56 results about "Pyrolysis gasoline" patented technology

The present invention provides a hydrogenation catalyst, and a preparation method therefor and a use thereof. The catalyst of the present invention comprises an active component and a carrier, wherein the active component is composed of Ni, Mo, and P, and the carrier is a composite oxide comprising magnesium oxide, aluminum oxide, and silicon oxide; and on the basis of the weight of the catalyst, the mass ratio of Ni to Mo in the active component is 1.1-5, preferably 1.9-2.3, and Ni is calculated as NiO and Mo is calculated as MoO3. The active component of the catalyst of the present invention contains a high content of nickel. When used for the second-stage hydrogenation of cracked gasoline, the catalyst can be suitable for treating a raw material having a higher diene content, shows relatively strong monoolefin saturation performance and desulfurization and denitrification activity, can effectively inhibit carbon deposition, and has high stability. Therefore, the catalyst of the present invention is particularly suitable for use in industrial production of the second-stage hydrogenation of cracked gasoline or a fraction thereof.

The invention relates to the related technical field of pyrolysis gasoline first-stage selective hydrogenation catalysts, and particularly discloses a nickel-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving an aluminum (III) salt and a gallium (III) salt in a first solvent, adding a thickening agent, and uniformly mixing; then, sequentially carrying out aging, drying and first roasting in a protective atmosphere, so as to obtain an Al2O3-Ga2O3 carrier; step S2, dissolving a nickel (II) salt in a second solvent, and then adding the Al2O3-Ga2O3 carrier obtained in the step S1; and then, sequentially carrying out ultrasonic treatment, evaporating the second solvent to dryness, and carrying out secondary roasting in a protective atmosphere, so as to obtain the nickel-based catalyst. The nickel-based catalyst is prepared by the preparation method. The nickel-based catalyst is applied to first-stage selective hydrogenation of pyrolysis gasoline. The hydrogenation activity and selectivity of the nickel-based catalyst in first-stage selective hydrogenation of pyrolysis gasoline are greatly improved.

Processes and systems for making recycle content hydrocarbons, including olefins, from recycled waste material. Recycle waste material may be pyrolyzed to form recycle content pyrolysis oil composition (r-pyoil), at least a portion of which may then be cracked to form a recycle content olefin composition (r-olefin). In some cases, a heavy fraction from the cracker effluent may be used to form a recycle content pyrolysis gasoline composition (r-pyrolysis gasoline).

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.

The invention aims to provide the hydrogenation system for crude benzene, pyrolysis gasoline, naphtha and stable light hydrocarbon, which is stable in production and high in benzene yield. Comprising a pyrolysis gasoline storage device and a stable light hydrocarbon storage device, a discharge port of the pyrolysis gasoline storage device and a discharge port of the stable light hydrocarbon storage device are communicated with a feed port of a light hydrocarbon feed buffer tank, and a discharge port of the light hydrocarbon feed buffer tank is communicated with a feed port of a first heat exchanger; a hydrogenation device and a scorching air conveying device are further arranged between a discharging port of the light hydrocarbon feeding buffer tank and a feeding port of the first heat exchanger, a first discharging port of the first heat exchanger is communicated with a first feeding port of the second heat exchanger, and a first discharging port of the second heat exchanger is communicated with a feeding port of the first heater. A discharge port of the first heater is communicated with a feed port of the first liquid phase hydrogenation reactor, and a discharge port of the first liquid phase hydrogenation reactor is communicated with a second feed port of the second heat exchanger.

