76results about "Scandium oxides/hydroxides" patented technology

The invention provides a method for recovering valuable metals from sulfuric acid process titanium white waste acid through steel slag treatment. The method comprises the following steps: recovering to obtain ferrous sulfate heptahydrate crystals; s2, recovering Sc metal, and extracting the filtrate in the step S1 to obtain a first loaded organic phase and a first raffinate; the first loaded organic phase is washed with alkali liquor, and a second loaded organic phase and washing water are obtained through reverse extraction; treating the washing water to obtain titanium phosphate; back-extracting the second loaded organic phase by using alkali liquor, carrying out filter pressing to obtain crude Sc (OH) 3, and refining to obtain scandium oxide; extracting the first raffinate to obtain a third loaded organic phase and a second raffinate, pickling the third loaded organic phase, reversely extracting with ammonia water, adding phosphoric acid for reaction, and treating to obtain titanium phosphate; and steel slag is added into the second raffinate for neutralization leaching and hydrolysis vanadium precipitation, vanadium-rich slag is obtained through filtering, and then the vanadium electrolyte is prepared. According to the method, iron is separated through crystallization, scandium and titanium are separated through extraction, vanadium-rich slag is separated through neutralization and precipitation, and efficient utilization of resources is achieved.

The embodiment of the invention relates to a scandium-based negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving a scandium-containing compound in deionized water to prepare a homogeneous solution, adding a coagulator, and stirring and mixing to obtain a first solution; placing the first solution in a heating device, and enabling a molecular chain of the coagulator to be broken and dissolved to form a cross-linked sol containing a scandium ion solution; standing the sol at room temperature to obtain solid gel; carrying out hot-pressing curing on the solid gel to obtain a cured sample with uniformly dispersed scandium ions; placing the cured sample in a tubular furnace for heat treatment to obtain a scandium nitride-containing carbon matrix, then placing the scandium nitride-containing carbon matrix in a surface oxidant solution for soaking to modify the scandium nitride-containing carbon matrix, washing the modified sample with water, performing suction filtration, and drying to obtain a modified scandium-based carbon matrix; or directly washing and filtering the scandium nitride-containing carbon matrix, and drying to obtain an unmodified scandium-based carbon matrix; and finally, calcining in an oxidizing atmosphere to remove residual carbon so as to obtain the scandium oxide nanoparticles.

The invention relates to the technical field of hydrometallurgy, in particular to a method for recycling scandium oxide from scandium slag, scandium oxide and application of the scandium oxide. According to the method, the scandium residues obtained from MHP are subjected to acid leaching, then pass through an N1923 extraction section, then pass through a P350 extraction section and then pass through an N235 extraction section, and finally a scandium chloride solution is subjected to scandium precipitation treatment and roasting, so that high-purity scandium oxide is obtained. The method has the advantages that an alkali reverse flow required by a scandium-containing loaded organic phase is avoided, the whole extraction section can be performed in an extraction tank without filtering operation, the automation degree is high, the continuity is good, the flow is short, and the acid consumption is greatly reduced, meanwhile, the amine extraction agent N1923 is firstly used and has strong selectivity on scandium, and when the amine extraction agent N1923 is used for separating most impurities in the first extraction section, the scandium content is greatly reduced; the temperature required by extraction and reverse extraction is lower than the temperature required by an acidic phosphine extraction agent, so that aging and deterioration of an organic phase are avoided, the stage number of the reverse extraction stage is greatly reduced, and the production cost is remarkably reduced.

