46results about How to "Preferential adsorption" patented technology

The invention discloses a carbon molecular sieve for concentrating and extracting CH4 from coal bed gas and a preparation method thereof. The method comprises the following steps of: (1) mixing micro-powder phenolic resin waste, a bonder and water and performing extrusion forming to obtain a material strip; (2) carbonizing the material strip to obtain a carbonized material; and (3) adjusting the pores of the carbonized material by using a pore adjuster to obtain the carbon molecular sieve. The invention further provides a carbon molecular sieve prepared by the method. The carbon molecular sieve can be used for separating CH4/N2 mixed gases. The preparation method which uses the phenolic resin industrial waste as a raw material has the advantages of environmental friendliness, wide source and low cost, and meanwhile is relatively simple in process and easier to industrialize and ensure the stable quality of products. The carbon molecular sieve product prepared by the invention has a remarkable CH4/N2 separating performance, and absorbs N2 preferably. The product gas is directly enriched and recovered at the top of the tower, so that the operating cost of pressure swing adsorption can be lowered.

The invention provides multifunctional catalytic cracking strengthening additive which comprises a rare earth organic compound, heteropoly acid (and salt thereof), chemical inhibitor, solvent, and the like and has the functions of resisting oxidation and preventing from scorch, dispersing, increasing the acid center, passivating the metal, and the like. When being added into a catalytic cracking lifting pipe reactor, the multifunctional catalytic cracking strengthening additive can inhibit the generation of secondary reaction such as thermal cracking reaction, dehydrogenation condensation reaction, and the like, reduces the generation of side products of net gas, coke, hydrogen, and the like, and improves the yield coefficients of products with high added values, such as liquid gas (especially propylene), gasoline and diesel. The catalytic cracking strengthening additive has the function of metal deactivator and can replace the metal deactivator, therefore, the metal deactivator needs not to be added after the catalytic cracking strengthening additive is added. The invention has the function of resisting oxidation and preventing from scorch, can inhibit a lifting pipe and a settling vessel from being coked and prevent a reaction system from scale deposit, thereby being multifunctional catalytic cracking strengthening additive.

The present invention discloses one-section cascade hydrocracking process, and features the hydrocracking unit comprising one hydrocracking pre-treating reactor filled with pre-treating catalyst and hydrocracking catalyst and one hydrocracking reactor filled with hydrocracking catalyst and post-hydrotreating catalyst connected serially. Compared with available technology, the hydrocracking unit of the present invention has the advantages of raised integral activity, increased treating capacity or increased operation period, and raised product quality.

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 waterproof coatings for engineering, and discloses a modified bisphenol epoxy resin, a preparation method of the modified bisphenol epoxy resin, a preparation method of an emulsion of the modified bisphenol epoxy resin and an application thereof. The product comprises a component A and a component B, the a component A is prepared from 10 to 25 parts of modified bisphenol epoxy resin emulsion according to claim 4, 10 to 90 parts of acrylate emulsion, 1 to 5 parts of water, 0.15 to 0.2 part of dispersing agent, 0.15 to 0.65 part of defoaming agent and 0.15 to 0.3 part of wetting agent, and the component B is prepared from 30 to 90 parts of cement, 30 to 60 parts of filler, 0.1 to 0.6 part of water reducing agent and 3 to 8 parts of curing agent. Compared with the prior art, the modified epoxy resin prepared by the invention has preferential adsorbability with cement particles, temperature change resistance, stronger adaptability to expansion and shrinkage of cement and better anti-aging effect, and the modified epoxy resin and the acrylate emulsion are reasonably proportioned, so that the waterproof coating disclosed by the invention is better in water resistance and physical performance, and through the synergistic effect of the MD650 epoxy resin curing agent and the MD2542 epoxy resin curing agent, the waterproof coating can be rapidly cured in a humid environment.

The invention discloses graphene-containing nano ore crystal purifying particles and a preparation method thereof. The graphene-containing nano ore crystal purifying particles comprise the following components in parts by weight: 45-55 parts of meerschaum, 10-12 parts of attapulgite, 8-12 parts of pure diatom, 1-2 parts of graphene, 8-12 parts of a photocatalyst, and 0.1-0.2 parts of tourmaline crystal. The nano ore crystal purifying particles are prepared by adding graphene and taking meerschaum as the main raw material, the nano ore crystal aperture diameter is between 0.27-0.98 nanometers, the nano ore crystal purifying particles enable crystal arrangement, are capable of preferentially adsorbing harmful gases such as formaldehyde, benzene and TVOC, can efficiently absorb poisonous and harmful gas, decomposes the adsorbed poisonous and harmful gas, and the nano ore crystal purifying particles combine functions of adsorption, degradation and antibiosis.

