30 results about "Zeolite" patented technology

Disclosed herein are mixed matrix membranes which include a continuous phase organic polymer with molecular sieves interspersed therein, the molecular sieves comprising one or more zeolites having an HEU structure type; wherein the membrane exhibits a mixed matrix effect and further wherein the membrane has a N₂/CH₄ selectivity of greater than about 5, at 35° C. and a pressure of 100 psia (690 kPa). Methods for their preparation and use are also disclosed.

The invention relates to a high-temperature iron-based zeolite molecular sieve honeycomb type denitration catalyst and a preparation method thereof, and belongs to the technical field of atmospheric pollution treatment technologies and environmentally friendly catalyzing materials. The preparation method comprises the following steps: mixing ferrous salts with ferrite; synthesizing a zeolite molecular sieve, natural zeolite molecular sieve powder, attapulgite clay or kaolin, glass fibers, an organic binding agent, wood pulp or sesbania cannabina powder, stearic acid and glycerinum; and carrying out mixing, ageing, extrusion forming, drying and roasting to obtain the iron-based zeolite molecular sieve honeycomb type denitration catalyst. According to the catalyst, the zeolite molecular sieve and natural raw mineral materials which have excellent thermal stability are used as carriers, and the running stability, the sintering resistance and the mechanical strength of the catalyst in a high-temperature environment are improved. The obtained honeycomb type denitration catalyst has good water resistance and sulfur poisoning resistance, and the conversion ratio of oxynitride is greater than 90% under the conditions that the temperature is in the high-temperature range of 400-600 DEG C and the air speed is 10,000 h<-1>.

The invention discloses a coproduction method of 1, 2-propanediamine and dimethyl piperazine, which comprises the following steps of: mixing ammonia and isopropanol amine, pre-heating for vaporization, filling steam into a fixed-bed reactor, performing reaction in the presence of a catalyst for condensation and amination and under conditions with the pressure of 1.0MPa to 4.0MPa, the temperature of 300 DEG C to 350 DEG C and the contact time of 1.0-3.0s to obtain product stream of 1, 2-propanediamine, 2, 5-dimethyl piperazine, 2, 6-dimethyl piperazine, unreacted ammonia and unreacted isopropanol amine, and distilling the product stream for separation to obtain the 1, 2-propanediamine, 2, 5-dimethyl piperazine and 2, 6-dimethyl piperazine; wherein the weight ratio of the ammonia and the isopropanol amin is (10-16):1, and the catalyst for condensation and amination comprises the following ingredients by weight percentage: 97-99 percent of HZSM-5 (H-type zeolite sieve of molecular porosity 5) zeolite and 1-3 percent of phosphorus. The coproduction method is mainly applied in preparation of the 1, 2-propanediamine and the dimethyl piperazine.

The present invention relates to a novel nickel catalyst. The present invention also relates to a process for the preparation of an improved nickel catalyst. The present invention also relates to a process for hydrogenation of m-dinitro benzene to m-phenylene diamine using the said improved catalyst. More particularly the present invention relates to a process involving hydrogenation of m-dinitrobenzene to m phenylene diamine in the presence of a supported bimetallic platinum catalyst, using methanol as a solvent. The catalyst system consisting of one metal selected from platinum group and other nickel supported on either carbon or alumina or silica or zeolite. The catalyst of the present invention is a bimetallic catalyst prepared by precipitation and impregnation technique at very specific preparation conditions.

The invention provides preparation and application of nano zeolite reinforced xanthan gum composite hydrogel functional microspheres. The method selects a nanoscale zeolite molecular sieve which is synthesized by a template-free and low-cost manner, then premixes the nanoscale zeolite molecular sieve into a xanthan gum-sodium alga acid binary natural polysaccharide aqueous solution to prepare nano zeolite molecular sieve reinforced organic-inorganic composite hydrogel functional microspheres. Corresponding nano zeolite has a clear synergetic heavy metal adsorbing behavior; meanwhile, a corresponding xanthan gum-sodium alga acid binary polysaccharide cross-linking matrix has a richer micro three-dimensional network structure, thus micro channels of the nano zeolite, which are evenly distributed, directionally interact with polysaccharide molecular characteristic functional groups. The prepared microspheres have satisfactory effects of absorbing and removing cobalt ions and nickel ions in simulation nuclear industry wastewater.