The invention provides a beneficiation-metallurgy combined comprehensive utilization process for dilute separation tailings, which comprises the following steps: carrying out ore grinding and flotation treatment on the dilute separation tailings to obtain fluorite rough concentrate and flotation tailings; magnetically roasting the mixed reducing agent and the flotation tailings, and magnetically separating to obtain magnetically separated rough concentrate and magnetically separated rough tailings; carrying out fine grinding and magnetic separation on the magnetic separation rough concentrate to obtain a magnetic separation iron concentrate product and magnetic separation concentrate tailings; the magnetic separation coarse tailings and the magnetic separation fine tailings are mixed, and then acid washing liquid and acid washing residues are obtained after acid washing and solid-liquid separation are conducted in sequence; and carrying out pressurized acid leaching, solid-liquid separation and extraction on the pickling residues to obtain scandium oxide and niobium oxide. By adopting the flotation-magnetizing roasting-magnetic separation-acid pickling-pressurized acid leaching combined process, the fluorite coarse ore, the iron ore concentrate, the rare earth leaching solution and the niobium-scandium leaching solution are obtained, the comprehensive utilization rate of the tailings is greatly increased, the discharge amount of the tailings is reduced, the acid consumption of tailings treatment is reduced, the environmental pressure is reduced, and the benefits of enterprises are improved.

The invention provides a preparation method of a grinding aid for Sc / O doped sulfide solid electrolyte, which comprises the following steps: mixing and reacting ethanolamine thioglycolate, 2-vinyl-5, 5-dimethyl-1, 3, 2-borane dioxide, 1-allyl-3-ethylimidazolium hexafluorophosphate and potassium ethoxide in a solvent, reacting the ethanolamine thioglycolate with the 2-vinyl-5, 5-dimethyl-1, 3, 2-dioxo-borane, and reacting with the potassium ethoxide to obtain the grinding aid for Sc / O doped sulfide solid electrolyte. The grinding aid for the Sc / O doped sulfide solid electrolyte is prepared by the following steps: carrying out sulfydryl-alkenyl addition reaction on ethanol amine thioglycolate and 1, 2-borane dioxide, carrying out sulfydryl-alkenyl addition reaction on ethanol amine thioglycolate and 1-allyl-3-ethylimidazolium hexafluorophosphate, and removing a solvent after the reaction is finished, so as to obtain the grinding aid for the Sc / O doped sulfide solid electrolyte. The grinding aid can improve the microstructure of the electrolyte material, thereby enhancing the conductivity and safety of the electrolyte material.

The application discloses a kind of red mud gradient depth purification-rare earth-radioactivity synergistic target purification method, by " hierarchical pretreatment and microwave modification→three-stage gradient dealkalization→rare earth-radioactivity synergistic target purification→full quantization recycling" four-stage integrated process, realize red mud harmless and high-value utilization.The three-stage gradient dealkalization uses microwave-CO2-biological synergic system, after dealkalization pH≤8.0, Na2O content<1%;Rare earth-radioactivity purification is extracted by HDES and coupled with multi-ligand magnetic material system, light rare earth recovery rate≥95%, middle heavy / rare earth recovery rate≥90%, U / Th removal rate≥95%;Full quantization recycling realizes red mud total utilization rate≥98.5%, wastewater reuse rate≥95%, every ton of red mud fixed CO2≥0.2 tons.The application is suitable for various high-alkali, containing radioactive and rare earth red mud treatment, with environmental benefits and economic benefits.

The invention provides a treatment method of chlorination process titanium dioxide solid waste residues, and belongs to the technical field of resources and environments. According to the method, the chlorination process titanium dioxide solid waste residues are dissolved and extracted step by step, high-value metal in the solid waste residues is recycled respectively, residual substances are evaporated and crystallized to obtain mixed salt, and zero emission and full resource utilization of the solid waste residues are achieved.

The invention discloses a titanium white waste acid treatment process, and relates to the technical field of industrial waste regeneration. The titanium white waste acid is subjected to microfiltration and membrane electrolysis treatment, sulfuric acid is separated and recycled under the control of constant pressure and constant current, and residual liquid is subjected to electrodialysis treatment to oxidize ferrous ions into ferric hydroxide precipitates and calcined into ferric oxide; carrying out reduction leaching on the titanium-containing material, hydrolyzing to generate metatitanic acid, and calcining to obtain titanium dioxide; oxidizing the hydrolysate to precipitate vanadate, and calcining to obtain vanadium pentoxide; adjusting the pH value of the filtrate, selectively adsorbing scandium through a biological adsorption column, precipitating and calcining the eluent to obtain scandium oxide, and regenerating and recycling the adsorbent through acid pickling. According to the process, through multi-stage treatment and biological adsorption, resource recycling of sulfuric acid, iron, titanium, vanadium and scandium components in the waste acid is achieved, the process is clean and efficient, secondary pollution of a traditional process is avoided, and a green low-carbon solution is provided for waste acid treatment in the titanium dioxide industry.

