43results about How to "Effective enrichment and separation" patented technology

The invention belongs to a non-ferrous metal metallurgy industry and particularly relates to a method for enriching and recycling cadmium from a lead smelting system. The method comprises the following steps: matching a lead concentrate with auxiliary materials and returned low-cadmium smoke and dust, and adding desulfurization smelting lea of a bottom blowing furnace; circularly enriching the cadmium in electric dust-collection smoke and dust in a form of cadmium sulfate; when the cadmium content of the electric dust-collection smoke and dust is 5%-28%, leaching by using water or dilute sulfuric acid to separate the cadmium; displacing a leaching solution by using zinc powder to produce cadmium sponge and further producing rough cadmium and fine cadmium; and taking a solution obtained by displacing the cadmium as a raw material for producing nano zinc oxide, zinc sulfate monohydrate and zinc sulfate heptahydrate to recycle zinc. The lead is enriched in leached dreg in a leaching process so that the lead can be conveniently returned back to a lead system to be smelted and recycled. According to the method, a bottom blowing smelting technology is adopted; when the lead is smelted, the cadmium in the raw material is efficiently enriched and converted into a water-soluble cadmium salt; a technological process is shortened and conditions for directly enriching, separating and recycling the lead and the cadmium are provided; the dispersion of the lead when the cadmium is recycled by a wet method is avoided and the production cost is reduced.

The invention discloses a magnetic covalent organic framework material, and a preparation method and application thereof in detection of perfluorinated compounds. The preparation method comprises thesteps: taking 1,3,5-tri(4-aminophenyl)benzene, terephthalaldehyde and a terephthalaldehyde intermediate as raw materials, and performing covalent linkage on the surfaces of ferroferric oxide nanoparticles under the catalytic action of acetic acid to obtain a covalent organic framework material precursor layer containing azido; reducing the azido of the covalent organic framework material precursorlayer into a primary amine group to generate a magnetic covalent organic framework material containing the primary amine group, wherein the terephthalaldehyde intermediate is terephthalaldehyde of which a benzene ring is connected with the azido through a chemical bond. The magnetic covalent organic framework material provided by the invention can be quickly synthesized at room temperature, and efficient separation and enrichment of PFCs are realized in a magnetic solid-phase extraction manner.

The invention relates to a pyrometallurgy process for copper, lead and zinc mixed concentrate, comprising the steps that: 1) lead separation, sulfur fixing and melting are carried out; a sulfur-fixed agent is added for burdening; furnace burden after burdening is put into a melting furnace; a melting reaction is carried out at a temperature of 1000 to 1100 DEG C, and crude lead and slag sulfur are obtained; the crude lead is separated; 2) the slag sulfur is separated and melted; rest slag sulfur is separated and melted in reduction atmosphere in a blast furnace and in the condition of high-calcium slag type; zinc in the slag is reduced to be metal zinc which enters into fume when being volatilized, and is recycled by a dust precipitator in a state of zinc oxide; the temperature of the focal area of the blast furnace is increased so as to cause the slag sulfur to be separated and fully react; the crude lead, copper mattes and the slag are fully separated. The process solves the technical problem that current pyrometallurgy process of the background technology can not meet the melting of copper, lead and zinc mixed concentrate with a copper content higher than 2 percent. The process is characterized by advanced process procedure, being environmentally friendly and having high resource recycling rate.

The invention discloses a method for enriching and recovering thallium from a lead smelting system. The method comprises the following steps of: collecting thallium-cadmium soot from a lead concentrate smelting system; leaching the obtained thallium-cadmium soot in water or dilute sulfuric acid, and collecting a leaching solution; carrying out primary replacement and secondary replacement on the collected leaching solution by using a metal monomer; carrying out standing oxidation on thallium-containing sponge cadmium obtained after secondary replacement, leaching by using a sodium carbonate solution after oxidation, and obtaining a thallium-rich leaching solution after leaching; and adjusting the pH value of the obtained thallium-rich leaching solution, and then carrying out replacement toobtain sponge thallium, thereby completing the enrichment of thallium. According to the method for enriching and recovering thallium from the lead smelting system, thallium in the lead concentrate smelting system is well enriched and recovered by using a simple and easy-to-operate method, no toxic or harmful reagent is used in the whole treatment process, the used reagent is non-toxic and low incost, the materials in the whole treatment process are well recycled and recovered, no waste is generated, and the production cost is further reduced. Moreover, thallium is well enriched and recovered. The method has outstanding social and economic benefits.

