45results about How to "Highly selective separation" patented technology

The invention discloses a layered fluorine-containing metal-organic framework material for adsorbing and separating acetylene ethylene, the structural general formula is ML2A, M is a metal ion, L is abroken line type organic ligand, A is an inorganic fluorine-containing anion, and the metal ion M is at least one of Cu<2+>, Fe<2+>, Co<2+>, Ni<2+> and Zn<2+>, wherein the broken line type organic ligand L is at least one of 4, 4'-dipyridylsulfoxide and 4, 4'-dipyridylsulfone, and the inorganic fluorine-containing anion A is at least one of SiF6<2->, GeF6<2->, ZrF6<2->, SnF6<2->, TiF6<2->, NbOF52<->, WO2F4<2-> and MoO2F4<2->. The layered fluorine-containing metal-organic framework material can be prepared by adopting an interface diffusion method, a solvothermal method or a room-temperature stirring method. The layered fluorine-containing metal-organic framework material is used as an adsorbent and is in contact adsorption with a gas mixture containing acetylene and ethylene, and efficient separation of acetylene/ethylene can be realized at normal temperature, low acetylene content and low acetylene partial pressure.

The invention discloses a method for efficiently separating lignin from agricultural waste by using a composite ionic liquid system. The method comprises the following steps: (1) preparation of composite ionic liquid: subjecting composite ionic liquid with cooperative effect to mechanical mixing or double-anion ion exchange; (2) pretreatment of agricultural waste: fully drying the agricultural waste, then crushing the agricultural waste to a size of 20 to 60 meshes by using a mechanical crushing method, washing the soluble components of crushed agricultural waste with acetone and deionized water successively and thoroughly drying the agricultural waste for subsequent usage; and (3) and delignification of the agricultural waste: fully mixing 5 to 500 g of the composite ionic liquid with 1.5 to 60 g of the agricultural waste and carrying out a reaction in an inert atmosphere at a temperature of 120 to 260 DEG C under stirring so as to obtain high-purity lignin and biological micromolecular substances. According to the method, the content of the obtained lignin is high; the usage amount of the ionic liquid is low; and the composite ionic liquid is cyclically usable and does not need addition of deionized water.

The invention discloses an isoindigo conjugated polymer, a semiconductor CNT ink, and a preparation method and an application of the polymer. The isoindigo conjugated polymer comprises a composition unit represented by a formula shown in the description; and in the formula, R1 comprises any one of a heteroalkyl group, and a C1-20 linear or branched alkyl group, R2 comprises any one of a hydrogen atom, a heteroalkyl group, a halogen atom, a C1-20 linear or branched alkyl group, Ar comprises a conjugate unit composed of any one or two or more of one to four five- or six-membered aromatic ring, five- or six-membered aromatic heterocyclic group and a polybasic aromatic fused ring, and n is any integer in a range of 2-500. The isoindigo conjugated polymer can specifically bind to semiconductor carbon nanotubes, so the isoindigo conjugated polymer can be used in the highly selective separation of the semiconductor carbon nanotubes in commercial carbon nanotubes; and the isoindigo conjugated polymer can form the semiconductor carbon nanotube (CNT) ink having high purity, and the ink can be used for constructing a semiconductor device having superior performances.

Disclosed is a selective separation and recycling method for industrial solid waste slag. The selective separation and recycling method is suitable for recycling the solid waste slag generated in steel, metallurgy and chemical industries. The selective separation and recycling method is based on the systematic study of the microstructure of the industrial solid waste slag, high-selectivity chemical agents are adopted, through soaking, milling, magnetic separation, multistage sedimentation and other process steps, bonding materials between crystalline particles are dissolved or softened, and thus spatial dissociation of the crystalline particles with different components is achieved with a chemical method. Meanwhile, the surface characteristics of certain crystalline particles are changed selectively through the high-selectivity chemical agents, the differences of the sedimentation performance of different components are enhanced, separation of multistage sedimentation is completed conveniently, thus the separation efficiency is improved, energy consumption can be reduced by a large margin, and the treatment process is simplified. The selective separation and recycling method is suitable for recycling steel slag, stainless steel slag, metallurgy waste slag and the like and can also be used for recycling useful components or enrichment of certain trace elements from chemical solid waste slag.

