255 results about "Butene" patented technology

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.

Systems and methods for the preparation of (Z)-1, 1, 1, 4, 4, 4-hexafluoro-2-butene are provided. Compositions prepared according to one or more of the systems and methods described herein and methods of using these compositions are also provided.

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.

A method of selectively producing oligomers can include contacting at least one antifouling agent with a first amount of at least one aluminum alkyl compound to form at least one antifouling compound comprising the following structure or dimer form thereof: (I); and adding the at least one antifouling compound, an additional amount of the at least one aluminum alkyl compound, the at least one titanate compound, and ethylene to a jet loop reactor to oligomerize the ethylene to produce one or more of 1-butene, 1-hexene, or 1-octene. (I)

The invention relates to a method and device for preparing low-carbon olefins, and the method comprises the following steps: S1, contacting raw oil with a catalytic conversion catalyst in a catalytic conversion reactor for catalytic conversion reaction to obtain a catalytic conversion reaction product; s2, separating the catalytic conversion reaction product to obtain ethylene and propylene as well as a first circulating olefin flow containing butene and / or a second circulating olefin flow containing C5 + olefin; s3, enabling the olefin material to enter an etherification unit, and contacting the olefin material with an alcohol raw material under an etherification condition to obtain a circulating ether material and etherified olefin; and S4, enabling at least one part of etherified olefin to enter an isomerization unit, and carrying out isomerization reaction in the presence of an isomerization catalyst to obtain isomerized olefin. According to the method disclosed by the invention, the conversion of ethers into low-carbon olefins can be realized, the yield and selectivity of ethylene and propylene are improved, the yield of methane is reduced, the content of methanol in the product is reduced to the greatest extent, and the conversion of low-cost methanol into low-carbon olefins is realized.

The invention relates to a heterophasic polypropylene composition with high melting temperature, moderate softness and high impact strength. Specifically, the present invention relates to a heterophasic polypropylene composition comprising a propylene copolymer (A) matrix of propylene with ethylene and 1-butene comonomer units and a propylene ethylene elastomer (B) dispersed in the matrix. Furthermore, the present invention relates to a process for preparing said heterophasic polypropylene composition in the presence of a Ziegler-Natta catalyst, as well as to articles comprising said heterophasic polypropylene composition and to the use of said heterophasic polypropylene composition in articles.

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 butylene determination pretreatment device provided by the invention comprises: a sample introduction system, wherein the sample introduction system comprises a steel cylinder for containing a sample and a pretreatment sample introduction device communicated with the steel cylinder; the pretreatment sampling device is located at the front end of the waste gas treatment system, and the waste gas treatment system is connected with the pretreatment sampling device through a switching valve and a pipeline; the detection system comprises a gas chromatograph and a gas source which are connected, and the pretreatment sampling device is connected with the detection system; the pretreatment sampling device comprises a purification module, a heating module and a pressure reduction module which are connected, the purification module is connected with the steel cylinder, the heating module is arranged on the right side of the purification module, the pressure reduction module is arranged on the right side of the heating module, and the pressure reduction module is connected with the waste gas treatment system and the gas chromatograph; the waste gas treatment system comprises an adsorption device, a gas collection part and a flow control part; non-uniform sample gasification is avoided through the pretreatment sampling device, the obtained gas analysis result is good in repeatability, and a waste gas treatment device is added to complete sample purification.

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.

A process for converting whole crude oil and other heavy hydrocarbon streams to produce ethylene is provided. The process includes feeding a hydrotreated mid-boiling fraction, a hydrotreated resid 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 a C1-C3 stream and a mixed C4 and C4 + stream comprising isoolefins, olefins and dienes are recovered, and the mixed C4 and C4 + stream is fed to a second separator and a mixed C4 stream comprising isoolefins, olefins and C4 + streams is recovered. A portion of the mixed C4 stream is dimerized in a dimerization unit to produce a dimerization product stream, hydrogenated in a total hydrogenation system to produce a hydrogenated dimerization product stream, and cracked in a thermal cracking reactor system to produce one or more of hydrogen, methane, ethylene, propylene, n-butene, and isobutene.

The utility model provides a liquid 1-butene vaporization device, and relates to the technical field of chemical raw material quality inspection, the liquid 1-butene vaporization device comprises a sampling steel cylinder, a vaporization chamber, a non-adsorption aluminum foil gas bag and a six-way gas sample injection valve, the device ensures the controllability of the total amount of vaporized sample gas and the consistency of the composition proportion by accurately quantifying a liquid sample, and the liquid 1-butene vaporization device is simple in structure and convenient to operate. By means of complete vaporization of the vaporizing chamber and buffering of the non-adsorption aluminum foil air bag, vaporized sample components are mixed evenly, light and heavy components of a gas sample collected by the six-way gas sample injection valve are distributed evenly, the sample detection accuracy is ensured, the sample cannot be adsorbed in the sampling process, and the sampling efficiency is improved. According to the device, a taken sample can be completely vaporized through the vaporizing chamber, and a completely vaporized gaseous sample can be completely transferred through the arrangement of the one-way valve, so that errors cannot be caused to later detection of the sample, and the problems that in the prior art, a detection result is deviated, and errors are easily caused to later detection of the sample are solved.

