27results about "Hydrocarbon by aliphatic/cycloaliphatic split-off" patented technology

The present disclosure relates to processes for converting saturated polyethylene to at least one olefin product. The process comprises contacting the saturated polyethylene with three or more catalyst components in a reactor, the reactor comprising olefin reactants. The three or more catalyst components include a metathesis catalyst component, an isomerization catalyst component, and a dehydrogenation catalyst component. The contacting causes at least a portion of the saturated polyethylene to undergo a dehydrogenation reaction to form an unsaturated polyethylene, and at least a portion of the unsaturated polyethylene, or a product derived therefrom, to undergo a metathesis reaction and an isomerization reaction to produce an effluent comprising at least the olefinic product.

The present disclosure relates to a process for converting unsaturated polyethylene into at least alkene products. The process includes contacting the unsaturated polyethylene with two or more catalyst components in a reactor containing an alkene reactant. The two or more catalyst components include a metathesis catalyst component and an isomerization catalyst component. By the contacting, at least a portion of the unsaturated polyethylene or a product derived therefrom undergoes a metathesis reaction and an isomerization reaction to produce an effluent containing at least alkene products.

Disclosed are a solid acid catalyst, and preparation and use thereof, wherein the catalyst comprises: a) a metal oxide carrier; and b) at least one modifying metal component; wherein, when the catalyst is characterized by solid nuclear magnetic resonance with trimethylphosphine as the probe molecule, it exhibits a spectral peak in the range of -5 to -20 ppm. The catalyst can be used for hydrocracking reaction of non-aromatic hydrocarbons, and has the advantages of high conversion rate and low side reactions.

The application provides a photo-thermal synergistic catalyst for polyolefin cracking, a preparation method thereof and a polyolefin cracking method. The preparation method comprises the following steps: dropping a transition metal salt solution into carbon nanotubes, carrying out first drying and calcination treatment to obtain a calcination product; mixing the calcination product with a directing agent solution, adjusting the pH value to 9-10, and then adding a silicon source; after first centrifugal separation and refluxing to remove the directing agent, performing activation treatment on the obtained product to obtain the photo-thermal synergistic catalyst for polyolefin cracking. The application can load transition metal active sites on the carbon nanotube substrate and coat a porous silica protective layer, so that a catalyst with the advantages of photo-catalysis and thermal catalysis can be prepared, and the requirements of anti-carbon deposition and anti-sintering design can be met, thereby effectively preventing carbon deposition and sintering, prolonging the service life of the catalyst, and solving the problems of low catalytic efficiency and high energy consumption in polyolefin pyrolysis.

The invention relates to the technical field of plastic recycling, in particular to a method for recycling alkane in plastic through plasma degradation, and the method comprises the following steps: S1, fully mixing an MCN molecular sieve catalyst with the plastic in a grinding manner to obtain a solid-phase mixture; s2, placing the solid-phase mixture in a plasma reaction kettle, introducing nitrogen, setting the voltage of a reaction power supply of the plasma reaction kettle to be 35-40V and the power of the reaction power supply to be 70-75W, pretreating the solid-phase mixture through plasmas, and reacting for 40-90min to obtain a solid-liquid mixture; s3, adding an organic solvent which is normal hexane, tetrahydrofuran or dichloromethane, carrying out vortex treatment for 4-6 minutes, then carrying out centrifugal operation, and collecting a liquid product; s4, the liquid product is subjected to rotary evaporation, distillates are collected, and the distillates are recycled liquid alkanes, the alkane in the plastic can be recycled under the low-temperature condition, and the method has the advantages of being easy to operate and high in recycling rate.

The invention discloses a preparation method of high-purity hexadecahydropyrene, which comprises the following steps: (1) carrying out hydrofining reaction on direct coal liquefaction oil and hydrogen to obtain hydrofined oil; (2) carrying out hydrogenation mild cracking reaction on the hydrofined oil obtained in the step (1) to convert polycycloalkane and / or polycyclic aromatic hydrocarbon with side chains in the hydrofined oil into polycycloalkane and / or polycyclic aromatic hydrocarbon with broken side chains, so as to obtain hydrogenation mild cracking effluent; (3) carrying out further hydrofining reaction on the hydrogenation mild cracking effluent obtained in the step (2) to obtain hydrofinishing effluent; (4) feeding hydrofinishing effluent obtained in the step (3) into a rectification unit, and separating to obtain fraction at 280-320 DEG C as hexadecahydropyrene-rich oil; and (5) feeding the hexadecahydropyrene-rich oil obtained in the step (4) and the extraction solvent into a recrystallization tower for extraction crystallization, and filtering to remove a mixture of the extraction solvent and oil in the hexadecahydropyrene-rich oil to obtain high-purity hexadecahydropyrene.

