826 results about "Butene" patented technology

The invention discloses a scratch repair coating and a preparation method thereof, and relates to the technical field of high polymer materials. When the scratch repair coating is prepared, hydroxylated boron nitride reacts with 1-(3-triethoxysilylpropyl)-2-imidazoline to prepare pre-modified boron nitride, and then the pre-modified boron nitride and 4-chloro-1-butene are subjected to quaternization to prepare modified boron nitride; the preparation method comprises the following steps: reacting styryl phosphonic dichloride with 4, 4, 5, 5, 6, 6, 7, 7, 7-nonafluoro-1, 2-heptanediol to prepare a hydroxyl-terminated phosphorus-fluorine-containing polymer; the preparation method comprises the following steps: reacting isophorone diisocyanate with a hydroxyl-terminated phosphorus and fluorine-containing polymer to prepare a polyurethane prepolymer; reacting the polyurethane prepolymer with hydroxyl-terminated coumarin to generate modified polyurethane; and uniformly mixing the modified polyurethane, the modified boron nitride and a photoinitiator to prepare the scratch repair coating. The scratch repairing coating prepared by the invention has good self-repairing performance, flame retardant property, corrosion resistance and mechanical property.

The disclosure provides a catalyst reaction mixture including a ligand having a backbone with at least one phosphorus atom and at least one nitrogen atom, a chromium compound, and a solvent mixture including decalin and at least one additional solvent, wherein the solvent mixture comprises decalin in an amount of less than 20 wt. % and, optionally, perhydroindane in an amount of 50 wt. % or less, based on the total weight of the solvent mixture. A method of forming a linear alpha olefin through ethylene oligomerization is also provided, the method including contacting ethylene gas with a reaction mixture in a reactor, the reaction mixture including the catalyst reaction mixture of the disclosure; and withdrawing a product stream including at least one linear alpha olefin, such as 1-butene, 1-hexene, or 1-octene, from the reactor.

The invention discloses a preparation process of an antibacterial and anti-cracking plastic part for a refrigerator part. The preparation process comprises the following steps: preparing Ag ion antibacterial particles; the preparation method comprises the following steps: uniformly mixing transparent PP resin, Ag ion antibacterial particles, a styrene-ethylene-butylene-styrene block copolymer and a functional aid according to different proportions to respectively obtain a blend of a surface layer, a transition layer and a core layer; a five-layer co-extrusion die head is used for co-extrusion, all the layers are arranged in a surface layer-transition layer-core layer-transition layer-surface layer mode, and an extruded sheet is obtained; carrying out hot-pressing treatment on the extruded sheet, and inducing interlayer diffusion to form a blank with gradient change of the doping amount of the Ag ion antibacterial particles; and taking the blank, and carrying out post-treatment. The doping amount of the Ag ion antibacterial particles is changed in a gradient mode through multi-layer co-extrusion and hot pressing treatment, namely, the doping amount is gradually reduced from the surface layer to the core layer in the thickness direction, the doping amount in the same thickness plane is equal, the accessory has the advantages of being good in antibacterial performance and excellent in transparency, meanwhile, the usage amount of Ag is reduced, and cost is reduced.

The invention relates to the technical field of high polymer materials and sealing, in particular to a rubber gasket and a preparation method of the rubber gasket. The preparation method comprises the following steps: enhancing by using an ethylene-vinyl alcohol copolymer (EVOH) with the ethylene content of 29-48%, carrying out compatibility by using a styrene-ethylene-butylene-styrene block copolymer grafted maleic anhydride (SEBS-g-MA) with the grafting rate of more than or equal to 10%, carrying out synergistic reinforcement by using carbon black and nanoscale calcium carbonate, and carrying out premixing, hot-pressing vulcanization and acid environment aging treatment. Through EVOH enhancement, SEBS-g-MA compatibility, filler synergistic reinforcement and process optimization, multiple improvements of compatibility, mechanical properties, barrier property and acid resistance are achieved, key defects of a traditional EPDM gasket are overcome, and the EPDM gasket has remarkable technical advantages and practical value in the high-end sealing field (such as fuel cells and tunnel engineering).