This application belongs to the field of rare earth element recovery technology and discloses a method for recovering scandium oxide from scandium-oxalic acid-containing wastewater. The method involves first mixing a phosphoric acid extractant and a solvent oil to obtain a first mixture. The scandium-oxalic acid-containing wastewater is then filtered. The first mixture is mixed with the filtered scandium-oxalic acid-containing wastewater at a volume ratio of organic phase to aqueous phase of 1:20-30. The mixture is then subjected to countercurrent extraction, stirring, and clarification to obtain a second mixture. Subsequently, the organic phase in the second mixture is back-extracted using an alkaline solution containing ethanol to obtain scandium hydroxide. Scandium hydroxide is then dissolved in hydrochloric acid solution, and finally, scandium is precipitated using oxalic acid solution to obtain scandium oxalate. The scandium oxalate is then calcined at high temperature to obtain scandium oxide. Through the above design, the scandium oxide recovery rate of this application reaches 97.9%, and the scandium oxide recovered by this method has a purity of not less than 99.5%.

The embodiment of the present application relates to a kind of scandium negative electrode material and its preparation method and application.The preparation method includes: the homogeneous solution obtained by dissolving the ion-free aqueous solution of scandium-containing compound, first solution is obtained by adding coagulation agent and stirring mixing;First solution is placed in heating device, the molecular chain of coagulation agent is broken and dissolved, and the sol of cross-linked scandium ion-containing solution is formed;The solid gel is obtained by the sol at room temperature;Solid gel is heat-pressed and cured to obtain the solidified sample of scandium ion uniform dispersion;The carbon matrix containing scandium nitride is obtained by heat treatment of solidified sample in tube furnace, and the carbon matrix containing scandium nitride is modified by soaking in surface oxidizing agent solution, the modified sample is washed with water and suction filtered, and the modified scandium-based carbon matrix is obtained after drying;Or the carbon matrix containing scandium nitride is directly washed with water and suction filtered, and the unmodified scandium-based carbon matrix is obtained after drying;Finally, under oxidizing atmosphere, the residual carbon is removed to obtain scandium oxide nanoparticles.

The invention relates to a method for treating a residue obtained from the chloride process, wherein the residue comprises the components titanium dioxide, coke, an inert metal oxide, and an iron-containing component. Further, the invention refers to the use of this method to separate the components contained in said residue, and to the use of the separated components in the chloride process for obtaining titanium dioxide.

The invention relates to a process for producing scandium oxide by comprehensively recovering bauxite. According to the method, scandium compounds in the red mud are activated through bubbling treatment, the pH value of a liquid phase is smaller than or equal to 10.5, after multi-stage filtration, insoluble residues are leached through a sodium carbonate-sodium bicarbonate solution, and a scandium-containing sodium carbonate-sodium bicarbonate solution is obtained; after filtering the obtained solution, mixing a scandium-containing alkaline aluminate solution with a scandium-containing sodium carbonate-sodium bicarbonate solution to prepare a scandium-containing hydrolysis concentrate; carrying out two-stage sulfuric acid leaching on the filtered scandium-containing hydrolysis concentrate; the scandium-containing sulfuric acid solutions obtained after two-stage leaching are mixed, alkali is added to adjust the pH to 4.5-5.5, and scandium sulfate without impurity elements is precipitated; then treating with caustic alkali until the pH is not more than 5.6, and carrying out selective precipitation of scandium; treating scandium sulfate with a sulfuric acid solution to obtain basic scandium sulfate; treating the obtained basic scandium sulfate with oxalic acid to convert the basic scandium sulfate into scandium oxalate; filtering the obtained scandium oxalate precipitate; and calcining scandium oxalate to remove carbon and obtain scandium oxide, wherein the content of Sc2O3 in the calcined product is at least 99.0 mass percent.

