48results about How to "Realize separation and enrichment" patented technology

The invention discloses a method for separating arsenic and selenium from copper anode slime alkaline leach liquor. The method comprises the following steps: 1) oxidation, namely adding an oxidizing agent or introducing oxidizing gas into the copper anode slime alkaline leach liquor, so that oxidized copper anode slime alkaline leach liquor is obtained; 2) arsenic precipitation, namely adding a calcium salt into the oxidized copper anode slime alkaline leach liquor, stirring the obtained mixture so as to produce a precipitate, and carrying out filtration and separation on the precipitate so as to obtain a calcium arsenate precipitate and arsenic post-precipitation liquid; and 3) selenium precipitation, namely adding a barium salt into the arsenic post-precipitation liquid obtained in the step 2), stirring the obtained mixture so as to produce a precipitate, carrying out filtration and separation on the precipitate so as to obtain a barium selenate precipitate and selenium post-precipitation liquid, and carrying out evaporative crystallization on the selenium post-precipitation liquid so as to recycle alkali, or directly returning to a leaching process. The method disclosed by the invention is short in technological process, less in equipment and simple in operation, and can be used for realizing the separation and enrichment of arsenic and selenium, the precipitation rate of arsenic is higher than 96%, and the precipitation rate of selenium is higher than 99%; by virtue of carrying out evaporative crystallization on a solution for recycling or directly returning the solution to a leaching process, the recovery of alkali is realized.

The invention belongs to the field of ship tail gas treatment, energy conservation and environment protection, and particularly relates to a ship tail gas denitration technology and system and a desulfurization and denitration integrated technology and system. When low sulfur oil is used for a ship, the ship tail gas denitration technology and system can achieve high denitration efficiency and reduce energy consumption; when high sulfur content is used for the ship, desulfurization and denitration are combined together, high desulfurization and denitration efficiency is achieved, meanwhile, the cost is greatly saved, and the tail gas exhaust standards are met. The ship tail gas denitration technology comprises the steps of 1, tail gas cooling, 2, NOX adsorption, 3, desorption of NOX adsorbed on an adsorbent, 4, low-temperature plasma decomposition and 5, absorption and reduction. The ship tail desulfurization and denitration integrated technology comprises the steps of 1, tail gas cooling, 2, washing performed through washing water, 3, soda absorption, 4, NOX adsorption, 5, desorption of adsorption water adsorbed on an adsorbent, 6, desorption of NOX adsorbed on an adsorbent, 7, low-temperature plasma decomposition and 8, absorption and reduction.

The invention relates to a preparation method of a magnetic microspheres-based levofloxacin surface imprinted material. The preparation process mainly comprises three steps: preparation of magnetic microspheres; coating of the magnetic microspheres with a molecularly imprinted material; and elution of template molecules. A synthetic method provided by the invention is simple. The prepared magnetic microspheres-based surface molecularly imprinted material has specific recognition function, high adsorption capacity and rapid adsorption ability of levofloxacin and has chiral resolution function of ofloxacin, has good magnetic response and high mechanical strength, can be used as an absorption filler or a coating material, also can be used in preparation of a molecular imprinting sensor and a chip, and is of great significance for researches on specific recognition, chiral resolution and highly sensitive detection of floxacin drugs.

The invention discloses a tumor-targeted delivery carrier based on cell-derived micro-vacuoles, a preparation method and an application. The preparation method comprises the following steps of: (A) preparing a conditioned medium: supplementing fetal bovine serum, antibiotics, DSPE-PEG-Biotin and DSPE-PEG-Folate into a basal medium; (B) using the obtained conditioned medium in cell culture, and collecting cell culture supernatant for subsequent separation; (C) carrying out low-speed centrifugation on the obtained culture supernatant to remove cell debris and apoptotic bodies, then adding SA-IONPs, mixing uniformly, incubating, then separating by a magnet, using PBS for re-suspension, eluting for multiple times to obtain the cell-derived micro-vacuoles with membrane surfaces modified by folic acid and iron oxide nano-particles, and freezing for storage; and (D) loading chemotherapeutic drugs or therapeutic genes into the functionalized micro-vacuoles doubly-modified by an electroporation mode, and carrying out re-suspension after separation with the magnet. The tumor-targeted delivery carrier based on cell-derived micro-vacuoles, the preparation method and the application disclosed by the invention are applicable to specific targeting delivery of multiple chemotherapeutic drugs and therapeutic genes, and have the advantages of enhancing the anti-tumor effect, reducing the systemic toxicity and improving the clinical effect of the current therapeutic selection, so that a new hope is brought for clinical therapy of tumors.