The invention relates to a membrane separation method and device for separating 1, 3-butadiene from a C4 hydrocarbon mixture. According to the membrane separation method, a C4 hydrocarbon mixture is used as a raw material and is separated through an MOF membrane, and 1, 3-butadiene is obtained on the permeation side of the membrane; the C4 hydrocarbon mixture comprises 1, 3-butadiene, and further comprises one or a combination of more selected from the group consisting of n-butene, isobutene, n-butane, isobutane, cis-2-butene and trans-2-butene; and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90, and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90. The separation is carried out in an MOF membrane separation device, the MOF membrane separation device comprises an MOF membrane separator, and the MOF membrane separator comprises an MOF membrane assembly and the MOF membrane. According to the method, a membrane separation technology is adopted, so that high-purity 1, 3-butadiene can be efficiently obtained in a manner of increasing the productivity.

The invention relates to the field of films, in particular to a low-temperature-resistant polypropylene matt film, a preparation method thereof and a cold laminating composite film, the matt film comprises a matt layer, a core layer and a laminating layer which are arranged in sequence; the matt layer comprises 45-55 wt% of polypropylene random copolymer and 45-55 wt% of high-density polyethylene, the core layer comprises homo-polypropylene and 5-10 wt% of poly (1, 4-butylene glycol-1-butylene random copolymer, and the laminating layer comprises homo-polypropylene and 2-5 wt% of n-alkyl maleate grafted modified ethylene-vinyl acetate copolymer. The matt film disclosed by the invention has proper flexibility in a low-temperature environment, proper adhesive force still exists between the fitting layer and the adhesive layer, and the matt film is smooth to wind and unwind during manufacturing and can be used as a base film of a low-temperature-resistant cold laminating film.

The invention relates to the technical field of cables, in particular to a high-flexibility ethylene-propylene insulating rubber material for a charging pile cable and a preparation process. The composite material comprises an ethylene propylene diene monomer, a thermoplastic polyolefin elastomer, an ethylene-butylene copolymer, nanoscale magnesium hydroxide, a silane coupling agent, dicumyl peroxide, a hindered phenol antioxidant and a phosphite antioxidant. The ethylene propylene diene monomer and the ethylene-butylene copolymer form a flexible network skeleton, and the ethylene-butylene copolymer and the thermoplastic polyolefin elastomer are subjected to molecular-level blending, so that the elongation at break and the bending fatigue resistance are improved; silane coupling agent modified nano magnesium hydroxide is chemically bonded with a rubber matrix, so that the flame retardance and thermal aging resistance are enhanced, and the negative influence of filler agglomeration on flexibility is reduced; the compound antioxidant system effectively inhibits thermal oxidation degradation at high temperature, avoids insulation failure, realizes collaborative optimization of high flexibility and high heat resistance, and improves the reliability and applicability of the charging pile cable.

The present invention relates to a composition in the form of a water-in-oil emulsion, including, (a) one or more esters formed from at least one fatty acid having more than 13 carbon atoms; (b) a polymer component including one or more polymerized (iso)butenes; (c) at least about 3% by weight of one or more carbohydrate fatty acid ester emulsifiers; (d) one or more fillers comprising hydrophobic silica; and (e) one or more pigments. The composition is substantially free of silicones & alkanes.

The present invention relates to a matting agent for HAA powder coatings and a preparation method thereof. The matting agent is a matting polymer containing special groups such as hydroxyl and epoxy groups with significantly different activities. The matting polymer is mainly prepared from glycidyl methacrylate, methyl methacrylate, butyl acrylate, 5-norbornene-2-methanol, 2-methyl-3-butene-2-ol, dicyclopentadiene dioxide, a hydroxyl polyester resin, and an accelerator. Due to the presence of hydroxyl and epoxy groups of varying activities in its structure, supplemented by the accelerator and the physical dispersion effect during the preparation process, the product has excellent matting ability and good storage and matting stability. It can reduce the gloss of HAA system powder coatings to 3-10%.

