128results about How to "High selectivity of adsorption" patented technology

The invention provides amino nitrogen heterocyclic ring resin and a preparation method thereof. The resin has a structure as shown in the specification, wherein M is a resin matrix, R can be H, also can be a group with hydroxyl, sulfydryl, an ether group, a thioether group, amide or an ester group, and also can be a nitrogen heterocyclic ring functional group which is the same as Q; Q is a nitrogen heterocyclic ring functional group, also can be pyridyl, imidazolyl, piperidyl, indolyl, and the like. The special functional group structure of the amino resin can be used for increasing the selective adsorption capacity of target metal ions more effectively, recycling valuable metals in the industries such as the wet metallurgy industry or the electroplating industry, and has high selection on copper ions.

The invention relates to endotoxin adsorbing material for curing endotoxemia in the bioseparation and the biomedical engineering fields. The adsorbing material which takes sepharose gel as a carrier is coupled with spacer arm molecules through the activating reaction, and then is coupled with two groups of quarternary ammonium salt cations and dewatering molecules as functional groups to be prepared. The adsorbing material is simultaneously coupled with the two groups of functional groups mutually effected with endotoxin, and further the adsorbing selectivity of the adsorbing material to the endotoxin is improved. The physicochemical property of the adsorbing material is steady, and the adsorbing material has good blood compatibility, thereby being able to used for removing the endotoxin in blood plasma, and curing the endotoxemia. The preparation process of the adsorbing material is simple, the preparation cost is low, and the adsorbing material belongs to the novel endotoxin adsorbing material.

The invention relates to a preparation method and application of a metal-organic framework material. The preparation method of the metal-organic framework material comprises the following steps: (1) adding cobalt nitrate hexahydrate and 5-(4-(5-tetrazyl) phenyl)m-phthalic acid into a mixed solvent of N,N-dimethylformamide and water, and stirring evenly to obtain mixed liquid; (2) putting the mixed liquid into an airtight high pressure reaction still, heating to 110 to 110 DEG C, preserving heat, and then cooling to room temperature to obtain a reaction product; (3) filtering the obtained reaction product to obtain a red blocky crystal; (4) exchanging the red blocky crystal with methyl alcohol, and then vacuum heating at 220 DEG C for 5 to 7 hours, thus obtaining the metal-organic framework material. The metal-organic framework material is used for selective adsorption separation on CO2 in a gas mixture of CO and the CO2.

The invention discloses a multielement modified bentonite adsorption material and belongs to the technical field of composite materials and water treatment. Sodium bentonite as a main material is modified by a multielement composite modifier containing an organic long carbon chain cationic surfactant, inorganic polyhydroxyl-based metal cations and a functional short carbon chain organic complexing agent by a copolymerization method to form the organic-inorganic multielement composite bentonite adsorption material. The organic-inorganic multielement composite bentonite adsorption material has porous and large specific surface area characteristics of inorganic pillared bentonite and high carbon content and strong hydrophobicity characteristics of organic bentonite and has strong metal ion complexation and adsorption functions of bentonite and thus organic matters can be adsorbed by surface adsorption and distribution and heavy metal ions in water can be removed by complexation. The organic-inorganic multielement composite bentonite adsorption material can be popularized and used in the waste water treatment field.

The invention provides a technique for preparing and activating an adsorbent of an active molecular sieve; the adsorbent of the active molecular sieve comprises the following components by weight: 80 to 90 percent of molecular sieve components and 10 to 20 percent of a binding agent; wherein, the silica-alumina molar ratio of the molecular sieve components is 1 plus or minus 0.1 and the exchange degree of Li<+> in the absorbent is not less than 88 percent by mole percentage. The absorbing and separating effect of the molecular sieve in the invention can meet the industrial requirements.

The invention provides a novel metal organic framework material with a CO2 preferential adsorption separation function and a preparation method of the metal organic framework material and belongs to the technical field of chemical sciences of inorganic and organic materials. The preparation method comprises the following steps: dissolving raw materials, namely cobalt perchlorate hydrate, 4,4'-diphenyldicarboxylic acid and 3,3',5,5'-tetramethyl-1,1'-dihydro-4,4'-dipyrazol into an organic solvent; and then reacting at 130 DEG C for 72 hours to obtain the product. According to the invention, a rarely-used method for mixing pyrazol-carboxylic acid difunctional coordinating group is adopted so as to obtain the stable novel metal organic framework material. The preparation process of the material is simple, simple and convenient to operate and low in cost; and the material has high specific surface area and good stability, is especially suitable for high preferential adsorption on CO2 and can be applied to separation and capturing of the CO2 in industrial waste gas.

