635results about "Selective adsorption" patented technology

The invention provides an adsorbent capable of simultaneously adsorbing bilirubin and cytokines and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out suspension polymerization reaction on a styrene monomer and a polyvinyl cross-linking agent in a dispersion medium under the action of a continuous multi-component pore-foaming agent and an initiator to prepare polystyrene-based macroporous resin; carrying out chloromethylation reaction on the polystyrene-based macroporous resin to prepare chlorine balls; carrying out post-crosslinking reaction on the chloromethylated beads to prepare the adsorbent capable of adsorbing bilirubin and cytokines at the same time; the continuous multi-component pore-foaming agent comprises a first pore-foaming agent, a second pore-foaming agent and a third pore-foaming agent of which the solubility parameters are gradually increased in sequence; the temperature of the suspension polymerization reaction is adjusted according to the mass fraction of the polyvinyl cross-linking agent in the monomer mixture and the solubility parameter of the continuous multi-component pore-foaming agent, and the monomer mixture is composed of styrene monomers and the polyvinyl cross-linking agent. The bilirubin and cell factors can be adsorbed at the same time, and the safety of blood purification is improved.

The invention relates to the technical field of rare earth element separation methods, in particular to a method for separating ytterbium and lutetium by using a phosphate adsorbent, which comprises the following steps: loading a phosphate solution on a porous solid-phase carrier by using a vacuum impregnation method, and carrying out reduced pressure evaporation and drying to obtain a phosphate solid adsorbent; filling an exchange column with the solid adsorbent to obtain the exchange column filled with the solid adsorbent; enabling a nitric acid solution containing ytterbium and lutetium to flow through an exchange column filled with a solid adsorbent to complete a column adsorption process; and performing elution, performing desorption by using a desorption solution to obtain the regenerated exchange column filled with the solid adsorbent, respectively collecting the ytterbium solution and the lutetium solution, completing the separation process, and repeating the steps. By adopting the steps, the separation of ytterbium and lutetium is directly realized from the nitric acid solution containing ytterbium Yb and lutetium Lu through column adsorption separation, leaching and desorption processes, and high-purity ytterbium and lutetium products are prepared.

A hybrid catalyst for simultaneous dehalogenation and cracking of plastic derived oil includes a plurality of composite particles, wherein each of the composite particles includes red mud particles and beta zeolite particles. A process for upgrading plastic derived oil includes contacting the plastic derived oil with the hybrid catalyst. A system for upgrading plastic derived oil includes an FCC reactor containing the hybrid catalyst.

The invention relates to an adsorbent based on an X molecular sieve and preparation and application thereof, and a preparation method of the adsorbent comprises the following steps: (1) mixing the X molecular sieve with a binder, molding and roasting to obtain a molded body; (2) treating the molded body obtained in the step (1) with an alkali solution to perform in-situ crystallization on the binder in the molded body to obtain a crystallized product; (3) carrying out partial barium ion exchange on the crystallized product obtained in the step (2) by using a barium salt solution, and drying to obtain a dried product; (4) carrying out ammonium ion exchange on the dried product obtained in the step (3) by using an ammonium salt solution, and roasting in a flowing atmosphere to obtain a roasted product; and (5) performing barium ion exchange and optional potassium ion exchange on the roasted product obtained in the step (4), and then drying to obtain the adsorbent. The adsorbent has at least two kinds of mesoporous channels with different apertures, has high barium ion exchange capacity, high adsorption capacity and compressive strength, and shows good adsorption selectivity and mass transfer performance when used for adsorption separation of p-xylene.

The invention discloses a method for deeply separating and extracting gallium, and belongs to the technical field of non-ferrous metallurgy. According to the method for deeply separating and extracting gallium, the problems that an existing adsorption material is generally poor in chemical stability, insufficient in selectivity and adsorption capacity and the like in a gallium-containing solution with high alkalinity and coexistence of multiple components are solved, and the gallium is deeply separated and extracted on the basis of the coordination characteristic of gallate ions. A covalent organic framework adsorption material with a directional recognition site and an ordered pore channel structure is designed and constructed. According to the material, an organic porous framework with high crystallinity and large specific surface area is constructed through dynamic covalent chemistry, and efficient and high-selectivity adsorption of gallate ions can be realized. The method is suitable for efficiently capturing and enriching gallium from a high-alkalinity complex solution, and a reliable technical solution with application prospects is provided for efficient recycling of gallium resources.

