824 results about "Naphtha" patented technology

A process for upgrading plastic derived oil includes contacting the plastic derived oil with a mixed catalyst in a first reactor, where the mixed catalyst includes a decontamination catalyst and a cracking catalyst different from the decontamination catalyst. The first reactor reduces concentrations of halogen-containing compounds in the plastic derived oil. The process includes passing the first reactor effluent to a second reactor and contacting the first reactor effluent with the cracking catalyst to produce a second effluent comprising light olefins and naphtha range hydrocarbons. The process includes separating used mixed catalyst from the first reactor to produce a used decontamination catalyst and a second used cracking catalyst, and regenerating the decontamination catalyst and cracking catalyst in separate regenerators to reduce exposure of the cracking catalyst to halogen-containing compounds produced during regeneration of the used decontamination catalyst.

A process for upgrading a plastic derived oil includes providing the plastic derived oil comprising hydrocarbons and greater than or equal to 100 ppmw halogen-containing compounds and contacting the plastic derived oil with an MMO catalyst in a first reactor at reaction conditions to remove halogens from the plastic derived oil to produce a first reactor effluent with less than 100 ppmw halogen-containing compounds. The process includes contacting the first reactor effluent with an adsorbent to produce a treated first reactor effluent, passing the treated first reactor effluent to a second reactor, and contacting the treated first reactor effluent with a cracking catalyst in the second reactor. Contacting with the cracking catalyst may cause hydrocarbons in the treated first reactor effluent to undergo catalytic cracking to produce a second reactor effluent comprising light olefins, naphtha range hydrocarbons, or combinations thereof.

[Problem] To provide a method for efficiently producing a chemical product from a waste material containing waste tires by improving each step in a series of processes to realize long-term operation of the processes. [Solution] This method for producing a chemical product involves a pyrolysis step for obtaining, through pyrolysis of a crushed product of a waste material including waste tires, a first gas component, a pyrolysis oil, and a residual component, a low-temperature hydrogenation step for subjecting a raw material oil containing at least part of the pyrolysis oil to a low-temperature hydrogenation treatment at a temperature of 180°C-350°C to obtain a low-temperature hydrogenated oil, a high-temperature hydrogenation step for subjecting a raw material oil containing at least part of the low-temperature hydrogenated oil to a hydrogenation treatment at a temperature higher than that of the low-temperature hydrogenation treatment to obtain a second gas component and a high-temperature hydrogenated oil, a separation step for separating a naphtha fraction from other fractions through atmospheric distillation of an atmospheric distillation raw material oil containing crude oil and at least part of the high-temperature hydrogenated oil, and a steam cracking step for subjecting a steam cracking raw material oil containing at least part of the naphtha fraction and / or other fractions to a steam cracking treatment to obtain a chemical product, wherein the amount of the pyrolysis oil with respect to the total amount of the first gas component, the pyrolysis oil, and the residual component in the pyrolysis step is 40% by mass or more.

A method and apparatus for the rapid analysis of the molecular components of naphtha. The method comprises: receiving scanning spectrum data of target naphtha (S201); using a calibration spectrogram data set to calibrate the scanning spectrum data, wherein the calibration spectrogram data set is obtained by means of scanning a plurality of naphtha samples under preset detection conditions by using a plurality of spectrometers, and the scanning spectrum data is obtained by means of scanning the target naphtha on the basis of a first scanner among the plurality of spectrometers (S202); and performing, from a preset naphtha molecular composition library, matching to obtain a molecular composition corresponding to the calibrated scanning spectrum data, and obtaining predicted molecular properties of the target naphtha on the basis of the molecular composition, so as to determine macroscopic properties of the target naphtha, wherein the naphtha molecular composition library is obtained by using comprehensive two-dimensional gas chromatography technology (S203). The analysis of fraction molecular components of naphtha fractions and the characterization of macroscopic physical properties of petroleum fractions can be accurately and efficiently implemented.

