75 results about "Macroporus" patented technology

The invention relates to the technical field of alumina material preparation, in particular to macroporous pseudo-boehmite and a combined preparation method thereof. The preparation method comprises the following steps: carrying out neutralization reaction on carbon dioxide and a sodium aluminate solution to obtain neutralized slurry; performing first aging treatment on the neutralized slurry to obtain first aged slurry; filtering the first aged slurry to obtain a solid-phase material and a liquid-phase material; sequentially washing and drying the solid-phase material to obtain a first macroporous pseudo-boehmite product; aluminum sulfate and the sodium aluminate solution are subjected to parallel flow neutralization, and aluminum hydroxide slurry is obtained; mixing the aluminum hydroxide slurry with the liquid-phase material, and then carrying out second aging treatment to obtain second aged slurry; performing post-treatment on the second aged slurry to obtain a second macroporous pseudo-boehmite product; and collecting the two macroporous pseudo-boehmite products in batches. According to the preparation method, pseudo-boehmite with different pore structure characteristics is respectively prepared through two neutralization technologies based on three mechanisms of staged treatment, material recycling and structure complementation.

The utility model discloses a separation and purification device based on macroporous resin, and relates to the technical field of separation and purification, the separation and purification device based on macroporous resin comprises a chromatographic column, the chromatographic column is provided with a chromatographic structure convenient for separation and purification, the chromatographic structure comprises a feed port, a fixed base and a circular truncated cone flow guide ring, the feeding hole is fixedly formed in the upper end part of the chromatographic column, the fixed base is positioned at the lower end part of the chromatographic column, each circular truncated cone flow guide ring is positioned on the inner side wall of the chromatographic column, an adjusting valve is arranged at the lower end part of the chromatographic column, and two column mounting grooves are formed in the upper end part of the feeding hole. The chromatographic column is arranged to purify anthocyanin, the purity of the obtained anthocyanin is higher than that of unpurified anthocyanin, toxic organic solvents are avoided in the whole process, only ethyl alcohol is used, environment friendliness is achieved, resin can be repeatedly used, and the production cost is reduced.

The invention relates to the technical field of resin preparation, in particular to macroporous weak-base anion exchange resin as well as a preparation method and application thereof. The crosslinked styrene-divinylbenzene microsphere matrix obtained by a preparation process of regulating and controlling the crosslinked styrene, the divinylbenzene and the pore-foaming agent and adding the crosslinking agent has the advantages of high mechanical strength, controllable specific surface area, adjustable pore diameter and the like. A macroporous weak base anion exchange resin; according to the method, the total exchange capacity reaches 4.8 mmol / g or above, the resin sphericity in the fatigue strength of 100 cycles is 90% or above, the resin sphericity in the fatigue strength of 300 cycles is 70% or above, the treatment volume ratio (BV) in the first cycle in the xylose decolorization process is 80 or above, and the purposes of improving the resin quality, reducing the environmental pollution and improving the energy efficiency ratio can be achieved.

The invention discloses a macroporous distribution plate with a three-dimensional structure, which is arranged between a first-section regenerator and a second-section regenerator and comprises a distribution plate and a cylindrical hollow cylinder, the distribution plate is a partition plate of the first-section regenerator and the second-section regenerator, and a cylindrical hollow barrel is arranged in the center area of the distribution plate and is perpendicular to the distribution plate; the top of the hollow cylinder is closed, and the bottom is connected with the first-section regenerator; and holes are formed in the side wall of the cylinder. The problem of distribution of catalysts and flue gas from the first-section regenerator to the second-section regenerator is solved, fluidization of a second-section regeneration turbulent bed is stable, the transfer coefficient of excess oxygen in the flue gas of the first-section regenerator is increased, tail combustion of the flue gas in a dilute-phase space can be effectively controlled, and a new scheme is provided for an in-service device to solve the tail combustion problem.

The invention discloses a preparation method of water-resistant macroporous spherical silica gel, and belongs to the technical field of inorganic material preparation. The preparation method comprises the following steps: preparing gel balls by taking water glass and sulfuric acid as raw materials through an air granulation method, namely a wet gel initial product, and performing drying, alkali treatment and secondary drying on the wet gel initial product to obtain the water-resistant macroporous spherical silica gel. The initial spherical silica gel is prepared by adopting a relatively mature industrial method at present, and then the adsorption rate of the silica gel to water is slowed down through post-treatment modification, so that the silica gel does not crack when encountering water. In addition, the product has large pore volume and pore diameter, and can be widely applied to preparation of a supported catalyst by an impregnation method.