The invention relates to a phosphate zirconium nano magnetic particle with the structural representation on the right, and the preparation and application thereof; the preparation method comprises the steps that phosphate groups are induced to the surface of the nano magnetic particle which is wrapped with silicon dioxide on the surface and takes ferriferrous oxide as a magnetic inner core; then, a phosphate zirconium layer is formed on the surface by the mutual action between zirconium ions and the phosphate groups on the surface, thereby successively preparing a nano magnetic particle having high efficiency, high-selectivity separation and enrichment feature to peptide phosphate. The nano magnetic particle is mainly used for separating the enriched peptide phosphate from biological samples, with high efficiency and under the action of a magnetic field. The extracted peptide phosphate can be directly analyzed and represented by mass spectrum.

The invention provides a humic acid esterificaton and etherification modification based adsorption material and belongs to the technical field of environmental adsorption materials. The adsorption material is characterized in that esterified humic acid is prepared from humid acid, glycerinum and organic acid under the action of an acid catalyst, and the esterified and etherized humid acid adsorption material is prepared under the action of reduced ether. The invention further relates to the preparation method of the adsorption material. The adsorption rate of the etherified humic acid ester adsorption material on 2, 4, 6-trichlorophenol can reach more than 91%; meanwhile, the etherized humic acid ester adsorption material has preferential adsorption and good hydrophobic performance on organic chloride pollutants in media of water, soil and the like, the adsorption material can be separated from the soil and water by the aid of the hydrophobic property after the organic chloride pollutants are adsorbed, efficient separation and enrichment of the organic chloride pollutants and soil and high-efficiency recovery and the humic acid modified material are realized, and pollution to environment is lowered.

The invention discloses a preparation method of boric acid functional group resin, belongs to the field of resin, and aims to solve the technical problems of poor adsorption material selectivity, lowadsorption capacity, high price, lack of accurate regulation and control in the material modification process and difficulty in efficient introduction of specific boric acid functional groups in the existing extraction and separation process of polyhydric alcohols, polyhydric phenols, saccharides and other high-added-value derivatives. The method comprises the following steps: selecting an anilineboric acid monomer with higher reaction activity and aniline and benzylamine boronic acid pinacol ester monomers, and loading the monomers on a polystyrene resin skeleton through an efficient and mild nucleophilic substitution reaction or loading the monomers on a polyacrylic resin skeleton through a condensation reaction to prepare the boric acid functional group resin with high functional grouploading capacity and high selectivity. The method overcomes the defects of low boric acid functional group loading rate, poor stability, poor recyclability and the like of the existing material, canefficiently and mildly load the boric acid function based on the resin carrier, and can effectively enrich and separate the polyhydroxy compound with the cis-vicinal diol or m-diol structure.

The invention provides a shunting extraction process for separating a lithium isotope. The shunting extraction process mainly comprises an extraction enrichment section, a shunting enrichment section,an up-conversion phase section and a down-conversion phase section, wherein a liquid phase B in the extraction enrichment section is partially shunted into the shunting enrichment section, and contacts with the countercurrent of a liquid phase A in the shunting enrichment section; the liquid phase A enters the extraction enrichment section after flowing out. By adopting the special shunting return process, the yield of a final enrichment product is not lowered, and the size of most equipment in the extraction enrichment section is reduced, thereby effectively lowering the corresponding equipment cost and operating cost. The process provided by the invention also has the advantages of simple process, convenience in operation, environmental friendliness and the like, and efficient separation and enrichment of the lithium isotope can be realized.