For the purpose of reducing contamination of scandium oxide products, the present disclosure provides a method for removing at least one metal contaminant from a scandium (Sc) concentrate. The method is based on contacting the Sc concentrate with an ion exchange resin to obtain a purified Sc eluate or raffinate. The first and second ion exchange resins are strong acid cation resins having sulfonic acid functional groups in the potassium or sodium form. The purified Sc eluate or raffinate can be used to produce a scandium oxide product having reduced amounts of metal ion contaminants.

The invention provides Sc2O3 porous aerogel as well as a preparation method and application thereof. According to the method, ScCl3. 6H2O is selected as a scandium source and is non-toxic, and the reaction activity of the ScCl3. 6H2O is controllable compared with that of organic metal alkoxide. In addition, compared with supercritical drying and freeze drying, the normal-pressure drying method for graded drying is lower in cost and higher in safety, and graded drying can effectively protect the nano structure and reduce cracking and collapse of the sample as much as possible. In addition, the scandium oxide aerogel is synthesized for the first time, and the product is high in porosity, large in specific surface area and good in heat insulation performance and has positive significance in application of aerogel materials in various fields.

The present application relates to the field of adsorption separation technology, and particularly relates to a selective removal agent, a preparation method and application thereof. The selective removal agent contains calcium-scan double-metal layered hydroxide and diatomite, and the mass ratio of diatomite to calcium-scan double-metal layered hydroxide is greater than or equal to 0.14. The chemical formula of the calcium-scan double-metal layered hydroxide is [Ca x Sc(OH) y ]OH, x is 2-3, and y is 6-8. The selective removal agent provided in the present application has good selectivity to heat-stable salts and hydrogen phosphate, the selectivity adsorption ratio of hydrogen phosphate to heat-stable salt anions is greater than 6000, efficient separation of heat-stable salts and hydrogen phosphate can be achieved, the stability is good, the working cycle can be prolonged, and the selective removal agent is suitable for industrial popularization.

The invention discloses a method for extracting scandium from a byproduct FeSO4 # imgabs0 # H2O in a sulfuric acid process titanium dioxide waste acid concentration process, and belongs to the field of valuable resource recovery. The method comprises the following steps: mixing and dissolving FeSO4 # imgabs1 # H2O and water, filtering to obtain a ferrous sulfate solution, freezing, crystallizing and filtering to obtain a scandium-containing solution, and circulating for multiple times to increase the scandium concentration; then ferric iron in the solution is reduced, the pH is adjusted with barium hydroxide, scandium is precipitated, and a mixed solid of barium sulfate and scandium hydroxide is separated out; the method comprises the following steps: dissolving scandium hydroxide with acid, filtering and washing, precipitating scandium with oxalic acid or sodium oxalate, and finally roasting scandium oxalate at high temperature to prepare scandium oxide with Sc2O3 greater than or equal to 99.99% and Sc2O3 / REO greater than or equal to 99.9999%. The method has the advantages of being convenient to operate, simple in technological process, low in production cost and good in environmental protection benefit, industrialization is easy, the scandium element in the sulfuric acid process titanium dioxide waste acid concentration byproduct can be efficiently recycled, and efficient utilization of resources is achieved.