The invention discloses a sewage treatment powder agent preparation method, which includes the following specific steps: (1) weighing the following components in parts by weight: 50-55 parts of zeolite, 4-8 parts of polyferric chloride, 12-16 parts of sodium polyacrylate, 6-8 parts of polydimethyldiallylammonium chloride, 12-16 parts of aluminum potassium sulfate, 3-7 parts of manganese dioxide and 5-9 parts of copper chloride; and (2) calcining the zeolite at 800-850 DEG C for 1-3 hours under the protection of nitrogen and pulverizing to obtain zeolite powder; adding the polyferric chloride,the sodium polyacrylate and the polydimethyldiallylammonium chloride into water to prepare a solution, spraying the solution into the zeolite powder, air-drying at 35-50 DEG C, and grinding into a powder material again. The method has the advantages of high sewage treatment efficiency, low sewage treatment cost and easily available raw materials.

The invention relates to a solid waste-based baking-free environment-friendly hollow brick and a preparation method thereof, and belongs to the field of solid waste utilization environmental protection and the field of hollow bricks. Red mud, mineral powder, industrial by-product gypsum, fly ash, silica fume, aluminum ash, carbide slag, wastewater and other solid wastes and waste liquids are usedas main raw materials. The hollow brick comprises the raw materials in parts by mass: 35-50% of red mud, 30-45% of mineral powder, 10-20% of industrial by-product gypsum, 5-15% of a reinforcing agent,0.5-3% of a cementing agent and the balance of sewage or wastewater, wherein the reinforcing agent is prepared by mixing 15-23% of silica fume, 10-25% of aluminum ash, 20-30% of fly ash, 15-30% of carbide slag, 5-10% of zeolite powder and 5-15% of asphalt. Large-scale resource utilization of solid waste is achieved, the occupied area of the solid waste is reduced, environmental pollution is reduced, no natural mineral resources are consumed during preparation, multiple solid waste and waste liquid are used as main raw materials of the baking-free hollow brick, and the product has the advantages of high strength, low cost, environmental protection, energy conservation, simple and convenient process and easiness in popularization and application.

The invention provides a preparation method of zeolite-activated carbon composite adsorbent, comprising the following steps: (1) mixing coal gangue powder, asphalt, and white carbon black, drying, and then, in a tube furnace, under the protection of inert gas, Carbonization, and then carbon dioxide gas is introduced to activate to obtain the activated sample; (2) Add the activated sample to the sodium hydroxide solution, react, stand at room temperature for hydrothermal crystallization, then ultrasonically disperse, filter, and filter the residue Washing and drying to obtain the zeolite-activated carbon composite material; (3) Add the obtained zeolite-activated carbon composite material to the glucose solution, stir, filter, dry the obtained filter residue, and then put it into a tube furnace under the protection of an inert gas , carbonized to obtain the zeolite-activated carbon composite adsorbent. The zeolite-activated carbon composite adsorbent prepared by the invention has large BET specific surface area and micropore specific surface area, and has large adsorption capacity for CH4 and N2.

The invention discloses BaKL zeolite rich in mesopores and a preparation method of the BaKL zeolite. The BaKL zeolite rich in mesopores is prepared by a method comprising the following steps: mixing K2O, Al2O3, SiO2, H2O and BaO into gel according to the molar ratio of (4-22.5) K2O: Al2O3: (10-25) SiO2: (180-350) H2O: (0.02-0.2) BaO, then standing for aging for 12-72 h at the temperature of 10-60DEG C to obtain a guiding agent; mixing K2O, Al2O3, SiO2 and H2O into gel according to the molar ratio of (4-12) K2O: Al2O3: (10-30) SiO2: (120-300) H2O, successively adding an organic pore-enlargingagent which accounts for 5-20% of the mass of added solid substances for synthesizing the gel and a guiding agent which accounts for 10-40% of the mass of the added solid substances for synthesizing the gel, crystallizing the gel at the temperature of 100-200 DEG C for 12-72 h, and finally filtering, washing, drying and roasting to obtain the BaKL zeolite rich in mesopores. The invention further provides a Pt/BaKL catalyst prepared by loading the BaKL zeolite with Pt through an ion exchange method, and the Pt/BaKL catalyst has excellent aromatic hydrocarbon selectivity and one-way service life.

