102 results about "Butene" patented technology

A method for converting plastic waste into polypropylene includes (a) converting the plastic waste into a hydrocarbon liquid stream and a gaseous hydrocarbon stream in a catalytic pyrolysis unit, wherein the gaseous hydrocarbon stream is greater than about 60% by weight of the output and contains greater than about 40% by weight of light olefins; (b) introducing the gaseous hydrocarbon stream into one or more separation units to produce a first propylene stream, a first ethylene stream, a first butene stream, and a saturated gas stream, wherein the saturated gas stream contains C1 to C4 saturated hydrocarbons; (c) optionally, feeding the first propylene stream into a purification unit to produce a polymer-grade propylene stream; and (d) feeding the first propylene stream and, if present, the polymer-grade propylene stream into a polymerization unit to produce polypropylene.

This application discloses a method for preparing n-butene from isobutene, comprising the following steps: contacting a raw material containing isobutene with a catalyst and reacting to obtain a product containing n-butene; the catalyst is composed of MgAl2O4 and a hierarchical porous molecular sieve; and obtaining the catalyst through the following steps: 1) subjecting the molecular sieve to alkali treatment and acid treatment in sequence to obtain the porous molecular sieve; 2) wet mixing of magnesium source and aluminum source and calcining to obtain the MgAl2O4; 3) mixing the porous molecular sieve with the MgAl2O4 and calcining to obtain the catalyst.

The application discloses transparent polyethylene-butylene rubber granules, a preparation method and application thereof. Butadiene monomers are obtained by an anionic polymerization method to obtain BR raw glue liquid, and the BR raw glue liquid is subjected to catalytic hydrogenation to obtain polyethylene-butylene glue liquid; after the polyethylene-butylene glue liquid is concentrated by falling film evaporation, the transparent glue particles (EBBR) with a volatile matter content of less than or equal to 0.35% (mass fraction) are obtained by deep devolatilization and extrusion granulation through a double screw extruder, the EBBR has the characteristics of a wide molecular weight, non-crystallization, good elasticity, high strength and low volatile matter, and has excellent physical properties after being blended with PP and vulcanized, and simultaneously has good processing performance.

The application provides a method for preparing isobutylbenzene from benzene and butene, which comprises four reactions in sequence; the first reaction is to synthesize sec-butylbenzene from benzene and butene; the second reaction is to generate 2-phenyl-2-butene by dehydrogenation of sec-butylbenzene; the third reaction is to generate 2-methyl-1-phenylpropene by isomerization of 2-phenyl-2-butene; and the fourth reaction is to generate isobutylbenzene by hydrogenation of 2-methyl-1-phenylpropene; the butene comprises 1-butene and / or 2-butene. The method uses benzene and butene as raw materials, adopts a four-step continuous series fixed-bed reaction process to synthesize isobutylbenzene, is simple to operate, can realize continuous production, does not need to use the metal potassium-sodium catalyst used in the traditional isobutylbenzene synthesis process, has small safety risk, and is suitable for industrialized production of isobutylbenzene.

The application discloses a method for normalizing mixed C4 olefins containing isobutene. The method comprises the following steps: 1) adding 1-20wt% of tert-butyl alcohol into mixed C4 hydrocarbon; 2) feeding the obtained mixed raw material into a normalizing unit to generate normal butene under the conditions of 280-400 DEG C and normal pressure. The normalizing catalyst comprises the following components: a) 10-20wt% of a binder; and b) 80-90wt% of ZSM-35 molecular sieve. In the method, the tert-butyl alcohol can be hydrolyzed into isobutene and water in the reaction process, the isobutene can be used as the C4 raw material, the water can react with the C4 olefins to generate the intermediate product C4 alcohol, the C4 alcohol can be dehydrated to generate normal butene, and in addition, the water can play a role in inhibiting the hydrogenation of the raw material or the intermediate in the reaction system, thereby reducing the generation probability of alkanes and improving the selectivity of normal butene. The method can efficiently and stably convert the C4 olefins in the raw material into normal butene-rich product, and provides an effective way for synthesizing normal butene.

The present application relates to the field of hot melt adhesive, and provides a high-foaming hot melt adhesive as well as preparation and application thereof.The hot melt adhesive comprises polyolefin elastomer and functional polymer in a mass ratio of 40-90:1-10;the functional polymer is a copolymer of a first monomer and a second monomer;the first monomer is selected from one or more than two combinations of ethylene monomer, propylene monomer, butene monomer, hexene monomer and octene monomer;the second monomer is selected from one or more than two combinations of maleic anhydride, acrylic acid and acrylic acid derivative;and the content of the second monomer in the functional polymer is 1-30%.By adding the functional polymer with specific structure and content, the cohesive strength of the material is improved, the air bubbles in the foaming process can be supported, so that the foaming rate is improved, and the cohesive strength of the material is also improved.Meanwhile, the functional groups of the functional polymer can also increase the adhesion of the hot melt adhesive material to metal.