The invention belongs to the technical field of ore flotation, in particular to a selective oxidation method for pyrite gangues in sulfide ores. The method comprises treating slurry containing the sulfide ores and an oxidant by a catalyst of a structural formula 1 under radiation of light and performing photo-catalytic selective oxidation on the pyrite gangues in sulfide ores. The method further comprises a means of pre-treating the sulfide ores based on the selective oxidation method and then performing flotation separation. According to the technical scheme, photo-catalysis mediated by the formula 1 can oxidize iron sulfide gangue minerals in the sulfide ores specifically, such that it is favorable for flotation separation of iron sulfide gangues and useful sulfide ores.

The invention discloses a method for separating lead ions in waste water by utilizing single-arm bonded alicyclic crown ether silicone resin, and belongs to the technical field of heavy metal ion separation. Firstly, the single-arm bonded alicyclic crown ether silicone resin is added into the leady waste water, according to the ratio of 0.01 to 1.0 of the weight of the single-arm bonded alicyclic crown ether silicone resin to the volume of the leady waste water, and the mixture is stirred or oscillated for 20 to 300 min at the temperature of 5 to 50 DEG C; secondly, solid-liquid two-phase filtration and separation are carried out, the residual concentration of lead ions in the liquid phase is measured, and the separation removal ratio is calculated by comparing the residual concentration with the initial concentration; and finally, the single-arm bonded alicyclic crown ether silicone resin is eluted with a nitric acid solution of 0.01-3 mol/L, washed repeatedly with deionized water and dried to obtain regenerated resin. The method provided by the invention has the advantages of high separation speed, high removal ratio and strong suitability for lead ions in heavy metal waste water; and the material can be used repeatedly and is low in cost.

The invention discloses an imprinted film material for selectively separating drug-resistant bacilli as well as preparation and application thereof, and relates to the field of new materials. The method comprises the following steps: preparing a semi-cured film; preparing and dilution a drug-resistant bacillus suspension, dropwise adding the diluted drug-resistant bacillus suspension onto a sterilized substrate, performing standing treatment, and then removing the solvent in a sterile environment; pressing the substrate loaded with the drug-resistant bacilli into the semi-cured film so as to form prints on the semi-cured film with the drug-resistant bacilli as template molecules, and heating and completely curing the film; stripping the imprinted film from the substrate to obtain an imprinted film precursor, washing off drug-resistant bacilli as template molecules on the precursor, and carrying out silanization treatment on the surface of the precursor to enhance the hydrophilicity ofthe film; and forming a microporous structure into the imprinted film to obtain the imprinted film material for selectively separating the drug-resistant bacillus. On the basis of ensuring the recognition capability of the traditional bacterial imprinting material, the interference of non-drug-resistant bacteria can be avoided, and the drug-resistant bacteria are promoted to generate selective movement and recognition so as to achieve the purpose of selectively separating bacteria.

The invention discloses a method for floating and separating polyvinyl chloride from waste mixed plastic based on a calcium carbonate pretreatment. The method comprises the steps that the waste mixedplastic containing PVC plastic is placed into a calcium carbonate solution, pretreatment is carried out at a temperature not lower than 40 DEG C, and the pretreated waste mixed plastic is subjected toa flotation process to achieve the separation between the PVC plastic and other plastic in the waste mixed plastic. According to the method for floating and separating the polyvinyl chloride from thewaste mixed plastic based on the calcium carbonate pretreatment, the pretreatment is carried out through a calcium carbonate solution under a specific temperature condition, so that the difference ofsurface components in the waste mixed plastic can be enlarged; and then through the flotation method, the PVC plastic can be separated from the waste mixed plastic with high selectivity and high recovery rate.