The invention belongs to the technical field of separation and enrichment of polyaromatic hydrocarbon and particularly relates to a preparation method and an application of hydrophilic polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler. The filler which is prepared by adopting a molecular imprinting technique is specifically prepared by the following steps: by taking a polyaromatic hydrocarbon compound as a template molecule, carrying out polymerization reaction in the presence of a functional monomer, a crosslinking agent, an initiator and a pore-foaming agent; introducing an assistant monomer in the reaction process; after reaction, carrying out oxidizing reaction to obtain hydrophilic highly selective polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler; and preparing a solid phase extraction column by using the polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler. By introducing the hydrophilic groups, the surface hydrophilicity of the filler is remarkably improved, the adsorption effect of the filler on other lipophilic polyaromatic hydrocarbon substances is weakened, and the adsorption selectivity is improved. Meanwhile, the wetting effect between a water body and the filler is remarkably improved as the surface hydrophilicity is changed, so that polyaromatic hydrocarbon in the water body is separated and enriched.

The present invention discloses a modified attapulgite preparation method. The preparation method comprises: modifying attapulgite activated by an acid by an amino compound to obtain an amino composite material, and modifying the amino composite material to obtain a composite material by an end modifying reagent. The obtained amino composite material is modified by the end modifying reagent to obtain the composite material. According to the preparation method provided by the present invention, the effective active functional group dithiocarbamate group is embedded into an attapulgite layer or is modified on the surface of attapulgite to form a dithiocarbamate attapulgite composite material. A plurality of active groups of the dithiocarbamate attapulgite composite material make the adsorption capacity of the composite material be extremely strong. The preparation method provided by the present invention effectively improves the capacity of adsorbents for adsorbing heavy metals, and is low in process cost, safe to use and free of secondary pollution. The modified attapulgite prepared by the preparation method is suitable for repairing heavy metal contaminated soil. The modified attapulgite is particularly excellent for adsorbing heavy metals: chromium, mercury, cadmium and lead.

The invention relates to an adsorbent for refined and denitrified lubricating oil base oil. The adsorbent comprises porous attapulgite powder obtained sequentially through solvent modification, high-temperature activation, pulverization and sieving, wherein the specific surface area of the porous attapulgite powder is 100-200m<2>/g, the water content is smaller than 6 percent, and the grain size of more than 90 percent of the porous attapulgite powder is 200-300 meshes; and the porous attapulgite powder accounts for more than 70 percent of the total weight of the adsorbent. The adsorbent not only can reduce the adsorption temperature, reduce the dosage and the energy consumption of the adsorbent and improve the oil yield, but also generates no environmental pollution.

The invention relates to a method for preparing a chelate resin immobilized with dendrimer, which is characterized in that the chelate resin immobilized with the dendrimer uses a macroporous resin as a framework, is immobilized or anchored with the hydrophilic dendrimer; and the immobilized dendrimer is modified by introducing functional groups to prepare the novel chelate resin with high selectivity and adsorption capacity. The framework of the chelate resin is a polystyrene macroporous resin and has 5 to 25 percent of crosslinking degree, 5 to 800 meshes of grain diameter and 40 to 2,500 nm of average pore size of the pore channel. The amount of the generations of immobilized hydrophilic dendrimer is between 2 and 9 generations. The functional groups for modifying the dendrimer comprise -COOH (or -COONa), -OH, N, P or As. The chelate resin is mainly used for low-concentration valuable metal recovery and heavy metal treatment in the waste water. The chelate resin absorbing specific metals can be used as a catalyst.

The invention discloses a modified montmorillonite carbon dioxide adsorption material and a preparation method thereof. According to the preparation method, a inorganic intercalation agent is used for intercalation so as to insert an inorganic substance into montmorillonite crystal layers, and increase the specific surface area of montmorillonite. The preparation method comprises following steps: preparation of TiO2 intercalation agent; preparation of SiO2 intercalation agent; preparation of TiO2-SiO2 composite intercalation agent; and preparation of the modified montmorillonite carbon dioxide adsorption material. The preparation method is simple; the specific surface area of the obtained modified montmorillonite carbon dioxide adsorption material ranges from 450 to 500m<2>/g; pore volume ranges from 0.28 to 0.32cm<3>/g; pore diameter ranges from 3 to 5nm; the modified montmorillonite carbon dioxide adsorption material possesses excellent absorption capacity on carbon dioxide; cycling stability is excellent; and compared with other modified molecular sieve porous materials, cost is reduced greatly, the modified montmorillonite carbon dioxide adsorption material is of no toxicity and is harmless, and is capable of satisfying industrial processes, especially carbon dioxide removing on absorption materials.

