162results about "Zirconium halides" patented technology

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.

The invention relates to the field of chemical production, and discloses a method for cooling zirconium tetrachloride produced through a fluidizing chlorination method. The cooling method comprises the following steps: fully mixing zircon sand/zirconium dioxide/a mixture of zircon sand and zirconium dioxide with petroleum coke powder according to a certain ratio, adding the mixture into a fluidizing chlorination furnace, introducing chlorine gas into the furnace to carry out chlorination reactions; introducing the gas generated in the chlorination reactions into a reaction gas cooling channel from the outlet of the fluidizing chlorination furnace, spraying liquid coolant into the reaction gas cooling channel to cool the reaction gas; then introducing the cooled reaction gas into a zirconium tetrachloride collecting tank, at the same time, and spraying liquid coolant into the zirconium tetrachloride collecting tank from top part or lateral side of the zirconium tetrachloride collecting tank so as to cool the reaction gas, wherein zirconium tetrachloride in a gas state is cooled and converted into zirconium tetrachloride powder, and the powder falls on the bottom of the zirconium tetrachloride collecting tank. According to the cooling method, liquid coolant is sprayed to the reaction gas so as to cool the reaction gas, the cooling effect is improved, the yield of zirconium tetrachloride is increased, and the production cost is reduced.

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.

A process for preparing ZrCl4 includes such steps as proportionally mixing fine desiliconized zirconium oxide powder with petroleum coke powder, dewatering, loading the mixture into boiling furnace at 900 +/- 5 deg.C while filling chlorine gas, chlorinating reaction at 900-1100 +/- 5 deg.C for 20-21 hr, cooling to 200 +/- 10 deg.C for 8-10 hr, and cooling to 20 +/- 5 deg.C for 3-5 hr.

The invention relates to a process method for producing zirconium tetrachloride through a fluidizing chlorination method. The process method comprises the following steps: smashing zircon sand to 300-325 meshes, smashing petroleum coke to 100-200 meshes, smashing chemical heat supplementing agent to 200-400 meshes, firstly fully mixing the zircon sand and the petroleum coke powder, simultaneously adding the mixture and the heat supplementing agent into a fluidizing chlorination furnace, introducing chlorine to carry out chlorination reaction and keeping the temperature of the fluidizing chlorination furnace at 1100 DEG C, wherein the chemical heat supplementing agent is silica powder or silicon carbide or a mixture of the silica powder and the silicon carbide; the reaction formula of the chemical heat supplementing agent is SiC+2Cl2=SiCl4+C or Si+2Cl2=SiCl4; the main reaction formula of producing the zirconium tetrachloride through zircon sand chlorination is ZrSiO4+4C+4Cl2=ZrCl4+SiCl4+4CO. According to the method disclosed by the invention, the heating problem of a zircon sand fluidizing chlorination furnace can be solved, the production cost of the zirconium tetrachloride is reduced and a byproduct: an important chemical raw material silicon tetrachloride can be produced, so that the process method has the advantages of increasing the working efficiency, saving the energy and reducing the production cost.

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.

The invention relates generally to processes for the production of high-basicity and ultr-high basicity polyaluminum chlorides including aluminum chlorohydrate. The processes can produce products of a wide range of basicities and are particularly useful in producing high basicity products. The process can produce a wide range of solution concentrations and are particularly useful in producing high solution concentrations. The processes described generate high purity products, which are free of by-product salt(s). The processes described herein can also be utilized to produce enhanced efficacy polyaluminum chlorides including aluminum chlorohydrate. When compared to conventional processes for manufacturing these compounds the processes disclosed herein are unique in so far as the disclosed processes do not require aluminum metal as a starting material. The products of the processes are suitable in applications including water purification, catalysts, and antiperspirants. In addition, the invention is directed to the products prepared by the processes described herein.

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.

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.

The invention relates to a production device for preparing ultra-pure zirconium oxychloride byproduct silicon tetrachloride by fluidizing chlorination of zircon sand, belonging to a preparation method of zirconium halogenide. The production device comprises a zircon sand fluidizing chlorination system, a silicon tetrachloride condensation collection system, a silicon tetrachloride rectifying system and a silicon tetrachloride hydrolyzed ultra-pure zirconium oxychloride preparation system. The production device is characterized by also comprising a tail gas recycling system; the tail gas recycling system comprises a tail gas storage device, a chlorine gas separation recycling device and a CO recycling storage device; firstly, the chlorine gas in the tail gas is separated and collected to be used as a raw material for fluidizing chlorination of the zircon sand and to be recycled; and the tail gas after the chlorine gas is separated is used as a raw material of an industrial production device involved in the synthesis reaction participated by CO. By adopting the production device, the Cl2 and CO resources can be efficiently utilized, and the emission of the greenhouse gas CO2 is reduced; and the production cost of products of the zircon sand fluidizing chlorination device can be reduced, and the production capacity of the device can be improved.

