77 results about "Vanadium oxytrichloride" patented technology

The invention provides a method for preparing high-purity vanadium pentoxide by using a vanadium-contained material. The method comprises the following steps: the vanadium-contained material is roasted to obtain a roasted product with the content of vanadium pentoxide below 49 wt%; then, the roasted product and a chlorinating agent are reacted in an inert atmosphere at a reaction temperature of 150-200 DEG C to obtain vanadium oxytrichloride gas and residues; the aftertreatment is performed for the vanadium oxytrichloride gas to obtain the high-purity vanadium pentoxide; and the chlorinating agent is selected from anhydrous aluminum trichloride or a mixture of anhydrous aluminum trichloride and sodium chloride. The method is mild in conditions, escapes vanadium in a gas form, is easy to separate vanadium from other substances, is higher in product purity, saves subsequent separation and impurity removal steps, and can obtain vanadium pentoxide products with the purity of not lower than 99%. The method is simple in technological process, short in needed reaction time, wide in raw material sources and easy to obtain raw materials, effectively reduces the production cost, reduces generation of three wastes, and is low in environmental pollution.

The invention discloses a system for producing a 3.5-valent high-purity vanadium electrolyte and a method thereof. According to the invention, fluidized bed gas phase hydrolysis is employed for hydrolyzing high-purity vanadium oxytrichloride to vanadic anhydride, vanadic anhydride in a reduction fluidized bed is accurately controlled and reduced to the low-valent vanadium oxide with vanadium average valence of 3.5, under applied microwave field, the 3.5-valent high-purity vanadium electrolyte is dissolved at low temperature by adding water and a sulfuric acid solution, and the electrolyte is directly used in all-vanadium redox flow battery new electric pile. The method for preparing vanadic anhydride through fluidized bed gas phase hydrolysis has the advantages of short flow and high efficiency, arrangement of an inner member in the reduction fluidized bed realizes accurate regulation and control of valence of the reduction products, dissolving of vanadium oxide is promoted and the vanadium ions are activated through special chemical effect of the microwave field, the electrolyte is prepared through dissolving in a low temperature zone, and the electrolyte activity is greatly increased. The system has the advantages of short flow, high efficiency cleaning, and stable product quality, is suitable for large-scale industrial production, and has good economic benefit and social benefit.

The invention discloses a water-borne rust-based anticorrosion coating which comprises the following raw materials by weight portion: 60-70 portions of styrene-acrylic emulsion, 30-40 portions of water-borne acrylic emulsion, 2-4 portions of alcohol ester-12 forming additive, 2-3 portions of vanadium oxytrichloride, 0.5-0.8 portions of benzotriazole, 3-4 portions of glycerine, 2-4 portions of 2- methyl-1,3- propylene glycol, 2-3 portions of hydroquinone, 1-2 portions of pyrocatechol, 2-3 portions of Ethylene Diamine Tetra Methylene Phosphonic Acid Sodium, 3-4 porptions of citric acid, 1-2 portions of modified adhesive, 0.1-0.2 portions of carboxymethyl cellulose and an appropriate amount of deionized water. The coating has good comprehensive performances including base body adhesive power, rot resistance, adhesive power, can completely avoid coating preprocessing processes, including sand blasting and shot-blasting, and can provide lasting and efficient protection for iron steels, the surfaces of which are rusty and not subjected to pre-processing; and accordingly, not only is the service life of an anti-corrosion finishing coat prolonged, but also the anti-corrosion coating process is simpler, and more efficient, economical and environment-friendly.

The invention provides a method for recovering vanadium contained slurry produced in the refining process of titanium tetrachloride and equipment thereof, wherein the method comprises: treating the vanadium contained slurry, converting the vanadium oxytrichloride in the vanadium contained slurry into vanadyl dichloride, and spraying the vanadium contained slurry to a chlorination system under the condition of controlling the temperature of the spraying point between 150 and 190 DEG C. The applied equipment comprises a chlorination furnace (1), a primary gravity dust precipitator (2) and a secondary gravity dust precipitator (3); the top of the secondary gravity dust precipitator (3) is provided with a vanadium contained slurry storage groove (4) which is connected with a single-screw pump (5), the single-screw pump (5) is connected with an atomizing device (6) and the atomizing device (6) is positioned inside the secondary gravity dust precipitator (3). Compared with the prior art, the method can effectively separate and recover the titanium tetrachloride in the vanadium contained slurry, thus reducing pollution, simplifying production process and saving production cost.