The application belongs to the technical field of scandium separation and purification, and particularly relates to a method for separating and purifying scandium from crude nickel-cobalt hydroxide, which comprises the following steps: using 0.1-0.5 mol / L dilute sulfuric acid to leach the crude nickel-cobalt hydroxide, and filtering to obtain a scandium-containing leaching solution, wherein the ratio of the dilute sulfuric acid to the crude nickel-cobalt hydroxide is (3-5) mL:1 g, and the molar ratio of sulfuric acid to scandium is (3-5):1; using an extractant comprising Cyanex572 and Aliquat336 to treat the scandium-containing leaching solution to obtain a scandium-containing organic phase; using an oxalic acid solution to back-extract the scandium-containing organic phase to obtain scandium oxalate precipitation; and calcining the scandium oxalate precipitation to obtain scandium oxide. The technical scheme adopts a selective leaching process to realize efficient separation of scandium from main metals nickel and cobalt at the front end, has low reagent consumption, a short process, and great cost advantages; a new type of synergistic extraction technology is adopted, which has super-high selectivity and extraction capacity for scandium, the prepared scandium oxide has a purity of greater than or equal to 96%, and the scandium recovery rate is greater than or equal to 89%.

A method for extracting scandium from scandium-containing materials comprises repulping a cake of a scandiumcontaining material using a solution of a sodium carbonate and sodium bicarbonate mixture, carbonization leaching the scandiumcontaining material using the soda-bicarbonate solution in a single step, filtering the leached scandium-containing material, and isolating a scandium concentrate. The carbonization leaching of the scandium-containing material is performed using a solution of a sodium carbonate and sodium bicarbonate mixture with a concentration of 130-350 of Na2CO3 and 2-100 of NaHCO3 at a pulp pH of 9.5-11.0 and at a temperature of 20-90°C. The required pulp pH value is maintained by treating the pulp with a gas-air mixture containing CO2. Isolation of the scandium concentrate from the leaching filtrate is carried out in a single step by treating the filtrate with an alkali solution. The method makes it possible to increase the scandium extraction yield, to simplify the process flow scheme and to eliminate the use of sorbents and extractants.

The utility model belongs to the technical field of chemical industry production, and provides a system for recovering hydroxide from oxalic acid waste liquid, which comprises a reaction module, a second reaction module, a third reaction module, a fourth reaction module, a fifth reaction module and a sixth reaction module, wherein the reaction module is used for mixing the oxalic acid waste liquid with an organic solution to obtain an organic phase containing transition metal ions and mixing the organic phase with alkali liquor to obtain a first mixture containing hydroxide precipitate; the separation module is used for separating the hydroxide precipitate from the mixture to obtain a solid; a washing module for obtaining a second mixture by washing the solids with a detergent; and the solid-liquid separation module is used for separating the detergent in the second mixture from the hydroxide precipitate to obtain the hydroxide precipitate. According to the utility model, the washing module is used for washing the hydroxide precipitate separated from the separation module, and the washing agent and the hydroxide precipitate are separated through the solid-liquid separation module after washing, so that impurities on the hydroxide precipitate are removed, and the quality of subsequent production procedures is improved.

The invention discloses a method for extracting scandium impurities in an MHP wet process and producing scandium oxide, which comprises the following steps: by taking pickle liquor in the MHP wet process as a raw material, a composite solvent containing phosphorus and carboxylic acid substances as an extracting agent, dilute sulphuric acid as a washing solution and an oxalic acid solution as a strip liquor, removing iron, extracting, washing and stripping to obtain scandium oxalate, and drying and calcining to obtain scandium oxide. According to the method, the phenomena of three-phase emulsification and interface flocculation caused by abnormal interfacial tension in the scandium extraction process are improved by adding the non-silicon defoaming agent, the extraction stage efficiency is improved, the production efficiency is guaranteed, the occupied area of equipment is reduced, meanwhile, the necessary multi-stage separation and deep purification steps in traditional coarse scandium preparation are omitted, and the economic value is high.

The invention relates to technology for the comprehensive processing of bauxites, specifically red mud, to obtain scandium oxide. The present method includes filtering red mud, reslurrying the red mud cake, sparging the mud slurry, and subjecting same to carbonate-bicarbonate leaching and filtration to obtain a scandium-containing product solution. The obtained solution is mixed with an alkali-aluminate solution to obtain a precipitate which is filtered and releached to obtain a scandium-containing alkali-aluminate solution and an insoluble precipitate. The precipitate is releached to obtain a scandium-containing sodium carbonate-bicarbonate solution. The scandium-containing solutions are mixed to obtain a concentrate from which scandium is extracted by two-stage sulphuric acid leaching to obtain basic scandium sulphate which is then treated with oxalic acid. The obtained scandium oxalate precipitate is filtered and calcined to obtain scandium oxide. The invention makes it possible to achieve high scandium extraction.

