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70results about "Zirconium sulfates" patented technology

Zirconia porous body and manufacturing method thereof

A zirconia porous body with excellent stability of heat resistance is manufactured. This relates to a zirconia porous body having peaks at pore diameters of 8 to 20 nm and 30 to 100 nm in a pore distribution based on the BJH method, with a total pore volume of 0.4 cc / g or more, and to a zirconia porous body having a peak at a pore diameters of 20 to 110 nm in a pore distribution based on the BJH method, with a total pore volume of 0.4 cc / g or more.
Owner:DAIICHI KIGENSO KAGAKU KOGYO CO LTD

Processes for treating red mud

There are provided processes for treating red mud. For example, the processes can comprise leaching red mud with HCl so as to obtain a leachate comprising ions of a first metal (for example aluminum) and a solid, and separating said solid from said leachate. Several other metals can be extracted from the leachate (Fe, Ni, Co, Mg, rare earth elements, rare metals, etc.). Various other components can be extracted from solid such as TiO2, SiO2 etc.
Owner:ORBITE ALUMINAE INC

Cerium oxide-zirconium oxide based composite rare-earth oxide with high specific surface area and high oxygen storage capacity and preparation method thereof

The invention discloses a method for preparing a cerium oxide-zirconium oxide based composite rare-earth oxide. The method comprises the following steps of: (1) heating a zirconium salt solution at room temperature, slowly adding sulfate ions, controlling the temperature rise rate so that the temperature is increased in the range of 90-95 DEG C when the sulfate ions are added completely, and then preserving heat for 20-100 minutes, thereby forming a zirconium basic sulfate composite salt precursor; (2) adding a cerium salt and a rare-earth metal salt to the precursor solution and stirring evenly, thereby obtaining a slurry; (3) settling the slurry by using basic carbonate and / or a basic oxalate solution, thereby obtaining a precipitate; and (4) filtering and washing the precipitate obtained in the step (3), removing purities, and calcining the washed precipitate. The cerium oxide-zirconium oxide based composite rare-earth oxide prepared by the method by controlling raw materials and process conditions has the characteristics of being high in total fine pore volume, high in fresh specific surface area, high in oxygen storage capacity and the like.
Owner:CHAOZHOU THREE CIRCLE GRP

Cerium oxide and zirconium oxide based composite rare earth oxide with favorable ageing resistance and high reduction activity and preparation method of cerium oxide and zirconium oxide based composite rare earth oxide

The invention discloses a preparation method of a cerium oxide and zirconium oxide based composite rare earth oxide. The method comprises the following steps of: (1) weighting zircon salt with a certain mass and preparing a zircon salt solution; (2) mixing urea and sulfuric acid or sulfate to prepare an activating agent solution; (3) heating the zircon salt solution under the room temperature, meanwhile, slowly and dropwise adding the activating agent solution, controlling the temperature rise speed to ensure that the temperature is raised to 60 DEG C after the addition of the activating agent solution is finished, continuing to raising the temperature to 90-95 DEG C, and keeping the temperature for 20-100min to form a basic zirconium sulfate composite salt precursor solution; (4) preparing soluble cerate and rare earth metal salt, adding the soluble cerate and the rare earth metal salt into the basic zirconium sulfate composite salt precursor solution, and settling by using a soluble hydroxide or an aqueous solution of ammonia; and (5) filtering and cleaning precipitates, and then, calcining the precipitates to obtain the cerium oxide and zirconium oxide based composite rare earth oxide. The cerium oxide and zirconium oxide based composite rare earth oxide prepared by using the method provided by the invention has favorable ageing resistance and high reduction activity.
Owner:CHAOZHOU THREE CIRCLE GRP

Process for the isolation and purification of zirconium peroxosulfate and uses thereof

Provided is a process for isolating zirconium peroxosulfate and its use, either as is or to prepare high purity zirconium compounds including powders of zirconium dioxide and stabilized zirconia. The process is based on precipitating a peroxide compound from an acidic peroxide solution of zirconium and provides a simple, economical method for producing the zirconium peroxosulfate powder and its derivatives with degree of zirconium recovery more than 99%. This process further provides an effective method for the separation and purification of zirconium from a variety of elements and / or naturally occurring ores.
Owner:BELOV VLADIMIR +1

Process for preparing a zirconium-based metal organic framework

There is provided a process for preparing a zirconium-based metal organic framework (Zr-MOF), the process comprising the steps (i) preparing a reaction mixture comprising zirconium ions, sulfate ions and at least one organic linker compound in an aqueous solvent; and (ii) heating the reaction mixture from step (i).
Owner:KATHOLIEKE UNIV LEUVEN +2

Preparation method of inorganic fullerene molybdenum disulfide and its application

