10results about How to "Achieve selective separation" patented technology

The invention belongs to the field of mineral metallurgy, and particularly relates to a method for treating easily-argillization wrapped uranium-containing raw rubber sulfur-molybdenum ore, which comprises the following steps: carrying out coarse crushing and fine crushing on the easily-argillization wrapped uranium-containing raw rubber sulfur-molybdenum ore, then carrying out first-stage grading to obtain first-stage fine silt and a first-stage material, carrying out coarse grinding treatment on the first-stage material, and then carrying out second-stage grading to obtain second-stage fine silt; performing fine grinding treatment on the second-section material to obtain a fine grinding material; the first-stage fine silt, the second-stage fine silt and the fine grinding material obtained in the step (1) are placed in alkali liquor, pressurization and positive-pressure alkaline leaching treatment are conducted by adopting an oxygen-containing atmosphere, the alkali liquor is an aqueous solution of alkali metal element hydroxide, the pH value of the positive-pressure alkaline leaching stage is controlled to be 10 or above, then solid-liquid separation is conducted, and molybdenum-rich leaching liquor and uranium-rich leaching residues are obtained; and the uranium-rich leaching residues obtained in the step (2) are subjected to acid leaching treatment, and uranium-rich leaching liquid is obtained. According to the method, efficient extraction of molybdenum and uranium can be achieved, and in addition, high-selectivity separation of molybdenum and uranium can be synchronously achieved.

The utility model provides a production line for treating organic peroxide sewage, which relates to the field of sewage treatment and sequentially comprises an adjusting tank, a coagulative precipitation tank, a hydrolysis acidification tank, an A / O tank, an MBBR (moving bed biofilm reactor) tank, an MBR (membrane bioreactor) tank, a COD (chemical oxygen demand) separation device and an adsorption device. A water outlet of the regulating tank is communicated with a water inlet of the coagulative precipitation tank, and a water outlet of the coagulative precipitation tank is communicated with a water inlet of the hydrolysis acidification tank; a water outlet of the hydrolysis acidification pool is communicated with a water inlet of the anoxic pool, a water outlet of the anoxic pool is communicated with a water inlet of the aerobic pool, a water outlet of the aerobic pool is communicated with a water inlet of the MBBR pool, a water outlet of the MBBR pool is communicated with a water inlet of the MBR pool, a water outlet of the MBR pool is communicated with a water inlet of the water producing pool, and a water outlet of the water producing pool is communicated with a water inlet of the COD separation device through a water outlet pipe; a water outlet of the COD separation device is communicated with a water inlet of the adsorption device, and a concentrated water port is communicated with the ozone catalysis device. The device has the beneficial effect of effectively treating the organic peroxide sewage.

The invention belongs to the technical field of membrane separation, and relates to a preparation method of an efficient antibacterial microfiltration membrane for a biopharmaceutical process, a composite additive system is introduced into a membrane casting solution, a modifier is added, the modifier comprises a composite alcohol pore-foaming agent and an antibacterial agent, the membrane casting solution is coupled, and a high-throughput antibacterial membrane is obtained through cooperation of membrane preparation processes. The antibacterial agent can enhance the effect of the composite alcohol pore-foaming agent, assists in membrane pore size regulation and control and fixes the membrane structure, and through the synergistic effect of the composite alcohol pore-foaming agent and the antibacterial agent, the selective permeability is improved while the microfiltration membrane maintains high antibacterial performance, and selective separation of microorganisms of different sizes is achieved. The membrane is expected to be a potential candidate in a biopharmaceutical sterile filtration process.

The invention discloses an inorganic fluorine-containing anion functionalized microporous material, a preparation method thereof and application of the inorganic fluorine-containing anion functionalized microporous material in carbon dioxide adsorption and selective adsorption separation of olefin / alkane. The microporous material is a polymer formed by coordination of a metal ion M, an inorganic fluorine-containing anion A and an azole organic ligand L through a solvothermal reaction, and the solvothermal reaction adopts a rotary oven or a microwave reaction. The metal ion M is selected from at least one of Zn < 2 + >, Ni < 2 + > and Cu < 2 + >. The inorganic fluorine-containing anion A is selected from at least one of SiF6 < 2->, GeF6 < 2->, TiF6 < 2->, NbOF5 < 2->, SnF6 < 2-> and ZrF6 < 2->. The microporous material has a proper aperture size # imgabs0 # and rich fluorine-containing anions and nitrogen azole adsorption sites, and by taking the microporous material as an adsorbent, the selective adsorption separation of ethylene / ethane can be realized, alkane is preferentially adsorbed under a low-pressure condition, and a certain trapping capability on carbon dioxide is realized.