The invention provides a rubidium and cesium adsorbent and a preparation method and application thereof. The preparation method comprises the following steps: providing a doped and modified Prussian blue analogue, wherein the Prussian blue analogue comprises a Prussian blue matrix material and a transition metal doping element doped in the Prussian blue matrix material; granulating a mixed material containing the doped and modified prussian blue analogue and a granulating agent to obtain a rubidium and cesium adsorbent precursor; a mixed reaction system containing the rubidium and cesium adsorbent precursor and a surface modifier are subjected to a reaction, the surface modifier contains one or more functional structures of an amino group, a sulfonic group, a carboxyl group, a sulfydryl group, an acryloyloxy group, an epoxy group, a crown ether structure and a calixarene structure, and therefore the rubidium and cesium adsorbent is obtained. Through a multi-aspect synergistic strategy of transition metal doping, granulation and surface modification, the prepared rubidium and cesium adsorbent has good stability and high adsorption capacity, and has strong selectivity to Cs < + > / Rb < + >.

Provided is a method for large-scale preparation of a purified preparation of a recombinant lentiviral vector at the GMP grade. The method comprises: (a) providing raw material feed liquid to be purified that comprises recombinant viral vectors; (b) carrying out a microfiltration treatment on the feed liquid to obtain a microfiltered filtrate comprising the recombinant viral vectors; (c) optionally concentrating the filtrate to obtain a concentrated filtrate; (d) purifying the filtrate obtained in the previous step by means of chromatography to obtain a crude pure product comprising the recombinant viral vectors; and (e) subjecting the crude pure product obtained in the previous step to liquid exchange and elaborate purification to obtain the purified recombinant viral vectors.

The present application relates to a kind of methods for separating actinium from irradiated thorium target, belong to medical radioisotope manufacturing technical field, solve the problem that thorium element and lanthanide element impurity content in final actinium product in prior art is higher.The present application discloses a kind of methods for separating actinium from irradiated thorium target, first, irradiated thorium target is dissolved, then using cation exchange resin column, UTEVA or TK200 resin extraction column, DGA resin extraction column, LN resin extraction column four-stage series separation purification process, obtain final actinium product.Actinium is efficiently and selectively recovered, and the thorium element and lanthanide element impurity content in final actinium product is significantly reduced.

A separation device comprising a plurality of shaped particles. Each shaped particle comprising a first major surface defined by a first perimeter having at least three edges, a second major surface defined by a second perimeter having the same number of edges as the first perimeter, and a peripheral surface comprising a plurality of walls disposed between the first and second major surfaces. The peripheral surface intersects the edges of the first and second perimeters and the average radius of curvature at the intersections is no greater than 50 micrometers. The length of the particle is no greater than 5 millimeters and the length of the particle is at least 2 times greater than the thickness of the particle. Each of the plurality of shaped particles is substantially the same size.

The invention relates to the technical field of blood purification materials, in particular to a zirconium-titanium bimetal MOF hollow microsphere adsorbent and a preparation method and application thereof. The adsorbent is based on a Zr / Ti bimetallic node and a phosphonic acid-carboxylic acid mixed ligand, a composite MOF hollow microsphere structure with high stability and high specific surface area is constructed through a solvothermal and polymerization synergistic reaction in a water-in-oil suspension system, a phosphonic acid group and Zr are strongly coordinated to improve the stability of a framework, and the composite MOF hollow microsphere structure has a high specific surface area. The carboxylic acid group keeps the hydrophilicity of the pore channel; meanwhile, a cross-linked network of acrylamide and N, N '-methylene bisacrylamide penetrates through crystal gaps in the balling process, so that the material has excellent mechanical strength and fluid stability; and a sulphobetaine amphoteric polymer brush layer is constructed on the surface of the MOF through endogenous initiation point modification and surface in-situ controllable free radical polymerization technologies, so that protein adsorption and platelet adhesion are effectively inhibited, the blood compatibility is remarkably improved, and meanwhile, the channel accessibility is maintained to promote rapid diffusion and adsorption of bilirubin.

To extend the lifespan of plating baths used for forming metal oxide films and to enable more efficient use of the plating baths. [Solution] The method for forming a metal oxide film comprises the steps of forming a metal oxide film on the surface of a plated object using a plating bath containing a metal compound that forms the film and a boron compound that acts as a reducing agent, and regenerating the plating bath using an adsorption filter that adsorbs boric acid.