The invention belongs to the technical field of preparation of quinazolinone. The invention provides a method for preparing butene substituted quinazoline-4 (3H)-ketone, which is characterized in that a spiro-2, 3-dihydroquinazoline-4 (1H)-ketone compound, sodium bicarbonate, 4DPAIPN and dimethyl sulfoxide are subjected to a reaction together. According to the method provided by the invention, additional addition of a metal catalyst, a ligand and an additional oxidant is not needed, reaction conditions are relatively mild, an operation process is relatively simple and convenient, post-treatment is relatively easy, side reactions possibly caused under high temperature and strong oxidation conditions can be reduced, and potential problems caused by metal residues and use of the oxidant are reduced.

Described herein are methods for converting butene. In some embodiments, butene is converted to an ethylene-containing products. In additional embodiments, butene is converted to an propylene-containing products. In additional embodiments, butene is selectively converted to an ethylene-containing product and a propylene-containing product. These methods generally include metathesis and cracking reactions, as described.

The invention discloses a polypropylene composite material which comprises the following components in parts by weight: 48-62 parts of co-polypropylene; 15-25 parts of an inorganic filler; 15 to 20 parts of POE (Polyolefin Elastomer); 3 to 6 parts of styrene-ethylene-butylene copolymer; and 2-3 parts of a scratch-resistant agent. The co-polypropylene with the rubber phase content of 7-18 wt%, the POE with the specific content and the styrene-ethylene-butylene copolymer with the number-average molecular weight of 100,000-23,000 are selected for synergistic effect, and the polypropylene composite material with low gloss, good blasting resistance and scratch resistance can be obtained and is suitable for preparing instrument boards.

The invention relates to the technical field of dichlorooctafluorobutane, and provides a preparation process of 2, 3-dichlorooctafluorobutane, and the preparation process comprises the following steps: S100, adding a fluorine phase into a polar phase, and carrying out shearing treatment to obtain a microemulsion; s200, carrying out photoelectric synergistic activation treatment on the microemulsion to obtain 2, 3-dichlorooctafluorobutane; wherein the polar phase comprises a solvent, an electrolyte, a photocatalyst and a stabilizer; the fluorine phase comprises a fluorine-containing substrate, an inert fluorine solvent and a fluorine-containing surfactant. According to the preparation method, the fluorine phase is added into the polar phase containing the photocatalyst and the electrolyte, a stable micro-emulsion system with a nanoscale interface is formed through high-speed shearing, and then photoelectric synergistic activation is implemented, so that precise regulation and control on a perfluoro-2-butene chloride addition reaction path are realized, and the synthesis efficiency and selectivity of the 2, 3-dichlorooctafluorobutane are remarkably improved.

The invention discloses a ferromagnetic element-doped lanthanum oxychloride two-dimensional material and a preparation method and application thereof, and belongs to the technical field of chemical catalysis, and the method comprises the following steps: dissolving lanthanum acetylacetonate and cobalt salt in oleylamine, uniformly mixing, adding a lanthanum chloride solution into a mixed system, and heating and stirring for reaction in an inert gas atmosphere to obtain a lanthanum oxychloride two-dimensional material; the heating temperature is 300-350 DEG C, the reaction time is 2-15 hours, and washing and drying the obtained product to obtain the ferromagnetic element doped lanthanum oxychloride two-dimensional material. The method is simple in step and mild in reaction condition, and the prepared ferromagnetic element doped lanthanum oxychloride two-dimensional material shows a two-dimensional ferromagnetic Moire superlattice structure at room temperature and can be used for producing high-added-value products such as acetaldehyde, propylene and butylene through photocatalytic conversion of CO2.

