23 results about "Pyrolysis gasoline" patented technology

The invention discloses an ethylene pyrolysis gasoline and wash oil mixed hydrogenation production system, and relates to the technical field of quality improvement and efficiency improvement of an ethylene process, which is characterized in that wash oil and ethylene pyrolysis gasoline respectively pass through respective pretreatment systems, are pretreated and then are fed into respective first reactors; and the wash oil and ethylene pyrolysis gasoline passing through the first reactor enter a second reactor together for hydrogenation reaction, and then a product in the second reactor is separated. The invention solves the industry development problem of low economic benefit and market competitiveness caused by low resource utilization efficiency of traditional by-products (such as compressor wash oil and pyrolysis gasoline) in the existing ethylene industry and increase of production cost of the device.

The application provides a method and device for preparing low-carbon olefins and aromatic hydrocarbons from aromatic hydrocarbon-containing light crude oil, which comprises the following steps: pretreating the aromatic hydrocarbon-containing light crude oil to obtain pretreated crude oil, subjecting the pretreated crude oil to raw material fractionation treatment to obtain a cracking unit feed stream, subjecting the cracking unit feed stream to cracking treatment to obtain a cracking product stream and a first residual oil stream; discharging the first residual oil stream, subjecting the cracking product stream to product separation treatment to obtain a separation product stream and a cracking gasoline stream; subjecting the cracking gasoline stream to gasoline hydrogenation treatment to obtain a hydrogenated cracking gasoline stream, subjecting the hydrogenated cracking gasoline stream to aromatic hydrocarbon extraction treatment to obtain a fourth aromatic hydrocarbon-rich stream, and subjecting the fourth aromatic hydrocarbon-rich stream to aromatic hydrocarbon separation treatment to obtain an aromatic hydrocarbon separation product stream. Compared with a traditional refining and chemical integration process, the technical scheme of the application greatly shortens the processing flow and can maximize the yield of low-carbon olefins and aromatic hydrocarbons from the aromatic hydrocarbon-containing light crude oil.

A method for selective hydrogenation of pyrolysis gasoline, comprising contacting pyrolysis gasoline with a hydrogenation catalyst in the presence of hydrogen, the hydrogenation catalyst comprising a composite oxide, the composite oxide comprising alumina and titania, the specific surface area of the composite oxide being represented by X m 2 / g, the average pore diameter of the composite oxide being represented by Y nm, wherein the ratio of X to Y is 5 to 30; in the composite oxide, the titania in an anatase crystal phase accounts for 95wt% to 100wt% of the total titania. The method can selectively hydrogenate dienes in the C6-C8 fraction and the C9-C10 fraction of pyrolysis gasoline, and has the advantages of good low-temperature activity, good adaptability to raw materials, and high stability.

The application discloses a phosphorus-rich transition metal phosphide catalyst and a synthesis method and application thereof. The chemical formula of the phosphorus-rich transition metal phosphide is MP2 and / or MP3, and the transition metal M is selected from at least one of group VIII and / or group IB elements. The catalyst has high phosphorus content, is used in a pyrolysis gasoline hydrogenation denitrification reaction, has high activity, low aromatic ring hydrogenation saturation, low preparation cost, and a relatively simple and controllable process.

The application discloses a pyrolysis gasoline selective hydrogenation catalyst, a preparation method and application thereof, and belongs to the field of catalysts. The catalyst comprises a carrier, an active component and an additive. The carrier is alumina, the alumina has a leaf-shaped aggregate structure, the active component comprises palladium, and the additive comprises a Group VI B metal and an alkaline earth metal. The content of the palladium is 0.1-0.5 wt% in terms of metal, the content of the Group VI B element is 0.1-3 wt% in terms of metal, and the content of the alkaline earth metal is 0.2-5 wt% in terms of metal. The catalyst can greatly improve hydrogenation activity and carbon deposition resistance.