The invention discloses imprinted resin, a preparation method thereof and application of the imprinted resin in platinum recovery. The preparation method of the imprinted resin comprises the following steps: S1, carrying out nucleophilic substitution reaction on chloromethyl polystyrene resin and N-(2-mercaptoethyl) acrylamide in a solvent, and collecting the resin after the reaction is finished; s2, adding a chloroplatinic acid solution into the resin obtained in the step S1, and carrying out a coordination reaction; s3, adding a cross-linking agent and an initiator into the system obtained in the step S2, carrying out polymerization reaction, and collecting resin after the reaction is finished; and S4, adding an eluent into the resin obtained in the step S3, and desorbing chloroplatinic acid radical ions to obtain the imprinted resin. The imprinted resin provided by the invention has high selectivity, high adsorption capacity and good regeneration performance on chloroplatinic acid radical ions, and is suitable for efficient recovery and resource utilization of platinum.

The invention discloses preparation of a nitrogen-rich ionic organic single crystal material and application of the nitrogen-rich ionic organic single crystal material in iodine adsorption, and belongs to the technical field of functional materials and radioactive pollutant treatment. The material is formed by self-assembly at room temperature through a solution method by taking biphenyl tetracarboxylic acid tetrabutylamine as an anion ligand and tetra (4-ethyl pyridine phenyl) ethylene bromide or tetra (4-imidazole phenyl) ethylene bromide as a cation ligand. The method is simple in preparation process, mild in condition and high in yield. The skeleton of the obtained material is rich in nitrogen sites and has a large cavity, the material shows extremely high adsorption capacity and rapid adsorption kinetics for iodine in a gas phase and a liquid phase, the maximum adsorption capacity of the material for iodine steam reaches up to 5.16 g / g, the retention rate of 95% or above can still be kept within 7 days after adsorption, and the material has good recycling performance. The material provides a novel and reliable solution for efficiently capturing and fixing radioactive iodine, and has a wide application prospect in the field of nuclear waste treatment.

The invention relates to a method for efficiently synthesizing a lithium difluoro bis (oxalate) phosphate solid in a continuous flow reactor, and belongs to the field of environmental protection. The method comprises the following steps: firstly, feeding a lithium hexafluorophosphate solution and a lithium oxalate solution into a static mixing module of a continuous flow reactor for mixing; then entering a reaction module of the continuous flow reactor for reaction; after the reaction is finished, the material enters a separation module of a continuous flow reactor, and after membrane separation, crude lithium difluorobisoxalato phosphate is obtained through a modified ceramic membrane adsorbent; washing the crude lithium difluoro-bis (oxalate) phosphate with absolute ethyl alcohol, and performing vacuum drying to obtain a lithium difluoro-bis (oxalate) phosphate solid; the modified ceramic membrane adsorbent is prepared from an aluminum oxide-zirconium oxide composite ceramic membrane, DMF (Dimethyl Formamide), water, isocyanate 1-trimethoxysilyl methyl ester, 3, 5-dihydroxyphenylboronic acid and stannous octoate. The lithium difluoro-bis (oxalate) phosphate prepared by the method is high in purity and high in yield, and meets the requirements of high-end lithium batteries.

The present invention relates to an X molecular sieve-based adsorbent. The adsorbent comprises at least 92 wt% of an X molecular sieve, and has a micropore volume of 0.18-0.30 mL / g and a mesopore volume of 0.01-0.1 mL / g. A pore size distribution curve of the adsorbent shows at least two mesopore distribution peaks, wherein the most probable pore size corresponding to one mesopore distribution peak ranges from 3.0 to 9.0 nm, and the most probable pore size corresponding to the other mesopore distribution peak ranges from 10.0 to 19.0 nm. The present invention further relates to a preparation method for the adsorbent, a use of the adsorbent, and a device comprising the adsorbent.

The invention is applicable to the technical field of metal organic framework materials, and provides a pillararene-based metal organic framework material and a preparation method thereof.The pillararene-based metal organic framework material takes a compound PY2-P5 as a ligand, and the material is one of PMOF1, PMOF2 and PMOF3; the PMOF1 is of a Cu4I4 cubic tetramer structure; the PMOF2 is of a Cu4I4 ladder tetramer structure, and the Cu4I4 ladder tetramer structure is a And the PMOF3 has a CuI one-dimensional chain structure. By introducing the pillararene ligand and regulating and controlling the coordination mode of the pillararene ligand and cuprous iodide, the metal organic framework material with stable structure and functional characteristics is constructed, the metal organic framework material has the dual advantages of host recognition site and fluorescence signal response, and can selectively distinguish 1-bromoalkane and 2-bromoalkane; a remarkable fluorescent blue shift signal is shown in the adsorption process, so that the visualization of molecular recognition and sensing is realized; the excellent molecular recognition capability of pillararene is maintained, the stability and reusability of the material are improved through framing, and a new way is provided for selective detection and separation of volatile organic compounds.