The invention discloses a molecular sieve modification method capable of increasing a separation factor of CH4 and N2, belonging to the technical field of molecular sieve. The molecular sieve modification method comprises the following steps of: impregnating a Na-beta molecular sieve in H2SO4, H3BO3 and NH4NO3 aqueous solution with a certain concentration, filtering, drying and burning to obtain an acid-modified A/H-Na-beta molecular sieve. Compared with the Na-beta molecular sieve, the A/H-Na-beta molecular sieve provided by the invention has excellent adsorption selectivity to CH4 gas and prominent separation effect on CH4 and N2, wherein the NH4NO3-modified beta molecular sieve has the strongest adsorption capability to CH4 gas. The modified molecular sieve can simultaneously improve the adsorption capability to CH4 gas and reduce the adsorption capacity to N2, thus increasing the separation factor of CH4 and N2 and achieving the separation and enrichment of CH4 and N2.

The invention discloses a method for analyzing and detecting alkaline aroma constituents in tobacco through an ultrasound-assisted cloud-point extraction gas chromatography-mass spectrometry technology. The method includes the steps that 1, a tobacco powder sample is accurately weighed, a sodium hydroxide solution and an internal standard solution are added, soaking and ultrasonic extraction are performed, centrifugation is performed to obtain supernate, a surfactant is added, the mixture is evenly stirred to form a 5%-15% solution, the 5%-15% solution is heated to a temperature higher than the cloud point temperature, and an aqueous phase is removed after standing layering or centrifugal layering; 2, reextraction solvent is added, ultrasonic extraction is performed, a reextraction solvent phase on the upper layer is taken, anhydrous sodium sulfate is added, the mixture is oscillated and then subjected to standing concentration, and the product is filtered through a filtration membrane to obtain a sample to be detected; 3, the sample is detected through a GC-MS, and graph spectrum data are processed to obtain an analysis and test result of the alkaline aroma constituents. The method has the advantages that the pretreatment process is simple, mild and fast, the alkaline aroma constituents in the tobacco can be accurately determined, and the method has great theoretical significance and application value for guiding a scientific formula of cigarettes and improving the aroma and taste quality of the cigarettes.

The invention discloses a marine exhaust gas after-treatment method. Exhaust gas generated by ships is introduced into a desulfurization and denitrification unified tower, absorbing desulfurization is conducted on the lower portion of the tower by means of sodium hydroxide solution, complexing denitrification can be achieved with complexing liquid on the upper portion of the tower, and exhaust gas up to standard after desulfurization and denitrification treatment is heated and then discharged out of a chimney; the complexing liquid after NO complexing is heated so that NO can be extracted; No extracted through heating is oxidized to be NO2 through catalytic oxidation or plasma oxidization, and then absorbed by sodium hydroxide solution or sodium sulfite solution. When ship usage meets the requirement for low-sulfur oil according to IMO convention, desulfurization is not needed, sodium alkali desulfurization section spraying liquid is changed to be seawater, and exhaust gas is cooled to prevent the temperature of a tower body from becoming too high. When ships sail in an area which does not need denitrification, a denitrification section complexing liquid sprinkling system is closed, and exhaust gas is heated and then directly discharged out of the chimney. In this way, separation and enrichment of NOX from exhaust gas is achieved, the concentration of NOx is improved, and the conversion rate of catalytic oxidation and plasma oxidization is increased.

The invention relates to a method for separating and enriching chlorogenic acid in tobacco. According to the method, the chlorogenic acid in tobacco is separated and enriched by utilizing a solvent flotation technology, and a mixed organic solvent is added to serve as an extracting agent, so that the polarity of the extracting agent is changed, and the extraction rate of the chlorogenic acid is improved. The pH value of a tobacco extracting solution is regulated, so that the polarity of the extracting agent is matched with that of the chlorogenic acid, and the separation, enrichment and purification effect is good. The extraction can be performed at room temperature due to the adopted solvent flotation technology, and the operation conditions are mild. According to floatation of an air floatation solvent, an emulsification phenomenon generated due to shaking during common liquid-liquid extraction is avoided, the amount of the used organic solvent is small, and the method is large in enrichment factor, short in phase separation time, low in cost and feasible to operate.