The application provides a pyrolysis gasoline fraction selective hydrogenation catalyst, which comprises alumina with a bimodal pore distribution structure and an active component; the active component comprises Pd, Pt, Ce, W, Ni and Cu, the content of Pd is 0.2wt%-0.5wt% based on 100% of the mass of the catalyst, the content of Pt is 0.02wt%-0.15wt%, the content of Ce is 0.5wt%-4.0wt%, the content of W is 0.2wt%-2.5wt%, the content of Ni is 0.5wt%-5.0wt%, and the content of Cu is 0.5wt%-3.0wt%; Ni-Cu is loaded by a microemulsion method, Pd, Pt, Ce and W are loaded by a solution method, and Pt and Ce are loaded simultaneously. After the catalyst is regenerated for 5 times, the activity and selectivity of the catalyst do not change obviously, and the catalyst still has excellent hydrogenation activity and anti-coking performance.

The invention relates to a system and a method for producing various products by hydrogenation of pyrolysis gasoline, and the system enables a pyrolysis gasoline raw material to be subjected to hydrogenation separation treatment by flexibly adjusting the working state of a three-way switching group, and can produce a product combination comprising non-hydrogenated C5, non-hydrogenated C9 < + > and fully-hydrogenated gasoline. The system can be used for producing all-hydrogenated C5, semi-hydrogenated C9 < + > and all-hydrogenated gasoline, product combinations of all-hydrogenated C5, semi-hydrogenated C9 < + > and all-hydrogenated gasoline, all-semi-hydrogenated C5, semi-hydrogenated C9 < + > and all-hydrogenated gasoline, and connection modes among units in the system can be flexibly switched according to market supply and demand changes, so that the flexibility of a device product scheme can be improved.

A process for producing aromatic compounds from pyrolysis oil, comprising: refining the pyrolysis oil to pyrolysis gasoline in a multi-stage reactor comprising a slurry phase reactor and a fixed-bed reactor, wherein the slurry phase reactor comprises a mixed metal oxide catalyst and the fixed-bed reactor comprises a mesoporous zeolite-supported metal catalyst; aromatizing the pyrolysis gasoline in an aromatization unit; hydrodealkylation and transalkylation of a product from the aromatization unit in a hydrodealkylation-transalkylation unit, thereby generating an aromatic stream; and processing the aromatic stream in an aromatic recovery complex to produce the aromatic compounds comprising benzene, toluene, and xylenes (BTX).

The application discloses a composite oxide, a hydrofining catalyst and application thereof. The composite oxide comprises alumina and titanium dioxide, the specific surface area of the composite oxide is represented as X m 2 / g, the average pore size of the composite oxide is represented as Y nm, wherein the ratio of X to Y is 32 to 50; and the pore volume of the composite oxide is represented as Z mL / g, the ratio of X to Z is 750 to 950. The hydrofining catalyst provided by the application comprises the composite oxide and an active component, and the active component is selected from one or more of molybdenum, nickel and cobalt. The catalyst has specific structure, TiO2 is uniformly dispersed on the surface of the carrier, the catalyst has good low-temperature activity, and the catalyst has high hydrogenation activity under high space velocity.

The application discloses an ethylene cracking process system, which comprises a cracking unit, a quenching-compression unit and a separation unit, wherein the quenching-compression unit is provided with at least two quenching-compression process sub-lines, at least one device is arranged between the quenching-compression process sub-lines in a cross-line mode, and the device is selected from a pyrolysis diesel stripping tower, a pyrolysis fuel oil stripping tower, a quenching oil viscosity-reducing tower, a process water stripping tower, a pyrolysis gasoline stripping tower and a condensate stripping tower; in addition, the separation unit can be further provided with a debutanizer in a cross-line mode. Through the optimized combination of the devices of various process units, the device setting mode is flexible and various, the product quality is ensured on the basis of reducing the devices, the device operation efficiency is improved, the device maintenance difficulty and the comprehensive energy consumption of the system are reduced.