The invention relates to the field of impurity separation, and discloses a method for separating impurities in a liquid phase and application, the method comprises the following steps: (1) contacting a liquid-phase raw material with an adsorbent for adsorption to obtain a liquid-phase material flow; the liquid-phase raw material comprises an organic liquid hydrogen storage substance and impurities; the adsorbent preferentially adsorbs impurities in the liquid-phase raw material; (2) carrying out back-flushing desorption on the adsorbent by using part of the liquid-phase material flow to obtain a desorption solution; based on the total mass of the desorption solution, the impurity content in the desorption solution is 2-5%; (3) feeding the desorption liquid into a rectifying tower, carrying out rectification separation, and outputting the obtained tower bottom distillate and the residual part of liquid phase material flow as products; and (4) regenerating the adsorbent after backwashing desorption. The method has the characteristics of high purity of the organic liquid hydrogen storage substance, low cost and no introduction of new impurities.

The invention discloses a chloroethylene carbonate purification process in the technical field of synthesis of lithium battery additives. The process adopts a novel hierarchical pore asymmetric zirconium organic phosphonate frame material as an adsorbent. The method comprises the following steps: firstly, mixing, heating and stirring crude chloroethylene carbonate and absolute methanol, and standing at room temperature for pretreatment; performing selective adsorption on the pretreatment solution through an adsorption column filled with the adsorption material; carrying out toluene washing, citric acid ethanol solution treatment and supercritical carbon dioxide extraction on the saturated material to realize regeneration; and finally, rectifying the solution subjected to adsorption treatment under a reduced pressure condition to obtain a high-purity product. The adsorption material is prepared through multiple steps of reactions including synthesis and modification of an organic ligand, framework construction of a zirconium source and a phosphonic acid ligand, asymmetric functional modification of the surface of the material, and final thermal activation and hydrophobic stabilization treatment. The process is simple and efficient, the material can be reused, and the method is especially suitable for the field of lithium battery additive synthesis.

A method of separating and purifying a mixed stream of contaminated reclaimed polyethylene and contaminated reclaimed polypropylene is provided. The method comprises the steps of extraction, dissolution, settling, purification, and solvent separation to produce separate streams of purified recycled polyethylene and purified recycled polypropylene. Both separate streams are produced in the same production plant operating in swing mode, and have virgin-like optical properties.

This invention provides a system and method for removing high and low boiling points in polysilicon production. The system includes a first distillation column comprising a top rectifying section, a bottom stripping section, and a separation section between the rectifying and stripping sections, all of which are sequentially interconnected. The separation section includes a pre-fractionation section and a main fractionation section arranged side-by-side but not interconnected. The main fractionation section includes, from top to bottom, a first main fractionation section and a second main fractionation section that are interconnected. The pre-fractionation section has a low-boiling material inlet, the stripping section has a bottom outlet, and the first main fractionation section has a first outlet. The outlet of the disproportionation fixed-bed reactor is connected to the low-boiling material inlet. The second distillation column has a high-boiling material inlet and a top outlet, and the bottom outlet of the stripping section is connected to the high-boiling material inlet. The first outlet and the top outlet of the second distillation column are respectively connected to an adsorption column.

To provide an adsorbent having excellent adsorption properties, with reduced elution of iron.SOLUTION: An adsorbent includes a porous carbide and iron. The organic carbon content in the carbide is 30% or more and 85% or less. The adsorbent includes a porous carbide and iron, and has a specific surface area of 100 m2 / g or more and 500 m2 / g or less. The adsorbent includes a porous carbide and iron, and has a total pore volume of 1000 mm3 / g or more and 3000 mm3 / g or less. The adsorbent includes a porous carbide and iron, and has an iron content of 5% or more and 35% or less.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of insulating oil production, in particular to a decoloring treatment device for insulating oil production. The device is reasonable in structural design and mainly comprises the treatment box, the annular filter box, the first stirring mechanism, the second stirring mechanism, the backflow pipe and the backflow pump, the annular filter box is used for loading granular adsorbents, the density of the granular adsorbents is equivalent to that of insulating oil, the granular adsorbents can suspend in the insulating oil, automatic dispersion is achieved, and the service life of the granular adsorbents is prolonged. The first stirring mechanism is used for stirring oil in the hollow area and the lower area of the annular filter box, the second stirring mechanism is used for stirring the lubricating oil and the granular adsorbent in the annular filter box, and the backflow pipe can be used for circularly transferring the lubricating oil on the bottom layer to the top layer; in this way, full contact between the insulating oil and the granular adsorbent can be guaranteed, and the granular adsorbent after adsorption saturation can be periodically updated.