A process for preparing a macroporous material comprising an active phase comprising a potassium phosphate salt and / or a cesium phosphate salt and a support comprising α-SiC silicon carbide and silica comprising the following steps: a) contacting a colloidal silica sol with a powder of a potassium and / or cesium phosphate salt to obtain a suspension; b) adding a powder of precipitated silica, a powder of α-SiC silicon carbide and a solvent to obtain a paste; c) shaping the paste to obtain a material precursor; d) drying the material precursor at a temperature between 15°C and 250°C; e) calcining the dried material precursor obtained at the end of step d) at a temperature above 250°C and below or equal to 1200°C.

The present invention relates to a catalytic cracking catalyst, comprising: 5-40 wt% of a molecular sieve, 5-40 wt% of clay calculated on a dry basis, 5-35 wt% of a silicon species calculated on the basis of SiO2, 30-75 wt% of an aluminum species calculated on the basis of Al2O3, 0.5-15 wt% of a stabilizing element calculated on the basis of an oxide, and 0.5-10 wt% of an activity-modifying element calculated on the basis of an oxide. The content ratio of the silicon species to the aluminum species is 0.05-2 calculated on the basis of the molar ratio of SiO2 / Al2O3. The stabilizing element is selected from at least one of group IIIB elements and group IVB elements, and the activity-modifying element is selected from at least one of Mg and P; or the stabilizing element is selected from Mg, and the activity-modifying element is selected from at least one of P, B, Fe, group IIIB elements, and group IVB elements. The present invention further relates to a method for preparing the catalytic cracking catalyst and a heavy oil catalytic cracking method.

The microporous noise-reducing aerogel coating material is prepared from the following raw materials in parts by weight: 100 to 110 parts of tetraethoxysilane, 1 to 2.5 parts of hydrophilic emulsifier, 5 to 10 parts of pore-foaming agent, 0.5 to 2 parts of initiator, 30 to 40 parts of functional monomer, 5 to 10 parts of cross-linking agent and 2 to 3 parts of lipophilic emulsifier. According to the invention, a hierarchical pore structure from micron to nanoscale is constructed in situ through a one-step method. In the gelation and drying processes, the interface of the emulsion drops is used as a template to guide and form a macroporous skeleton; meanwhile, through a sol-gel process of a silicon source and volatile / reactive pore forming of an organic phase, mesoporous and microporous structures are formed in pore walls. And finally, a three-dimensional through'macropore-mesopore-micropore 'hierarchical pore structure is formed.

This application relates to the field of catalyst support technology, specifically disclosing a macroporous high-strength activated alumina and its preparation method. The preparation method of the macroporous high-strength activated alumina includes the following steps: adding organosilane to a pseudo-boehmite slurry with a solid content of 10-25%, reacting at 50-80℃ and pH 7-9 for 1-4 hours to obtain a modified slurry; filtering and drying the modified slurry to obtain a dry gel; mixing the dry gel with guar gum powder, nitric acid, polyethylene glycol 400, and water, and extruding it into strips, then drying at 100-120℃ for 4-8 hours to obtain a molded product; heating the molded product to 500-650℃ and holding at that temperature for 2-5 hours, then naturally cooling to obtain the high-strength macroporous activated alumina support. The activated alumina obtained in this application possesses both macroporous volume and high strength.

The invention relates to a method for extracting components for treating gout in a sunflower disk, which improves the yield of a solid extract by improving the macroporous resin elution step, and in the extracted solid extract, the contents of effective components such as rutin, caffeic acid and 6-methylcoumarin for treating gout are obviously increased.

The utility model relates to the technical field of dehydration equipment, and provides macroporous ion exchange resin dehydration equipment which comprises a shell, a supporting block is installed on the surface of the shell, a supporting column is installed at the bottom end of the supporting block, a falling groove is formed in the surface of the shell, a discharging opening is formed in the left side of the shell, a side block is installed on the left side of the shell, and a discharging opening is formed in the right side of the shell. The bottom end of the side block is provided with a slag discharging opening, the right side of the shell is provided with a motor, the output end of the motor is provided with a rotating rod, efficient stirring and dewatering processes are achieved, the treatment speed is increased, and the feeding opening is provided with a hopper, a limiting plate, a cover plate and other assemblies, so that material adding is facilitated, and the stirring effect is improved; the safety and the sealing performance of the equipment are enhanced, the filtering process is smoother and easy to clean and replace due to the sliding connection design of the filter screen and the fixing plate, and on the whole, the equipment is excellent in the aspects of improving the production efficiency, reducing the maintenance cost and enhancing the operation safety.

