236 results about "Preferential adsorption" patented technology

A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal ion that is adapted to form π-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by π-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.

The invention relates to a beneficiation method for copper sulfide ore containing easily-sliming gangue minerals. According to the method, lime is adopted as pH regulator and pyrite depressant of flotation pulp of the copper sulfide ore containing the easily-sliming gangue minerals; sodium sulfide serves as activator of a small number of copper oxide minerals in the ore; sodium hexametaphosphate, sodium silicate or ethylenediamine serves as gangue slurry dispersant; a combination of butyl xanthate and other collectors serves as a collector of copper sulfide minerals; terpernic oil serves as foaming agent. The ore is subjected to primary grinding, primary roughing, primary scavenging and three-time concentration; the ore pulp is subjected to strong stirring and pulp mixing before starting to be subjected to primary roughing, primary scavenging and primary concentration, so that copper contained in the ore is efficiently recovered. According to the method, through reasonable combination and addition of chemicals, the ore grinding and pulp mixing process is strengthened, the adverse influence of gangue slurry on copper sulfide mineral floatation is eliminated, the surface characteristics of copper sulfide minerals are improved, the preferential adsorption of the collector on the surfaces of the copper sulfide minerals is enhanced, and accordingly, compared with a conventional method, the copper grade and the copper recovery rate of copper concentrate are substantially increased.

The invention aims at providing a carboxylated MCM-41 mesoporous molecular sieve for adsorbing heavy metal ions (such as copper, chromium, lead, cadmium, cobalt, nickel, zinc, ferrum, mercury, silver, barium and the like) in waste water, and a preparation method thereof. The carboxylated MCM-41 mesoporous molecular sieve is characterized in that a mesoporous molecular sieve MCM-41 is utilized as a supporter; the surface of the carboxylated MCM-41 mesoporous molecular sieve contains organic functional groups (-COOH groups); the organic functional groups can undergo a coordination reaction or a chelation reaction with transition metal ions to produce an effective preferential adsorption effect. The carboxylated MCM-41 mesoporous molecular sieve has the advantages of extremely high specific surface area, regular pore canal structure, and uniform distribution of organic functional groups on the pore surface. The carboxylated MCM-41 mesoporous molecular sieve has a high adsorption capacity for heavy metal ions in waste water. The preparation method has the advantages of simple process, moderate reaction conditions, easy operation, good reappearance, environmentally friendly characteristics and good application prospects.

The invention relates to a quality chemical sensor using a functionalized mesoporous material as a sensitive material, and a manufacturing method and application thereof, and belongs to the field of micro-nano sensors. The sensor is characterized in that: an organic functionalized mesoporous material is used as the sensitive material, and a quality transducer is used as a sensitive detection platform. In the quality chemical sensor, preferential adsorption of specific target chemical molecules is realized by utilizing specific organic functional groups of the functionalized mesoporous material, the adsorption capacity of the sensitive material to the specific target chemical molecules is improved by utilizing the high specific surface area and porosity of the functionalized mesoporous material, and the adsorption of the functionalized mesoporous material to the specific target chemical molecules is converted into electrical signals to be outputted by utilizing the quality transducer so as to detect the specific target chemical molecules.

The invention relates to a molecular engram polymer, which is used for metal ion detection. The engram and elution objects are metal complex ions; engram geometric dimensioning and combination point location of the polymer are matched with the specificity of the metal complex ions; the polymer is synthesized in-situ on metal membrane surface of a quartz microbalance and a surface plasma resonance device, the metal complex ions are eluted, the metal ions to be detected are processed by complexation and then are selectively absorbed by the molecular engram polymer, and finally the type and content of the metal ions are detected. In the invention, metal ion complexation is adopted to enlarge small changes of metal ion volume by a large extent, template molecular geometric structure memory performance of the molecular engram polymer is utilized to realize high preferential adsorption to improve metal ion detection selectivity effectively, and mass increase and geometric dimensioning enlargement caused by metal ion complexation help further improve sensitivity and antijamming capability of metal ion detection.