This invention relates to a triboelectric nanogenerator and its preparation method, belonging to the technical field of triboelectric nanogenerators. The preparation method includes the following steps: S1, dispersing styrene-ethylene-butene-styrene block copolymer, polyvinylidene fluoride, and MXene nanomaterials in a mixed solvent to obtain a negative friction layer spinning solution; S2, using dynamic pattern-induced multi-material nanofiber electrospinning technology, forming a negative friction layer from the negative friction layer spinning solution; S3, dispersing thermoplastic starch, sodium carboxymethyl cellulose, plasticizer, bis(2-hydroxyethyl) disulfide, and dithiothreitol in water to obtain a positive friction layer film-forming solution; S4, forming a positive friction layer from the positive friction layer film-forming solution; S5, bonding the micro-nano structures of the positive and negative friction layers face-to-face to obtain the triboelectric nanogenerator. This generator combines high output, long lifespan, and flexibility, and can be adapted to diverse scenarios such as wearable electronics, industrial high-temperature sensing, and environmental mechanical energy harvesting.

The application relates to the field of polybutene, and provides a long-chain branched 1-butene / alpha-olefin copolymer and a preparation method thereof. The 1-butene / alpha-olefin copolymer contains a structure of omega-olefin-based dihalosilane inserted into a main chain of the 1-butene / alpha-olefin copolymer, and the molar percentage content of Si atoms in the 1-butene / alpha-olefin copolymer is 0.0001 ‰-1 ‰. The H type long-chain branched 1-butene / alpha-olefin copolymer has high creep resistance and mechanical properties.

One embodiment of the present disclosure relates to a 3-methyl-1-butene copolymer, said copolymer comprising a constituent unit which is derived from 3-methyl-1-butene and a constituent unit which is derived from an α-olefin (excluding 3-methyl-1-butene), and having at least one melting point Tm(°C) as measured by differential scanning calorimetry, wherein expression (1) is satisfied.　Expression (1): Tm1≥-1.8α+300 (In expression (1), Tm1 indicates the melting point when there is one melting point Tm(°C), or the lowest melting point (°C) among a plurality of melting points when there are two or more melting points Tm(°C), and α indicates the content ratio (mol%) of the constituent unit which is derived from the α-olefin as calculated with an FT-IR calibration curve.)

This invention relates to the field of C4 separation, specifically to a method and system for producing 1-butene from mixed C4 streams. The method includes: S1. Distilling the mixed C4 streams to obtain a 1-butene-rich stream, a butadiene-containing stream, and a heavy C4 stream; S2. Removing light components from the 1-butene-rich stream to obtain a 1-butene product stream; S3. Selectively hydrogenating the butadiene-containing stream to obtain a selectively hydrogenated product stream; S4. Performing a double bond isomerization reaction on at least a portion of the heavy C4 stream to obtain a double bond isomerization product stream; wherein the selectively hydrogenated product stream and the double bond isomerization product stream are returned to step S1 for the distillation separation. This invention simplifies the process flow, reduces investment, lowers system energy consumption, and achieves efficient recovery of 1-butene and efficient utilization of 2-butene.

The application discloses a production process of trans-zeatin, which comprises the following steps: refluxing E-2-(4-hydroxy-3-methyl-2-butene)-phthalimide with sodium hydroxide in methanol to obtain (E)-4-amino-1-hydroxy-2-methyl-2-butene; filtering and collecting the filtrate and concentrating the filtrate; and reacting the concentrated filtrate with 6-chloropurine in n-propanol and triethylamine as an acid-binding agent to finally obtain trans-zeatin. The application uses E-2-(4-hydroxy-3-methyl-2-butene)-phthalimide as a raw material, and high-purity trans-zeatin is obtained through two steps. The preparation method can effectively improve the yield of trans-zeatin, is simple and convenient to operate, is convenient for industrial popularization, and has good economic and social benefits.

This invention discloses a mica adhesive and its process for battery insulation covers, relating to the field of power battery materials technology. The mica adhesive for battery insulation covers is prepared by coating a mica tape as a carrier with an adhesive compound. The adhesive compound comprises the following raw materials in parts by weight: 35-40 parts modified styrene-ethylene-butene-styrene block copolymer, 25-30 parts modified terpene resin, 25-30 parts mica powder, 6-10 parts aluminum hydroxide, 4-8 parts ammonium polyphosphate type II, 2-3 parts silane coupling agent KH-550, 3-4 parts dioctyl phthalate, 0.4-0.8 parts antioxidant 1010, 0.2-0.6 parts ultraviolet absorber UV-531, 45-55 parts anhydrous toluene, and 20-35 parts anhydrous ethanol. This adhesive exhibits excellent compatibility and dispersibility, superior adhesion and flame retardancy, and a stable preparation process, making it suitable for the stringent requirements of power battery insulation covers.