The invention discloses a method for recycling high-purity scandium by separating scandium and zirconium in a hydrochloric acid system, and belongs to the technical field of strategic metal separation and purification. Epoxy weak-base anion exchange resin is adopted as an adsorbent, scandium is preferentially adsorbed by utilizing the specific coordination effect of functional groups on the resin and scandium ions, and the scandium is recycled; and efficient separation of scandium and zirconium is realized through selective desorption of an eluent sodium chloride solution. According to the method, high-selectivity separation of the alkalescent epoxy anion exchange resin is utilized, efficient separation of Sc (III) and Zr (IV) is achieved under the weak acid condition, the limitation that a traditional adsorbent is insufficient in selectivity is remarkably broken through, the method has the advantages of being low in operation cost, high in separation efficiency and green in process, a subversive solution is provided for large-scale purification of strategic metal scandium, and the method is suitable for industrial production. The method is of great significance to guarantee the security of national defense and high-tech industrial resources.

To provide a method for recovering scandium through ion exchange treatment using chelate resin an acidic solution containing scandium and chromium, the method enabling efficient removal of chromium remaining in the chelate resin, and enabling productive and efficient recovery of scandium.SOLUTION: A method for recovering scandium from acidic solution containing scandium and chromium is provided, including an ion exchange treatment step including a step of causing a chelate resin to adsorb the scandium in the acidic solution, a step of eluting the scandium from the chelate resin, a step of bringing a sulfuric acid solution into contact with the chelate resin and removing the chromium adsorbed to the chelate resin, and the method causes the scandium to be recovered from the obtained scandium eluent. In the chromium removal step in the ion exchange treatment step, the chelate resin is brought into contact with sulfuric acid solution at a temperature of 32°C or higher and consequently the chromium is removed, and the chelate resin after the chromium has been removed is repeatedly used.SELECTED DRAWING: Figure 3

This invention relates to the field of hydrometallurgical technology, specifically to a method for recovering scandium oxide from scandium slag, scandium oxide, and its applications. The invention involves acid leaching of scandium slag obtained from MHP (methods for hydrometallurgical processes), followed by an N1923 extraction stage, then a P350 extraction stage, followed by an N235 extraction stage. Finally, a scandium chloride solution is precipitated and calcined to obtain high-purity scandium oxide. This method avoids the alkaline reaction process required for scandium-loaded organic phases. The entire extraction process can be carried out in the extraction tank without filtration, resulting in high automation, excellent continuity, a short process, and significantly reduced acid consumption. Furthermore, this invention uses the amine extractant N1923, which has strong selectivity for scandium. When used as the first extraction stage to separate most impurities, the extraction and back-extraction temperatures are lower than those required by acidic phosphine extractants, preventing aging and deterioration of the organic phase. This significantly reduces the number of back-extraction stages and substantially lowers production costs.

The invention belongs to the technical field of scandium separation and purification, and particularly relates to a method for separating and purifying scandium from crude nickel cobalt hydroxide, which comprises the following steps: using 0.1-0.5 mol / L dilute sulphuric acid to leach crude nickel cobalt hydroxide, filtering to obtain scandium-containing leachate, the ratio of dilute sulphuric acid to crude nickel cobalt hydroxide is (3-5) mL: 1g, and the molar ratio of sulphuric acid to scandium is (3-5): 1; carrying out scandium extraction treatment on the scandium-containing leachate by using an extraction agent comprising Cyanex572 and Aliquat 336 to obtain a scandium-containing organic phase; carrying out reverse extraction on the scandium-containing organic phase by using an oxalic acid solution to obtain scandium oxalate precipitate; and calcining the scandium oxalate precipitate to obtain scandium oxide. According to the technical scheme, the selective leaching process is adopted, efficient separation of scandium and main metal nickel and cobalt is achieved at the front end, reagent consumption is low, the process is short, and the large cost advantage is achieved; a novel synergistic extraction technology is adopted, ultrahigh selectivity and extraction capacity on scandium are achieved, the purity of prepared scandium oxide is larger than or equal to 96%, and the recovery rate of scandium is larger than or equal to 89%.