The invention discloses a system and method of high purity vanadium electrolyte preparation. Vanadium oxytrichloride as a raw material is precipitated by an ammonium salt, the precipitates are subjected to liquid reduction so that a low valent vanadium oxide is produced, a sulfuric acid solution and clean water are added into the low valent vanadium oxide and the mixture is treated under conditions of supersonic wave-assisted dissolution and activation at a low temperature so that a high purity vanadium electrolyte is formed. Through heat exchange between an ammonium salt and reduction tail gas and between a reduction product and fluidized nitrogen, heat is efficiently used. The ammonia gas in the reduction tail gas is recovered and used for vanadium precipitation so that ammonia gas recycling is realized. An inner member is arranged in a reduction fluidized bed so that accurate control of a reduction product valence is realized. Through use of supersonic wave-assisted dissolution and activation, the vanadium electrolyte is prepared at a low temperature and electrolyte activity is greatly improved. The method has the advantages of short process, high efficiency, cleaness and stable product quality, is suitable for large scale industrial production and has good economic benefits and social benefits.

The invention discloses a method for producing high-purity vanadium pentoxide through titanium tetrachloride refined vanadium-removed tailings. The method includes the seven processes: pre-treatment (1), chlorination (2), dust removal (3), drip washing (4), distillation purification (5), oxidation powdering (6) and tailing oxidation dechlorination (7). According to the method, in the pre-treatmentprocess, the titanium tetrachloride refined vanadium-removed tailings are subjected to oxidation dechlorination to obtain corresponding oxidized slag and circulating chlorine gas; in the process of feeding the oxidized slag into chlorination, selective chlorination of vanadium oxide is achieved, and chlorinated flue gas and chlorinated slag are obtained; the chlorinated flue gas is subjected to the processes of dust removal, drip washing and distillation purification, and high-purity vanadium oxytrichloride is obtained; and high-purity vanadium pentoxide powder is obtained from the high-purity vanadium oxytrichloride under action of oxygen-rich air and a catalyst. The method is suitable for treatment of the vanadium-removed tailings, and has the advantages of high raw material adaptability, good selectivity, low reaction temperature, chlorine gas recycling, energy saving and consumption reduction, environmental friendliness, high product additional value and the like.

The invention provides a preparation method for an ethylene-series random copolymer. The preparation method comprises the following steps: subjecting a reaction vessel to waterless oxygen-free treatment with nitrogen in a vacuum state, then adding a solvent, ethylene, alpha-olefin, unconjugated diene and a molecular weight regulator, and carrying out uniform mixing under stirring; adding a main catalyst, a cocatalyst and an activator for polymerization; adding ethanol to terminate polymerization and then adding an antioxidant; subjecting a glue solution obtained in the previous step to desolventization, and separating glue so as to obtain the product ethylene-series random copolymer; and drying the product so as to obtain dry glue, wherein the dry glue contains 0.8 to 1 wt% of the antioxidant; the main catalyst is alcohol-modified vanadium oxytrichloride; the cocatalyst is a mixture of aluminum diethyl monochloride and triethyldialuminum trichloride; the molecular weight regulator is diethyl zinc or hydrogen; the solvent is aliphatic alkane, cycloalkane or an aromatic compound; the activator is ethyl trichloroacetate; and the antioxidant is 2,6-di-t-butyl-p-cresol.

The present invention discloses a system and a method for producing powdery vanadium by using a chlorination process. According to the present invention, through fluidized bed oxidative granulation treatment, the mineral phase reforming and the mineral particle growth of the vanadium residue are achieved; through calcium fixing treatment with carbon dioxide, the decalcification of the vanadium residue is achieved; the vanadium in the vanadium residue is converted into gaseous vanadium oxytrichloride through selective chlorination, and most of impurities such as iron, manganese, phosphorus, titanium, silicon and the like are remained in the chlorinated residue so as to effectively separate vanadium and other impurities; the gaseous vanadium oxytrichloride is sequentially subjected to dust removal, leaching, settlement, rectification purification, catalytic oxidation and other processes to prepare the high-purity vanadium pentoxide powder (powdery vanadium); the chlorinated residue is subjected to gas phase hydrolysis dechlorination treatment, and the dechlorination residue returns to iron making; and with the system and the method, the clean comprehensive utilization of vanadium residue is achieved while the sensible heat of the high temperature flue gas of the chlorination furnace is effectively utilized so as to achieve the purposes of energy saving and consumption reduction.