The invention belongs to the technical field of fingerprint identification, and particularly relates to carbon dot zeolite composite material fingerprint developing powder and a preparation method thereof. The fingerprint developing powder disclosed by the invention is obtained by loading carbon dots by taking Silicalite-1 zeolite as a carrier, and is marked as a carbon dot@Silicalite-1 zeolite composite material; on the basis of the amount of the Silicalite-1 zeolite, the loading amount of the carbon dots is 2-10%. The preparation method comprises the steps: mixing tetrapropylammonium hydroxide, a sodium hydroxide solution, tetraethoxysilane and deionized water according to a certain proportion, uniformly stirring, then adding carbon dot powder, aging at room temperature, then heating and stirring, and centrifuging, washing, drying and grinding the reacted product to obtain the carbon dot@Silicalite-1 zeolite composite material. The composite material can be used for fingerprint detection and imaging of developed fingerprints under an ultraviolet lamp.

The invention discloses a sediment improver for black and odorous water, which is composed of the following raw material components in percentages by weight: 20-40% of potassium ferrate, 25-35% of quicklime, 5-10% of polyaluminium chloride, 5-15% of potassium persulfate, and 15-25% of zeolite. Through the sediment improver for the black and odorous water provided by the invention, organic matterscan be completely decomposed, eutrophic substances are adsorbed and fixed, the sediment environment is completely changed, so the reproduction and growth of microorganisms and aquatic animals in waterare promoted, thereby accelerating the restoration of ecosystems.

The invention discloses a functional accessory ingredient for plastic processing and a preparation method thereof. Each raw constituent of the functional accessory ingredient is prepared in parts by weight: 90-100 parts of light calcium carbonate powder, 3-5 parts of calcined Zeolite powder, 2-2 parts of attapulgite, 1-2 parts of straw ashes, 3-5 parts of zinc oxide, 3-5 parts of gas-phase silica, 1-2 parts of methacrylate polymer, 1-2 parts of polyethylene wax, 1-2 parts of sodium alkyl benzene sulfonate and 1-2 parts of glycerol. The preparation method comprises the following steps: continuously oven-drying light calcium carbonate until the water content is below 0.3 % and putting the calcium carbonate into a high-speed kneading machine, then adding other ingredients by weight percentage, and then heating the mixture to 100-130 DEG C, and stirring under heat insulation for 8-10 min, and discharging the materials to obtain the finished products. The functional accessory ingredient for plastic processing provided by the invention reduces the surface energy among the particles and enhances the compatibility and the dispersity; the invention also promotes the plastication of high polymer material, reduces melt viscosity, improves processing flowability, improves impact strength, rigidity, heat resistance and size stability, and has the features of energy conservation, environmental friendliness, no poison and no waste water, no waste gas and no waste residues.

The invention discloses a soil composite modifier and application thereof. The soil composite modifier is prepared from, by mass, 10-20% of activated sludge, 10-20% of fulvic acid, 10-20% of charcoal,1-5% of microbial agent, 10-20% of calcium bentonite, 5-10% of zeolite flakes, 20-30% of sulfate reducing bacteria liquid and 20-30% of organic fertilizer. The prepared composite improver for the construction waste contaminated soil can improve the problem of soil alkalinization caused by disordered stacking and landfill of construction waste, can adsorb heavy metals in the construction waste andheavy metals in the deep layer of the soil, has a good effect of removing heavy metal ion pollution, meets the requirements of plant growth, and can be used for alkaline soil remediation, remediationof heavy metal pollution in soil caused by disordered stacking and landfilling of construction waste and remediation of deep soil pollution.

