.5%, TiO2 is not less than 45%, Fe2O3 is not greater than 8%, and the temperature is not greater than 40 DEG C; selecting sulfuric acid on the concentration of 30-55% and under the temperature of being not greater than 40 DEG C; mixing sulfuric acid and titanium ore; cooling to obtain a titanium ore pre-mixed material; B, feeding the titanium ore pre-mixed material into a reaction tank; stirring; adding sulfuric acid on the concentration of 98%; reacting; then curing; C, cooling the cured material; adding dilute sulphuric acid; then adding sand filtering water to dissolve; D, adding zero-valent iron powder to the dissolved liquid to react; E, precipitating the liquid obtained in the reaction in step D; collecting supernate; filtering to obtain titanous sulfate containing not greater than 30mg / L of filtrate solid content. The method is stable to operate, high in acidolysis rate, stable in quality index, and stable in quality of titanium dioxide prepared by the sulfuric acid method.

The invention provides a method for the Industrial purification of a titanium feed stream of purity P1, by the formation of a titanium-double-salt precipitate of purity P2 and a titanium solution with purity P3, wherein P2>P1>P3, the method comprising the steps of: i. forming, from the feed, a medium comprising water, titanium ion, a cation selected from the group consisting of ammonium, cations of alkali metals, protons and a combination thereof, and an anion selected from the group consisting of OH, SO4, HSO4, halides and a combination thereof, which formed medium is further characterized by the presence of (a) a double-salt precipitate comprising titanium ion, at least one of the cations and at least one of the anions; and (b) a titanium solution; and wherein the concentration of the anion in the titanium solution is higher than 15% and the ratio between the concentrations of the cation and the anion in the titanium solution is higher than 0.2 and lower than 1.6; and ii. separating at least a portion of the precipitate from the solution.

The present application relates to the field of titanium dioxide production, and discloses a titanium dioxide concentration system and process, wherein a titanium dioxide concentration system includes an evaporation module, a condensation module and a heat recovery module for concentrating thin titanium liquid; the evaporation module includes a thin Titanium tank, heat exchanger, evaporation chamber, concentrated titanium tank, cyclone separator, primary steam condenser, secondary steam condenser and vacuum pump; the thin titanium tank is connected with the heat exchanger, and the heat exchanger is connected with the evaporation chamber; The heat exchanger is connected to the steam, the heat exchanger is connected to the evaporation chamber; the evaporation chamber is connected to the concentrated titanium tank, and the evaporation chamber is connected to the cyclone separator; the cyclone separator is connected to the concentrated titanium tank, and the cyclone separator is connected to the primary steam condenser. The primary steam condenser is connected with the vacuum pump; the secondary steam condenser is connected with the primary steam condenser, and the secondary steam condenser is connected with the vacuum pump. The present application has the effect of alleviating the problem of corrosion of concentration system equipment by acid semi-dehydration.

The invention discloses a new sulfate process titanium dioxide acidolysis method. Sulfuric acid with mass fraction being 98% is utilized to be subjected to a reaction with titanium ore powder, and themain reaction is performed safely by controlling flow of compressed air and frequency of an exhaust draught fan; the method has technical effects as follows: raw material cost is saved, the risk of overflowing in the main reaction is reduced, and the acidolysis rate of ore is increased.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for converting titanium dioxide red gypsum into white gypsum and enriching titanium and iron.The method comprises the following steps: preparing white gypsum, preparing the red gypsum, converting the red gypsum into acid white gypsum, and converting the acid white gypsum into the white gypsum; through control of a process and an end point of the reaction, the produced white gypsum can be directly used for a cement factory, and can be deeply processed into building material gypsum with higher added value; through dissolution of the red gypsum by a waste concentrated acid, the red gypsum is converted into the acid white gypsum, and a TiOSO4 and FeSO4 acidic solution with a high concentration is obtained, wherein the recovery utilization rate is 95% or more; and the acid white gypsum is diluted by using titanium dioxide wastewater, and after primary neutralization is performed, thewhite gypsum is obtained. The method provided by the invention has a simple technological process, a stable treatment effect, less equipment investment, no secondary pollution, low treatment costs, considerable economic benefits and broad market prospects.