The present invention relates to a putty formulation suitable for use as a bone void filler. The putty formulation comprises granules comprising a macroporous cement composition comprising hydroxyapatite and β-calcium pyrophosphate. The porosity of the composition is 60-80 vol%, the average particle size of the granules is 50-800 µm, and the portion of granules in the putty formulation is 25-50 wt%.

The application belongs to the technical field of membrane separation, and discloses a method for preparing CAU-10-H membranes for gas separation by modifying a macroporous tubular carrier with aluminum sulfate, in particular to the following steps: firstly, preparing a proper aluminum sulfate solution, then introducing the aluminum sulfate solution into the carrier by means of hot dipping, and then calcining the carrier with the introduced solution by programmed temperature rising, so that the smoothness of the surface of the modified carrier is significantly improved; and due to the introduction of aluminum sulfate on the surface of the carrier, the aluminum-based CAU-10-H membrane can be crystallized into a film on the macroporous micron-sized carrier. The dense CAU-10-H membrane prepared on the macroporous carrier by the method of modifying the carrier with aluminum sulfate has good separation performance for H2 / CO2 gas.

The invention relates to the technical field of biological catalysis, in particular to a preparation method and application of a co-immobilized enzyme based on macroporous resin adsorption-chitosan membrane coating, and the preparation method mainly comprises the following steps: pretreating resin, adding glucose oxidase and catalase, fully adsorbing, and coating with a chitosan membrane to obtain the co-immobilized enzyme, the method can be used for producing gluconic acid. The co-immobilized enzyme prepared by the invention has the characteristics of adaptation to low-pH production, high enzyme activity retention rate and the like.

The invention discloses a supporting skirt for a macroporous distribution plate. The supporting skirt comprises a cylindrical skirt, a conical skirt, a metal protection layer and a heat insulation layer, the upper end of the cylindrical skirt is connected with the macroporous distribution plate, and the lower end of the cylindrical skirt is connected with the conical skirt; the lower end of the conical skirt is connected with the inner wall of the top of the regenerator barrel; heat insulation layers are arranged inside and outside the skirt; and the heat insulation layer is fixed on the skirt by the metal protection layer. According to the invention, a cylindrical and conical skirt combined structure is adopted, and the conical skirt is rooted on the cylinder at the lower end of the regenerator instead of the transition section of the small cone section of the regenerator, so that the height of the skirt of the macroporous distribution plate is not limited by the height of the cone of the regenerator any more, the required height of the skirt can be conveniently realized, and the temperature gradient of the skirt is small enough; the extrusion and breakage of the wear-resistant nozzles arranged on the pore plate caused by the deformation of the macropore distribution plate due to temperature difference deformation are greatly relieved, the failure of a welding seam at the support skirt is also avoided, meanwhile, the field installation is facilitated, and the installation quality is ensured.

This invention discloses a method for extracting limonin, comprising the following steps: S1, preparing an extract containing limonin; S2, adding macroporous resin to the extract and stirring, the macroporous resin being used to adsorb limonin in the extract; S3, removing the macroporous resin from the extract and placing it in a chromatography column to collect the eluent; S4, evaporating and concentrating the eluent to obtain a limonin extract, using ethyl acetate as a washing solvent, ultrasonically dissolving the limonin extract, then adding pure water for washing, concentrating and evaporating the washing solution to obtain a limonin sample; S5, performing TLC directional analysis on the limonin sample to check whether the limonin sample is qualified. This invention improves the extraction rate of limonin and yields a high extraction content.

The invention discloses a preparation method of a macroporous magnesium-aluminum composite material, and belongs to the technical field of chemical engineering, and the method comprises the following steps: preparation of magnesium-aluminum sol, preparation of a first solution, preparation of a magnesium-aluminum dry gel film, preparation of a macroporous magnesium-aluminum composite material precursor and preparation of the macroporous magnesium-aluminum composite material. According to the invention, the alumina matrix is subjected to magnesium-aluminum coating modification, the pore structure of the magnesium-aluminum composite material is optimized, the surface acid-base property of the adsorbent material is improved by combining the modification of the organic ligand, and the adsorption selectivity of water vapor is greatly reduced while the structural stability of the material is ensured; the carbon dioxide can be efficiently captured in a high-water-vapor environment (such as air). The invention also discloses the macroporous magnesium-aluminum composite material prepared by the preparation method. Meanwhile, the invention further discloses application of the macroporous magnesium-aluminum composite material in the field of adsorption.

