643results about How to "High adsorption selectivity" patented technology

The invention discloses a method for preparing a manganese series lithium ion sieve adsorbent, and relates to a method for preparing an inorganic adsorbent for adsorbing lithium from liquid lithium resources such as brine of salt lake, seawater and the like. In the method, a cubic crystal ion sieve precursor Li1.6Mn1.6O4 is prepared from Mn2O3 and LiOH or Li2CO3 serving as raw materials by using two sections of solid-phase reactions, wherein the precursor also can be used as an anode material of a lithium ion battery. The precursor is acidized to obtain a lithium ion sieve adsorbent MnO2.0.5H2O (or expressed as H1.6Mn1.6O4), and the ion sieve is the lithium adsorbent which has high selectivity on lithium. The method has the advantages of simple and readily available raw materials, simple process, high adsorption capacity of the ion sieve, low cost, high purity of products and is easy to realize industrial production.

The invention aims to provide a preparation method and application of a porous nano metal organic framework material, and is characterized in that the preparation method comprises the steps: adding a metal ion, an organic ligand, a surfactant and a nanocrystalline guide agent or a reagent forming the nanocrystalline guide agent into a growth medium, forming a framework structure through chemical complexation, crystallizing, filtering, washing, drying, and finally obtaining the porous nano metal organic framework material. The addition amount of the surfactant is 0-30% of the molar concentration of the metal ion; the metal ion is one or more of Cu<II>, Al<III>, Mg<II>, Fe<III>, Ni<II>, Co<II> and Zn<II>; the organic ligand has at least one atom independently selected from oxygen, sulfur and nitrogen and can be subjected to coordinated complexation to the metal ion through the atom. The method not only can effectively suppress the size of MOFs materials, but also easily improves size homogeneity and synthetic efficiency of the product.

The invention relates to a preparation method of a mesoporous X-type molecular sieve and a method for preparing an adsorbent by using the molecular sieve as an active component. The prepared adsorbent based on the mesoporous X-type molecular sieve is used as a paraxylene adsorptive separation adsorbent. The method for preparing the mesoporous X-type molecular sieve comprises the following steps: by using water glass as a silicon source and aluminum hydroxide as an aluminum source, adding a template, and carrying out hydrothermal synthesis to obtain the mesoporous X-type molecular sieve. The mesoporous molecular sieve and kaolin are proportionally molded to obtain 0.3-0.8mm granules, and the granules are subjected to barium ion or (and) potassium ion exchange until the exchange degree is greater than 99%, thereby obtaining the adsorbent which has excellent adsorptive separation capacity for paraxylene in C8 aromatic hydrocarbons. Compared with the prior art, the active component mesoporous X-type molecular sieve of the adsorbent, which is prepared by using the template, has the crystal form structure of the X-type molecular sieve and the pore distribution of the mesoporous and microporous dual models; the mesoporous pore size distribution is 2nm or so; and thus, the problem of overlow mass transfer rate in the adsorbent can be solved.

The invention discloses a preparation method of amidoxime group uranium extraction sorbent, comprising the following steps: firstly, adopting polyacrylonitrile powder as a raw material, producing uranium extraction sorbent containing amidoxime group by amidoximation; adding titanium dioxide sol which is prepared by the sol-gel method for blending to ensure that the weight percent of titanium dioxide and polyacrylonitrile is 0.4-2.0%; producing hybridized amidoxime group uranium extraction sorbent by water washing, alcohol washing and drying. The invention has the advantages that the amidoxime group uranium extraction sorbent material which is hybridized with titanium dioxide has higher mechanical strength, higher adsorption quantity of uranium, and higher adsorption selectivity to uranium in the presence of calcium and magnesium ions.

Provided are a method for advantageously producing iron oxyhydroxide exhibiting excellent adsorbing capability for harmful substances, such as a phosphorus component and an environmental hormone, in an industrial waste water and an exhaust gas; and an adsorbing material comprising the iron oxyhydroxide produced by the method as a main component. Specifically, provided are a method for producing iron oxyhydroxide, characterized in that it comprises: (a) a step of adding a base to an aqueous solution containing an iron ion so as for the resultant mixture to have a pH of 9 or less, to thereby form a precipitate containing iron oxyhydroxide, (b) a step of drying the above precipitate at a temperature of 100 DEG C or lower, to thereby prepare iron oxyhydroxide, (c) a step of contacting the resultant iron oxyhydroxide with water, and (d) a step of subjecting the resultant iron oxyhydroxide to a heating treatment in a gas atmosphere having an inert gas concentration of 80 % or more at a temperature of 100 to 280 DEG C; and an adsorbing material comprising the iron oxyhydroxide produced by the method as a main component.