This invention provides a selective hydrogenation method for cracked gasoline fractions, in which the cracked gasoline fractions and hydrogen are hydrogenated in a fixed-bed reactor at a temperature of 30–100°C, a pressure of 2.0–5.0 MPa, and a feed volume hourly space velocity of 0.8–3.5 h⁻¹. ‑1 The hydrogen-to-oil volume ratio is 80–300:1; the catalyst support is alumina with a bimodal porous structure; the active components include Pd, Pt, Ce, W, Ni, and Cu, with Pd content of 0.2–0.5%, Pt content of 0.02–0.15%, Ce content of 0.5–4.0%, W content of 0.2–2.5%, Ni content of 0.5–5.0%, and Cu content of 0.5–3.0% by catalyst mass. Ni-Cu is supported by a microemulsion method, while Pd, Pt, Ce, and W are supported by a solution method, with Pt and Ce being supported simultaneously. This hydrogenation method exhibits excellent hydrogenation activity, anti-coking properties, and regeneration performance.

The application discloses a pyrolysis gasoline primary catalyst and a preparation method thereof. The catalyst comprises an alumina and calcium phosphate composite carrier and a hydrogenation active component nickel, and the content of the nickel in the form of oxide is 10.0-25.0% based on the weight of the catalyst, the content of the calcium phosphate is 2.5-18.0%, and the content of the alumina is 57.0-87.5%; the total acid amount of the catalyst infrared acid is 0.45-0.75 mmol / g. The preparation method is as follows: (1) calcium oxide is added into the bottom water of a reactor, then an aluminum salt aqueous solution and a precipitating agent are added to carry out a gelation reaction, then phosphoric acid is added to carry out aging, and a filter cake is obtained; (2) the filter cake is pulped, then an active metal impregnation solution is added, and then an organic acid is added, so as to obtain active metal modified alumina dry gel powder; and (3) the active metal modified alumina dry gel powder of step (2), a peptizing agent and a extrusion aid are uniformly mixed, are extruded into a strip, and after drying and calcination, a catalyst product is obtained. The catalyst is applied to a pyrolysis gasoline primary selective hydrogenation process, and has high hydrogenation activity and selectivity.

The invention discloses a method and a system suitable for producing saturated C5 by a pyrolysis gasoline hydrogenation device, and belongs to the technical field of petrochemical industry. Comprising the following steps: S1, carrying out first-stage hydrogenation reaction to remove diolefin in crude pyrolysis gasoline; s2, C9 separation: cutting out a C9 < + > component through a C9 < + > removal tower, and obtaining C5-C8 fractions at the tower top; s3, carrying out second-stage hydrogenation reaction, deeply saturating monoolefine and removing sulfide; and S4, refining and separating the product, desulfurizing, feeding into a depentanizer, extracting high-purity saturated C5 from the top of the depentanizer, and producing C6-C8 hydrogenated gasoline from the bottom of the depentanizer. The pentane removal tower is arranged at the tail end of the whole process, accurate cutting of C5 after complete hydrogenation purification is ensured, the product purity and stability are effectively improved, low-value unsaturated C5 can be converted into a high-added-value ethylene cracking raw material without changing the main body structure of an existing device, the delivery balance problem of C5 is solved, and the production cost is reduced. The self-sufficient capacity and the economic benefit of the light raw material are obviously enhanced.

The application discloses a catalytic cracking gasoline hydrofining method, which comprises the following steps: loading a pre-sulfided hydrofining catalyst into a fixed bed reactor, sulfidizing the hydrofining catalyst, mixing and preheating catalytic cracking gasoline and hydrogen, and then feeding the mixture into the fixed bed reactor to react, wherein the reaction conditions are as follows: the reaction temperature is 240-360 DEG C, the reaction pressure is 1.5-4.0 MPa, the space velocity is 0.5-4 h-1, and the hydrogen / oil volume ratio is 100-600:1. ‑1 The preparation method of the hydrofining catalyst is as follows: performing atomization and spraying treatment on a carrier by using a pre-spraying solution, aging after the spraying is completed to obtain a pretreated carrier, wherein the pre-spraying solution is a citric acid aqueous solution or a potassium hydroxide solution; impregnating the pretreated carrier with an impregnation solution containing an active component, and then aging, drying and calcining to obtain the hydrofining catalyst.