The utility model discloses a system for preparing metal oxide through nitrate pyrolysis and recycling nitric acid step by step. The system comprises a heating melting tank, an atomization pyrolysis furnace, a first dust collector, a first heat exchanger, a dynamic pyrolysis furnace, a second dust collector, a second heat exchanger and a nitric acid regeneration device. Nitrate is heated and melted to obtain nitrate hot fluid, the nitrate hot fluid is atomized and pyrolyzed at low temperature to obtain a precursor, and then the precursor is fed into a dynamic pyrolyzing furnace for thermal decomposition to obtain metal oxide powder. Condensing the dust-collected gas of the atomization pyrolyzing furnace through a heat exchanger to directly collect a first part of finished product nitric acid; the tail gas of the dynamic pyrolyzing furnace passes through a heat exchanger and then is sent to a nitric acid regeneration device to recover a second part of finished nitric acid. According to the system, the size of the atomization pyrolyzing furnace is obviously reduced, the pyrolyzing temperature is reduced, the heat energy utilization efficiency is improved, and the energy cost is greatly reduced. The treatment capacity of the nitric acid regeneration device is remarkably reduced, and the nitric acid regeneration and recovery cost is reduced, so that energy conservation and emission reduction are realized.

To provide a system for removing at least one kind of a metal contaminant from a stock solution comprising Sc.SOLUTION: There is provided a process for removing at least one kind of a metal contaminant from a stock solution comprising Sc, comprising the steps of: a) contacting the stock solution with an ion exchange resin capturing Sc and the at least one kind of a metal contaminant so as to produce a metal ion exchange resin complex; and b) scrubbing the metal resin complex with a scrubbing solution comprising a carboxylate ion, so as to produce a Sc ion exchange resin complex and a spent carboxylate solution, which can be treated by electrodialysis to regenerate the carboxylate ion required for scrubbing.SELECTED DRAWING: None

The application discloses a method for separating niobium oxide and scandium oxide from Baiyunebo tailings, which comprises the following steps: normal-pressure acid leaching, precipitating rare earth complex salt by adopting sodium sulfate on the leaching solution, removing iron and titanium in the organic phase by using hydrochloric acid-hydrogen peroxide washing liquid, and obtaining the co-precipitation alkali cake of niobium hydroxide and scandium hydroxide by back-extracting the organic phase by sodium hydroxide, and the alkali cake is reacted with a mixed solution of oxalic acid and ammonia water, so that three products of rare earth sulfate complex salt, niobium oxide and scandium oxide can be obtained.

The invention provides a method for extracting high-purity scandium oxide based on silicon-based tributyl phosphate resin, and belongs to the technical field of purification. The method comprises the following steps: mixing the titanium white waste acid with silicon-based tributyl phosphate resin, adding a pre-prepared acid solution, communicating purified resin and enriched resin with the acid solution, enabling the resin to become poor resin after multiple times of drainage, after one round of adsorption is finished, reversely adding the silicon-based tributyl phosphate resin into an alkali solution, desorbing, and electrolyzing a desorption solution, thereby obtaining the titanium white waste acid. A high-purity scandium oxide compound is obtained; the silicon-based tributyl phosphate resin is added, and a large amount of scandium oxide can be selectively adsorbed by utilizing the high adsorbability of the resin, so that the scandium oxide is separated out, and impurities such as Fe, Si, Ni and Ca are preliminarily removed. The method comprises the following steps: adding an alkaline solution into enrichment resin for desorption to obtain a desorption solution containing high scandium oxide;