The invention discloses a preparation method of a multi-function zeolite-tailing water absorbing and storing nutrient bag for desert. The main point of the technical scheme is that the multi-functionzeolite-tailing water absorbing and storing nutrient bag for desert is a cylindrical cloth bag made of geotextile, the upper part of the cylindrical cloth bag is open and is used for adding a multi-function zeolite-tailing water absorbing and storing nutrient conditioner for desert, and the bottom of cylindrical cloth bag is a closed round bottom. After the water absorbing and storing nutrient conditioner in the multi-function zeolite-tailing water absorbing and storing nutrient bag for desert absorbs water and is expanded, sealing packaging is carried out for obtaining the finished product ofthe multi-function zeolite-tailing water absorbing and storing nutrient bag for desert. The multi-function zeolite-tailing water absorbing and storing nutrient bag for desert is suitable for variousgreening plants in a desert, and can timely provide water and nutrition required in the plant growth process, so that the survival rate of the planted various greening plants is improved, normal growth and development in the desert is ensured, the large-area afforestation rate in the desert is accelerated, the ecological environment of desertification land is improved, and the spread of desertification is prevented.

The invention discloses a preparation method of composite microbial agent solid particles for environmental protection, which comprises the following steps: (1) carrying out high-density fermentation culture on composite microorganisms for environmental protection to obtain high-density fermentation liquor, and adjusting the solid content of the microorganisms in the high-density fermentation liquor to 30-80%; (2) adding biological ceramsite/volcanic rock/zeolite into the adjusted high-density fermentation liquid, and uniformly mixing; and (3) drying the high-density fermentation liquor at 40-90 DEG C for 12-36 hours to obtain the composite microbial agent solid particle product for environmental protection. The raw materials adopted by the invention are low in price, the process is simple to operate, the production efficiency is high, and an economic and efficient composite microbial agent solid particle product can be provided for the environmental protection industry.

The invention belongs to the technical field of material chemistry and particularly relates to a method for preparing multilevel porous zeolite through microwave assisted decomposition of hydrogen peroxide. The method comprises the following steps: quickly decomposing hydrogen peroxide with certain concentration under the action of microwave radiation to generate a gas so as to produce instantaneous violent impact on zeolite to introduce secondary pores into beta zeolite. The method provided by the invention is simple in equipment, simple and convenient to operate and quick to react. The introduction of the secondary pores increases the specific surface area and the pore volume of the beta zeolite and reduces the crystal defects of the beta zeolite to ensure a more beautiful skeleton. The micro blasting pore-forming zeolite material has a huge application value in some macromolecular limited zeolite catalysis fields, for example, petroleum reforming, catalytic cracking and the like.

The invention provides a dredging agent containing Anoxybacillusrupiensis. The dredging agent comprises a biocatalyst, a nonionic surfactant, an Adina rubella Hance root extract, an aloe extract, an eyebright extraction stock solution, a biological enzyme active agent, EDTA chelated iron, citric acid, protocatechuic acid, compound vitamin, a substrate, a porous sodium type activated zeolite powder carrier, halophilic bacteria, Anoxybacillusrupiensis, and an adhesive. The invention also provides application of the dredging agent containing Anoxybacillusrupiensis in a subsurface salt drainage pipe. The dredging agent provided by the invention has the following advantages: the alga-killing rate is improved and reaches 87 to 92%; good dredging effect is achieved; the quality of treated water is transparent and bright, has high transparency and is free of suspension; the quality of the water of a control group is yellowing and turbid, and contains black suspended solids with a concentration of 3 to 5%; and after dredging is completed, the salt water collection rate of the subsurface salt drainage pipe is improved and reaches 119.8 to 132.6%, while the salt water collection rate of the control group is 100%.