The invention relates to a method and a system for producing low-carbon olefin and light aromatic hydrocarbon through catalytic cracking. The method comprises the following steps: (1) carrying out contact reaction on raw oil and a catalytic cracking catalyst in a constant linear velocity fluidized bed reactor to obtain an oil agent mixture; (2) separating the oil agent mixture to obtain reaction oil gas and a spent catalyst; and (3) separating the reaction oil gas to obtain a low-carbon olefin component, a gasoline component and an oil slurry component. In a constant-linear-speed fluidized bed reactor, light petroleum hydrocarbons such as diesel oil are contacted with a catalytic cracking catalyst with a high silica-alumina ratio, and self-heat balance is maintained through regeneration flue gas circulation to produce low-carbon olefins, light aromatic hydrocarbons and the like. According to the method disclosed by the invention, heavy oil such as naphtha, wax oil and residual oil can be processed while light hydrocarbon such as diesel oil is processed, the conversion rate of the diesel oil is high, self-heating balance can be realized, the problem of excessive diesel oil production capacity of a refinery plant is solved, and the processing benefit of crude oil is also improved.

The invention relates to a method for producing high-octane gasoline through hydrocarbon catalytic cracking and a reaction system thereof, and the method comprises the following steps: in a constant linear velocity fluidized bed reactor, diesel oil and other light petroleum hydrocarbons are contacted with a high silica-alumina ratio catalytic cracking catalyst, and self-heat balance is maintained through regeneration flue gas circulation to produce liquefied gas and high-octane gasoline. According to the method disclosed by the invention, heavy oil such as naphtha, wax oil and residual oil can be processed while light hydrocarbon such as diesel oil is processed, the conversion rate of the diesel oil is high, self-heating balance can be realized, the problem of excessive diesel oil production capacity of a refinery plant is solved, and the processing benefit of crude oil is also improved.

The invention discloses a method for producing biological aviation kerosene from high-acid-value oil, which comprises the following steps: mixing the high-acid-value oil without mechanical impurities with a deacidification pretreatment catalyst to obtain a mixture, and adding the mixture into a slurry bed reactor for deacidification pretreatment to obtain effluent; s2, performing solid-liquid separation on the effluent obtained in the step S1 to obtain a liquid-phase product, and performing hydrotreatment on the liquid-phase product sequentially through a fixed bed hydrodeoxygenation reactor, a fixed bed hydrocracking reactor and a fixed bed hydroisomerization reactor which are connected in series to obtain a hydrogenated product; and carrying out gas-liquid separation on the hydrogenation product to obtain a liquid product, and fractionating the liquid product to obtain a naphtha fraction, a biological aviation kerosene fraction and a biodiesel fraction. According to the method, the high-acid-value oil can be converted into the biological aviation kerosene in a high-yield manner.

The invention discloses a method for obtaining a regenerated oil product by comprehensively utilizing high-chlorine high-metal waste mineral oil and tire pyrolytic oil, and belongs to the technical field of post-treatment of waste mineral oil and tire pyrolytic oil. The method comprises the following steps: (1) mixing high-chlorine high-metal waste mineral oil with circulating oil, and feeding the mixture into a reactor A; (2) mixing the effluent of the reactor A with tire pyrolytic oil, and feeding the mixture into a reactor B; (3) separating effluent of the reactor B to obtain naphtha, an oil component A and residues; (4) the oil component A enters a reactor C for hydrogenation upgrading; and (5) separating the effluent of the reactor C to obtain a second oil phase, and enabling the second oil phase to enter a steam stripping stabilizing tower and a normal-pressure rectifying tower to obtain naphtha, light fuel oil, medium fuel oil and heavy fuel oil. The method can solve the problem that chlorine and metal elements are difficult to efficiently remove at the same time in the recycling of high-chlorine high-metal waste mineral oil and tire pyrolytic oil at present, and improves the quality and yield of regenerated oil products.