The invention discloses a GO composite membrane for high-selectivity separation of a low-molecular-weight cationic dye as well as a preparation method and application of the GO composite membrane. The composite membrane is constructed by coating a polymer ultrafiltration base membrane with polydopamine and alternately depositing composite graphene oxide and partially reduced graphene oxide. Wherein the composite graphene oxide is prepared by crosslinking crown ether amine and partially reduced graphene oxide. A cavity structure in the crown ether amine molecule can generate electrostatic interaction with the cationic dye, so that the selective interception of the composite membrane on the cationic dye is improved. The performance of the composite membrane can be optimized by controlling parameters such as a crown ether amine structure, the reduction degree of the graphene oxide, the loading proportion of the composite graphene oxide and the graphene oxide, and efficient separation of dyes with different molecular weights and charge types is realized. The GO composite membrane has high selectivity on low-molecular-weight cationic dyes, and is suitable for industrial printing and dyeing wastewater treatment, efficient dye separation and recovery and environmental pollution treatment.

The invention discloses a hexafluorosilicic acid anion functionalized microporous material as well as a preparation method and application thereof in adsorbing and separating olefin / alkane. The microporous material is a polymer formed by coordination of metal ions Zn < 2 + >, inorganic anions SiF6 < 2-> and an azole organic ligand L through a standing solvothermal reaction, and the microporous material with the separation property can only be synthesized by a standing solvothermal reaction method. The microporous material has high-density anions and nitrogen azole sites, and the structural properties of the material can be regulated and controlled by regulating the types of solvents for reaction, the feeding proportion of the anions to nitrogen azole organic ligands, the types of the nitrogen azole organic ligands and the like. The microporous material obtained by the invention can realize olefin / alkane separation based on size and electronic effect.

The application provides a method for selectively recovering metal elements in waste batteries by using a functional deep eutectic solvent, which comprises the following steps: mixing choline chloride, phosphoric acid and a choline hydroxide solution to obtain a deep eutectic solvent DES; pretreating a positive electrode of a waste lithium iron phosphate (LFP) battery and a waste lithium cobalt oxide (LCO) battery; and immersing the positive electrode in the deep eutectic solvent DES to make Li + enriched into the leaching solution, Fe is converted into FePO4 and left in the residue, and then cobalt is recovered by "ethanol-induced precipitation", lithium is recovered by "pH-controlled precipitation", and the DES is regenerated. 2+ This method realizes the closed loop of lithium iron phosphate and lithium cobalt oxide battery recycling in a green and economic way through the strategies of segmented targeted leaching and selective coordination precipitation, combined with solvent regeneration.

The application discloses a method for recovering propylene glycol methyl ether and propylene glycol methyl ether acetate from waste diluent, belongs to the field of diluent recovery, and aims at the technical problems that the recovery purity, recovery rate and long-period operation stability of PM and PGMEA in waste diluent need to be further improved, and specifically comprises the following steps: after pretreatment, the waste diluent is transported to a fixed complex separation bed filled with non-halogen hydrogen bond acceptor complex materials, so that propylene glycol methyl ether and water are complexed with the non-halogen hydrogen bond acceptor complex materials and are retained, the non-halogen hydrogen bond acceptor complex materials are constructed, propylene glycol methyl ether acetate is preferentially flowed out, and three-stage vacuum pyrolysis complexing is performed to realize segmented release and material regeneration, so that the high-purity recovery of propylene glycol methyl ether or propylene glycol methyl ether acetate is ensured, and the high recovery rate and long-period operation stability are maintained.

The invention relates to the field of photo-thermal composite materials and water purification, in particular to a convenient friction construction method of a self-floating photo-thermal interface evaporator device for desalting brackish water. The fluorine-free super-hydrophobic gel polymer composite material is synthesized by doping a carbon-based photo-thermal material, nano-scale biomass powder and high-grade alkyl alcohol into the fluorine-free super-hydrophobic gel polymer composite material by virtue of room-temperature soaking modification in which long-chain alkylamine participates, a hydrophilic material with a coarse structure on the surface is used as a base material, and simple and convenient reciprocating friction is performed on the surface of the hydrophilic material, so that the super-hydrophobic gel polymer composite material is obtained. Therefore, the self-floating photo-thermal interface evaporator device with asymmetric wetting can be quickly constructed. The problems that an existing photo-thermal composite material and a photo-thermal interface evaporator device are complex in preparation process, high in energy consumption and high in cost, and expensive large professional equipment is needed are solved.

The application belongs to the technical field of haematococcus pluvialis separation, and specifically discloses a ternary cross-linked nanofiltration membrane, a preparation method and application. The nanofiltration membrane comprises a polyethersulfone ultrafiltration membrane base film, a polydopamine intermediate layer and a ternary cross-linked functional layer sequentially loaded on the surface of the polyethersulfone ultrafiltration membrane base film. The preparation method comprises the following steps: preparing the polydopamine intermediate layer, anchoring oxidized haematococcus pluvialis polysaccharide, covalently cross-linking polyphenylated chitosan, coordination cross-linking iron ions, and post-treatment to obtain the ternary cross-linked nanofiltration membrane. The ternary cross-linked nanofiltration membrane is used for separating haematococcus pluvialis polysaccharide and astaxanthin ester. The ternary cross-linked functional layer simultaneously has three separation abilities of size screening, charge regulation and coordination selection, realizes selective separation of astaxanthin ester and neutral oil with similar molecular weights, and effectively retains macromolecular polysaccharide.