8results about How to "High separation factor" patented technology

The application provides a preparation method of Zr-BDC film and application of the Zr-BDC film in separation of organic matters. The application directly uses zirconium propoxide as the only zirconium source in a mother liquor, and continuously synthesizes Zr-BDC film through a solvothermal method; the content of the metal source in the mother liquor is extremely low, so that the film thickness is still thin after three times of solvothermal growth, and the preparation of a high-flux film is facilitated. The application uses a ligand / metal molar ratio of up to 20, and provides application of the Zr-BDC film with less defect sites in separation of MeOH / MTBE. The Zr-BDC film prepared by the application exhibits optimal separation performance of MeOH / MTBE, and when 5wt.% MeOH / MTBE is separated at 40 DEG C, the film flux can reach 5.68kg·m ‑2 ·h ‑1 -1h-1, the separation factor is up to 25802, and the operation stability is greater than 5 days.

The invention relates to a solvent extraction method for improving a separation factor of trivalent americium and curium, which comprises the following steps: preparing an extraction organic phase solution containing an extraction agent and a synergistic extraction agent, the extraction agent being dithiophosphonic acid with long chain hydrocarbon substituents on two substituted benzene rings on phosphorus atoms; then co-extracting Am (III) / Cm (III) by using an extraction organic phase solution; carrying out selective reverse extraction on Cm (III) by adopting a water-phase solution containing a water-soluble complexing reverse extraction agent; and finally, carrying out primary reverse extraction on the residual Am (III) in the organic phase by using HNO3. According to the method provided by the invention, the separation factor of the trivalent americium and curium is increased from about 4 to more than 10, so that the separation factor of the americium and curium is greatly increased. Compared with the prior art, the extraction agent adopted in the method is higher in stability, the separation factor of americium and curium is high, and separation of trivalent actinide lanthanum and americium and curium can be achieved in one extraction and separation process in a synergistic extraction and complexing reverse extraction mode.

The invention provides an antimony soot arsenic-antimony separation method based on a TBP and TOA synergistic extraction system, and relates to the technical field of solid waste metal recovery technologies. An antimony soot arsenic and antimony separation method based on a TBP and TOA synergistic extraction system comprises the following steps that S1, hydrochloric acid lixivium pretreatment and raw material treatment are conducted, antimony soot is leached through hydrochloric acid, and after solid-liquid separation is conducted, acid lixivium is obtained; s2, preparing a mixed extraction agent; s3, countercurrent extraction separation; s4, carrying out reverse extraction on the loaded organic phase to recover arsenic; and S5, treating the raffinate to recover antimony. The As (III) / Sb (III) mixed solution is directly treated without oxidation / reduction pretreatment; the arsenic-antimony separation coefficient is greatly improved through the synergistic effect of the extraction agent; the reagent loss and wastewater discharge are reduced, and the industrial continuous production requirement is met.

This invention relates to the field of food filtration technology and discloses a mango juice black spot filtration device and its filtration method. The device includes a frame, a motor fixedly connected to one side of the top of the frame, an organic housing fitted and fixedly connected to the inner wall of the top of the frame, a rotating shaft fixedly connected to the output end of the motor, and a belt fitted and rotatably connected to the outer wall of the rotating shaft. It also includes a black spot filtration mechanism, comprising a drive shaft rotatably connected to the inner wall of the belt at the end away from the rotating shaft. One end of the drive shaft passes through the housing and extends to the outside of the housing. A feed pipe is connected to the top of one side of the housing. During debugging, the residence time of the material in the nylon filter screen can be increased by adjusting the angle of the brush, thereby increasing the output. Furthermore, appropriately increasing the frequency of the inverter can improve the separation factor, increase the centrifugal force of the material, and increase the throughput of the nylon filter screen, thus further increasing the output. Adjusting the angle of the frame makes it easier to discharge the black spots.

The application discloses a liquor tailing acid substance extraction method in liquor brewing and liquor, and comprises the following steps of pretreatment, selective adsorption, gradient desorption, membrane separation and purification and liquor body blending. The chelation precipitation-microfiltration coupling process is adopted in the pretreatment to remove metal ions and colloidal impurities; the acid substances are specifically adsorbed through a hexanoic acid molecular imprinting polymer adsorbent, and step-by-step elution is realized by combining with gradient pH desorption; high-purity acid concentrated solution is obtained through nanofiltration membrane separation and activated carbon adsorption, and after screening, the high-purity acid concentrated solution is blended with a base liquor body to improve the quality of the liquor.

This invention discloses a method for separating vanadium and chromium in a vanadium-chromium solution, belonging to the field of wet separation of vanadium-chromium solutions. This method addresses the problem that existing technologies cannot achieve deep separation of vanadium and chromium. The method first adds a reducing agent to the vanadium-chromium solution, converting the highly soluble hexavalent chromate anion into a lower valence state, easily precipitated Cr. 3+ Cations, then add Mn 2+ The chromium removal agent efficiently precipitates trivalent chromium ions from vanadium-containing solutions, achieving deep separation of vanadium and chromium in the liquid phase. Compared with traditional chemical precipitation methods, the vanadium-chromium separation method of this invention has advantages such as high separation coefficient, simple and easy-to-use process, low equipment requirements, convenient operation, and suitability for industrial production.

The application discloses an extraction solvent and an extraction method for stepwise recovery of vanadium and chromium in a solution by steric hindrance effect of an amide extractant, wherein the extraction solvent is composed of extraction solvent A and extraction solvent B; the extraction solvent A is composed of a large steric hindrance amide extractant and diluent A; the extraction solvent B is composed of a small steric hindrance amide extractant and diluent B; the large steric hindrance amide extractant and the small steric hindrance amide extractant are both alkyl-substituted amide extractants; and the diluent A and the diluent B are both inert organic solvents. The steric hindrance effect of the amide extractant in the extraction solvent is utilized to stepwise recover vanadium and chromium in the solution, and high-purity chromium-containing stripping liquid and vanadium-containing stripping liquid are obtained, which has the advantages of high extraction rate, high separation coefficient, high product purity, fast extraction kinetics, good regeneration of the extraction solvent and green harmlessness.

This application belongs to the field of hydrometallurgical technology, specifically relating to an efficient method for recovering molybdenum during the sulfuric acid-enhanced decomposition of tungsten ore. The method includes the following steps: S1, obtaining tungsten ore, mixing it with concentrated sulfuric acid, and roasting it to obtain a roasting product. The roasting product, by mass percentage, includes: WO3: 10%-60%, Mo: 0.01%-5%; S2, mixing the roasting product with acidic washing liquid to obtain a first mixture. Under stirring conditions, a selective complexing agent is added to the first mixture to induce a complexation reaction, resulting in a second mixture. The second mixture is then subjected to solid-liquid separation to obtain a solid slag and a complexing liquid. The selective complexing agent includes at least one of thiourea and its derivatives or sulfur-containing organic compounds; S3, recovering molybdenum from the complexing liquid. This application, by introducing selective complexation during the washing stage, enriches the complexing liquid with over 98.5% of the molybdenum, while the residual rate of tungsten in the complexing liquid is ≤0.01%, thus solving the problem of molybdenum dispersion and loss in the slag phase and washing water.