The application provides an electrolyte, an electrochemical device containing the electrolyte and an electronic device. The electrolyte comprises ethylene carbonate, propylene carbonate and fluoroethylene carbonate. The mass percentage of ethylene carbonate is a, 1.0% <= a <= 20%, the mass percentage of propylene carbonate is b, 12% <= b <= 35%, based on the mass of the electrolyte. The electrolyte further comprises an additive B. The additive B comprises at least one of butanedinitrile, hexanedinitrile, 1,4-dicyano-2-butene, ethylene glycol dicyan ether, 1,3,6-hexanetrimethylnitrile or 1,2,3-tris(2-cyanooxy)propane. The mass percentage of the additive B is 0.5% to 4%, based on the mass of the electrolyte. The electrochemical device with the electrolyte has good high-temperature storage performance and cycle performance.

Described herein are embodiments where crude oil and cooking oil may be co-processed in a method that includes catalytically cracking a hydrocarbon mixture to form hydrocarbon product. The hydrocarbon mixture may include from 1 wt. % to 20 wt. % of cooking oil and from 80 wt. % to 99 wt. % of crude oil having an API gravity of from 30° to 38°. The hydrocarbon product may include ethylene, propylene, and butenes.

This invention relates to the field of fiber processing technology and discloses a near-infrared shielding elastic fiber and its preparation method. The method includes: (1) drying and melt spinning a styrene-ethylene-butene-styrene block copolymer to obtain an elastic fiber; and mixing MXene, dopamine hydrochloride and a dispersant in the presence of a solvent to obtain an impregnation solution; (2) impregnating the elastic fiber in the impregnation solution to obtain the near-infrared shielding elastic fiber. The near-infrared shielding elastic fiber prepared by the method provided by this invention has excellent near-infrared shielding effect and mechanical properties, and the preparation method provided by this invention is simple and has good economic value and application prospects.

This description provides titanium complexes containing 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one activatable ligand. The use of the complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene, or 1-octene) and enable the production of high molecular weight copolymers (Mw greater than 25,000) with high productivity under solution polymerization conditions.

The present invention relates to an ethylene / butene copolymer exhibiting excellent processability and adhesive properties, and to an adhesive composition comprising same.

The present disclosure relates to a polyolefin composition comprising: A) from 99.5% to 60% by weight of a recyclate polyolefin component containing not less than 80% by weight of a waste material selected from polyethylene, polypropylene or their mixtures; B) from 0.5% to 40% by weight of an ethylene copolymer having: 1) a 1-butene from 15% to 45% by weight; 2) density from 0.840 to 0.910 g / cm3; 3) Melt Flow Rate E from 0.1 to 15 g / 10 min., preferably from 0.3 to 12 g / 10 min., measured according to ISO 1133-1 2012-03 at 190 °C, with a load of 2.16 kg; 4) product r1ꞏr2 of the reactivity ratios obtained from 13C NMR triad distribution, from 0.55 to 0.95, where r1 is the reactivity ratio of ethylene to 1-butene and r2 is the reactivity ratio of 1-butene to ethylene.

This invention provides a noble metal catalyst, its preparation method, and its application, belonging to the field of catalytic dehydrogenation technology. The invention provides a method for preparing a noble metal catalyst, comprising the following steps: mixing foamed silicon carbide, carbon nanotubes, and molecular sieves to obtain a composite support; mixing the composite support with a ruthenium-containing precursor solution for loading to obtain a support loaded with the precursor; and calcining the support loaded with the precursor to obtain the noble metal catalyst. This invention utilizes multiple supports to synergistically improve the catalytic activity of the noble metal catalyst; loading noble metals onto the composite support further enhances the catalyst's catalytic activity. Experimental results show that when the noble metal catalyst prepared by this invention is applied to the catalytic conversion of butene to butadiene, the butene conversion rate is 84.1–89.3%, the butadiene selectivity is 96.5–98.9%, and the stable operating time is 2100–2300 h.