This disclosure relates to processes for converting unsaturated polyethylene to at least an alkene product. The processes comprise contacting the unsaturated polyethylene with two or more catalyst components in a reactor comprising an alkene reactant. The two or more catalyst components comprise a metathesis catalyst component and an isomerization catalyst component. Contacting causes at least a portion of the unsaturated polyethylene, or products derived therefrom, to undergo metathesis reactions and isomerization reactions to produce an effluent comprising at least the alkene product.

The present disclosure relates to a process for converting unsaturated polyethylene into at least alkene products. The process includes contacting the unsaturated polyethylene with two or more catalyst components in a reactor containing an alkene reactant. The two or more catalyst components include a metathesis catalyst component and an isomerization catalyst component. By the contacting, at least a portion of the unsaturated polyethylene or a product derived therefrom undergoes a metathesis reaction and an isomerization reaction to produce an effluent containing at least alkene products.

Biorenewable feeds enriched in free fatty acids are produced by hydrodeoxygenating biorenewable feedstocks using Group VIII catalysts to produce products with 10-13 carbon atoms and high levels of linearity. Normal paraffins in the range desired by the detergent industry can be produced. Either isomerization or iso-linear separation can be performed to provide green fuel streams.

The disclosure provides an improved method for preparing monoalkylated cyclopentadiene species in high yield and selectivity. In the process, either a solution of dicyclopentadiene magnesium or a cyclopentadiene magnesium halide is reacted with an alkylating agent in the presence of a modifying agent to provide the monoalkylated product. In the process of the disclosure, only a mono-alkylated species is produced with no detectible amount of dialkylated product observed.

An upcycling system for converting plastic waste to value-added aromatic products and process of using same. The system includes a plug-flow reactor with catalytic hydrocracking functionality. Zeolite catalysts can be used to convert the plastic waste, for example marine plastic waste, into aromatic products such as benzene, toluene and / or xylene.

The present disclosure provides an improved method for preparing monoalkylated cyclopentadiene species in high yield and high selectivity. In this method, a solution of either dicyclopentadiene magnesium or cyclopentadiene magnesium halide is reacted with an alkylating agent in the presence of a modifier to provide a monoalkylated product. In the method of the present disclosure, only monoalkylated species are produced and no detectable amount of dialkylated product is observed.

A solid acid catalyst, its preparation, and its use are disclosed. The catalyst comprises (a) a metal oxide support; and (b) at least one modified metal component. When trimethylphosphine was used as a probe molecule for characterization based on solid-state nuclear magnetic resonance techniques, the catalyst exhibited a spectral peak in the range of -5 ppm to -20 ppm. The catalyst can be used in non-aromatic hydrocarbon cracking reactions, and has the advantages of high conversion and few side reactions.

This invention relates to a process for chemically treating a carbon-containing feedstock (e.g., a polymer-based feedstock), comprising contacting (e.g., by a hydrocracking reaction) the carbon-containing feedstock and a hydrogen stream in the presence of at least one hydrocracking catalyst to produce an alkane-containing product stream. The hydrocracking catalyst comprises at least one transition metal or transition metal sulfide supported on an oxide-containing support. This invention also relates to an alkane-containing mixture obtained by the process described herein and a system / apparatus for carrying out the process described herein.

The present disclosure provides an improved process for the preparation of monoalkylated cyclopentadiene species in high yield and selectivity. In the process, a solution of dicyclopentadiene magnesium or cyclopentadiene magnesium halide is reacted with an alkylating agent in the presence of a modifier to provide a monoalkylated product. In the methods of the present disclosure, only monoalkylates are produced without observing detectable amounts of dialkylates.

This invention relates to a process for chemically treating a carbon-containing feedstock (e.g., a polymer-based feedstock), comprising contacting (e.g., by a hydrocracking reaction) the carbon-containing feedstock and a hydrogen stream in the presence of at least one hydrocracking catalyst to produce an alkane-containing product stream. The hydrocracking catalyst comprises at least one transition metal or transition metal sulfide supported on an oxide-containing support. This invention also relates to an alkane-containing mixture obtained by the process described herein and a system / apparatus for carrying out the process described herein.