Processes and apparatuses are provided for preparing liquified natural gas from a natural gas feed that comprises C5 to C7 hydrocarbons and C8 or greater hydrocarbons. An exemplary process includes effecting the preferential adsorption of the C8 or greater hydrocarbons from the natural gas feed over adsorption of hydrocarbons having less than 8 carbon atoms to provide a C8-depleted natural gas stream. The process continues with effecting the preferential adsorption of the C5 to C7 hydrocarbons from the C8-depleted natural gas stream over adsorption of hydrocarbons having less than 5 carbon atoms to form a C5 to C8-depleted natural gas stream. The C5 to C7 hydrocarbons are preferentially adsorbed with higher selectivity and capacity than adsorption of the C5 to C7 hydrocarbons during preferentially adsorbing the C8 or greater hydrocarbons. The C5 to C8-depleted natural gas stream is then liquified.

The invention relates to anion resin for bilirubin absorption and a preparation method thereof. According to the invention, in the anion resin for bilirubin absorption, styrene is adopted as monomers, divinyl benzene is adopted as a cross-linking agent, maleic anhydride copolymer microspheres and organic small molecules are adopted as a pore-forming agent, and oil dispersible hyperoxide is adopted as an initiating agent; porous microspheres are prepared through suspension polymerization; and the anion resin with preferential bilirubin adsorption ability is obtained through quaternary ammoniation treatment, wherein the theoretical crosslinking degree of the resin is 4-20%, the average pore size of total pores is 80-120nm, and functional groups are quaternary ammonium salt groups. Accordingto the invention, the anion resin with uniform pore sizes, good permeability, good blood compatibility, high preferential adsorption of bilirubins, is obtained, and the problems in the prior art, such as poor absorption selectivity, high prices of imports, and the like, are solved.

The invention adopts an in-situ oxidation polymerization method and enables the polyaniline to be wrapped on the surface of the magnetic ferrate, and a series of ferrate/polyaniline magnetic nano composite materials can be prepared by using the method and comprise cobalt ferrite/polyaniline, nickel ferrite/polyaniline, copper ferrite/polyaniline, zinc ferrite/polyaniline and manganese ferrite/polyaniline and the like. A prepared ferrate/polyaniline magnetic nanometer catalytic agent has obvious preferential adsorption performance and good photoelectrical activity, and has good application prospects and economic benefits in the fields of adsorption, photocatalysis, lithium ion batteries and the like.

The invention belongs to the field of refrigerants, and provides a catalyst used for preparing fluorinated alkene with chloro-fluoro alkane and a preparation method thereof. The general formula of the catalyst is n wt.%M/X, wherein M stands for an active component, X stands for a carrier, and n stands for the dosage of the active component; the active component is composed of alkali metal oxide, rare-earth oxide, and high valent metal oxide; the carrier adopts coal-based activated carbon or plant-based activated carbon; the dosage of the active component is less than or equals to 40% of the total mass of the catalyst. The method comprises the following steps: dipping the carrier in water solution corresponding to the active component, drying the dipped carrier at the temperature of 80-120 DEG C for more than 12 h, and finally, roasting at the temperature of 400 DEG C-550 DEG C for 6 h to obtain the catalyst. The catalyst manufactured by the method has higher preferential adsorption for chloro-fluoro alkane molecules, so as to have low purity requirement for raw materials, high selectivity for dehydrochlorination, and high yield for a target product.