The invention discloses a method and system for recycling HMX and RDX through macroporous adsorption resin, and belongs to the technical field of environmental remediation. The method comprises the following steps that the macroporous adsorption resin with set physicochemical properties is selected; the method comprises the following steps: adding macroporous adsorption resin into IM tail water containing HMX and RDX, and carrying out adsorption reaction under set conditions; after adsorption is completed, resin saturated in adsorption is separated from the waste liquid obtained after adsorption, then the resin saturated in adsorption is treated with a desorption agent, and resin obtained after desorption and a solution containing HMX and RDX are obtained; the desorbed resin is put into IM tail water containing HMX and RDX again for adsorption, the adsorption-desorption process is repeated, and circulation is carried out for multiple times; and distilling and drying the solution containing HMX and RDX obtained by adsorption-desorption to obtain HMX and RDX solids. According to the method, through cyclic adsorption-desorption operation, HMX and RDX can be effectively enriched, the recovery efficiency is improved, pollution of pollutants to the environment is reduced, and the method conforms to the sustainable development concept.

The invention provides a process optimization method for purifying emodin through macroporous resin, and belongs to the technical field of chemical purification processes. The method comprises the following steps: respectively mixing different pretreated macroporous resins with an emodin adsorbate solution, carrying out adsorption under a static test condition until saturation, carrying out chromatographic analysis on the solutions before and after adsorption, and calculating an interaction mechanism between emodin and the macroporous resins by adopting a molecular docking technology, molecular dynamics and binding energy. Screening to obtain macroporous resin with the best adsorption effect and purification conditions; the method comprises the following steps: adsorbing to be saturated by adopting macroporous resin with an optimal adsorption effect and an emodin adsorbate solution under a dynamic adsorption condition, firstly washing impurities with water, then desorbing with ethanol to obtain an eluent, and concentrating and crystallizing the eluent to obtain the high-purity emodin. The purity of the purified emodin reaches up to 99.8%, and an efficient, simple, convenient and stable method is provided for obtaining of high-purity emodin and industrial large-scale production of emodin.

The invention discloses a macroporous alumina carrier as well as a preparation method and application thereof. The preparation method comprises the following steps: step 1, uniformly mixing isobutylene-maleic anhydride copolymer powder, ammonium bicarbonate crystal powder, hydrated alumina, kaolin and cellulose; and step 2, mixing and kneading the mixture obtained in the step 1 and water, forming, drying and roasting to obtain the large alumina carrier. The macroporous residual oil hydrogenation protective agent carrier prepared by the method has abundant macropores from hundred nanometers to micron and has high mechanical strength.

The invention discloses a molded macroporous carbon material with high basic group content and a preparation method thereof. The basic group content of the molded macroporous carbon material with high basic group content is 0.75-1.15 mmol / g, the area proportion of 0.5-30 [mu] m channels in unit area is greater than 80%, and the proportion of 7.5-15 [mu] m channels in the 0.5-30 [mu] m channels is greater than 60%. The preparation method comprises the following steps: (1) uniformly mixing flour and an alkaline substance, grinding, adding a proper amount of distilled water into the mixed material, kneading into a plastic body, and extruding into strips; (2) directly putting the formed material in the step (1) into a closed container for heat treatment, and drying the treated material; and (3) putting the material obtained in the step (2) into a tubular furnace, and carrying out second-stage carbonization under the protection of an inert atmosphere to obtain the carbon material. The carbon material provided by the invention has the advantages of higher basic group content and micron-sized macroporous channel content, high mechanical strength, good wear resistance, simple preparation process and environmental friendliness, and can be widely used in the fields of adsorption materials, catalysts, catalyst carrier materials, electrode materials, hydrogen storage materials and the like.