The invention discloses a method for preparing methane by catalyzing polyolefin plastic hydrocracking through ruthenium-based cerium dioxide. The method comprises the following steps: mixing a polyolefin plastic raw material and a ruthenium-based cerium dioxide catalyst, reacting for 1-8 hours under the conditions that the H2 pressure is 2-4 MPa and the reaction temperature is 260-300 DEG C, and depolymerizing the polyolefin plastic to obtain a gas product mainly comprising methane; the ruthenium-based cerium dioxide catalyst is formed by loading Ru on a CeO2 carrier; wherein the loading capacity of Ru is 1-9 wt.%. According to the invention, both excellent recycling performance of the catalyst and mild hydrocracking conditions are considered; the conversion rate of the catalyst to polyolefin plastics can reach 95%-99%, the total yield of gas products can reach 55.9-62.5 mol.%, the yield of methane can reach 41.4-57.7 mol.%, the selectivity of methane is 74.0-99.2%, and the activity of the catalyst is not obviously reduced after the catalyst is used for 6 times.

The invention provides a photo-thermal synergistic catalyst for polyolefin cracking, a preparation method of the photo-thermal synergistic catalyst and a polyolefin cracking method. The preparation method comprises the following steps: dropwise adding a transition metal salt solution into a carbon nanotube, and carrying out first drying and calcining treatment to obtain a calcined product; mixing the calcined product with a guiding agent solution, adjusting the pH value to 9-10, and then adding a silicon source; and carrying out first centrifugal separation, refluxing to remove the guiding agent, and activating the obtained product to obtain the photo-thermal synergistic catalyst for polyolefin cracking. The transition metal active sites are loaded on the carbon nanotube substrate, and the porous silicon dioxide protective layer is coated on the carbon nanotube substrate, so that the catalyst with the advantages of photocatalysis and thermocatalysis can be prepared, and the requirements of anti-carbon deposition and anti-sintering design are met, thereby effectively preventing carbon deposition and sintering, prolonging the service life of the catalyst and reducing the cost. The problems of low catalytic efficiency and high energy consumption of polyolefin pyrolysis are solved.

A solid acid catalyst, and preparation and use thereof are provided. The catalyst contains a metal oxide carrier and at least one modifying metal component. When the catalyst is characterized by solid nuclear magnetic resonance with trimethylphosphine as the probe molecule, it exhibits a spectral peak in the range of −5 to −20 ppm. The catalyst can be used for hydrocracking reaction of non-aromatic hydrocarbons.

A reaction system for carrying out a process for production of chemicals from liquid feedstocks includes a reactor containing one or more liquid reactants, an assembly with two or more electrodes within the reactor configured to generate a high voltage discharge within the one or more liquid reactants, an electrical power supply electrically coupled to the electrodes, inlets and outlets to the reactor for delivering reactants and removing products, and a pressure controller configured to control a pressure of the liquid reactants.

This disclosure relates to processes for converting saturated polyethylene to at least an alkene product. The processes comprise contacting the saturated polyethylene with three or more catalyst components in a reactor, the reactor comprising an alkene reactant. The three or more catalyst components comprise a metathesis catalyst component, an isomerization catalyst component, and a dehydrogenation catalyst component. Contacting causes at least a portion of the saturated polyethylene to undergo dehydrogenation reactions to form unsaturated polyethylene and at least a portion of the unsaturated polyethylene, or products derived therefrom, to undergo metathesis reactions and isomerization reactions to produce an effluent comprising at least the alkene product.

the methane-rich fuel from the separation section to a combustor of the cracking furnace and / or a combustor of a heat recovery steam generator of a combined cycle gas turbine power plant (CCGT); a methane storage section configured to store the methane-rich fuel and a passage for supplying at least a portion of the methane-rich fuel from the separation section to the methane storage section; a gas turbine including a combustor, and a CCGT having a passage for supplying at least a portion of the methane-rich fuel from the methane storage section to a combustor of the gas turbine of the CCGT, the CCGT being configured to generate electrical power and / or high-pressure steam to drive a steam turbine forming part of a steam generation circuit of the ethylene plant; and a power connection configured to supply a portion of the electrical power to operate the ethylene plant, the power connection being a connection to an electrical power system for generating electrical power from a renewable energy source.