The present application relates to compositions comprising 3,3,4,4,4-pentafluoro-1-butene (HFO-1345zf, CF3CF2CH=CH2) processes of preparing such compositions and their use.

The invention discloses a polypropylene composite material modified by a branched polyolefin material. The polypropylene composite material comprises the following components in parts by weight: 10-40 parts of polypropylene with a high melt index, 30-50 parts of impact-resistant polypropylene with a low melt index, 10-35 parts of the branched polyolefin material and 15-25 parts of filler. The branched polyolefin material has a long and short branched chain structure, and the weight-average molecular weight of the branched polyolefin material is 2000-8000000 g / mol; the branching degree is 40-180 / 1000 DEG C, and the melt index is 0.01-20 g / 10 min under the conditions that the temperature is 190 DEG C and the load is 2.16 kg. The technical problem that the mechanical property of an ethylene-butylene copolymer as an elastomer is not better than that of an ethylene-octylene copolymer is solved by adopting the light olefin as a raw material and optimizing the molecular structure and combination of the material, and compared with the traditional POE ethylene-octylene copolymer, the light olefin is adopted as the raw material, so that the raw material cost is reduced, and the economic benefit is improved; the low-temperature toughness and the mechanical property of the polypropylene composite material are obviously improved, and the polypropylene composite material is especially suitable for the plastic modification field.

The invention discloses a catalyst for synthesizing 3-methyl-3-butene-1-alcohol as well as preparation and application of the catalyst. The preparation method of the catalyst comprises the following steps: (S1) mixing acrylic acid, acrylate, a dispersing agent, a flatting agent and a light curing agent to obtain a photosensitive resin mixed solution; (S2) mixing first powder with the photosensitive resin mixed solution obtained in the step (S1), sequentially adding a suspending agent, a soaking and washing agent and second powder, standing, and then adding an anti-sticking agent and a soaking and washing agent to obtain printing slurry; and (S3) loading the printing slurry obtained in the step (S2) into a liquid carrying device, carrying out 3D printing according to a set program, and carrying out post-treatment to obtain the catalyst with a three-dimensional cuboid grid skeleton structure. The catalyst is high in mechanical strength and long in service life, and is used for the process of generating 3-methyl-3-butene-1-alcohol from isobutene and formaldehyde, and the formaldehyde conversion rate and the 3-methyl-3-butene-1-alcohol selectivity are greatly improved.

The invention relates to a polypropylene material and a preparation method thereof, and discloses a high molecular weight propenyl elastomer toughened polypropylene blend composite material and a preparation method thereof. The preparation method comprises the following steps: toughening polypropylene by using a high-molecular-weight propenyl elastomer; the high-molecular-weight propenyl elastomer is prepared from propylene monomers and comonomers (one or more of 1-butene, styrene, 1-hexene, 1-octylene, 1-decene and the like) through a quinoline amino binuclear metal hafnium catalyst and co-catalysts (tri-pentafluorophenyl boron, triphenylcarbonium tetra (pentafluorophenyl) borate, aluminoxane, aluminum alkyl and the like). And one or more of alkyl aluminum chloride and the like). According to the present invention, the polypropylene-based blend composite material has characteristics of PP toughness improving, excellent strength and excellent rigidity maintaining, and excellent low temperature toughness, specifically, after the toughening modification, the normal temperature (25 DEG C) toughness and the low temperature (-25 DEG C) toughness of the polypropylene-based blend composite material are significantly improved, and the tensile strength change is not significant. Therefore, the invention has original innovation, and provides a new direction for the development of the field of polyolefin materials.