The invention provides a process for extracting and separating lithium isotopes by crown ether. Specifically, a crown ether extraction agent is taken as an organic phase, an organic phase and a waterphase are operated continuously and adversely, the lithium isotopes are extracted and separated on extraction and separation sections C1 and C2, and mass transfer and phase inversion of lithium elements are achieved by upper and lower phase inversion sections. Buffering sections H1 and H2 are adopted, so that abundance of lithium-6 enriched products P1 and lithium-7 enriched products P2 can be adjusted conveniently, and the lithium-6 enriched products and the lithium-7 enriched products can be obtained at the same time. The process has the advantages of high separation coefficient of an extraction system, concise procedure, convenience in operation, capability of buffering and controlling flow fluctuation effectively, and high efficiency in separation and enrichment of the lithium isotopes.

The invention discloses a comprehensive recovery process for difficult-to-separate copper-lead-zinc mixed concentrate, and belongs to the technical field of metal recovery and utilization. The processcomprises the following steps: (1) finely grinding the mixed concentrate until the concentrate with 200 meshes accounts for more than 95%; (2) adding water and sulfuric acid into the mixed concentrate after fine grinding to carry out slurry mixing, so that the slurry concentration after slurry mixing is 30 wt%, and the pH value is 1-3; (3) performing solid-liquid separation to obtain a copper sulfate solution and copper leaching slag, and performing extraction and electrodeposition on the copper sulfate solution to produce national standard 1# electrodeposition copper; (4) performing slurry mixing on the copper leaching slag to perform ammonia conversion on lead sulfide in the copper leaching slag, and performing solid-liquid separation to obtain conversion liquid and conversion slag; (5)performing fluosilicic acid solution leaching on the conversion slag, performing solid-liquid separation to obtain lead leaching liquid and lead leaching slag, purifying the lead leaching liquid, andelectrodepositing lead to produce national standard 1# electrodeposition lead; and (6) performing superfine grinding on the lead leaching slag until the slag with 400 meshes accounts for more than 95%, and adopting one-stage roughing, two-stage scavenging and two-stage concentration to obtain copper concentrate, wherein tailings are zinc concentrate.

The invention provides a uranium adsorbent and a preparation method and application thereof, and belongs to the technical field of polymer modification. The invention provides a uranium adsorbent preparation method, which comprises: mixing an inorganic alkaline solution and jute fibers, and carrying out pretreatment to obtain a pretreated jute fiber matrix material; in an inert atmosphere, mixing the pretreated jute fiber base material, an acyl chloride derivative and an organic solvent, and carrying out chloroacetylation to obtain chloroacetylated jute fibers; in an inert atmosphere, mixing hydroxylamine hydrochloride, inorganic alkali and an organic solvent, heating, mixing with polyacrylonitrile, and performing oximation to obtain oximated polyacrylonitrile; and mixing the chloracetylated jute fibers, oximated polyacrylonitrile and an organic solvent, and carrying out a grafting reaction to obtain the uranium adsorbent. The uranium adsorbent prepared by the invention has high strength and also has excellent uranium adsorption performance.

The invention provides a technology for separating lithium isotope through liquid-liquid extraction. Specifically, the technology comprises the steps: continuously performing countercurrent operationon an organic phase and a water phase; making a lithium-containing organic phase passing through a lithium saponification section sequentially pass through an extraction separation C1 section, an extraction separation C2 section and a phase inversion section; making a lithium-containing water phase passing through the phase inversion section sequentially pass through a buffer H2 section, an extraction separation C2 section, an extraction separation C1 section and a buffer H1 section. By means of the buffer H1 section and the buffer H2 section, abundances of a lithium-6 enrichment product P1 and a lithium-7 enrichment product P2 can be conveniently regulated, and two enrichment products to which lithium-6 and lithium-7 are enriched can be obtained simultaneously. The technology disclosed bythe invention has a reasonable concise process design and convenient in operation, can effectively buffer and control flow fluctuation and achieves high-efficiency separation and enrichment of the lithium isotope.