The invention relates to the technical field of petroleum resin modification, and discloses a preparation method of petroleum resin soluble with nitrocotton, the petroleum resin comprises the following raw materials by mass: C9 pyrolysis gasoline, a mixed solution of alpha-pinene and beta-pinene, terpene, a phenolic hydroxyl compound, an n-butyllithium initiator, a dilute ethanol terminator and an n-hexane solvent; alpha-pinene, beta-pinene, terpene and phenolic hydroxyl groups are adopted as modifiers, pinene bonds have the performance of hydroxyl groups and contain a special double-ring double-bond structure, and after the pinene bonds are mixed with a C9 pyrolysis gasoline raw material in an anionic polymerization mode, the synthesis process is consistent with a conventional petroleum resin synthesis method, and the petroleum resin soluble in nitrocotton is obtained. The content of active groups in the finally obtained modified resin is enough to meet the requirement of dissolving with nitrocotton, the cost of nitrolacquer is reduced, and the performance of the nitrolacquer is not reduced.

The present disclosure relates to a method for increasing production of light aromatics by catalytic cracking gasoline re-conversion, which can efficiently convert heavy aromatics in heavy oil cracking products into light aromatics by processing heavy oil raw materials through catalytic cracking reaction, on the one hand, can avoid the problems of high hydrogen consumption, harsh operating conditions and loss of aromatics caused by using hydrogenation treatment to produce light aromatics; on the other hand, can solve the problem of difficult utilization of low-value heavy aromatics, realize efficient utilization of resources. And, the gasoline heavy fraction is recycled in the second reactor, wherein the second reactor is a dense phase fluidized bed reactor, which can make the gasoline heavy fraction fully react, thereby further improving the yield of light aromatics. In addition, the method of the present disclosure can also produce low-carbon olefins as by-products, further improving the utilization rate of raw materials.

The invention discloses a pyrolysis gasoline first-stage catalyst and a preparation method thereof. The catalyst comprises an aluminum oxide and niobium oxyphosphate composite carrier and hydrogenation active component nickel, the total acid amount of infrared acid of the catalyst is 0.45-0.75 mmol / g, and the acid amount of L acid is 0.40-0.70 mmol / g. The preparation method comprises the following steps: (1) adding niobic acid and phosphoric acid into bottom water of a reactor, adding an aluminum salt aqueous solution and a precipitant in a parallel flow manner, carrying out a gel forming reaction, adding a solution containing basic nickel carbonate and citric acid into slurry after the reaction is finished, then adding organic acid, carrying out an aging reaction, and washing, filtering and drying an aging product to obtain modified aluminum oxide dry glue powder; and (2) mixing the modified alumina dry glue powder, a peptizing agent and an extrusion aid, performing extrusion molding, drying and roasting to obtain the catalyst. According to the catalyst disclosed by the invention, relatively high diene hydrogenation selectivity of a pyrolysis gasoline first-stage catalyst is realized through a synergistic effect of NbOx species, acidity and nickel.

The invention relates to the technical field of hydrogenation catalysts, and discloses a preparation method of a catalytic cracking gasoline hydrogenation catalyst, the prepared catalytic cracking gasoline hydrogenation catalyst and application. The preparation method of the catalytic cracking gasoline hydrogenation catalyst comprises the following steps: (1) mixing fluorine-modified aluminum oxide, silicon-modified aluminum oxide and an amorphous silicon-aluminum material, and then carrying out first roasting to obtain a composite carrier; (2) active metal and a first organic matter are loaded on the composite carrier through an impregnation method, then secondary roasting is carried out, a catalyst precursor is obtained, and the active metal is selected from at least one of VIII group metal and VIB group metal; and (3) carrying out organic matter post-treatment on the catalyst precursor by adopting a second organic matter, and then carrying out third roasting. The method adopts the composite carrier to cooperate with post-treatment of the organic matter, enhances the hydrocarbon cyclization function of the catalyst, and improves the selectivity of the catalyst.