The invention relates to a preparation method of a modified magnetic chitosan microsphere heavy metal ion adsorbent, and in particular relates to a modified magnetic chitosan material which has good selectivity and adsorptive property for heavy metal ions in food, and can be recycled, and a preparation method of the modified magnetic chitosan material. Specifically, the invention discloses the preparation method of the modified magnetic chitosan microsphere heavy metal ion adsorbent. The method comprises the steps of preparing magnetic chitosan microspheres by taking chitosan powder as a raw material, further preparing the magnetic chitosan microspheres into hydroxypropyl chlorine magnetic chitosan microspheres, and carrying out chemical grafting on the hydroxypropyl chlorine magnetic chitosan microspheres by taking the hydroxypropyl chlorine magnetic chitosan microspheres as parents and 2-aminothiazole as ligands to obtain the modified magnetic chitosan microsphere heavy metal ion adsorbent. The modified magnetic chitosan microsphere heavy metal ion adsorbent prepared by the method has preferential adsorption for Hg2+ ions.

The invention discloses an environment-friendly grinding solution for a roller as well as a preparation method and a use method thereof. The grinding solution contains the following raw materials, such as sodium gluconate, a non-ionic emulsifier, an aqueous extreme-pressure lubricant, boric acid, glycerol, diethanol amine, a dicarboxylate-based composite anti-rusting agent, mono-butyl ether, a hard-water-resisting agent, a de-foaming agent and distilled water; and the aqueous extreme-pressure lubricant contains triethanolamine, dimer acid, macromolecular self-emulsified ester and distilled water. According to the grinding solution provided by the invention, an environment-friendly anti-sticking additive is used for dispersing lubricating components and the anti-sticking additive is preferably adsorbed on the surface of a grinding wheel, so that the lubricating components and abrasive dusts are prevented from being stuck on the surface of the grinding wheel; by utilizing the environment-friendly special extreme-pressure lubricant, the lubrication performance and the washing performance of the grinding solution can be stable in a long period; the flocculate of the grinding solution in a pipeline is reduced so that the liquid-supplying pipeline is smooth; the grinding solution has environment-friendly property and satisfies the requirements of the grinding solution on no toxin, no corrosion, good stability and good transparency; and processes for producing and using the grinding solution provided by the invention are simple.

The invention discloses a preparing method of a 2-Mercaptopyrimidine modified magnetic cotton-straw bast adsorbent. The preparing method of the 2-Mercaptopyrimidine modified magnetic cotton-straw bast adsorbent is characterized in that cotton-straw bast is firstly oxidized to obtain oxidized cotton-straw bast; then the oxidized cotton-straw bast is magnetized and aminated to obtain aminated magnetic cotton-straw bast; then materials, by mass fraction, of 76-82% of tetrahydrofuran, 2-5% of 2-Mercaptopyrimidine and 10-16% of aminated magnetic cotton-straw bast are added into a reactor, then the mixture is stirred, and 2-6% of fumaryl chloride is added dropwise, the sum of all the component is one hundred percent, stirring and a refluxing reaction are conducted at the constant temperature of 90+/-2 DEG C for four hours, after cooling, the mixture is then washed to be neutral through deionied water, and solid-liquid separation and drying are conducted to obtain the 2-Mercaptopyrimidine modified magnetic cotton-straw bast adsorbent. The 2-Mercaptopyrimidine modified magnetic cotton-straw bast adsorbent has a very high adsorption capacity on silver, is high in preferential adsorption of silver, low in cost, and high in mechanical strength; meanwhile, the 2-Mercaptopyrimidine modified magnetic cotton-straw bast adsorbent can be repeatedly used for more than eight times, and the adsorbent can be easily separated.

The invention relates to a preparation method of iron based metal organic frameworks, zinc based metal organic frameworks, copper based metal organic frameworks and chromium metal organic frameworks and application in the selective adsorption of sulfide. The method comprises the following steps: dissolving a metal ion compound and an organic ligand in a solvent, stirring to dissolve completely, heating to obtain a metal organic framework crystal, filtering, and drying to obtain a metal organic framework adsorption material, the metal organic framework adsorption material can be sued for preferential adsorption of sulfide in oil, and the adsorption capacity is greater than 10mgS / g.