The invention discloses a high-strength super-macroporous separating medium for plant polyphenols extraction. The separating medium is wholly molded in a separation column, has amino functional groups, compression strength of 5-10 MPa, porosity of 60-90%, and pore size of 10-500 microns; the holes are continuously formed in the medium. When prepared, a polyvinyl alcohol water solution is mixed with a crosslinking agent; the mixture is added with a catalyst and then gradually cooled and frozen; after crystallization and crosslinking reaction, the crystals are taken out and thawed to form a super-macroporous PVA (polyvinyl acetate) crosslinking support; a chitosan acid solution, the crosslinking agent and an initiator are used to substitute water in the support; after crystallization and chitosan crosslinking reaction, the substance is thawed to form a super-macroporous PVA-CTS (polyvinyl acetate-chitosan) dual-network crosslinking continuous bed; the continuous bed is reacted with the amino to generate the super-macroporous separating medium with the amino functional groups. The separating medium can be widely applied to extraction of the plant polyphenols, and further can be used as an adsorbing separating medium for wastewater treatment field of heavy metals and anionic dye and the like.

The invention discloses a method for preparing chitosan resin for extracting noble metals from bittern, which comprises the steps of preparing a chitosan glacial acetic acid solution, synthesizing cross-linked chitosan and preparing silica gel-loaded cross-linked chitosan resin. By performing crosslinking modification on the chitosan through crosslinking reaction and adding silica gel into the chitosan to prepare the silica gel-loaded cross-linked chitosan resin, the method combines the chemical stability of the silica gel with the high adsorbability of the chitosan, improves the adsorptive selectivity of the chitosan resin material by introducing a hydrosulfide group with special adsorbability to noble metal ions, and overcomes the defects that single chitosan resin is difficult to granulate, and has a small specific weight, poor mechanical strength and the like. The prepared silica gel-loaded cross-linked chitosan resin has the advantages of low cost, high efficiency, simple process, no pollution and the like, is used for extracting the noble metals from sweater bittern, has a large adsorption capacity, and has good effects of enriching, separating and reclaiming trace noble metals. Besides, the resin is convenient to reproduce and can be used repeatedly.

The invention discloses preparation of high-hydrophilcity macroporous absorption resin and a method for removing caffeine in crude tea extracts. A method for preparing the resin comprises the steps of: dissolving gelatin or polyvinyl alcohol in water to prepare an aqueous phase, mixing TAIC (triallyl isocyanurate) and VAc to form a polymeric monomer, adding long-chain aliphatic paraffins of C7-C12 as a porogenic agent and adding AIBN (azo-bis-isobutyronitrile) as an initiator to form an oil phase for polymerization; mixing the aqueous phase with the oil phase, stirring and heating, filtering out resin, washing the resin with deionized water and drying; and mixing the dried resin with a sodium hydroxide aqueous solution, stirring and heating for reaction, standing for cooling to room temperature after the reaction to prepare the high-hydrophilcity macroporous absorption resin. By using the high-hydrophilcity macroporous absorption resin for separating commercial crude tea extracts, the caffeine in the crude tea extracts can be completely eliminated only through a simple continuous process including adsorption and elution in one step, and the yield of tea polyphenol is more than 90%. The process for removing the caffeine is simple to operate and is free from the application of toxic solvents, the resin is recyclable, the production cost is low, and the method is particularly suitable for large-scale industrial production.

The invention relates to a method for preparing N-vinyl pyrrolidone in a dehydration mode with N-hydroxyethyl pyrrolidone. The method includes the steps that gas with acidic components or alkaline components or liquid with alkaline components and N-hydroxyethyl pyrrolidone are mixed, the mixture passes through a dehydration-catalyst fixed bed reactor under the conditions that temperature ranges from 300 DEG C to 500 DEG C, pressure ranges from 0.01 MPa to 0.1 MPa, and the gas phase airspeed ranges from 10 h-<1> to 5,000 h-<1>, and the N-vinyl pyrrolidone product is obtained. The preparing method is obviously better than the prior art in the conversion rate respect, the selectivity respect and the service life respect.

The invention discloses a phosphorylated peptide adsorption enrichment method comprising (1) a non specific adsorption inhibitor and part of a to-be-tested sample are added a sample loading buffer, and an enrichment filter column is used for phosphorylated adsorption enrichment; (2) enrichment products are collected, the abundance of 20 kinds of amino acids in non phosphorylated peptide can be calculated as first abundance, the abundance of the non phosphorylated peptide in the 20 kinds of amino acids can be calculated as second abundance, at least one amino acid with higher ratio of first abundance to second abundance can be selected as an additive; (3) the sample loading buffer added with the additive is used for phosphorylated adsorption enrichment of the to-be-tested sample. By use of the competitive adsorption effects of amino acids and peptides, adsorption of the non phosphorylated peptide can be reduced, adsorption selectivity of the phosphorylated peptide enrichment can be increased, and the method lays the foundation for improving the accuracy and stability of phosphorylation detection.