The present invention provides a vanadium pentoxide purification method, which comprises: carrying out a reaction on vanadium pentoxide to be purified and anhydrous aluminum trichloride at a temperature of 150-200 DEG C in an inert atmosphere to obtain vanadium oxytrichloride gas and residue, and carrying out post-treatment on the vanadium oxytrichloride gas to obtain the high purity vanadium pentoxide, wherein the post-treatment comprises: condensing the vanadium oxytrichloride gas, carrying out hydrolysis, carrying out liquid-solid separation on the hydrolysis product to obtain a solid product and a liquid product, and carrying out pyrolysis on the slid product, wherein the residue and the liquid product can be recovered. According to the present invention, the method has characteristics of short process, effective production cost reducing, three-waste generation reducing, and low environmental pollution; the prepared vanadium pentoxide has the high purity (the purity of more than or equal to 99.99%) and can meet the requirements of vanadium aluminum alloys and all-vanadium batteries for aerospace and other fields; and the method provides the basis for the small batch or large-scale production of the high purity vanadium pentoxide.

The invention belongs to the fields of chemical industry and material, and concretely discloses a preparation system and a method thereof of a high-purity vanadium battery electrolyte. The preparation system takes industrial-grade vanadium oxytrichloride as a raw material, the industrial-grade vanadium oxytrichloride is subjected to distillation purification to obtain the high-purity vanadylic chloride with purity of more than 4N, the high-purity vanadium oxytrichloride is subjected to hydrolysis as well as chlorinity regulation and control, further, sulfuric acid is added for preparing the high-purity vanadium battery sulfuric acid-hydrochloric acid mixed acid electrolyte. The preparation system and the method have the advantages of strong raw material adaptability, simple flow, cleaning and no pollution, low production energy consumption and low operation cost, and controllable electrolyte quality, are suitable for large-scale continuous production of the high-purity vanadium battery electrolyte, and have good economic benefit and social benefit.

The present invention discloses a system and a method for producing high-purity vanadium pentoxide through clean chlorination of vanadium resources. According to the present invention, vanadium resources are subjected to granulation, oxidation, crushing, screening and other pretreatment processes, the pre-treated vanadium resources enter a chlorination furnace and are selectively chlorinated, thevanadium in the vanadium resources is converted into gaseous vanadium oxytrichloride, and most of impurities such as iron, chromium, calcium, phosphorus, manganese, titanium, silicon and the like in the vanadium resources are retained in the chlorinated residue so as to achieve the effective separation of vanadium and other impurities; the gaseous vanadium oxytrichloride is sequentially subjectedto dust removal, leaching, settlement, rectification purification, catalytic oxidation and other processes to prepare the high-purity vanadium pentoxide; the chlorinated residue is sequentially subjected to waste heat recovery, water washing dechlorination, settlement separation, filtering washing and other processes to obtain filter residue and a washing liquid, the filter residue returns to ironsmelting, and the washing liquid is subjected to evaporation crystallization to obtain a chlorine salt; and with the system and the method, the clean comprehensive utilization of vanadium resources is achieved while the sensible heat of the high temperature flue gas of the chlorination furnace and the high temperature chlorination residue is effectively utilized so as to achieve purposes of energy saving and consumption reduction.

The present invention provides a system and method for purifying vanadium pentoxide. Industrial grade vanadium pentoxide is converted to vanadium oxytrichloride by low temperature fluidizing chlorination, wherein chlorinating gas is preheated via heat exchange between fluidizing gas and chlorination flue gas, and an appropriate amount of air is added to enable a part of carbon powder to combust so as to achieve a balanced heat supply during the chlorination, thereby increasing the efficiency of chlorination and ensuring good selectivity in low temperature chlorination. The vanadium oxytrichloride is purified by rectification, and then subjected to plasma oxidation, thereby obtaining a high-purity vanadium pentoxide product and chlorine gas. The chlorine gas is returned for low temperature chlorination. The system and method have advantages of favorable adaptability to raw material, no discharge of contaminated wastewater, low energy consumption and chlorine consumption in production, stable product quality, etc.

The present invention provides a system and method for purifying and preparing vanadium pentoxide powder. Industrial grade vanadium pentoxide is converted to vanadium oxytrichloride by low temperature fluidizing chlorination, wherein chlorinating gas is preheated via heat exchange between fluidizing gas and chlorination flue gas, and an appropriate amount of air is added to enable a part of carbon powder to combust so as to achieve a balanced heat supply during the chlorination, thereby increasing the efficiency of chlorination and ensuring good selectivity in low temperature chlorination. The vanadium oxytrichloride is purified by rectification, and then subjected to fluidized gas phase ammonification, thereby obtaining ammonium metavanadate, and further obtaining a high-purity vanadium pentoxide powder product through fluidized calcination. The system and method have advantages of favorable adaptability to a raw material, no discharge of contaminated wastewater, low energy consumption and chlorine consumption in production, stable product quality and so on.