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 discloses a method for screening antidiabetic active compounds. The method is characterized by comprising the steps of: (1) preparing bonding enzyme magnetic beads; (2) using at least two kinds of the bonding enzyme magnetic beads to conduct preferential adsorption on a traditional Chinese medicine solution or a natural extractive solution, enabling target proteins bonded on different bonding enzyme magnetic beads to be mutually different, and enabling the target proteins to be maltase, sucrase or lipase; (3) separating compounds jointly absorbed by all bonding enzyme magnetic beads to serve as a sample set; and (4) screening the antidiabetic active compounds from the sample set through inhibitory activity tests directing at the target proteins. The method for screening antidiabetic active compounds can screen the antidiabetic active compounds in a traditional Chinese medicine or a natural extractive aiming at multiple target points or enzymes, is applicable to development of anti-diabetic medicines, simultaneously reduces compound preparation and separation steps during initial screening in a traditional method, improves screening efficiency and shortens screening times.

The invention provides a preparation method and application of a Jannus dual-layered ionic imprinting composite film. The preparation method comprises the following steps: step 1, preparing nano crystal cellulose (NCC) turbid liquid; step 2, synthesizing GLYMO-IDA silane; step 3, synthesizing CPTES-ACAC silane; step 4, synthesizing a dual-layered ionic composite film; and step 5, synthesizing theJannus dual-layered ionic imprinting composite film. By means of the characteristics that the nano crystal cellulose which is wide in source is taken as a matrix functional self-assembled film, and athermosensitive monomer is grafted to achieve double preferential adsorption, the problem of adsorbing target ions preferentially can be solved well by introducing an ionic imprinting technology.

The invention discloses a sulfuric acid-boric acid-additive ternary anodizing fluid, which is prepared by adding 1.6-7.6ml of sulfuric acid, 0.1-1.1g of boric acid and 5-100mg of additive into 100ml of deionized water. The additive is benzotriazole, 2-mercaptobenzothiazole, dithizone or 8-oxyquinoline. The anodizing fluid of the invention is the improvement of aluminium and aluminium alloy sulfuric acid-boric acid binary anodizing fluid, and cupreous efficient cathodic corrosion inhibitor is added to enable that preferential adsorption of the corrosion inhibitor is carried out on the copper-containing particle position of an aviation aluminum alloy surface, thus forming a compact reticulatepattern complexing product, providing targeted protection on copper-containing aluminum alloy phase particles, decreasing the current concentration tendency, and inhibiting excessive growth of oxidation film cavern defect at the position of the copper-containing aluminum alloy phase particles.

A disclosed novel composite metal polishing fluid is characterized by being prepared from the following raw materials in parts by weight: 11-13 parts of cerium oxide, 2-4 parts of graphene oxide, 7-9 parts of rapeseed oil, 1-2 parts of stannous octoate, 4-6 parts of polyoxyethylene sorbitan fatty acid ester, 3-5 parts of polyoxyethylene castor oil, 4-6 parts of urea, 2-4 parts of citric acid, 4-6 parts of emulsified silicone oil, 5-7 parts of an auxiliary agent, and 300 parts of deionized water. The prepared mixed polishing fluid is safe, non-toxic and reasonable in formula. Through the cooperation of the added surfactant and the abrasive, the polishing effect is improved, preferential adsorption is realized, and a long-term easily-cleaned physical adsorption surface is formed. By adding the auxiliary agent, the polishing fluid has good dispersity, lubricity and film-forming property, and is capable of forming an air-obstructing layer on a workpiece surface to prevent air from corroding a metal surface. The polishing fluid is capable of satisfying the polishing processing requirements of various products and parts, and helps to improve the polishing efficiency, cleaning effect, surface precision and the like.