The invention provides a 2, 4, 6-trichlorophenol molecular engram microsphere polymer. The invention also provides a method for preparing the 2, 4, 6-trichlorophenol molecular engram microsphere polymer. The invention also provides application of the 2, 4, 6-trichlorophenol molecular engram microsphere polymer in enriching and/or separating 2, 4, 6-trichlorophenol. The invention also provides the application of the 2, 4, 6-trichlorophenol molecular engram microsphere polymer in monitoring and/or processing the 2, 4, 6-trichlorophenol in an environmental water sample. The invention also provides a method for detecting and/or processing the 2, 4, 6-trichlorophenol in a sample through the 2, 4, 6-trichlorophenol molecular engram microsphere polymer. The polymer has simple and convenient preparation, an even grain size, a large specific surface area and pore volume, and high absorption selectivity. The polymer can be used for carrying out the experiment directly in the water environment without excessive other organic agents. The polymer is environmentally friendly and has a high absorption speed.

The invention discloses a method for separating CO2 from CO2/CH4 mixed gas. The method comprises the following steps: drying activated carbon; modifying a mixture of the dried activated carbon with 2-methylimidazole, ethylene glycol and ethanol; performing adsorption separation on CO2 in CO2/CH4 mixed gas with the modified activated carbon in a sapphire kettle under specific conditions; and calculating the CO2 adsorption capacity of modified activated carbon and a separation factor of CO2/CH4 mixed gas. According to the invention, 2-methylimidazole, ethanol and ethylene glycol are supported onthe surface of activated carbon, so that N atoms in 2-methylimidazole molecules and hydroxyl groups in ethanol and ethylene glycol molecules on the surface of activated carbon form hydrogen bonds andfurther forms a film on the surface of activated carbon to hinder the adsorption of CH4 molecules; at the same time, CO2 molecules react with 2-methylimidazole to form carbamate containing N-C bonds,so as to improve the CO2 adsorption selectivity of activated carbon and greatly improve the separation effect of activated carbon to CO2/CH4 mixed gas.

The invention belongs to the technical field of swelling-adsorption separation, and in particular relates to a resin ball capable of swelling and adsorbing aromatic hydrocarbon in a hydrocarbon mixture and a preparation method of the resin ball. The resin ball is an irregular copolymer obtained by the following steps of: using styrene as a main monomer; obtaining a cross-linked polystyrene resin ball through appropriately cross-linking the resin ball by a cross-linking agent; and then modifying the cross-linked polystyrene resin ball by a sulfonating agent, wherein the mole ratio of the styrene monomer to the cross-linking agent is (100:1)-(10:1), the dosage of the sulfonating agent later is 0.048-0.48 moles of sulfuryl for per 100 grams of the cross-linked polystyrene resin ball, and the grain diameter of the resin ball capable of swelling and adsorbing the aromatic hydrocarbon in the hydrocarbon mixture is 0.45-2mm. The resin ball has the characteristics that the raw material is available, the synthesis is convenient, the recycling can be realized, a gradient separation method is adopted, the aromatic hydrocarbon can be efficiently separated from the hydrocarbon mixture, and a more convenient new way for efficiently separating the aromatic hydrocarbon and non-aromatic hydrocarbon is provided.

The invention provides a metal-doped high molecular material, which consists of a matrix polymer, a hydrophilic group and a transition metal ion which is doped on the matrix polymer, wherein the matrix polymer is formed by polymerizing an organic compound containing -C=C- and a compound containing -C=C-......-C=C-; the quantity of C in the organic compound containing -C=C- is 2-10; the quantity of C in the organic compound containing -C=C-......-C=C- is 4-15; the hydrophilic group is one or more of sulfonyl, cyan, tertiary amino, quaternary ammonium group or hydroxyl; and the transition metal ion is an ion of Ti, V, Cr, Fe, Cu, Ni or Zn. A relatively stable complex can be formed by the transition metal ion and ammonia nitrogen in water, so that the aim of removing ammonia nitrogen from water is fulfilled. The metal-doped high polymer material provided by the invention has the advantages of high absorptive selectivity to ammonia nitrogen in sewage, high absorption amount, concentration of effluent ammonia nitrogen in water less than 10 ppm, convenience for regenerating and simple process.