The invention relates to a composite type mercury ion adsorbent and a preparation method thereof. The adsorbent consists of chitosan, polyvinyl alcohol and clay. A polyvinyl alcohol macromolecular chain and a chitosan macromolecular chain are penetrated and wound mutually by high-speed stirring, so that the inorganic clay is dispersed fully; and the release of the chitosan and the polyvinyl alcohol in the process of using the adsorbent is avoided effectively by a method of combining cross linking agent cross linking and freezing crossing linking of glutaraldehyde. The adsorbent has high adsorption capacity and high adsorptive selectivity on Hg(II) ions, hardly adsorbs Cd(II) and Pb(II) ions, and adsorbs a small amount of Cu(II) ions, and can be recycled, and adsorbability of the adsorbentis slightly influenced by the pH value of a solution. The integral preparation process is performed in an aqueous solution, the preparation method is simple and convenient, low in energy consumption,low in production cost, environment-friendly, and easy to industrialize, and special process equipment is avoided.

The invention discloses an N-acetylethylenediamine chelate resin and a preparation method thereof, belonging to the field of chelate resin. The constructional unit is shown in the specification, wherein the functional group is N-acetylethylenediamine; and the content of the functional group is 0.71-1.39mmol/g. The preparation method of the resin comprises the following steps: preparing a white ball; preparing a chlorine ball; extracting the chlorine ball through a soxhletextractor; then taking N,N-dimethylformamide as sweller, adding 2-aminothiazole-4-ethyl acetate potassium carbonate, and stirring for reaction to obtain faint yellow 2-aminothiazole-4-ethyl acetate based resin; washing the obtained resin; adding ethylenediamine solution; condensing and reacting; and filtering and drying to obtain the N-acetylethylenediamine chelate resin. The resin provided by the invention can selectively adsorb and separate heavy metal ions, such as Cu<2+> and the like, has wide applications in the fields of mining and metallurgy production mother solution extraction, production waste water management, heavy metal separation and preenrichment in the environmental analysis and the like.

The invention discloses a process for hypercritical extraction of grape seed oil and resin adsorption abstraction of proanthocyanidin, which comprises, employing hypercritical carbon dioxide to extract grape seed oil from comminuted grape seeds under abstraction pressure of 20-35MPa at 40-50 deg. C, heating degreased grape seeds with 25-35% water solution of ethanol for backflow, charging 50-70% ethanol or isopropanol solution into the concentrated extract liquid, agitating and stewing, decompressing and filtering, thus obtaining proanthocyanidin crude extract liquid, then adsorbing with polystyrene resin, carrying out desorption with desorbent after adsorption saturation, drying the eluent under reduced pressure, finally obtaining refined proanthocyanidin product.

The invention discloses a preparation method of ion imprinted hydroxamic acid chelate resin. According to the invention, propenyl hydroxamic acid is subjected to coordination with imprinting metal ions such as manganese, copper, cobalt, nickel, lanthanum, cerium, yttrium, praseodymium, neodymium, and the like; under the effects of a crosslinking agent and an initiating agent, a propenyl hydroxamic acid-metal ion chelate is polymerized; and the imprinting metal ion is eluted, such that the ion imprinted hydroxamic acid chelate resin is obtained. The method provided by the invention has the advantages of mild reaction condition and high reaction efficiency. The prepared resin has the advantages such as high absorption capacity, high absorption selectivity, and the like.

The invention discloses a method for separating ethylene and acetylene from a mixed gas. The method comprises the step of using a metal organic frame material as an adsorbent for separating the ethylene and the acetylene from the mixed gas containing the ethylene and the acetylene; the metal organic frame material has a structural formula of M(C7O5H4).2H2O, wherein M is a metal ion, and the metalorganic frame material is a three-dimensional network structure formed by coordination bonds or intermolecular forces from a transition metal ion or alkaline earth metal ion and gallic acid. The metalorganic frame material has a large adsorption capacity for the acetylene and an excellent selectivity for adsorption and separation of ethylene/acetylene. The materials for the synthesis of the material is cheap and easy to obtain, the material preparation process is simple, and the cost is low; and the material has good regeneration and repetition performance, can still maintain the original adsorption effect after vacuum or heating regeneration, and has broad industrial application prospects.

The invention provides a preparation method and a using method for polyamino/amidoxim-modified multifunctional ion exchange fibers. Polyacrylonitrile fibers used as a base material are sequentially grafted with a polyamino group and an amidoxim group through a hydrothermal process to prepare the polyamino/amidoxim-modified multifunctional ion exchange fibers. The chelation property of effective functional groups and metal ions is used to treat conventional metal element, nonmetal element or radioactive element wastewater. The preparation method and the using method are simple, the graft ratioof functional groups is high, and the prepared multifunctional ion exchange fibers have the advantages of stable performances, good hydrophilicity, high radiation resistance and high adsorption capacity. The problems of swelling-shrinkage and cracking of resin, silica gel and other traditional materials in different pH environments are avoided.

The invention relates to a method for preparing chitosan-ferric oxide composite absorption arsenic removal material, belonging to the technical field of water treatment. Based on the preparation of chitosan aquogel, gel balls of the chitosan aquogel are taken as matrix which is loaded with ferric oxide, and crosslinking treatment is carried out, so that the novel organic and inorganic composite material which is the chitosan-ferric oxide composite absorption arsenic removal material can be obtained. The composite absorption arsenic removal material has large adsorption capacity, high adsorption efficiency, strong adsorption selectivity and acid resistance as well as convenient solid-liquid separation, thus being an environment-friendly material which can be easily obtain and has low price and better application prospect.