The invention relates to a method of using a carbon nanofiber layer to modify an ultrafiltration membrane and belongs to the field of environment-friendly water treatment. The method includes: pre-treating carbon fiber to obtain granule-like carbon fiber; ultrasonically dispersing and stirring the granule-like carbon fiber after being pre-treated in a solvent sufficiently, and pre-depositing the carbon nanofiber which is uniformly dispersed on the surface of the ultrafiltration membrane. The carbon nanofiber pre-deposited on the surface of the ultrafiltration membrane is equivalent to a simple coating which preferentially adsorbs pollutants to reduce membrane pollution. The carbon nano fiber pre-deposited on the surface of the ultrafiltration membrane is rich in source, so that operation cost is lowered greatly. The carbon nanofiber pre-deposited on the surface of the ultrafiltration membrane and the ultrafiltration membrane are in physical deposition, so that the carbon nanofiber and the ultrafiltration membrane can be completely removed by using a plastic scraper to slightly scrape and using deionized water to clean after reaction is finished. The method is simple to operate, low in cost and easy in large-scale use and popularization.

The invention relates to a method for preparing a superhydrophobic coating on the surface of SiO2 glass. According to the method, a micro-nano structure is constructed on the glass surface by means ofa layer-by-layer self-assembly approach, the glass after pretreatment is repeatedly soaked in a polyacrylic acid solution and a silver-modified polyetherimide solution separately to form a structurally stable multilayer film on the glass surface, and then the surface is coated with a hydrophobic coating to obtain the superhydrophobic coating. A process is simple, the cycle is short, the cost is low, and the stability and hydrophobicity of the superhydrophobic coating are good; it is found through a large number of experiments that the hydrophobicity of the multilayer film is good when the multilayer film has 8-14 layers. The hydrophobic coating contains silver and titanium dioxide nanoparticles, so that the superhydrophobic coating has high stability and a long-lasting antibacterial effect, and the addition of a certain quantity of the titanium dioxide nanoparticles helps to improve the roughness and hydrophobicity of the superhydrophobic coating.

The invention relates to a nanometer SiO2 abradant polishing fluid of the electronic glass which the weight ratio is the abradant and the SiO2 hydrosol 20-45%, the composite alkali 0.5-5.5%, the penetrant 1.0-10%, the surface active agent 1.0-10%, the de-ionized water residuum. The polishing fluid uses the SiO2 hydrosol as the base abradant and adjust the pH to 10.5-13.5 by the composite alkali formed by the KOH and the organic base. So the SiO2 has the good stability.

The invention relates to a synthesis method and application of a pore-diameter-adjustable Co-based MOF material with a nucleic acid screening function. The synthesis method comprises the following steps of: (1) respectively synthesizing organic ligands II, III and IV of which the chain lengths are progressively increased as shown in the following formula, (2) respectively preparing the same topological structure by selecting metal Co and the organic ligands II, III and IV to obtain MOFs materials of which the pore diameters are progressively increased, and (3) activating the prepared MOFs material, so as to obtain a Co-based MOF material, namely Co-IRMOF-74-II, Co-IRMOF-74-III and Co-IRMOF-74-IV. The synthesized MOF material is suitable for rapid separation of various types of nucleic acidmolecules with secondary structures and has universality, and MOF materials with different pore sizes are selected according to different types of separated nucleic acid structures.

The invention discloses a melamine laminated board with the air purification function. The melamine laminated board comprises a piece of wear resistant paper, a piece of upper decorative paper, an upper blockboard, a middle board, a lower blockboard, a piece of lower decorative paper and a piece of moistureproof paper, wherein the wear resistant paper, the upper decorative paper, the upper blockboard, the middle board, the lower blockboard, the lower decorative paper and the moistureproof paper are arranged from top to bottom. In this way, the melamine laminated board with the air purification function can meet the requirement for home decoration, has the advantage of preferentially adsorbing noxious gas such as formaldehyde, benzene and TVOC, achieves the effect of purifying indoor air, and is good in moistureproof effect and wear-resisting effect.

The invention relates to the technical field of catalysts, in particular to a catalyst for synthesizing 1,3-cyclohexanedimethylamine through hydrogenation of m-xylylenediamine and a preparation methodof the catalyst. The catalyst for synthesizing 1,3-cyclohexanedimethanamine through hydrogenation of m-xylylenediamine comprises a carrier, an active component doped on the carrier and an accelerant,wherein the carrier of the catalyst is an SAPO-11 mesoporous molecular sieve, the active component is metal Ru, and the accelerant is one or more selected from the group consisting of Pr, Nd, Mo, Luand Tm. According to the catalyst for synthesizing 1,3-cyclohexanedimethanamine through hydrogenation of m-xylylenediamine, the active component is not easy to lose, the service life is long, and selectivity is high. The invention also provides the preparation method of the catalyst.