The invention discloses an ethylene dimerization catalyst composition and application thereof, the catalyst composition mainly comprises a cocatalyst and a main catalyst, the cocatalyst comprises the following raw materials by mole: 41%-90% of an aluminum-based compound, 9%-41% of a polymerization inhibitor A1, and 0.9%-16% of a dispersant B1; the main catalyst comprises the following raw materials: 13%-50% of a titanium-based compound, 50%-78% of a polymerization inhibitor A2 and 0%-7.9% of a dispersing agent B2, and the ethylene dimerization catalyst composition comprises a co-catalyst mainly composed of an aluminum-based compound, a polymerization inhibitor A1 and a dispersing agent B1 and a main catalyst mainly composed of the titanium-based compound, the polymerization inhibitor A2 and the dispersing agent B2. The polymerization inhibitor A1, the polymerization inhibitor A2, the dispersing agent B1 and the dispersing agent B2 are introduced, so that the catalyst has higher catalyst activity, generation of scaling polymers is effectively reduced, the catalyst can be used for producing 1-butene through ethylene dimerization, and the problem that a large number of polymers are produced as by-products in current industrial production can be effectively solved.

A process for converting whole crudes and other heavy hydrocarbon streams to produce ethylene. The process includes feeding a hydroprocessed medium boiling fraction, a hydroprocessed residue fraction, or both, and a light boiling fraction to a steam cracker and recovering a light fraction. The light fraction is fed to a first separator and recovering a C1-C3 stream and a mixed C4 and C4+ stream, comprising isoolefins, olefins, and dienes and feeding the mixed C4 and C4+ stream to a second separator and recovering a mixed C4 stream comprising isoolefins, olefins, and a C4+ stream. A portion of the mixed C4 stream is dimerized in a dimerization unit to produce a dimerized product stream, hydrogenated in a total hydrogenation system, producing a hydrogenated dimer product stream, and cracking the hydrogenated dimer product stream in a thermal cracking reactor system, producing one or more of hydrogen, methane, ethylene, propylene, n-butenes, and isobutene.

The invention relates to the technical field of chemical separation, and discloses an isomerization system and process for 1-butene in etherified C4. Comprising an isomerization reactor, a coalescer, a heat exchanger, a static mixer and a filter, an inlet of the coalescer is connected with an etherified C4 pipeline, an outlet pipeline of the coalescer penetrates through the heat exchanger to be connected with an inlet of the static mixer, the inlet of the static mixer is further connected with a hydrogen pipeline, and an outlet of the static mixer is connected with an inlet of the isomerization reactor. An isomerization reactor outlet is connected with a filter inlet, and a filter outlet pipeline enters the isobutane separation tower. According to the method, 1-butene in etherified C4 is isomerized, and after 1-butene is isomerized into 2-butene by utilizing the relatively small relative volatility of 1-butene and iso-butane and the relatively large relative volatility of 2-butene and iso-butane, the content of 1-butene in the raw material is reduced, the separation difficulty of iso-butane is reduced, and iso-butane with the same purity is obtained; the reflux ratio of the isobutane separation tower can be reduced, and the purpose of saving energy is achieved.

The invention relates to the technical field of chemical engineering, and discloses a catalyst, a preparation method and application of the catalyst in preparation of isopentenal. According to the catalyst for catalyzing isomerization rearrangement of 2-methyl-3-butyne-2-alcohol to prepare isopentenal, provided by the invention, the lanthanide metal oxide is utilized to modify the supported vanadium catalyst, so that the selectivity of the catalyst can be improved, and the yield of isopentenal is increased. According to the synthesis process of the isopentenal, 2-methyl-3-butene-2-alcohol can be isomerized and rearranged into the isopentenal by adopting a reactive distillation mode without using a toxic solvent, efficient and continuous production of the isopentenal is realized, meanwhile, under the catalytic action of the catalyst, the raw material can be converted into the isopentenal with high selectivity, the yield of the isopentenal is increased, and the yield of the isopentenal is increased. And under proper process conditions, hydrogen ions can be provided in the presence of a proper amount of water, so that the raw materials are promoted to be subjected to isomerization rearrangement reaction quickly, the surface temperature of the catalyst is reduced, and the carbon deposition phenomenon of the catalyst is relieved to a certain extent.