This invention discloses a covalent organic framework material for selective solid-phase adsorption and separation, its preparation method, and its applications. The material is prepared by polycondensation reaction of electron-deficient triazine rings with short-chain linkers such as hydrazine hydrate, forming a layered structure with a high specific surface area of ​​602 m² / g and a concentrated pore size of 2.0 nm to 3.0 nm. This structure exhibits high adsorption capacity (up to 1.0 mg / g), rapid adsorption kinetics, and excellent selectivity for PAHs in organic solutions through strong π-π interactions and pore confinement effects. The preparation process is simple and the conditions are mild. The material has good thermal stability (>300℃), and its performance retention rate is higher than 92% after 5 cycles. When applied to the solid-phase adsorption of PAHs in petroleum products such as lubricating oil and white oil, it effectively eliminates matrix interference, allowing direct analysis without complex purification steps after adsorption. This overcomes the limitations of traditional materials such as silica gel and activated carbon, which have weak adsorption capacity and require cumbersome post-treatment, providing a new high-performance adsorption material solution for the efficient detection of trace PAHs in petroleum products.

This invention discloses a magnetic nano-silica, its preparation method, and its application in the enrichment of low-abundance proteins. The proposed method for preparing magnetic silica, while preserving the surface properties of silica and maintaining its protein adsorption capacity, also imparts magnetism; providing a simpler, faster, and more efficient technique for large-scale sample processing. The low-abundance protein enrichment based on magnetic nano-silica proposed in this invention can be applied to almost all sample types, effectively solving the interference caused by high-abundance proteins on the identification of low-abundance proteins during mass spectrometry detection, and increasing the number of identified proteins by 100%-700%.

The invention provides battery-grade lithium carbonate generation equipment and a brine multi-salt fractional crystallization and co-production process, and relates to the technical field of battery-grade lithium carbonate preparation, the battery-grade lithium carbonate generation equipment comprises a bottom plate, a treatment tank, a driving mechanism and a transmission mechanism; the treatment tank is mounted on the upper surface of the bottom plate, a first top cover is mounted at the top of the treatment tank, and a mounting cover is mounted at the top of the first top cover; and the driving mechanism comprises a mounting frame mounted on the upper surface of the first top cover. According to the scheme, when stirring enters a later stage, lithium-containing brine in a treatment tank is converted into lithium carbonate slurry, the diameter of the driving end and the diameter of the driven end of a steel belt are mutually converted, at the moment, stepless speed change can be achieved, and the diameter of the driving end of the steel belt is decreased; meanwhile, different stirring speeds can be freely matched according to different states of the lithium carbonate slurry, the stirring generation effect of the lithium carbonate slurry can be effectively improved, and it can be guaranteed that subsequent battery-grade lithium carbonate preparation is more stable.

To provide a method for efficiently separating a metal atom, which is a substance to be separated, from a liquid containing the substance to be separated and an organic solvent. More specifically, a method for separating a substance to be separated from a liquid containing the substance to be separated and an organic solvent using poly(arylene sulfide) resin (PAS) particles, characterized in that the method includes bringing the liquid containing the substance to be separated and the organic solvent into contact with the PAS particles to allow the substance to be separated contained in the liquid to be selectively adsorbed to the PAS particles and to be removed from the liquid, the PAS particles and the liquid do not contain water, and the substance to be separated is a compound containing a metal atom, where the metal atom is not an unreacted raw material or a by-product of polymerization reaction of the PAS.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastic via the polymerization of dienes prior to further treatments.

The invention discloses a process for preparing functional master batch from waste textile recycled polyester, which comprises the following steps: S1, crushing waste polyester fabric into small fabric materials, and aggregating to obtain foam materials; s2, carrying out pre-alcoholysis on the soaked material, and filtering for the first time to obtain a pre-alcoholysis product; s3, carrying out total alcoholysis on the pre-alcoholysis product, and filtering for the second time to obtain an alcoholysis product; s4, carrying out adsorption treatment on the alcoholysis product, and carrying out pre-polycondensation to obtain an oligomer melt; s5, filtering the oligomer melt for the third time, and performing final polycondensation to obtain a final polycondensation melt; and S6, the final polycondensation melt is filtered for the fourth time, functional powder is added, uniform mixing, pelletizing, packaging and discharging are conducted, the regenerated functional master batch with more comprehensive performance and more stable quality is finally obtained, and recycling of the waste polyester textiles is achieved.