The invention provides a method for producing zirconium tetrachloride by carbochlorination and a method for producing zirconium sponge. The method for producing zirconium tetrachloride comprises the following steps: mixing 100 parts by weight of zircon sand with 26-45 parts by weight of carbonaceous reducing agent, and adding into a chlorination furnace; preheating a mixture to 1200-1500 DEG C; introducing chlorine at the temperature of 500-1100 DEG C, performing carbon-adding boiling chlorination reaction with the mixture, heating, and controlling the chlorination reaction temperature at 1050-1200 DEG C to obtain a reaction product. The method for producing zirconium sponge comprises the following steps: preparing the reaction product taking zirconium tetrachloride as a main component by using the method for producing zirconium tetrachloride; performing reduction treatment on the reaction product to obtain zirconium sponge. The methods provided by the invention have the beneficial effects of short process flow, low power consumption, low cost and continuous and stable reaction.

The invention relates to the technical field of chemical processes and in particular discloses a method for producing zirconium tetrachloride. The method comprises the following steps: respectively crushing zircon sand, petroleum coke powder and a chemical auxiliary agent; fully mixing the zircon sand and petroleum coke powder according to a ratio, adding the mixture into a boiling chloridizing furnace, and introducing chlorine for carrying out a chlorination reaction; regulating the amount of the added chemical auxiliary agent by virtue of an automatic control system, so that the temperature of the boiling chloridizing furnace is always preserved to 1100 DEG C. The chemical auxiliary agent accounts for 15-30 percent of the total weight of the zircon sand and petroleum coke powder; the weight ratio of the zircon sand to petroleum coke powder is 10:(1-2.5); and the chemical auxiliary agent refers to metal silicon, silicon carbide or a mixture of metal silicon and silicon carbide. According to the method disclosed by the invention, the reaction temperature can be constantly controlled, the complicated operation of frequently stopping and replacing is avoided, the production efficiency is improved, and the production cost is reduced.

The invention relates to nuclear-grade sponge zirconium, in particular to a method for preparing nuclear-grade sponge zirconium and nuclear-grade sponge hafnium. Chlorine generated by hydrochloric acid electrolysis is used for producing zirconium tetrachloride and zirconium oxychloride by a zircon sand boiling chlorination method; zirconium and hafnium are seperated to obtain zirconium oxide and hafnium oxide through a TBP-Hcl-HNO3 extraction method; and then, the chlorination and the purification are performed to obtain the nuclear-grade sponge zirconium and the nuclear-grade sponge hafnium. The method radically solves the environmental protecting environment difficultly treated in the zirconium oxychloride industry and the nuclear-grade sponge zirconium industry, and realizes complete industry chain circulation for combined production of the zirconium oxychloride industry, the gas-phase method silicon dioxide industry, the nuclear-grade sponge zirconium industry and the hydrochloric acid electrolysis industry.

The invention adopts a chemical method to remove impurities in raw materials, and a boiling chlorination method to prepare refined zirconium tetrachloride. The preparation method comprises the steps that: desilicated zirconium is ground into fine powder of 300 meshes to 500 meshes and then mixed with petrol coke or graphite of 50 meshes to 200 meshes according to the weight ratio of 100:16-20; then the mixture is added into a container which holds mineral acid with the use concentration of 3 mol/L to 7 mol/L, and reaction is carried out for 0.5 hour to 5 hours at the temperature ranging from 10 DEG C to 60 DEG C so as to remove the impurities; then, the reaction products are washed with water to be neutral, dried at the temperature of 70 DEG C to 120 DEG C and added into a boiling chlorination furnace which is provided with a filter; when the temperature inside the boiling chlorination furnace reaches 800 DEG C to 900 DEG C, chlorine with the flowing rate of 0.6 M/hour to 1.0 M/hour is led into the boiling chlorination furnace to react for 20 hours to 24 hours; and finally, refined zirconium tetrachloride with the content over 98 percent is obtained. Compared with the prior art, the preparation method has the advantages of eliminating the crude zirconium-tetrachloride purifying process with high energy consumption and low yield, shortening process flows, being beneficial to environmental protection and significantly reducing the production cost.

This disclosure relates to an improved process for preparing titanium tetrachloride comprising a first carbo-chlorination reaction comprising reacting ores comprising silica and/or zirconium with chlorine and a carbon compound at a temperature of about 900° C. to about 1300° C. to form an unscrubbed off gas comprising carbon monoxide, and using the unscrubbed off gas in a second carbo-chlorination reaction comprising titanium to form titanium tetrachloride.

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.

The invention relates to a pyrometallurgical separation method for a zirconia/hafnium dioxide mixture. The zirconia/hafnium dioxide mixture, carbon and pure bromine react at 650 DEG C for 1 hour to obtain bromides of zirconium and hafnium, the bromides of the zirconium and the hafnium are added into a fused salt mixture to perform rectification separation, the temperature of the tower bottom of a rectifying tower is kept below 357 DEG C for 2 hours, and a non-target is obtained; the non-target is kept at 357 DEG C for 5 hours, and a target, namely high-purity zirconia tetrabromide is collected; residue in a kettle is stored; rectification separation is performed in the same equipment, the temperature is increased to 400 DEG C and kept for over 5 hours, hafnium tetrabromide is obtained, and the zirconia tetrabromide and the hafnium tetrabromide are respectively subjected to metathesis to obtain pure zirconium and pure hafnium. The separation effect is good, and the equipment investment is economical, so that industrialization is facilitated. The pyrometallurgical separation method can fill a blank in China, and greatly contributes the localization of zirconia/hafnium nuclear materials.