An inorganic fullerene MoS2 nanoparticle with enclosed nested luminar structure used as the additive of lubricating oil is prepared through proportionally dissolving sodium sulfide and ammonium molybdate in water, reaction while adding the aqueous solution of polyethanediol, dripping hydrochloric acid to obtain MoS3 deposit, centrifugal separation, vacuum drying, hydrodesulfurizing at 500-1000 deg.C in quartz-pipe furnace under protection of Ar gas, and holding the temp for 5-10 hr.
Owner:ZHEJIANG UNIV

Treatment of a wide range of titanium compounds

A process of producing 99% plus titanium dioxide product by using conventional and microwave heating and leaching of the titanium compound feedstock using acid and oxidants. The solid residue from the leaching is used to produce the high quality titanium oxide by froth flotation. Hydrochloric acid can be recovered by multi-stage evaporation. The process can be modified to produce nano-size titanium dioxide product.
Owner:RODOLFO ANTONIO M GOMEZ

Beneficiation of titaniferous ore with sulfuric acid

Processes for the efficient and economical beneficiation of titaniferous ore are provided. A unique process for beneficiating ore comprising pretreatment of the ore by oxidation and reduction, followed by acid leaching with sulfuric acid has been developed. The acid used in this process may be recycled, which will thereby increase the efficiency of the process. Preferably the ore treated according to the present invention is ilmenite ore.
Owner:TRONOX LLC

Benefication of titania slag by oxidation and reduction treatment

This invention relates to a method of treating titania slag to increase the leachability of impurities from the slag consisting of the steps of sizing the titania slag to a particle size from 75 to 850 mum; oxidizing the sized slag particles at a temperature from about 700° C. to below about 900° C. causing the iron present in the slag to concentrate at the exposed surfaces of the slag particles and / or causing an anatase phase to stabilize in the slag, causing a major portion of the iron in the Fe(II) state to convert to the Fe(III) state, and causing the titanium in the Ti(III) state to be converted to the Ti(IV) state; and reducing the oxidized slag in a reducing atmosphere from about 700° C. to about 950° C. to convert a major portion of the iron in the Fe(III) state to the Fe(II) state. The invention also relates to a method of beneficiating titania slag to increase the TiO2 content thereof wherein the above treated slag is leached with acid.
Owner:EXXARO TSA SANDS

Processes for preparing titanium oxide and various other products

There are provided processes for preparing various products from various materials. For example, such processes are effective for extracting titanium and various other metals from various materials, thereby allowing for preparing products such as titanium chloride and titanium oxide. These processes can comprise leaching the starting material with HCl so as to obtain a leachate and a solid. The solid can be treated so as to substantially selectively extract titanium therefrom while the leachate can be treated so as to substantially selectively recover a first metal chloride therefrom.
Owner:ORBITE ALUMINAE INC

Production process of basic zirconium sulphate

The invention provides a direct production process of basic zirconium sulphate from the strong acid salt of zirconium, sulphates, alkali of base or alkaline-earth metal (including ammonium), which comprises, mixing zirconium strong acid salt solid material or sulphate, alkali of base or alkaline-earth metal (including ammonium) by a finite proportion directly, stirring, grinding to result in complete reaction, washing and dewatering to produce the alkali zirconium sulfate.
Owner:柳云珍

Method of separating and purifying zircon fron basic rock

A process for separating zircon from basic rock and purifying it includes such steps as crushing and pulverizing basic rock, magnetic stirring while removing strong magnetic substance by U-shaped magnet, using three magnetic rods to respectively remove weak magnetic, strong electromagnetic and weak electromagnetic minerals, using miniature shaker to remove the most of light mineral, electromagnetically fine separation by multi-purpose magnetic analyzer, using heavy diiodomethane solution for separation in separating funnel to remove light minerals and examine by binocular microscope. Its advantages are high purity (more than 99%) and short period.
Owner:GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI

Adsorbents for Radioisotopes, Preparation Method Thereof, and Radioisotope Generators Using the Same

Disclosed is a novel adsorbent for use in a 99Mo / 99mTc generator, which is a medical diagnostic radioisotope generator, and in a 188W / 188Re generator, which is a therapeutic radioisotope generator. The adsorbent composed of sulfated alumina or alumina-sulfated zirconia exhibits adsorption capacity superior to that of conventional adsorbents, and is stable and is thus loaded in a dry state in an adsorption column so that the radioisotope 99Mo or 188W can be adsorbed. Thus, it is possible to miniaturize the column, and such a miniaturized column is small, convenient to use, and highly efficient, and extracts a radioisotope satisfying the requirements for pharmaceuticals, and thus can be useful for radioisotope generators extracting 99mTc or 188Re.
Owner:KOREA ATOMIC ENERGY RES INST