The invention relates to the technical field of gasoline processing, in particular to a method and a device for producing diesel oil with a low freezing point by taking heavy aromatics and mixed diesel oil as raw materials, the method comprises the following steps of: 1, mixing the heavy aromatics, the mixed diesel oil and hydrogen, feeding into a hydrofining unit, and carrying out hydrofining reaction under the action of a hydrofining catalyst, a hydrofining reaction product is obtained; step 2, the hydrofining reaction product enters a hydro-upgrading unit and is subjected to hydro-upgrading reaction under the action of a hydro-upgrading catalyst, and a hydro-upgrading reaction product is obtained; and 3, feeding the hydro-upgrading reaction product into a rectification unit, and carrying out rectification separation to obtain naphtha and-35 # diesel oil with a low freezing point. The heavy aromatics, the hydrogen and the mixed diesel oil are mixed, the obtained mixed material is subjected to hydrofining and hydro-upgrading treatment, the-35 # low-freezing-point diesel oil is obtained, the method has the advantages of being short in technological process and small in equipment investment, the field process does not need to be greatly transformed, and the quality improvement and efficiency improvement effects are remarkable.

Provided is a process for converting waste plastic into recycle for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and / or polypropylene. These waste plastics are then passed through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a pyrolysis oil comprising a naphtha / diesel and heavy fraction, and char. The pyrolysis oil is then passed to a hydroconversion reactor comprising an LTA zeolite based catalyst having an acid site concentration of about 2.7 mol / l. Effluent from the hydroconversion reactor is then sent to a steam cracker.

The invention provides a p-xylene preparation method, which comprises: (1) feeding a naphtha raw material to a first reaction zone, and carrying out a first catalytic reaction in the presence of a first catalyst to obtain a first material flow containing benzene, toluene, p-xylene and by-products; (2) feeding benzene, toluene and methanol to a second reaction zone, and carrying out a second catalytic reaction in the presence of a second catalyst to obtain a second material flow containing benzene, toluene, p-xylene and by-products; (3) sending the first material flow and / or the second material flow to a separation system for separation to obtain a benzene-rich component, a toluene-rich component, and a p-xylene-rich component and a byproduct-rich component which are used as products; and (4) returning the separated benzene-rich component and toluene-rich component to the step (2) as the sources of benzene and toluene. The invention further provides a corresponding preparation system. According to the preparation method and the preparation system, the naphtha raw material and the methanol are used for preparing the p-xylene, the product distribution is adjusted, and the selectivity of the p-xylene is remarkably improved.

The present disclosure relates to a process for removal of carbonyl impurities from a mixed hydrocarbon stream obtained from naphtha and gas stream cracking processes. The process of the present disclosure is simple, economical and environment friendly. The process of the present disclosure is efficient in removing higher amounts of carbonyl impurities. The process of the present disclosure can be easily scaled up for commercial purposes.

[Problem] To provide a method capable of producing a monocyclic aromatic hydrocarbon such as benzene or xylene effective as a base raw material, with a naphtha raw material containing renewable naphtha. [Solution] A method for producing at least one monocyclic aromatic hydrocarbon of benzene or xylene with a naphtha raw material containing renewable naphtha, the method including step (A-1) of pyrolyzing the naphtha raw material in the presence of water vapor, to produce and separate toluene, and step (A-2) of subjecting toluene to disproportionation reaction or transalkylation reaction, to produce and separate at least one monocyclic aromatic hydrocarbon of benzene or xylene.

The present invention discloses a method for secondary suspended bed hydrogenation treatment of crude oil. Crude oil, hydrogen and catalyst are mixed and then enter into a crude oil suspended bed hydrogenation and upgrading reaction unit for hydrogenation and upgrading; the reaction product of the crude oil suspended bed hydrogenation and upgrading is separated into a first gas product and a first liquid product through gas-liquid separation; the first liquid product and the subsequent second liquid product are mixed and then enter into a fractionation device to obtain naphtha, diesel, wax oil and residual oil; part of the residual oil is discharged from the device, and the remaining residual oil is mixed with circulating hydrogen and then enters into a residual oil suspended bed hydrocracking reaction unit for hydrogenation reaction; the reaction product of the residual oil suspended bed hydrocracking is separated into a second gas product and a second liquid product through gas-liquid separation. The crude oil suspended bed hydrogenation and upgrading process adopted by the method can significantly improve the quality of crude oil and increase the yield of light oil; coupled with the residual oil suspended bed hydrocracking process, the deep conversion and utilization of residual oil can be realized. The overall process has the advantages of short process, low operating cost and strong raw material adaptability.