An olefin production system (1) comprises: a reactor (10) that generates water and a hydrocarbon, which contains a lower olefin, from a feedstock containing hydrogen and carbon dioxide and / or carbon monoxide; a first gas-liquid separation tank (20) that separates the product generated by the reactor (10) into a gas containing the lower olefin and a liquid containing water and a hydrocarbon that contains the lower olefin; and a second gas-liquid separation tank (30) that is connected to the first gas-liquid separation tank (20) and separates the gas containing the lower olefin from the liquid transferred from the first gas-liquid separation tank (20). The lower olefin contains at least one substance selected from the group consisting of ethylene, propylene, butene and butadiene.

The invention belongs to the technical field of direct preparation of low-carbon olefin from synthesis gas, and particularly relates to a catalyst and a method for preparing propylene and butylene by direct conversion of synthesis gas. The catalyst comprises a component A and a component B, the component A and the component B are compounded together in a mechanical mixing mode, an active component of the component A is a metal oxide, and the component B is an SAPO-14 molecular sieve or a heteroatom modified SAPO-14 molecular sieve. The synthesis gas is used as a reaction raw material, a conversion reaction is carried out on a fixed bed or a moving bed, the reaction process has very high product yield and selectivity, the selectivity of low-carbon olefin can reach 70%-90%, the selectivity of propylene and butylene can reach 60%-80%, the selectivity of propylene and butylene in low-carbon olefin can reach 75%-95%, and the selectivity of propylene and butylene in low-carbon olefin can reach 70%-90%. The ratio of propylene to butylene is 1.5-3.5, and the byproduct methane selectivity is low (lt; and the method has a good application prospect.

A process for the manufacture of styrene acrylic copolymers having a renewably-sourced carbon content comprises the steps of: a) subjecting a feedstock comprising a renewably-sourced ethanol to dehydration to produce a renewably-sourced ethylene stream; b) subjecting at least a portion of the renewably-sourced ethylene stream to an olefin-interconversion, to obtain a renewably-sourced propylene; the olefin- interconversion comprising (i) and (ii): (i) ethylene dimerization to obtain n-butenes; (ii) metathesis reaction between n-butenes obtained according to (i) and ethylene to obtain propylene; and c) subjecting a portion of the renewably-sourced propylene to an oxidation reaction to produce acrylic acid; d) subjecting a portion of the renewably- sourced propylene to a hydroformylation reaction with syngas to produce n-butyraldehyde; e) subjecting the n-butyraldehyde to hydrogenation to produce n-butanol; f) esterifying acrylic acid obtained in step c) and the n-butanol to produce n-butyl acrylate; g) subjecting ethylene to an alkylation reaction with benzene to produce ethylbenzene; h) subjecting the ethylbenzene to a dehydrogenation reaction to produce styrene; i) copolymerizing the styrene and the n-butyl acrylate to produce a styrene acrylic copolymer. The process has a high renewably-sourced carbon content, in particular an increased renewably-sourced carbon content with respect to the renewably-sourced carbon content available in a cracker-based process.

To obtain a copolymer which has a high crosslinking rate and excellent productivity and can form a molded product with thermal aging resistance, small compression set at high and low temperatures, and improved low-temperature characteristics (low-temperature elastic recovery characteristics and Gehman torsion characteristics), a composition containing the copolymer, and the like.SOLUTION: An ethylene / α-olefin / nonconjugated polyene copolymer (A) has a structural unit derived from ethylene [A1], a structural unit derived from a C4-20 α-olefin [A2], and a structural unit derived from a nonconjugated polyene [A3] having two or more partial structures selected from the group consisting of the following general formulae (I) and (II) in total in one molecule and satisfies specific requirements. The structural unit derived from the [A2] contains a structural unit derived from 1-butene, and the structural unit derived from the [A3] contains a structural unit derived from 5-vinyl-2-norbornene.SELECTED DRAWING: None