Titaniferous ore beneficiation

This invention relates to a process for beneficiating a titaniferous ore. The process comprises calcining the titaniferous ore, at least one alkali or alkaline earth metal salt, and at least one alumina-containing material in the presence of oxygen to form a calcined ore mixture, then leaching the calcined ore mixture with a solution comprising ammonium, sodium or magnesium chloride in the presence of oxygen to form a leached ore mixture, and contacting the leached ore with an acid to form a beneficiated ore.
Owner:UNIV OF LEEDS

Titaniferous ore beneficiation

This invention relates to a process for beneficiating a titaniferous ore. The process comprises leaching the titaniferous ore with sulfuric acid to form a leached ore, calcining the leached ore in the presence of oxygen to form a calcined ore, and leaching the calcined ore with sulfuric acid, hydrochloric acid, and / or nitric acid to form a beneficiated ore. The leached ore is not reduced prior to or following calcination.
Owner:TRONOX LLC

Cerium oxide and zirconium oxide based composite rare earth oxide with favorable ageing resistance and high reduction activity and preparation method of cerium oxide and zirconium oxide based composite rare earth oxide

Provided is a method for preparing cerium oxide and zirconium oxide based composite rare earth oxide. The method comprises: (1) preparing a zircon salt solution; (2) prepare an activating agent solution by mixing urea and sulfuric acid or sulfate; (3) heating the zircon salt solution at a room temperature, dropwise adding the activating agent solution slowly, controlling the temperature rise speed to make the temperature raised to 60 degrees centigrade after the addition of the activating agent solution is finished, continuing to raising the temperature to 90 to 95 degrees centigrade, and keeping the temperature for 20-100min to form a basic zirconium sulfate composite salt precursor solution; (4) preparing soluble cerate and rare earth metal salt, adding the soluble cerate and the rare earth metal salt into the basic zirconium sulfate composite salt precursor solution, and performing precipitation by using a soluble hydroxide or ammonia solution; and (5) filtering and cleaning precipitates, and then, calcining the precipitates. Also provided is a cerium oxide and zirconium oxide based composite rare earth oxide prepared by using the method.
Owner:CHAOZHOU THREE CIRCLE GRP

Production of high-grade synthetic rutile from low-grade titanium-bearing ores

The present invention relates to a two-stage leaching process using concentrated hydrochloric acid that upgrades a variety of inferior quality titanium-iron ores into premium titanium concentrate and iron oxide products. The ground ore is leached with two separate quantities of hydrochloric acid after which the dissolved titanium is precipitated from the filtered liquor by hydrolysis. The still soluble iron chlorides are then optionally subjected to oxyhydrolysis to recover iron oxide and HCl. The process was developed for low-grade ores (under 12% TiO2), and can be naturally applied advantageously to higher grade titanium-bearing ores.
Owner:FFK TECH INC

Process for recovering titanium dioxide

An improved process for recovering a titanium dioxide product from a titanium oxide-containing roasted mass of the type derived from roasting an ilmenite, anatase or perovskite ore by exploiting an organic acid, such as mixture of oxalic acid and ascorbic acid.
Owner:UNIV OF LEEDS

Method for preparing zirconium sulfate tetrahydrate with zirconium carbonate production wastewater

The invention discloses a method for preparing zirconium sulfate tetrahydrate with zirconium carbonate production wastewater. The method comprises the technical steps of: (1) adjusting a pH (Potential of Hydrogen) value of the zirconium carbonate production wastewater with dilute alkali, performing sedimentation, (2) pumping the wastewater into a plate-and-frame filter press for press filtration, purging with compressed air after the press filtration, removing a plate, obtaining zirconium hydroxide, (3) dissolving zirconium hydroxide in sulfuric acid or zirconium sulfate tetrahydrate mother liquor at a mass-volume ratio of 1:(1-3), heating to 50-60 DEG C to completely dissolve zirconium acyl hydroxide, filtering off mechanical impurities, and (4) adding concentrated sulfuric acid into filtrate to adjust a system sulfuric acid concentration to 50-70%, naturally cooling to 40 DEG C for crystallization, centrifuging, and obtaining zirconium sulfate tetrahydrate. The method is simple in technology, prepares zirconium sulfate tetrahydrate with the zirconium carbonate production wastewater, and prevents the zirconium carbonate production wastewater from influencing an environment; obtained zirconium sulfate tetrahydrate is high in purity and is up to a national first grade standard; since the zirconium sulfate tetrahydrate mother liquor is recycled, the production cost is lowered effectively; and environmental resources are saved.
Owner:JIANGXI KINGAN HI TECH

Process for Improving the Grade and Optical Quality of Zircons

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.
Owner:ILUKA RESOURCES
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