The invention discloses a system and method for high-value comprehensive utilization of a high-chromium vanadium slag. Vanadium, chromium and iron in the high-chromium vanadium slag are converted through selective chlorination by a circulating fluidized bed to corresponding gaseous chlorides, and most impurities such as manganese, titanium, and silicon are remained in the chlorinated residue, so that valuable elements are separated from other impurities. The gaseous chlorides separates crude chromium trichloride by high temperature dust collection, separates crude ferric chloride by medium temperature dust collection, and separates crude vanadium oxychloride from low temperature elution. The crude chromium trichloride is dissolved and stirred to obtain an aqueous solution to recover the chromium salt; the crude ferric chloride and chlorinated residue are hydrolyzed and dechlorinated by high temperature to obtain an oxidized slag for iron production; and the crude vanadium oxychloride vanadium is subjected to sedimented purification, rectification and refinement, and catalytic oxidation to obtain high-purity vanadium pentoxide powder. By means of the system and the method, the high-value comprehensive utilization of the high-chromium vanadium slag is achieved, and the chromium chloride solution and high purity vanadium pentoxide powder are produced by the method of one-step of chlorination with multi-step recovery.

The invention belongs to the fields of metallurgy and chemical industry, and specifically discloses a system and a method for preparing high-purity vanadium pentoxide powder through an efficient cleanchlorination method, wherein industrial-grade vanadium oxide is converted into vanadium oxytrichloride by combing fluidization and carbon chlorination, two-stage dust removal and four-stage leachingare performed to obtain crude vanadium oxytrichloride, and the crude vanadium oxytrichloride is subjected to purification, catalytic oxidation and calcination to obtain the high-purity vanadium pentoxide powder. According to the present invention, the too high furnace temperature is prevented by spraying the vanadium oxytrichloride slurry into the boiling chlorination furnace; the chlorine gas isregenerated by blowing clean oxygen-rich air into the catalytic oxidation fluidized bed; the hydrogen chloride is recycled by returning the hydrochloric acid to the catalytic oxidation fluidized bed;and the system and the method have advantages of strong raw material adaptability, self-circulation of chlorine gas, no vanadium-containing hydrochloric acid emission, low production energy consumption, low operation cost, stable product quality and the like, are suitable for the large-scale industrial production of high-purity vanadium pentoxide powder with the purity of more than 4N, and have good economic and social benefits.

The invention discloses a corrosion-resistant metal surface silicane treating agent. The corrosion-resistant metal surface silicane treating agent is characterized in that: each liter of a mixed solution which is prepared from the following components comprises the components in parts by weight (gram) of: 23-30 g of N-phenyl-3-aminopropyl trimethoxysilane, 21-26 g of carbamido propyl triethoxysilane, 180-210 g of a water-based nanometer zinc oxide material, 3-5 parts of sodium ethylenediamine teramethylene phosphonate, 3-4 g of 2-methyl-1,3-propylene glycol, 2-3 g of ethylene glycol monobutyl ether, 2-3 g of oxalic acid, 2-3 g of sodium monofluorophosphate, 1-2 g of tetrahydrofuran, 1-2 g of vanadium oxytrichloride, 0.8-1 g of plant ash, 0.6-0.8 g of tert-butyl hydroperoxide, and the balance of water. The water-based nanometer zinc oxide material prepared by the technology of the invention has high dispersion stability and efficient adhesiveness, and is uniformly coated on the metal surface to enable the metal to have high compactness and anti-ion permeability; and due to the addition of the auxiliary agents such as the sodium ethylenediamine teramethylene phosphonate, the corrosion-resistant metal surface silicane treating agent adds the compactness of a silciane absorption film, improves film forming quality, and is environment-friendly and free from pollution.

The invention belongs to the technical field of chemical engineering and metallurgy, and particularly relates to a method for preparing vanadium oxychloride through low-temperature chlorination of blast furnace slag. The technical problem to be solved by the invention is to provide the method for preparing the vanadium oxytrichloride by low-temperature chlorination of the blast furnace slag, whichcomprises the following steps: mixing the blast furnace slag and a carbonaceous reducing agent, preheating, and introducing chlorine to react to obtain a vanadium oxytrichloride-containing mixed product. According to the method, vanadium in the blast furnace slag can be well recycled.