The invention relates to preparation and application of a metal oxide-molecular sieve composite catalyst, and belongs to the technical field of industrial catalysis. The catalytic reaction takes carbon dioxide and hydrogen as reaction raw materials, and the catalyst is formed by compounding a metal oxide and a molecular sieve. Wherein the metal oxide is a solid solution metal oxide or a spinel metal oxide composed of three or two metal elements of M1, M2 and M3, M1 is one of Zn, Ga and In, M2 is one of Ce, Sm, La and Fe, and M3 is one of Zr, Ga, Cr, Al and Ti; the framework of the molecular sieve is a silicon-aluminum-oxygen or silicon-phosphorus-aluminum-oxygen tetrahedron; the metal oxide is prepared by adopting a gas diffusion method. The metal oxide disclosed by the invention is prepared by adopting a gas diffusion method, and has a very high specific surface area (80-300 m < 2 > g <-1 >). The composite catalyst shows excellent performance in a reaction for preparing low-carbon olefins (ethylene, propylene and butylene) through carbon dioxide hydrogenation, the carbon dioxide conversion rate can reach 35% or above, the carbon monoxide selectivity is smaller than 40%, the selectivity of the low-carbon olefins in hydrocarbons can reach 82.1%, the yield of the low-carbon olefins reaches 20.3%, and the composite catalyst has high catalytic stability. Compared with a traditional catalyst, carbon dioxide and hydrogen can be efficiently adsorbed and activated, so that the conversion rate of carbon dioxide is increased, the preparation method is simple, the catalytic performance is excellent, and the catalyst has good industrial application prospects.

The utility model belongs to the technical field of refining devices for chemical raw materials, and particularly relates to a 1-butene refining device with coupled dividing wall column and heat pump rectification. The 1-butene refining process device with coupled dividing wall column and heat pump rectification comprises a dividing wall column, a 1 # condenser and a compressor, a partition plate is arranged in the dividing wall column and divides the internal space of the dividing wall column into four parts, namely a public rectifying section, a feeding section, a discharging section and a public stripping section, a liquid collecting tray is arranged at the public rectifying section, and a liquid outlet is formed in the liquid collecting tray. A liquid outlet of the liquid collecting tray is connected with one end of a distribution pipeline outside the dividing wall column, the other end of the distribution pipeline is connected with the feeding section and the discharging section, and a regulating valve is arranged on the distribution pipeline; a tower bottom discharge port of the dividing wall tower is connected with the 1 # heat exchanger, the 1 # heat exchanger is connected with the throttle valve, and the throttle valve is connected with the 1 # condenser. The 1-butene refining device with coupled dividing wall column and heat pump rectification, provided by the utility model, is compact in structure and low in investment.

The present invention discloses a gas-phase preparation method of 1,1,1,4,4,4-hexafluoro-2-butyne. Using a mixture of 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-butene and hydrogen as raw materials, under the action of a particulate catalyst, 1,1,1,4,4,4-hexafluoro-2-butyne is obtained through a one-step hydrodechlorination reaction. The catalyst includes a carbon carrier and an active phase in the form of hollow spheres supported on the carbon carrier. The active phase includes: a first metal selected from at least one of silver, copper, nickel, and cobalt; and a second metal selected from at least one of palladium, platinum, and rhodium. The present invention has the advantages of high product selectivity, high catalytic activity, obtaining the reaction product through a one-step reaction, and being suitable for industrial application, etc.

This invention relates to the preparation and application of oxygen-carrying catalytic bifunctional particles in chemical looping combustion technology, specifically the use of perovskite oxygen carriers for the hydrogenation of CO2 to produce ethylene, propylene, and butene. The catalyst has suitable CO2 adsorption and dissociation capabilities, inhibiting olefin re-adsorption, reducing secondary olefin reactions, and improving olefin selectivity. The catalyst effectively inhibits the secondary hydrogenation of primary olefins, regulating the production of high-value-added C2-C4 lower carbon olefins.