The invention relates to a method for industrial waste residue resource disposal, in particular to a process for enriching and recovering chromium in the chromium residue by a chlorination segregation method. The concrete method comprises the following steps: the pulverized coal and chromium residue are respectively ground to 80 meshes, evenly mixed and then added with 10 percent of calcium chloride aqueous solution and 3 percent of polyvinyl alcohol aqueous solution to be sufficiently and evenly mixed, and then the mixed solution is molded by extrusion; then the mixed solution is transferred to a roasting furnace to be roasted for 80 minutes at the temperature of 980 DEG C, the gas discharged at the top of the roasting furnace is absorbed through water circulation to obtain chromium trichloride solution; the chromium trichloride solution can be used for producing chromium trichloride or other chromium salts; the overall content of chromium in the chromium residue discharged from the roasting furnace is lower than 5 ppm (the content of hexavalent chromium is lower than 1 ppm), and the chromium can be used as building material; the separation and the concentration of chromium are realized through the method, the chromium recovery ratio is up to 94 percent, the chromium residue is recycled, and the problem of secondary pollution existing in the chromium residue is solved. The method is simple in process, requires low equipment investment, is suitable for volume production and convenient for industrialization; and the method is an environment-friendly process which has better popularization and application prospect.

The invention discloses a method for flotation of uranium minerals from volcanic rock type uranium ores. The method comprises the following steps: crushing volcanic rock type uranium ores, adding an acid, performing ore grinding, and carrying out size mixing treatment to obtain ore pulp; and adjusting the ore pulp through sodium carbonate, and by taking sodium silicate and sodium hexametaphosphateas inhibitors, hydroxamic acid compounds and fatty acid compounds as collecting agents and P507 as an auxiliary collecting agent, performing froth flotation under the action of a foaming agent to obtain uranium concentrate. According to the method, sodium silicate and sodium hexametaphosphate are used as the inhibitors, and hydroxamic acid and fatty acid collecting agents and the P507 auxiliary collecting agent are used in cooperation, so that the yield of the flotation concentrate is greatly reduced, the content of carbonate minerals in the flotation concentrate is reduced, and reagent consumption and hydrometallurgy ore treatment capacity in the subsequent leaching process can be reduced; and meanwhile, separation and enrichment of uranium minerals are achieved, the flotation concentrate yield is 19.06%, the uranium grade is 1.073%, and the recovery rate is 86.63%.

The invention discloses a technology for preparing zinc sulfate from high-chloride zinc slag and coproducing ammonium chloride. The technology comprises the following steps: (1) leaching chlorine fromthe high-chloride zinc slag through water washing-ammoniating two sections; (2) performing acid leaching on zinc in an ammonium leached residue by using oxidized sulfuric acid; (3) purifying chlorine-containing liquid; (4) preparing the ammonium chloride; (5) purifying zinc leached liquid. By a water washing-ammonium leaching and acid leaching step-by-step separation technology, the technical bottleneck problems during application of the conventional wet-process zinc smelting technology for recycling the zinc from the high-chloride zinc slag and discarding a chlorine resource are solved, so that the technology for recycling the zinc and chlorine from the high-chloride zinc slag is provided, and thus an environment-friendly technology for recycling the zinc and the chlorine at low cost, producing ammonium chloride and zinc sulfate products and ensuring zero discharge of three wastes is achieved; meanwhile, valuable metals lead, cadmium, copper and the like in the high-chloride zinc slag are enriched and recycled.