The invention provides a continuous reforming catalyst as well as a preparation method and application thereof. The preparation method of the continuous reforming catalyst comprises the following steps: preparing a Sn-containing alumina carrier forming matter; roasting the molded product in an oxygen-free atmosphere to obtain an alumina carrier; impregnating the alumina carrier with an impregnation liquid, the impregnation liquid comprising a Pt-containing compound, a K-containing compound and a competitive adsorbent to obtain an impregnated alumina carrier; and drying, activating and reducing the impregnated alumina carrier to obtain the continuous reforming catalyst. The continuous reforming catalyst provided by the invention is prepared by the preparation method. The invention also provides application of the continuous reforming catalyst in production of high-octane gasoline blending components or aromatic hydrocarbons by continuous reforming of naphtha. Platinum atoms in the continuous reforming catalyst have strong interaction with the carrier, and the high-severity reaction process requirement of catalytic reforming can be met.

The invention discloses a wax oil hydrotreating method. Reaction products are timely removed and separated, and catalyst grading setting is performed according to different components, so that raw oil can be subjected to echelon targeted hydrogenation reaction in the reactor, and the problem that the blending ratio is limited due to the fact that the hydrogenation depth cannot be better controlled during blending of catalytic diesel oil and wax oil raw materials is solved; the aromatic hydrocarbon content in heavy naphtha in a hydrocracking product is greatly increased, and the product quality of diesel oil and tail oil is improved.

A gasoline fuel composition for a spark ignition internal combustion engine comprising (a) renewable naphtha at a level from 40 to 60% v / v, (b) oxygenated hydrocarbon at a level from 15% v / v to 25% v / v, and (c) aromatic hydrocarbon at a level from 25% v / v to 45% v / v, 5 wherein the gasoline fuel composition has a RON of 87 or greater. While the low octane number of renewable naphtha would normally severely restrict its blendability in gasoline to low levels, the fuel composition of the 10 present invention allows the use of renewable naphtha in significant levels while maintaining a good octane rating for the overall composition.

The invention relates to the production of hydrocarbon products from polymer feedstocks. In particular, the present invention relates to a production process for obtaining naphtha and diesel from a polymer feedstock by pyrolysis and hydrogenation of a fluid product stream resulting from the pyrolysis.

A method and apparatus for refining waste plastic pyrolysis oil has an effect of converting the waste plastic pyrolysis oil into high value-added hydrocarbon oil having a high content of naphtha and kerosene, lowering a content of impurities such as chlorine, nitrogen, oxygen, and metal of the hydrocarbon oil, operating under milder process conditions, having excellent process efficiency, and having high process stability to be able to continuously produce refined oil.

The invention relates to the technical field of fraction optimization, and discloses a catalytic isomerization-based fraction optimization regulation and control device and method.The catalytic isomerization-based fraction optimization regulation and control device comprises a rectifying tower, the outer wall of the rectifying tower is in through connection with an air inlet, the outer wall of the rectifying tower is in through connection with a liquid inlet, the outer wall of the rectifying tower is in through connection with a reflux inlet, and the top of the rectifying tower is in through connection with an air outlet; when a gas phase passes through the gas outlet, the gas phase jacks the floating valve shell to move upwards, makes contact with the inner wall of the top of the floating valve shell, is blocked by the limiting plate and flows out of the gas outlet groove, and a plurality of gas holes are formed in a catalyst, so that the contact time of the gas phase and the catalyst is prolonged; the problems that when a conventional float valve rectifying tower is used, the contact time of a gas phase in a catalyst layer is short, the deep isomerization reaction time of light naphtha is usually long, only low-carbon hydrocarbon isomerization or simple etherification reaction can be treated, and deeper catalytic isomerization cannot be carried out are effectively solved.