The invention relates to the field of composite materials, in particular to a low-temperature-resistant polypropylene impact-resistant modified material, a preparation method thereof and an automobile part. The low-temperature-resistant polypropylene impact-resistant modified material provided by the invention is prepared from the following raw materials in parts by mass: 60-98 parts of homo-polypropylene; 5-15 parts of an ethylene-butylene copolymer elastomer; 1 to 10 parts of an SEPS elastomer; 0-30 parts, but not 0 part, of hydrated magnesium silicate; 0.1 to 1 part of a silane coupling agent; 0-8 parts of grafted polyethylene, but not 0 part; 0.1 to 1 part of an antioxidant; and 0.1-1 part of a processing aid. The low-temperature-resistant polypropylene anti-impact modified material provided by the invention can effectively improve the low-temperature-resistant and anti-impact properties, and meanwhile, good tensile property, bending property and high-temperature property are ensured.

The invention discloses a high-silicon EMT molecular sieve as well as a synthesis method and application thereof, and belongs to the technical field of molecular sieves. The synthesis method of the EMT molecular sieve comprises the following steps: a) mixing an aluminum source A1, a silicon source Si1, an alkali metal source M1, an organic template agent R1 and water to obtain a raw material I, and aging the raw material I to obtain a guiding agent; b) mixing an aluminum source A2, a silicon source Si2, an alkali metal source M2, an organic template agent R2 and water to obtain a raw material II, namely initial gel; and c) adding the guiding agent into the initial gel, uniformly stirring, and crystallizing in a sealed reaction kettle to obtain the high-silicon EMT molecular sieve with the EMT topological structure. The EMT molecular sieve provided by the invention has a silicon-aluminum oxide ratio of 7-30, high crystallinity and purity, and good hydrothermal / thermal stability, can be used for catalytic reactions such as production of high-octane gasoline by alkylation of isobutane / 2-butene, and has important significance in actual chemical production.

The invention discloses a polypropylene composite material as well as a preparation method and application thereof, and relates to the technical field of polypropylene materials. The polypropylene composite material comprises a polypropylene matrix and a toughening agent, the polypropylene matrix comprises homo-polypropylene and / or co-polypropylene; the toughening agent comprises a styrene-ethylene-butylene-styrene block copolymer and / or an ethylene-alpha-olefin copolymer; the melt mass flow rate of the homo-polypropylene measured under the conditions that the temperature is 230 DEG C and the load is 2.16 Kg is 20-50g / 10min; and the melt mass flow rate of the co-polypropylene measured under the conditions of 230 DEG C and 2.16 Kg load is 20-90 g / 10 min. The polypropylene composite material disclosed by the invention has the comprehensive properties of high modulus, high impact and low shrinkage.

The present invention discloses a hydroisomerization catalyst and a preparation method thereof, and a mixed C4 olefin hydroisomerization method, the hydroisomerization catalyst comprises a carrier and an active component loaded on the carrier, the carrier comprises a mixture of a carrier matrix and a modified metal, the modified metal is selected from at least one of VIB group metals, and the active component is selected from at least one of C4-C4 olefin and C4-C4 olefin. The active component comprises a metal M and / or an oxide thereof, and the metal M is selected from at least one of metal palladium, metal platinum, metal rhodium and metal ruthenium. The catalyst can catalyze the hydroisomerization conversion of butene-1 into butene-2, and has the advantages of high butene-1 conversion rate and high butene-2 selectivity.

A container closure, particularly a vacuum turnlock closure, comprises a sealing element containing or made of a polymer compound (excluding PVC). The polymer compound comprises at least one polybutene polymer, at least one polymer derived from at least partially 1,2-bonded isobutylene monomer, at least one (co)PP polymer, and optionally other components and additives. In a preferred embodiment, the polybutene polymer is a copolymer with ethylene in particular. In a preferred embodiment, the polybutene polymer has a Shore A hardness of less than 85.