The invention relates to a method for enriching and separating phenolic compounds in shale oil. The core of the method is a separation method combining solvent refining and column chromatography. The method comprises the following steps: mixing an extracting agent with whole fractions of the shale oil at a ratio, and carrying out the solvent refining; after refining, obtaining extracted oil for primarily enriching the phenolic compounds; cutting fractions of the extracted oil with the temperature, smaller than or equal to 280 DEG C, as raw materials for deeply enriching the phenolic compounds; and furthermore, concentrating and separating through the column chromatography, removing a solvent and drying in vacuum to obtain the phenolic compounds.

The invention relates to a preparation method and applications of an active matter capable of efficiently removing chloasma. The preparation method and applications are characterized in that the preparation method includes the following steps: A, drying fresh folium artemisiae argyi to add into a round-bottom flask with deionized water, adjusting pH to 2.0-3.0 with concentrated hydrochloric acid,performing heating extraction through a water bath, receiving folium artemisiae argyi essential oil with a taper flask at the liquid outlet of a condensing tube, performing water bath extraction on the first filtered residue under the environment where the pH is 6.5-7.0, and performing water bath extraction on the second filtered residue under the environment where the pH is 8.2-8.6; B, pooling the first filtrate, the second filtrate and the third filtrate after filtration so as to obtain a folium artemisiae argyi extracting solution; C, performing reduced pressure distillation and concentration on the folium artemisiae argyi extracting solution to obtain folium artemisiae argyi extract, taking a proper amount of the extract to add into an ethanol/ammonium sulfate aqueous two-phase system,adjusting the pH to 3-4 with the concentrated hydrochloric acid, performing full shaking, then allowing the solution to stand, collecting an ethanol phase at the upper layer, and obtaining folium artemisiae argyi flavonoids through vacuum concentration; and D, mixing the folium artemisiae argyi essential oil and the folium artemisiae argyi flavonoids so as to obtain the active matter capable of efficiently removing chloasma. The obtained active matter has good effects on improving the chloasma.

The invention discloses a method for enriching and separating noble metal in aluminum-containing noble metal liquid by a two-step method, which belongs to the field of petrochemical. Two steps of ion exchange and substitution are organically combined together, so that most of the noble metal in the liquid is separated and enriched onto anion selective resin through the ion exchange, while a small quantity of noble metal ions which are not enriched are enriched through the substitution for recycling. The method of the invention is short in production period and high in production efficiency; and the noble metal in solution obtained by the substitution is further substituted by aluminum metal. The method of the invention has the advantages of overcoming the defects of low production efficiency and low recovery rate of a single enriching method and really realizing the integration of simplicity and high efficiency.

The invention relates to a method for synchronously detecting six kinds of aflatoxins based on a graphene nanotechnology. The method comprises the following steps that: a sample solution is made to contact with a graphene coating, so that the graphene coating adsorbs aflatoxins in the sample solution; and the aflatoxins adsorbed and combined to the graphene coating are desorbed, so that the aflatoxins are released and detected. According to the method for synchronously detecting six kinds of aflatoxins, on the basis of weak pi-pi interaction formed between rich large pi bonds of the graphene nano material and the aflatoxins with aromatic ring large pi bond structures, and the characteristics of the super-large specific surface area and the like of the graphene nano material, the adsorptionand combination of the six kinds of aflatoxin in the sample liquid by the graphene coating are realized; the graphene has good chemical inertness and thermal stability, so that compared with a coating formed by other substances, the graphene does not release substances of the coating in an analysis process which are mixed with the aflatoxins, and therefore, the detection accuracy of the aflatoxins is improved.

The invention relates to an ultrasonic extraction, purification and extraction method of ginkgol, and belongs to the technical field of natural plant active ingredient extraction. The method comprisesthe following steps: carrying out strong ultrasonic fragmentation on fresh gingko kernels, mixing with water, filtering, carrying out solvent extraction, and finally heating to a ginkgol gasificationtemperature to obtain an oily substance, namely the ginkgol. The method for independently extracting the ginkgol is provided for the first time, the method is simple in process, low in cost and goodin effect, the required component ginkgol can be effectively enriched and separated, and the quality and content of the ginkgol extract are improved.