The invention relates to a catalytic cracking oxygen-poor regeneration denitration agent and a preparation method thereof, and belongs to the field of catalytic cracking assistants. The catalytic cracking oxygen-poor regeneration denitration agent comprises a carrier and an active component, the carrier is active gamma-Al2O3, and the active component is a noble metal compound, a metal compound anda rare earth element compound; the catalytic cracking oxygen-poor regeneration denitration agent is prepared from the following raw materials in percentage by mass: 70 to 90 percent of active gamma-Al2O3, 1.5 to 5 percent of a noble metal compound, 4 to 10 percent of a rare earth element compound, 3 to 10 percent of a metal compound and 1.5 to 5 percent of phosphate. The catalytic cracking oxygen-poor regeneration denitration agent provided by the invention is high in denitration rate; the using process is easy and convenient to operate, secondary pollution is avoided, smoke can meet the emission standard, economic benefits are high, CO components in a regenerator are not consumed at all, and the safety is high; meanwhile, the invention further provides a preparation method.

The present invention discloses a manufacturing method of a mayan blue wallpaper. A wall paper base material is first prepared, and a mayan blue dye is then coated on the base material to form the mayan blue wallpaper. The wall paper manufactured by the method provided by the present invention has the effects of effective sterilization, deodorization, detoxication and insecticide, can help to keep a living environment sanitary and safe, and is beneficial to health of people.

The invention provides an aluminum/cerium bimetal organic framework material, a preparation method and application of the aluminum/cerium bimetal organic framework material in adsorbing and removing phosphorus. According to the method, cerium salt, aluminum salt and terephthalic acid are used as raw materials, N, N-dimethylformamide is used as a solvent, and the aluminum/cerium bimetal organic framework material is synthesized through a one-step hydrothermal synthesis method. The aluminum/cerium double-metal organic framework material disclosed by the invention has a relatively large specific surface area and a moderate pore diameter, so that the removal of phosphate radicals in water is facilitated. Meanwhile, through ligand exchange and complexation between Al and Ce in the material and phosphate, the material has an excellent phosphorus removal effect. The aluminum/cerium bimetal organic framework material has high selectivity on phosphate, is suitable for treating phosphorus-containing wastewater containing various ions and natural organic matters under the coexistence condition, and has relatively high phosphorus removal efficiency. In addition, the aluminum/cerium bimetal organic framework material also has a wide pH application range, and can realize rapid and efficient removal of phosphate radicals in a water body, thereby having a wide application prospect.

The invention discloses a method for detecting luteolin by combining solid-phase extraction and an electrochemical sensor, and belongs to the technical field of analytical chemistry. According to themethod, ZrO2 nanoparticle and chitosan doped graphene aerogel modified silica gel is used as a solid phase extraction column of an extraction material to extract luteolin in a to-be-detected sample, and ZrO2 nanoparticle and chitosan doped graphene aerogel modified glassy carbon electrode is used as an electrochemical sensor platform to detect the luteolin in the extract liquor. According to the invention, the ZrO2 nanoparticle and chitosan doped graphene aerogel is used as electrode materials, and the ZrO2 nanoparticle and chitosan doped graphene aerogel modified silica gel is used as the extraction material, so that the adsorption selectivity is high, and detection signal amplification is realized; the preparation method is simple and easy to implement and relatively low in cost; and thesolid-phase extraction and the electrochemical sensor are combined, so that the interference of a sample matrix is avoided, the detection sensitivity and accuracy of the method are improved, and theoperation is simple.

The invention discloses an acetylene hydrochlorination ultra-low mercury catalyst and a preparation method and application thereof. The catalyst is composed of HgCl2, CuCl2, ZnCl2, KCl and succinimide and prepared in the mode of solution dilution dipping and stepped heating drying, and the catalyst has the advantages of being low in mercuric chloride content, high in effective mercuric chloride content, multiple in active point location, high in dispersity, stable in valence state of catalytic active components, high in carbon deposition resistance and long in service life.

The invention discloses a method for preparing high-fluidity micron silver particles, and belongs to the technical field of powder materials. The preparation method can effectively solve the problem of crystal grain agglomeration of the silver powder in a liquid phase reaction in a traditional preparation method, and meanwhile, the solution can be mixed without stirring before the liquid phase reaction, so that the defect that larger crystal particles cannot be formed is avoided; and a dispersing agent in a traditional liquid phase reaction is replaced by a flow aid, the problem of subsequent silver powder cleaning residues is effectively avoided, the effects of dispersing the silver powder and improving the particle surface property are achieved, meanwhile, gas in silver particles can be preferentially adsorbed, and the finally prepared product is high in tap density and high in fluidity. The invention further discloses a dot screen type dispersing device for preparing the high-fluidity micron particles, the device can effectively and synchronously add a shaped silver source solution and a reducing agent solution into a flow aid solution, the uniformity of the mixed solution is improved, and the problem of crystal grain agglomeration of the silver particles is solved.

The present invention discloses a mayan blue wallpaper. The mayan blue wallpaper comprises a base material (1), and a mayan blue dye layer (3) is coated on the surface of the base material (1) through a bonding layer (2). The mayan blue wallpaper has the effects of effective sterilization, deodorization, detoxication and insecticide, can help to keep a living environment sanitary and safe, and is beneficial to health of people.