The invention relates to a C4 hydrocarbon fraction fine desulfurization method and a reaction device. The method comprises the following steps: mixing an oxidizing agent with naphtha to obtain oxidizing agent carrying oil; the C4 hydrocarbon fraction, the oxidant carrying oil and a mercaptan conversion auxiliary agent enter an oxidation reactor to be subjected to an oxidation reaction, and mercaptan is converted into disulfide; the material flow after the oxidation reaction is subjected to two-stage rectification separation, a high-quality fine desulfurization light C4 hydrocarbon fraction is obtained after first-stage rectification, and a fine desulfurization heavy C4 hydrocarbon fraction and sulfur-containing naphtha are obtained after second-stage rectification. According to the C4 hydrocarbon fraction fine desulfurization method provided by the invention, the possibility that the C4 hydrocarbon fraction and the oxidant are mixed to form explosive gas is avoided, and the safety of the oxidative desulfurization process is improved. And carrying out two-stage rectification separation to obtain a high-grade fine desulfurization light C4 hydrocarbon fraction with isobutene as a main component and a fine desulfurization heavy C4 hydrocarbon fraction with cis-2-butene / trans-2-butene as a main component, so as to meet the requirements of different users for utilizing the C4 hydrocarbon fractions.

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 invention discloses a chilled water heat exchange system and method.The system comprises a flash valve, a compressor, a first recovery device, a second recovery device and a third recovery device, the first recovery device, the second recovery device and the third recovery device are sequentially communicated and used for circulating chilled water, and the first recovery device comprises a first heat exchanger and a second heat exchanger which are arranged in parallel; the first recovery device comprises at least one heat utilization device with chilled water as a heat source, the second recovery device comprises at least one heat utilization device with chilled water as a heat source, the third recovery device comprises a third heat exchanger, and the first heat exchanger, the second heat exchanger, the third heat exchanger, the flash valve and the compressor are communicated in sequence to form a heat exchange loop for butene circulation, the butene is used to heat the chilled water flowing through the first heat exchanger and the second heat exchanger and to cool the chilled water flowing through the third heater. According to the application, effective utilization of low-grade heat energy of the quenched water can be realized.

The present invention provides a C4 fraction selective hydroisomerization catalyst, which comprises a carrier and an active component loaded on the carrier, and the carrier is a metal composite oxide modified by an organic cation quaternary ammonium salt and a silane reagent; the metal composite oxide contains a metal element I, and the metal element I comprises aluminum and titanium; the active component contains a metal element II, the metal element II comprises a main active component Cu and an optional auxiliary active component, and the auxiliary active component comprises Ni, Ru and alkali metal. According to the selective hydrogenation catalyst provided by the invention, the carrier is modified, so that the dispersion of the active components on the surface of the carrier can be remarkably improved, and the active components are controlled to exist in a nanocluster form on the surface of the carrier, so that the low-temperature activity of the catalyst prepared from the carrier precursor is remarkably improved. The invention also provides a preparation method and application of the C4 fraction selective hydrogenation isomerization catalyst, and a method for removing butadiene and preparing 1-butene through C4 fraction selective hydrogenation.

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.

The invention belongs to the technical field of fine chemical production, and provides aluminum dibutenyl phosphinate as well as a preparation method and application thereof. The dibutenyl aluminum phosphinate disclosed by the invention has the following structural formula. The aluminum dibutenyl phosphinate has the advantages of high carbon formation, high flame retardant efficiency and small addition amount. The invention also provides a preparation method of aluminum dibutenyl phosphinate. According to the preparation method, a first-stage butenylation reaction, a second-stage butenylation reaction and a third-stage butenylation reaction are sequentially carried out in a butadiene atmosphere. Due to the fact that the speed of the addition reaction is low when the pressure of gasified butadiene is 0.2-0.3 MPa, a mode of gradient temperature rising is adopted for firstly preparing a butene intermediate, then the temperature is increased, and then the other stage is carried out, safe production is guaranteed, impurity production is avoided, and high-purity aluminum dibutenyl phosphinate can be obtained after solid-liquid separation. Meanwhile, the preparation method is simple and suitable for industrial production. .

Provided is a copolymer rubber composition from which a crosslinked molded article having well-balanced and excellent properties in terms of low hardness, small compression set at low temperatures, and high abrasion resistance can be obtained. [Solution] The copolymer composition comprises 100 parts by mass of an ethylene-α-olefin-non-conjugated polyene copolymer (P) having structural units derived from ethylene [A1], structural units derived from an α-olefin [A2] having 4 to 20 carbon atoms, and structural units derived from a non-conjugated polyene [A3], wherein the [A2] contains 1-butene, and satisfies the following (1) and (2): (1) the ratio [[e] / [x]] of the molar fraction [e] of the structural units derived from ethylene [A1] to the molar fraction [x] of the structural units derived from the α-olefin [A2] having 4 to 20 carbon atoms is 40 / 60 to 90 / 10; and (2) the intrinsic viscosity [η] measured in decalin at 135°C is 5.0 to 7.0 dl / g.