The process for producing desulfurized alpha olefins comprises reacting a hydrocarbon stream comprising conjugated diene compounds and alpha olefins in a Diels-Alder reactor at a temperature of 100°C to 250°C to form an effluent stream comprising adducts of conjugated diene compounds and alpha olefins, exposing the effluent stream to a hydrodesulfurization catalyst and a hydrogen stream in a hydrodesulfurization reactor to form the adducts, saturated C 5+ generating a hydrodesulfurization effluent stream comprising a hydrocarbon stream, and a gaseous stream; 5+ The method includes separating the hydrocarbon stream and the gaseous stream, and cracking the adducts in a first pyrolysis reactor operating at a temperature greater than 250°C to produce a cracked adduct stream comprising an alpha olefin stream and a recovered conjugated diene compound stream, wherein the gaseous stream comprises hydrogen, sulfides, C1-C4 saturated hydrocarbons, or a combination thereof.

This disclosure relates to processes for converting unsaturated polyethylene to at least an alkene product. The processes comprise contacting the unsaturated polyethylene with two or more catalyst components in a reactor comprising an alkene reactant. The two or more catalyst components comprise a metathesis catalyst component and an isomerization catalyst component. Contacting causes at least a portion of the unsaturated polyethylene, or products derived therefrom, to undergo metathesis reactions and isomerization reactions to produce an effluent comprising at least the alkene product.

A process for the production of olefins, the process comprising: Directing a hydrocarbon feed to a hydrocarbon cracking plant that cracks at least part of the hydrocarbon feed to generate a cracker discharge; Directing the cracker effluent to a cracker effluent separation system that separates the cracker effluent to produce at least one C4 crack effluent, wherein the C4 crack effluene comprises at least 1-butene, 1,3-butadiene and isobutene; Directing the C4 cracking effluent to a selective hydrogenation and isomerization unit, which brings the C4 cracking effluent into contact with hydrogen in the presence of a selective hydrogenation catalyst at a temperature of 60°C to 80°C and a pressure of 20 bar (2,000 kPa) to 25 bar (2,500 kPa) to generate a hydrogenation effluent, wherein The contact of the C4 cracking effluent with the hydrogen in the presence of the selective hydrogenation catalyst hydrogenates 1,3-butadiene to 1-butene, n-butane or both, and at least some of the 1-butene isomerized to 2-butenes; and the concentration of 2-butenes in the hydrogenation effluent is greater than or equal to the sum of the concentration of 1-butene and the concentration of isobutene in the hydrogenation effluent; Directing the hydrogenation effluent to a metathesis unit, which brings the hydrogenation effluent into contact with a metathesis catalyst and a cracking catalyst downstream of the metathesis catalyst to generate a metathesis reaction effluent comprising at least propene, wherein The contact with the metathesis catalyst causes the metathesis of at least some of the 1-butene, the 2-butenes and the isobutene in the hydrogenation effluent to produce a metathesis reaction product; and Contact with the cracking catalyst causes at least some of the C5+ olefins produced by metathesis to undergo cracking reactions to produce propene, ethene, or both.

Disclosed herein is a method for producing two or more different C2-C6 linear or branched olefins. In one exemplary embodiment, the method can include contacting a first feedstream containing γ-valerolactone with one or more first catalysts in a first reactor to form a mixture. The mixture contains two or more different C2-C6 linear or branched olefins in at least 60% yield, and the one or more first catalysts include a doped zeolite. Also disclosed herein is a method for converting levulinic acid to γ-valerolactone.

The invention relates to a recovery method of X oil. The recovery method comprises the following steps: providing a by-product X oil generated by dehydrogenation preparation of cyclohexanone by taking cyclohexanol as a raw material; carrying out reduced pressure distillation on the X oil to respectively obtain a distillation distillate and a distillation still liquid; the pressure of reduced pressure distillation is-0.095 MPa to-0.1 MPa, the temperature of the tower top is 80-110 DEG C, and the temperature of the tower kettle is 115-190 DEG C; carrying out a dehydration reaction on the distillation still liquid under the action of a metal halide Lewis acid catalyst to obtain a dehydration reaction liquid; carrying out cracking reaction on the dehydration reaction solution under the action of an oxide type solid acid catalyst to obtain a cracking reaction solution; and carrying out solid-liquid separation on the cracking reaction liquid, taking a liquid phase, carrying out first rectification treatment, and collecting cyclohexene at the tower top. The recycling method can effectively improve the resource utilization rate.