The invention provides a flotation collecting agent, a flotation reagent and a flotation method for improving the separation efficiency of ilmenite and gangue of ilmenite.The flotation collecting agent comprises a collecting agent A, the collecting agent A has a formula shown in the specification. In the formula, R1 is C1-C15 alkyl, C4-C15 cycloalkyl, allyl, ethynyl, phenyl, benzyl or benzyloxy; and R2 is hydrogen, C1-C15 alkyl, C4-C15 naphthenic base, propenyl, ethynyl, phenyl or benzyl. The collecting agent A serves as the flotation collecting agent of the ilmenite, benefited from the special synergistic effect of the benzene ring and the phosphate group, the collecting agent A shows good flotation selectivity and recovery rate, and the recovery rate and grade of the ilmenite can be improved.

A method is provided for enhancing selective separation of ore values by addition of an effective amount of a treatment reagent to the separation process, such as froth flotation. The treatment reagent can be added at different stages, such as to a grinding mill, conditioning tank before flotation, or in the flotation cells before, after or simultaneous to the addition of other conventional flotation reagents. By adding the treatment agent, the recovery of valuable minerals from a froth flotation process is increased. In an embodiment of the present invention, the treatment reagent is a water-soluble ethylene oxide/propylene oxide copolymer.

The invention discloses a method for separating precious metal palladium through selective adsorption from palladium-containing waste liquid by using double-arm bonding-type alicyclic crownether silicon resin, and belongs to the technical field of heavy metal ion separation. The method comprises the following steps: firstly adding double-arm bonding-type alicyclic crownether silicon resin into palladium-containing waste liquid according to a ratio of 0.01-1.0 of the weight of the double-arm bonding-type alicyclic crownether silicon resin to the volume of the palladium-containing waste liquid, then stirring or oscillating at a temperature of 5-50 DEG C for 20-300 min; filtering and separating the solid phase from the liquid phase, determining the residual concentration of palladium ions in the liquid phase, comparing with an initial concentration to calculate the separation recovery rate; eluting the double-arm bonding-type alicyclic crownether silicon resin with a nitric acid solution of 0.01-3 mol/L, repeatedly washing with deionized water, drying to obtain regenerated resin. The method provided by the invention is high in separation speed for palladium ions in the palladium-containing waste liquid, high in separation efficiency, strong in adaptability, recyclable in materials, and low in cost.

The invention discloses the preparation and application of an aflatoxin B1 aptamer affinity capillary monolithic column. An amino-modified aflatoxin B1 aptamer is modified onan organic-inorganic hybridamino capillary monolithic column through glutaraldehyde coupling and grafting, through the specific affinity effect of the aptamer and aflatoxin B1, the organic-inorganic hybrid monolithic column is high in column permeability and large in specific surface area. The trace, ultra-trace aflatoxin B1 in complex food samples can be separated and enriched with high sensitivity and high selectivity. Thesimple, sensitive and rapid detection of the aflatoxin B1 can be achieved by using a detection instrument together.

The invention belongs to the technical field of zinc smelting, and particularly relates to a method for selectively precipitating magnesium in a zinc-magnesium solution, which comprises the following steps of: adding a pre-reaction solution into the zinc-magnesium solution, carrying out pre-reaction to obtain a pre-reaction solution, respectively forming liquid flows by the pre-reaction solution and a combined precipitator solution, and contacting and mixing the liquid flows of the pre-reaction solution and the combined precipitator solution to carry out magnesium precipitation reaction; and controlling the pH value of the liquid flow mixing system to be 9.5-11, and then carrying out solid-liquid separation to obtain magnesium slag and zinc liquid. The method has excellent zinc and magnesium selectivity, magnesium can be selectively precipitated, and high-purity zinc liquid can be obtained at a high recovery rate.

The invention belongs to the field of mineral flotation, and specifically discloses a flotation separation method for galena and pyrite, which uses a compound capable of ionizing the structure of formula 1 as a flotation collector, and is used for the flotation of galena and pyrite Flotation is carried out on the mixed ore of iron ore, and the concentrate rich in galena and the tailings rich in pyrite are obtained by separation. The technical solution of the present invention has excellent flotation selectivity of galena and pyrite, and the flotation agent has the advantage of low toxicity, which greatly reduces the cost of subsequent mineral processing wastewater treatment and conforms to the concept of green mines.