The present disclosure relates to an ethylene copolymer for use as an additive, in particular an impact modifier, for polyolefin compositions, having the following characteristics: 1) a 1-butene content C4 cont from 15% to 45% by weight 3 ; 2) a density from 0.840 to 0.910 g / cm 13 ; 3) a melt flow rate E from 0.1 to 15 g / 10 min; 4) a product of reactivity r1 · r2 from 0.55 to 0.95, obtained from the C NMR triad distribution, where r1 is the reactivity of ethylene with 1-butene and r2 is the reactivity of 1-butene with ethylene.

A masterbatch composition is provided comprising: A) 25 wt% to 80 wt% of a butene-1 polymer composition comprising: a) a butene-1 homopolymer or copolymer having a copolymerized comonomer content (CA) of up to 5 mol%, and b) a butene-1 copolymer having a copolymerized comonomer content (CB) of greater than 5 mol% to 25 mol%, wherein the amount of polymer a) ranges from 5 wt% to 95 wt%, said butene-1 polymer composition having: i) a total copolymerized comonomer content of 4 mol% to 18 mol%, and ii) a fraction soluble in xylene at 0°C of 35 mol% to 90 mol%, iii) a melt flow rate value of 30 to 1000 g / 10 min; B) 20 wt% to 75 wt% of at least one endothermic chemical blowing agent; and C) 0 wt% to 50 wt% of at least one nucleating agent.

The application provides a carbon four 1-butene and methanol olefin heat coupling utilization equipment, and relates to the technical field of heat coupling utilization equipment, which comprises an adjusting mechanism, the adjusting mechanism comprises a supporting rod, and the arc surface one end of the supporting rod is fixedly connected with one side of a heat coupling utilization equipment body. During the operation of the heat coupling utilization equipment body, the water inlet pipe filter screen is blocked, and the equipment needs to be stopped, disassembled and replaced, which will affect the continuous operation of the equipment and the heat exchange efficiency. The filter mechanism can drive the filter plate to be inserted into or withdrawn from the water inlet pipe through the cylinder driving movable base, the elastic sliding plate and the positioning strip cooperate to lock the filter plate in the working position, the online quick replacement of the filter plate is realized, the problem that the filter screen replacement needs to be stopped, disassembled and affects the heat exchange efficiency is solved, the beneficial effects of the online plug-in replacement of the filter plate, the operation without disassembly, the stable locking to prevent loosening, the guarantee of the continuous and stable operation of the equipment and the heat exchange efficiency are achieved.

This application discloses a three-layer co-extruded infusion membrane for liquid-liquid multi-chamber bags and its preparation method. The three-layer co-extruded infusion membrane provided in this application comprises an outer layer, a middle layer, and an inner layer. The outer layer material is a mixture of homopolymer polypropylene, a low-ethylene-content ethylene-propylene polymer, and SEBS or SEPS. The middle layer material is a mixture of a high-ethylene-content ethylene-propylene polymer, a low-ethylene-propylene polymer, and SEBS or SEPS. The inner layer material is a mixture of an ethylene-propylene-butene polymer, a high-ethylene-content ethylene-propylene polymer, a low-ethylene-propylene polymer, and SEBS or SEPS. The infusion membrane provided in this application exhibits excellent flexibility, stable solid weld strength, and weak weld strength.

This invention belongs to the field of fluorochemical technology, specifically relating to a method for preparing cis-1,1,1,4,4,4-hexafluoro-2-butene. The method includes the following steps: I. Reacting 3,3,3-trifluoropropylene with carbon tetrachloride under light irradiation, optionally in the presence of a first catalyst, to obtain 1,1,1,3-tetrachloro-4,4,4-trifluorobutane; II. Reacting the obtained 1,1,1,3-tetrachloro-4,4,4-trifluorobutane with hydrogen fluoride in the presence of a second catalyst to obtain cis-1,1,1,4,4,4-hexafluoro-2-butene. The first step of this method uses a light-driven addition reaction, and the photocatalytic approach significantly reduces production costs. It can also be combined with a dedicated catalyst to improve reaction efficiency. The second step, the fluorination reaction, is adapted to a specific catalyst, which can effectively improve the conversion rate of the reactants and the selectivity of the target product, ensuring the overall high efficiency of the preparation process.

This invention relates to the field of zeolite synthesis, disclosing a MER zeolite catalyst, its preparation method and application, and a method for the dimerization of 2-methyl-2-butene. The MER zeolite catalyst has an average crystallite diameter of 0.1-0.3 μm, an average aspect ratio of 10-50, and a crystallinity of 90-100%; the molar ratio of silicon to aluminum in the MER zeolite catalyst is 1-2.45:1. The MER zeolite catalyst provided by this invention has good crystallinity, is free of zeolite impurities such as CHA, ANA, and LTL, and exhibits high 2-methyl-2-butene conversion and dimer selectivity in the dimerization reaction of 2-methyl-2-butene.