The invention discloses a method of deeply purifying heavy metal micro-polluted water body through resin-based nano hydrated ferric oxide, which pertains to the technical field of water environmental treatment. The steps are: nano hydrated ferric oxide granules are supported on cation exchange resin so as to generate the resin-based nano hydrated ferric oxide materials; the water micro-polluted by the heavy metal passes through an absorption column which is filled with the resin-based nano hydrated ferric oxide or the heavy metal micro-polluted water and the resin-based nano hydrated ferric oxide are mixed in a container and then are vibrated before being centrifugally dried; the absorbed resin-based nano hydrated ferric oxide can be desorbed by acid fluid such as HC1or HNO3 solution etc. or can be desorbed and regenerated by EDTA solution. When a great number of cations such as Na<+>, k<+>, Ca<2+>, Mg<2+>, etc. exist in the polluted water, the invention still can reduce and lead the effluent heavy metal concentration to meet safety control standard; when a great number of competitive cations coexist in the heavy metal micro-polluted water, the effluent heavy metal concentration can be reduced to meet the safety control standard with very large treatment capacity.

The invention relates to an ultra-deep combined desulphurization method for full-fraction FCC gasoline. The method comprises the following steps: (1) with full-fraction FCC gasoline and hydrogen as raw materials, successively contacting the raw materials with a protective agent 1, a protective agent 2 and a selective dialkene removing catalyst in a dialkene removing reactor under proper operation conditions to remove the most of dialkene in the full-fraction FCC gasoline raw material; (2) contacting the full-fraction FCC gasoline having undergone dialkene removal in step (1) with a catalyst in a selective hydrodesulfurization reactor under proper operation conditions so as to remove 40 to 60% of sulfur in the full-fraction FCC gasoline; and (3) subjecting the full-fraction FCC gasoline having undergone selective hydrodesulfurization in step (2) to separation in a gas-liquid separator and gas stripping to remove hydrogen sulfide dissolved in the full-fraction FCC gasoline, then mixing the full-fraction FCC gasoline with fresh hydrogen and contacting the full-fraction FCC gasoline with a catalyst in an adsorption ultra-deep desulphurization reactor under proper operation conditions so as to remove the most of sulfur in the gasoline, thereby obtaining a gasoline product with ultra low content of sulfur. The method has the advantages of low loss of an octane value, high liquid yield, high adsorptive selectivity of an adsorbent, great sulfur capacity and the like while carrying out ultra-deep desulphurization.

The present invention relates to the process of extracting capasaicin from chili fruit or peel and preparing natural capsaicin crystal. Capsaicin is obtained through organic solvent extraction of thespicy component from chili fruit or peel, depressing concentration and separation and purification with macroporous adsorption resin. Liquid chromatographic test shows that the extract has total content of capsaicin and dihydrocapsaicin up to 33%. Re-crystallizing the macroporous adsorption resin purified extract may obtain natural capsaicin crystal with capsaicin, dihydrocapsaicin and nordihydrocapsaicin in the total content up to 97%.

The invention relates to a gasoline desulfurization adsorbent and preparation and application thereof. A preparation method of the gasoline desulfurization adsorbent comprises the following steps of: mixing a zinc salt, a VIII family non-precious metal salt, other salts and a precipitant in a proton-containing polar solvent, and undergoing a precipitation reaction at the temperature ranging from the room temperature to 15 DEG C to obtain a sulfur storing agent; and soaking a soluble salt containing a VIB and/or VIII family transition metal into a molecular sieve carrier containing gamma-Al2O3to obtain an octane number restorative, wherein the gasoline desulfurization adsorbent comprises 5-50 percent by mass of molecular sieve, 5-80 percent by mass of zinc oxide, 1-30 percent by mass of VIB and/or VIII family non-precious metal and 5-50 percent of other bonding agents; the sulfur storing agent and the octane number restorative can be combined for using by mixing, soaking, performing deposition sedimentation and co-precipitating, and can be used separately; and the absorbent can be used for adsorbing almost all sulfides in gasoline to obtain ultra-low-sulfur even sulfur-free gasoline while the octane number is kept to be constant or be increased slightly.

The invention discloses an adsorption resin with concentrated aperture and larger micro-hole area compared with a superficial area and a preparation method of the adsorption resin. The resin apertures are concentrated and distributed in the area of 1.5-2.5nm; the micro-hole proportion is more than 60%. The preparation method of the resin has the steps as follows: (1) synthesis of narrow distribution micro-hole low crosslinking polystyrene resin; (2) chloromethylation of the narrow distribution micro-hole low crosslinking polystyrene resin under the catalysis of lewis acid catalyst; (3) subsequent crosslinking reaction of chloromethylated low crosslinking polystyrene resin under the catalysis of lewis acid catalyst. The microporosity of the resin prepared by the invention achieves 60-95%; the micro-hole has uniform distribution and has obvious single peak characteristic and obvious separation effect on the organic matters with identical chemical structure type and different molecule sizes, and can be effectively used for disposing and recycling corresponding organic wastewater. The reagent used by the method provided by the invention is relatively simple and easy to buy, and the required equipment is simple and easy.