The invention discloses an efficient preparation method of perdeuterated 3-methyl-3-butene-1-alcohol. The efficient preparation method comprises the following steps: S1, preparing deuterated 3-methyl-2-ethyl crotonate; s2, carrying out isomerization treatment on the deuterated 3-methyl-2-ethyl crotonate, and introducing a deuterium atom by taking deuterium water as a deuterium source, so as to obtain the deuterated 3-methyl-3-ethyl crotonate; and S3, under the water-free and oxygen-free conditions, carrying out reduction treatment on the deuterated 3-methyl-3-ethyl crotonate by adopting a deuterated reducing agent, so as to obtain the perdeuterated 3-methyl-3-butene-1-ol. According to the method, the perdeuterated 3-methyl-3-butene-1-ol can be prepared easily, mildly and efficiently, and technical support is provided for isotope labeling research of a terpenoid biosynthesis mechanism.

The invention belongs to the technical field of petrochemical industry, and discloses an energy-saving method and device for refining 1-butene from etherified C4. The method comprises the following steps: carrying out selective hydrogenation on etherified C4 to remove butadiene, feeding the etherified C4 into a pretreatment tower adopting a heat pump technology for primary separation, and extracting a fraction rich in 1-butene from a side line; the fraction enters an extractive distillation tower, and efficient separation of 1-butene and butane is achieved by adding an extractant; the rich solution containing 1-butene is separated by a product tower to obtain a high-purity 1-butene product; and the high-temperature lean solvent extracted from the bottom of the product tower sequentially flows through a plurality of heat exchange devices such as an intermediate reboiler of the extractive distillation tower, a second reboiler of the pretreatment tower, a raw material preheater and the like, and is recycled after waste heat is fully recovered. The invention also provides an alternative scheme for additionally arranging the solvent recovery tower and a corresponding device. The process flow is reasonable, the energy integration level is high, the consumption of steam and cooling water can be greatly reduced, and the obvious energy-saving effect and economical efficiency are achieved.

The invention discloses a method for separating raffinate containing a C5 fraction mixture, which relates to the field of chemical engineering and comprises the following steps of: contacting a mixture of olefin and alkane with an adsorbent under an adsorption separation condition; the adsorbent is a hydrogen type Beta zeolite molecular sieve, and the molar ratio of silicon to aluminum is 25; according to the separation method of the raffinate containing the C5 fraction mixture, H-Beta zeolite with a specific silica-alumina ratio shows extremely high selective adsorption capacity to C5 olefins (such as 1-pentene and 2-methyl-1-butene) by utilizing a unique pore structure and an acidic site of the H-Beta zeolite, and adsorption to alkanes is relatively weak, so that efficient separation is realized. Experiments show that the separation selectivity coefficient of the adsorbent on an olefin / alkane mixture is obviously higher than that of a traditional adsorbent.

The invention discloses a preparation method for generating 1-butene by isomerization of 2-butene, and the preparation method comprises the following steps: activating a catalyst, and reacting with 2-butene to obtain 1-butene; the catalyst is a metal-ZSM-22 molecular sieve catalyst. According to the present invention, the 1-butene is generated through the 2-butene isomerization, such that the ideal 2-butene conversion activity and the excellent 1-butene selectivity are provided; the catalyst is simple in composition and easy for large-scale application, and has a good industrial application prospect.

In some embodiments, a blowing agent blend for use in a polyurethane foam formulation comprises E-1-chloro-3, 3, 3-trifluoropropene (HCFO-1233zd-E) and at least one of E-1, 1, 1, 4, 4, 4-hexafluoro-2-butene (HFO-1336mz-E) and Z-1, 1, 1, 4, 4, 4-hexafluoro-2-butene (HFO-1336mz-Z). The blowing agent blend may be used in a polyurethane foam formulation. The polyurethane foam comprises a plurality of polymer cells and a blowing agent blend. In some embodiments, the polyurethane foam exhibits a thermal conductivity at 35 DEG F of not greater than 0.120 BTU in / ft2 hr DEG F. A method of forming a polyurethane foam includes combining at least one isocyanate and a polyol resin blend to initiate polymerization and form the polyurethane foam. The polyol resin blend comprises a polyol premixed blend and the blowing agent.

The present application relates to a microporous breathable film, the microporous breathable film is formed by a polymer composition, and the microporous breathable film is liquid impermeable under atmospheric pressure, the thickness of the microporous breathable film is 5 μm to 50 μm.Based on 100 parts by weight of the polymer composition, the polymer composition comprises: (a) 30-40 parts by weight of polyethylene; (b) 40-60 parts by weight of ethylene-butene polymer; (c) 10-20 parts by weight of poly (ethylene-co-1,2-butene) glycol.The present application also relates to a preparation method of the microporous breathable film, and application of the microporous breathable film.