This invention provides a method for constructing ordered porous organic crystalline materials based on templates. This method utilizes supramolecular interactions such as hydrogen bonding, halogen bonding, and π-π interactions to successfully construct ordered porous structures, particularly ordered macroporous structures. This method innovatively solves the problem of achieving large-sized (diameter greater than or equal to 50 nanometers) ordered permanent pores in traditional (hydrogen-bonded) organic crystalline materials, while ensuring the material's excellent stability and ordered macroporous properties. The ordered porous (especially ordered macroporous) (hydrogen-bonded) organic crystalline materials constructed by this invention, due to their unique structure and properties, are expected to show broad application prospects in catalysis, biomedicine, and other fields.

The application discloses a method for preparing high-purity theaflavins by using macroporous resin columns in combination, and belongs to the technical field of food engineering. A crude theaflavins solution with a purity of 15-30% is added to an LX-20B resin column, gradient elution is carried out according to a specific procedure, and after the eluate is concentrated by rotary evaporation and / or freeze-drying, a first-purification product is obtained; the first-purification product solution is added to an AB-8 resin column, gradient elution is carried out according to a specific procedure, and after the eluate is concentrated by rotary evaporation and freeze-drying, a high-purity theaflavins product with a purity of 95% or above is obtained, so that the demand for high-purity theaflavins in some high-end health product and medical research and development fields can be met, and the application range of theaflavins is widened.

The invention belongs to the technical field of pseudo-boehmite production, and particularly relates to macroporous pseudo-boehmite as well as a preparation method and application thereof. The preparation method of the macroporous pseudo-boehmite comprises the following steps: mixing crushed bauxite with alkali liquor, and carrying out dissolution reaction and silicon removal treatment to prepare a sodium aluminate solution; and introducing the CO2 micro-nano bubble suspension into a sodium aluminate solution to carry out gas-liquid reaction, filtering, washing and drying to obtain the macroporous pseudo-boehmite. According to the method, the unique physicochemical characteristics of micro-nano bubbles are exerted, the gas-liquid reaction process is enhanced, the reaction rate and the mass transfer efficiency are improved, the pore structure of the product is accurately controlled, and the high-quality macroporous pseudo-boehmite with the specific surface area larger than or equal to 300 m < 2 > / g, the average pore diameter larger than or equal to 10 nm, the pore volume larger than or equal to 1.0 cm < 3 > / g and uniform pore diameter distribution is prepared. The strict requirements of different industries such as catalysts, adsorption materials and ceramic materials on the high-performance macroporous pseudo-boehmite are met.

The application belongs to the technical field of biotechnology, and particularly relates to a method for extracting crude urokinase based on macroporous resin. The method significantly improves the specific activity and shelf life of the crude urokinase through a dynamic pH segmentation protection technology. In the process of lectin affinity chromatography, the high flow rate condition of the first stage pH 8.5-9.5 ensures the efficient and specific binding of urokinase and lectin, and the rapid removal of impure proteins; the dynamic adjustment of the second stage pH from 8.5-9.5 linearly to 7.5-8.5 in combination with low flow rate operation provides a mild microenvironment for urokinase molecules, effectively protecting the integrity of the sugar chain structure of the molecules. The added polyol and disaccharide complex protective agent can stabilize the protein conformation, prevent sugar chain degradation and modification, and reduce the impact of pH mutation on the protein structure. The addition of the complex protective agent further enhances the stability of the sugar chain structure, preventing enzymatic and chemical degradation during the chromatography process.

A process for the selective hydrogenation of gasoline containing polyunsaturated compounds and light sulfur compounds is disclosed, in which the gasoline, together with hydrogen, is contacted with a catalyst comprising a Group VIB metal, a Group VIII metal, and a mesoporous and macroporous alumina support having a bimodal mesopore distribution: the volume of mesopores having a diameter of 2 nm or more and less than 18 nm corresponds to between 10 and 30 volume % of the total pore volume of the support; the volume of mesopores having a diameter of 18 nm or more and less than 50 nm corresponds to between 30 and 50 volume % of the total pore volume of the support; and the volume of macropores having a diameter of 50 nm or more and less than 8000 nm corresponds to between 30 and 50 volume % of the total pore volume of the support.

The application discloses a treatment method of uranium-containing waste liquid. The treatment method comprises the following steps: passing the uranium-containing waste liquid through a macroporous chelating resin to obtain adsorbed resin; wherein a functional group is modified on the macroporous chelating resin, and the functional group is an amino carboxylic acid; wherein the uranium concentration in the uranium-containing waste liquid is 5-30 g / L, and the nitric acid concentration is 3-7 mol / L. The treatment method can effectively reduce the uranium content in the waste liquid.