A process for upgrading plastic derived oil includes contacting the plastic derived oil with a mixed catalyst in a first reactor, where the mixed catalyst includes a decontamination catalyst and a cracking catalyst different from the decontamination catalyst. The first reactor reduces concentrations of halogen-containing compounds in the plastic derived oil. The process includes passing the first reactor effluent to a second reactor and contacting the first reactor effluent with the cracking catalyst to produce a second effluent comprising light olefins and naphtha range hydrocarbons. The process includes separating used mixed catalyst from the first reactor to produce a used decontamination catalyst and a second used cracking catalyst, and regenerating the decontamination catalyst and cracking catalyst in separate regenerators to reduce exposure of the cracking catalyst to halogen-containing compounds produced during regeneration of the used decontamination catalyst.

The invention relates to the technical field of preparation of modified asphalt, in particular to SBS modified asphalt and a preparation method thereof. The SBS modified asphalt provided by the invention is prepared from the following raw materials: matrix asphalt, a linear SBS modifier 791H, a star SBS modifier 4306 and an auxiliary agent, the auxiliary agent is selected from one or two of aromatic oil, naphtha, a stabilizer and furfural extract oil. The modified asphalt prepared by the invention has high storage stability and ageing resistance, the high-temperature performance and water stability are remarkably improved, and the overall performance is better than that of linear SBS modified asphalt. According to the high-stability SBS modified asphalt disclosed by the invention, the storage stability problem is solved, various properties and pavement performance of the SBS modified asphalt are integrally improved, and the high-stability SBS modified asphalt is simple and convenient to prepare, short in processing flow, simple in equipment, mild in process condition, rapid in production and low in modification cost.

The invention provides a method for pretreating a Fischer-Tropsch synthesis catalyst and a method for converting Fischer-Tropsch synthesis gas by using the pretreated catalyst obtained by the method for pretreating the Fischer-Tropsch synthesis catalyst. The method for pretreating the Fischer-Tropsch synthesis catalyst comprises the following steps: 1) reducing a main catalyst which is an iron-based catalyst; 2) carbonizing the main catalyst; (3) passivating the main catalyst; and 4) impregnating a mixture of an auxiliary agent and the main catalyst obtained in the step 3) with liquid wax, naphtha or heavy diesel oil. In the method for pretreating the Fischer-Tropsch synthesis catalyst, a passivation process is introduced after reduction and carbonization, the activity of the catalyst is stably and slowly released, and rapid deactivation is avoided; after the main catalyst is reduced, carbonized and passivated, the auxiliary agent is added and mixed, so that the auxiliary agent does not participate in the reduction and carbonization process of the iron oxide and does not influence the reduction and carbonization effect; the liquid wax or naphtha or heavy diesel oil is mixed with the mixture slurry of the main catalyst and the auxiliary agent, so that transportation and pipeline transportation are facilitated.

A method for scheduling a naphtha cracking center by at least one processor, includes the steps of: obtaining input information; determining, by the at least one processor, incoming tank information using a first agent based on the input information, wherein the first agent is a first artificial intelligence device configured to be learned by reinforcement learning; determining, by the at least one processor, mixing tank combination information using a second agent, wherein the second agent is a second artificial intelligence device configured to be learned by reinforcement learning; and determining, by the at least one processor, cracking furnace operation information using a third agent, wherein the third agent is a third artificial intelligence device configured to be learned by reinforcement learning.

Naphtha reforming catalysts are described. The catalyst includes a support comprising a solid solution or a homogenous mixture of atoms in solid state having a single crystal structure comprising AI2O3, and / or 0.01 to 3 wt% of a first metal of Group 2 or Group 15 of the Periodic Table, or a combination thereof. It also includes 0.05 to 5.0 wt% Pt and 0.05 to 5.0 wt% Re; 0.01 to 2 wt% of at least one additional metal from Groups 1, 2, 3, 9, or 15 of the Periodic Table, or combinations thereof; 0.03 to 1.0 wt% S; and 0.5 to 2 wt% of a halogen. The catalyst has an average bulk density in a range of 0.25 - 1.50 g / cc and a surface area in a range of 50-300 m2 / g. Catalytic reforming processes are also described.