The invention discloses two fluorinated metal organic framework materials, preparation and low-carbon hydrocarbon separation application thereof, and belongs to the technical field of crystalline porous material preparation and gas separation. The two microporous copper-based MOF materials are formed by a cheap and easily available multi-coordination organic ligand 3-fluoroisonicotinic acid (FINA)and copper nitrate under different solvothermal conditions. The two MOF crystal structures have high porosity and have regular one-dimensional channels, the size of the channels is slightly larger than the molecular dynamics size of low-carbon hydrocarbon, and a structural basis is provided for adsorption separation of the low-carbon hydrocarbon gas molecules. Besides, hydrogen bond interaction sites exist in the pore channels, and alkyne molecules with smaller kinetic sizes can enter the pore channels easily after the pore channels are cut by fluorine atoms, and the acting force between alkyne gas molecules and the framework is enhanced so that the effect of preferentially adsorbing acetylene gas in acetylene-ethylene mixed gas and preferentially adsorbing propyne in propyne-propylene mixed gas is achieved, ethylene and propylene components in the mixed gas are purified, and the energy consumption in the separation process is reduced.

The invention discloses a method for preparing uniform spherical cyclodextrin resin particles by reversed phase suspension polymerization and application thereof. The method takes alpha, beta and gamma cyclodextrin as the raw material respectively and adopts chloropropylene oxide etc. as the cross-linking agent. In an oil dispersion medium and with the effect of a catalyst, three kinds of uniformspherical cyclodextrin resin particles can be obtained respectively by means of reversed phase suspension polymerization. By controlling the reaction temperature, the proportioning of cyclodextrin and other components, the catalyst amount and the reaction time and other reaction conditions, the cyclodextrin content in the cyclodextrin resin and the particle appearance and size can be controlled. The cyclodextrin resin of the invention can be widely used in preferential adsorption and recovery of harmful substances in water like phenol.

A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal cation that is adapted to form π-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by π-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.

A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and a thiophene/thiophene compound-rich adsorbed component. The adsorbent includes either a metal or a metal ion that is adapted to form π-complexation bonds with the thiophene and/or thiophene compounds, and the preferential adsorption occurs by π-complexation. A further method includes selective removal of aromatic compounds from a mixture of aromatic and aliphatic compounds.

The invention discloses a preparation method and gas separation application of a copper-based microporous metal organic framework material, and belongs to the technical field of crystalline porous material preparation and gas separation. The material is prepared from an organic ligand 3-hydroxyisonicotinic acid (3-OH-INA) and copper acetate under a solvothermal condition, wherein the organic ligand 3-hydroxyisonicotinic acid (3-OH-INA) is simple in structure, low in price, easy to obtain and rich in coordination mode. A unique zigzag one-dimensional channel exists in the Cu-MOF structure, thesize of the channel is slightly larger than the dynamics size of a low-carbon hydrocarbon molecule, and a structural basis is provided for the adsorption process of the gas. Besides, the ligands regularly arranged in the pore channels provide multiple hydrogen bond interaction sites, and the acting force between ethane gas molecules and a framework is enhanced, so that the effect of preferentiallyadsorbing ethane gas in ethane-ethylene mixed gas is achieved, the ethylene purification task is completed in one adsorption period, and the energy consumption in the separation process is further reduced.

The invention belongs to the technical field of adsorption and separation, and specifically, relates to a resin ball capable of preferential adsorption of an aromatic hydrocarbon component of a hydrocarbon mixture, and a preparation method thereof. The resin ball is a styrene resin ball which has a certain crosslinking degree and is subjected to copolymerization modification by polar monomers. Through the difference of swelling adsorption capacities of the resin ball on aromatic hydrocarbons and non-aromatic hydrocarbons, an aromatic hydrocarbon component of a hydrocarbon mixture can be adsorbed conveniently by the resin ball so that an aromatic hydrocarbon component separation effect is realized. The resin ball is a random copolymer, wherein styrene is utilized as a main monomer, and various polar monomers and different cross-linking agents are utilized to modify styrene. The resin ball is prepared from easily available raw materials, is easy for synthesis, can be recycled, is convenient for operation and aftertreatment, simplifies a process flow, and reduces an operation cost and energy consumption. In application, through a gradient centrifugation method, the resin ball provides a novel and simple approach for high-efficiency separation of aromatic hydrocarbons and non-aromatic hydrocarbons.