The invention discloses a phenyl bridge bond type fibrous porous silicon material, and discloses a preparation method of the material and application of the material in the field of sulfonamide antibiotic analysis. The material is prepared by adopting a special microemulsion system, adopting a cationic surfactant as a structure directing agent, and adopting phenyl bridge bonded silane and an inorganic silicon source as a mixed silicon source precursor. The material prepared by the method is applied in enrichment of sulfonamide antibiotics in a sample in a solid phase extraction and enrichmentprocess, and the content of the sulfonamide antibiotics can be determined by liquid chromatography tandem mass spectrometry. The material has the advantages of a three-dimensional central radial fiberpleated porous structure, high specific surface area, high internal surface accessibility, and the like, and can effectively enrich and purify sulfonamide antibiotics in complex samples. The method has advantages of environmental friendliness, simple operation, high detection sensitivity, good reproducibility, and the like and has a huge application potential.

The invention belongs to the technical field of preparation of molecular identification selective separation materials, and relates to a method for preparing a high-density boric acid site polymer adsorbent based on a supramolecular interface assembly strategy. According to the invention, the high-density boric acid site polymer adsorbent is prepared by means of initiated atom transfer radical polymerization (ATRP) and a supramolecular action; and the prepared adsorbent is used for selective adsorption and separation of albumin in a neutral solution. The high-density boric acid site polymer adsorbent prepared by the invention has higher glycoprotein selective adsorption performance, larger adsorption capacity and good acid-base response performance, and has fast adsorption and desorption properties for glycoprotein albumin.

The invention discloses a combined treatment method for a nickel-iron alloy material and a nickel-containing raw material. The method comprises the following steps of putting the nickel-iron alloy material into an anode basket of an electrolytic bath for electrochemical dissolution, dissolving nickel and iron in an electrolyte in an ion form after electron loss, mixing the electrolyte containing nickel and iron after electrolysis with the nickel-containing raw material to prepare pulp, transferring the mixed ore pulp into a high-pressure kettle, introducing oxygen to carry out pressurized reaction, carrying out solid-liquid separation on the slurry subjected to the pressurized reaction to obtain a nickel-rich solution and iron-rich slag, further purifying the nickel-containing solution to recover nickel, and recovering iron from the iron-rich slag. According to the method, the characteristic that the content of iron and residual acid in the nickel-iron alloy electrolyte is high is fully utilized, the nickel-containing raw material is leached through the residual acid in the electrolyte and the acid released by iron ion high-pressure hydrolysis precipitation, effective utilization of the acid is achieved, the two materials are treated at the same time, separation and enrichment of nickel and iron are achieved, and the effect that multiple purposes are achieved at one stroke is achieved.

The invention provides a comprehensive utilization method of columbite. The comprehensive utilization method of the columbiobite comprises the following steps of S1, carrying out reduction side-blown smelting on the columbiobite in a side-blown furnace to obtain molten iron, furnace slag and phosphorus-containing flue gas; and S2, carrying out deep reduction on the furnace slag in an electric furnace, and obtaining ferroniobium, slag rich in rare earth and electric furnace flue gas. According to the comprehensive utilization method of the columbite provided by the invention, firstly, the columbite is subjected to reduction side-blown smelting to achieve separation of phosphorus and iron, and the phosphorus content in the obtained molten iron and the furnace slag is low, so that the problem caused by the high phosphorus content in raw materials in the subsequent niobium and rare earth extraction process is solved; and reduction side-blown smelting and deep reduction are both low-cost smelting modes, so that the recovery cost of metal in the columbite is effectively controlled. Meanwhile, waste heat of the side-blown furnace can be recycled, the produced electric energy can be used for deep reduction in a subsequent electric furnace, and dependence on external electric energy resources is reduced. In the deep reduction stage, an iron-containing material is added to serve as an additional iron source to achieve deep reduction, and niobium molten iron is formed.

The invention discloses polydopa/polyethyleneimine copolymer modified magnetic particles and a preparation method and application thereof. The preparation method of the polydopa/polyethyleneimine copolymer modified magnetic particles includes the following steps that COOH-MNPs is added into an alkaline solution of dopa, then polyethyleneimine, CuSO4 and H2O2 are added to serve as inducers, the material is heated to 25-50 DEG C to be stirred for 0.5-2.0 h, and polyDOPA/PEI-MNPs is obtained after separation. The polyDOPA/PEI-MNPs has mild preparation conditions, the operation is easy and convenient, the reproducibility and the stability are good, and separation and enrichment of catecholamine in diluted body fluid (especially blood) can be achieved.