The invention provides an encapsulated composite catalyst, the composition of the encapsulated composite catalyst is as follows: an oxide oxygen carrier (at) molecular sieve, the oxide oxygen carrier is selected from any one of CaMnO3, CaMn0. 8Cu0. 2O3, MgMn2O3, NiMn2O3, Fe2O3, Mn2O3 and Co3O4, and the molecular sieve is selected from any one of a ZSM-5 molecular sieve, a Silicate-1 molecular sieve and a Beta molecular sieve. The catalyst overcomes the problems of easy aggregation of metal ions, blockage of a pore structure, weak interaction force between metal and the molecular sieve and the like in the traditional metal molecular sieve preparation process; and the defect that the metal oxide oxygen carrier is easy to sinter and agglomerate under a high-temperature reaction condition is effectively inhibited. The invention also provides application of the encapsulated composite catalyst in preparation of low-carbon olefin by oxidative cracking of naphtha, transformation of cracking reaction from high self-heat absorption to self-heat supply is realized, process consumption is greatly reduced, the conversion rate is high, and the mass selectivity of low-carbon olefin is ensured.

A process for converting naphtha is disclosed. The process comprises contacting a naphtha stream and a hydrogen stream with a catalyst in a reactor to produce a paraffinic stream. The ethane present in the paraffinic stream is converted into ethylene in a steam cracking unit. An ethylene stream is separated from a C3+ hydrocarbon stream and the C3+ hydrocarbon stream is recycled to the reactor.

The utility model belongs to the technical field of petrochemical engineering, and particularly provides a system for controlling the blending hydrogenation crude gasoline proportion of a reforming device, which comprises a normal pressure naphtha control pipeline, a hydrogenation crude gasoline control pipeline, a raw material buffer tank, a gasoline mixing unit, a liquid level controller I and a liquid level controller II, the problems that a traditional blending mode is not timely in adjustment, poor in precision, poor in reforming reaction effect, unstable in product quality and increased in equipment operation risk are solved, the liquid level in the raw material buffer tank is accurately, stably and effectively adjusted and controlled, and a solid guarantee is provided for efficient and stable operation of the device and improvement of the product quality.

A process for improving yield of kerosene from a renewable feedstock involves directing a to a lead stripper to separate a lead stripper bottoms stream comprising naphtha and higher boiling point range hydrocarbons and a lead stripper overhead stream. The lead stripper bottoms stream is passed to a naphtha recovery column to separate a vapor stream comprising naphtha and water in an overhead stream from a heavy hydrocarbon product stream. The vapor stream is condensed and water is removed to produce a product naphtha stream. Kerosene and diesel boiling point range product streams are separated from the heavy hydrocarbon product stream in a vacuum fractionator.

The invention discloses a high-yield and low-carbon-deposition regulation and control method and system for a continuous regenerative catalytic reforming reaction. The method comprises the following steps: at the beginning, setting a weighted average inlet temperature for the four-in-one reforming reactor and setting an inlet temperature of each bed layer; measuring the content of naphthenic hydrocarbon in naphtha to be added at the beginning, and setting the initial average pressure of the four-in-one reforming reactor according to the content of naphthenic hydrocarbon in naphtha to be added; naphtha is added into the four-in-one reforming reactor for a reaction; in the reaction process, the weighted average inlet temperature of the four-in-one reforming reactor, the inlet temperature of each bed layer, the catalyst circulation rate and the average pressure are regulated and controlled in real time; and ending the experiment. The method breaks through the critical path of the current technical bottleneck, and has important significance for improving the product selectivity of the continuous regeneration catalytic reforming process, reducing the energy consumption and prolonging the service life of the catalyst.