The application discloses a supported transition metal phosphide catalyst and a preparation method and application thereof. The supported transition metal phosphide catalyst comprises the following components: (1) a carrier; and (2) an active component, which is a transition metal phosphide; wherein the nanoparticle particle size of the transition metal phosphide is 5-30 nm. The catalyst provided by the application has the characteristics of high activity and long service life when used in a pyrolysis gasoline hydrodesulfurization reaction.

A method for processing pyrolytic gasoline containing dienes and sulfur compounds includes: a) selectively hydrogenating the dienes of the feedstock in the presence of hydrogen and a catalyst to produce a diene-removed effluent; b) selectively increasing the molecular weight of light sulfur compounds in the presence of hydrogen and a catalyst, wherein step b) is performed directly after step a) or step c), between two steps c), or during step e); c) separating the effluent from step a) or step b) to obtain a gas stream and a liquid stream, wherein step c) is performed before and / or after step b); d) recycling a portion of the liquid stream from step c) to step a); and e) fractionation downstream of steps a) and c) allowing the separation of light gasoline fractions with a sulfur content of less than 10 ppm by weight.

The invention relates to a pyrolysis gasoline processing method and a processing reaction system, and the method comprises the following steps: in a first hydrogenation reactor, pyrolysis gasoline contacts with a hydrogenation protective agent at a reaction temperature of 140-250 DEG C to carry out a selective hydrogenation reaction, enters a second hydrogenation reactor after the reaction, and contacts with a hydrofining catalyst at a reaction temperature of 220-360 DEG C to carry out a hydrofining reaction; the liquid phase in the reactants enters a stripping tower to remove hydrogen sulfide and light components and then enters a rectifying tower for fractionation, C6-C8 fractions are obtained at the top of the tower, and C9 < + > fractions are obtained at the bottom of the tower; wherein the reaction effluent of the second hydrogenation reactor is firstly used as a heat source of a reboiler at the bottom of the stripping tower, and then is sequentially subjected to heat exchange with feed material flows of the second hydrogenation reactor and the first hydrogenation reactor; and the tower top gas phase of the rectifying tower exchanges heat with the feeding material flow of the stripping tower, is condensed and cooled, and then is fed into a rectifying tower top reflux tank. According to the method and the system provided by the invention, the aromatic hydrocarbon in the pyrolysis gasoline can be recovered to the maximum extent, and the total energy consumption of the device is remarkably reduced.

This invention provides a selective hydrogenation catalyst for cracked gasoline, its preparation method, and its application. The catalyst comprises an active component, palladium, and a phosphorus-modified alumina-silica support. Based on catalyst weight, the content of the active component, palladium, is 0.10%–0.25%, and the average particle size of palladium is 2–3 nm. When used in the selective hydrogenation of cracked gasoline to remove conjugated dienes, the catalyst of this invention exhibits excellent diene hydrogenation rates. Compared with existing industrial cracked gasoline hydrogenation catalysts, the catalyst of this invention uses a lower palladium content at the same activity, significantly reducing catalyst costs.

A method of upgrading a hydrocarbon mixture includes providing a hydrogenation feed comprising a hydrocarbon mixture, the hydrocarbon mixture comprising hydrocarbons and an organic component; introducing the hydrogenation feed together with a hydrogen stream to a hydrotreating device to hydrogenate at least the organic component and produce a hydrotreated stream at an elevated temperature; introducing a dilution steam into the hydrotreated stream, thereby forming a hydrotreated stream / dilution steam mixture; preheating the hydrotreated stream / dilute steam mixture; and upgrading the hydrotreated stream / dilute steam mixture in a hydrocarbon upgrading furnace to form a cracked gas effluent wherein the hydrocarbons in the hydrocarbon mixture comprise naphtha, gas oil, pyrolysis gasoline, Fischer-Tropsch derivatives, natural gas condensate, C1-C4 hydrocarbons, or combinations thereof, the organic component is selected from one or more of an olefin, an alkylaromatic compound or an alcohol, and the hydrocarbon mixture comprises 0.01 wt% to 25 wt% of the organic component, based on the weight of the hydrocarbon mixture.