The invention discloses a preparation method of a porous pollucite profile. The preparation method is characterized by comprising the following steps: taking and mixing 100 weight parts of metakaolin,75-210 weight parts of an amorphous form spherical silicon dioxide ultrafine powder, 145 weight parts of cesium hydroxide monohydrate at the weight ratio; taking and adding water of which the weightis 20% of the total weight of the metakaolin, the amorphous form spherical silicon dioxide ultrafine powder and the cesium hydroxide monohydrate, and stirring evenly to obtain a slurry; injecting theslurry into a steel mold, sealing, processing in an air dry oven of 50-100 DEG C for 24 hours, then demolding to obtain a solid profile; putting the solid profile in an autoclaving reaction kettle, hydrothermally reacting in a water vapor environment of 160-220 DEG C for 12-24 hours, taking out the solid profile and drying to obtain the porous pollucite profile. By adopting the preparation method,the porous pollucite profile having the advantages of excellent mechanical property and high porosity is directly obtained, and the porous pollucite profile can be used as a catalytic reactor, a high-temperature resistant catalyst carrier and a high-temperature resistant thermal insulating layer in the fields like chemical engineering and environments.

A composite media for non-oxidative C₂H₆ dehydrogenation comprises an aluminosilicate zeolite matrix, and an EDH catalyst on one or more of an external surface of the aluminosilicate zeolite matrix and internal surfaces within pores of the aluminosilicate zeolite matrix. The EDH catalyst comprises one or more of Fe, Zn, Pt, Ga, alloys thereof, and oxides thereof. A C₂H₆ activation system, and a method of processing a C₂H₆-containing stream are also described.

The invention discloses a decorative material for an electric power tower, belonging to the technical field of the decorative material. The decorative material mainly comprises the following raw materials in parts by weight: 80-85 parts of cement, 45-50 parts of metakaolin, 7-8 parts of calcium hydrophosphate, 12-13 parts of zirconium silicate powder or yttria-stabilized zirconia powder, 5.5 parts of sodium butyrate, 6.3 parts of sodium humate, 2-3 parts of aluminum silicate, 2-3 parts of sodium tartrate, 15-16 parts of nanometer calcium carbonate, 14-15 parts of nanometer zeolite and 2-3 parts of a powdered de-foaming agent. According to the decorative material, the formula is reasonable, the service life of gate post decorative material is greatly prolonged and the decorative material is mainly used for the electric power tower.

The invention relates to a high-strength food packaging film and a manufacturing method thereof. The high-strength food packaging film is characterized by being prepared from, by weight, 200-250 parts of base resin, 22-25 parts of antioxidant, 2.2-3.4 parts of styrol copolymer, 6-9 parts of antioxidant, 2.6-2.8 parts of auxiliary antioxidant, 13-18 parts of heat stabilizer, 13-15 parts of polypropylene, 1-1.5 parts of zeolite, 2.2-3.0 parts of glutaraldehyde, 1.4-2.3 parts of acetic acid, 100-200 parts of LLDPE, 3.4-5.3 parts of stabilizer, 2.8-3.5 parts of pentaerythritol tallate, 3.4-6.3 parts of butadiene, 1.4-2.0 parts of heat stabilizer and 1.4-2.0 parts of antistatic agent. The food packaging film has the advantages that the defects that the own strength of a film is low, and the film cannot be torn easily and is fractured easily when folded are overcome, the hardness of the film is improved, and the film can adapt to environment conditions such as external temperature and humidity and has comprehensive water and gas resisting performance.

The invention relates to the field of waterproof coatings, and discloses a nano densified polymer-based waterproof coating and a preparation method thereof. The preparation method comprises the following steps: (1) sequentially adding aluminum trichloride and nano zeolite powder into water, and filtering and drying to obtain an aluminum trichloride/zeolite powder composite material, (2) carrying out ball milling treatment on the composite material, then adding polyvinyl alcohol and water, and uniformly stirring to obtain a polyvinyl alcohol coated aluminum trichloride/zeolite powder compositematerial, and (3) uniformly mixing the composite material with barite powder, nano silicon dioxide, polymer redispersible rubber powder, Portland cement and a thickening agent to obtain the nano densified polymer-based waterproof coating. The polymer-based waterproof coating prepared by the invention contains the polyvinyl alcohol-coated aluminum trichloride/zeolite powder composite material, so that the defect can be slowly filled with the stone aluminum trichloride when the coating has the defect, and meanwhile, a gel film is formed to seal micropores, so that a waterproof layer is denser, and the waterproof performance of the waterproof coating is improved.