The invention discloses a pyrolysis gasoline first-stage catalyst and a preparation method thereof. The catalyst comprises an alumina and calcium phosphate composite carrier and a hydrogenation active component nickel, based on the weight of the catalyst, the content of nickel in terms of oxide is 10.0%-25.0%, the content of calcium phosphate is 2.5%-18.0%, and the content of alumina is 57.0%-87.5%. And the total infrared acid content of the catalyst is 0.45-0.75 mmol / g. The preparation method comprises the following steps: (1) adding calcium oxide into bottom water of a reactor, then adding an aluminum salt aqueous solution and a precipitant for gelling reaction, and then adding phosphoric acid for aging to obtain a filter cake; (2) pulping the filter cake, then adding the active metal impregnation liquid, and then adding organic acid to obtain active metal-containing modified alumina dry glue powder; and (3) uniformly mixing the active metal-containing modified alumina dry glue powder obtained in the step (2), a peptizing agent and an extrusion aid, carrying out extrusion molding, drying and roasting to obtain the catalyst product. The catalyst disclosed by the invention is applied to a pyrolysis gasoline first-stage selective hydrogenation process and has relatively high hydrogenation activity and selectivity.

The invention belongs to the technical field of chemical hydrogenation, and particularly relates to a hydrogenation method and system for crude benzene, pyrolysis gasoline, naphtha and stable light dydrocarbon, the method comprises the following steps: mixing and filtering pyrolysis gasoline and / or stable light dydrocarbon, heating at 40-45 DEG C for 3-5 seconds, heating to 45-50 DEG C, heating for 3-5 seconds, continuously heating to 70-75 DEG C for 3-5 seconds, and filtering to obtain the crude benzene, pyrolysis gasoline, naphtha and stable light dydrocarbon. Then carrying out hydrogenation reaction with a catalyst and hydrogen in a first liquid phase hydrogenation device at 100-105 DEG C for 10-20 seconds to obtain a hydrogenated liquid material; the method is stable in production and high in benzene yield.

The invention relates to the technical field of catalysts, in particular to a rare earth-based hydrogenation catalyst and a preparation method thereof. The preparation method comprises the following steps: modifying a carrier by phosphate, constructing a core-shell structure of a magnesium oxide-cerium oxide precursor, introducing a yttrium-cerium solid solution, and carrying out ultrasonic dispersion, calcination and reduction treatment to obtain the catalyst. The catalyst uses oxygen vacancy to reduce hydrogen dissociation energy barrier, and combines phosphate to inhibit green oil generation and a core-shell structure to resist sulfur poisoning, so that low-temperature efficient hydrogenation is realized. The catalyst prepared by the invention has the advantages of high deacetylation rate, good monoolefine selectivity, strong sulfur resistance and carbon deposition resistance and the like, and is suitable for industrial application of selective hydrodeacetylation of pyrolysis gasoline.

Systems and processes herein integrate a crude separation unit, a steam cracker unit, a fluid catalytic cracking unit, an aromatics processing unit, and a diprolene pyrolysis gasoline unit for separating a whole crude oil or other wide boiling hydrocarbon mixtures and for producing olefins and / or aromatics. Systems and processes herein provide various schemes to provide flexibility and valorize aromatics produced via steam cracker unit or fluid catalytic cracking unit by directly extracting and / or converting them into cycloalkanes and feeding them to a steam cracker unit to produce more valuable olefins.

Systems and processes herein integrate a crude separation unit, a steam cracker unit, a hydrocracker unit, an aromatics processing unit, and a pyrolysis gasoline hydrogenation unit for separating a whole crude oil or other wide boiling hydrocarbon mixtures for producing olefins and aromatics.

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 invention discloses a pyrolysis gasoline hydrogenation yield mutation prediction method considering time sequence characteristics, and the method comprises the following steps: S1, collecting pyrolysis gasoline hydrogenation real-time data; S2, inputting the real-time data into a pyrolysis gasoline hydrogenation yield mutation prediction model which is constructed by the following steps: S3, outputting a yield prediction result by the model. Prediction is carried out based on the method, the fitting capacity of mutation points is enhanced, the prediction error is small when the yield is mutated, and the practicability of the model is enhanced.

The present invention relates to the field of selective hydrogenation reactions, and discloses a pyrolysis gasoline selective hydrogenation method and applications thereof, the method comprises: feeding a raw material into a primary hydrogenation reactor, and carrying out a selective hydrogenation reaction through an upper bed layer and a lower bed layer; wherein the volume ratio of the upper bed catalyst to the lower bed catalyst is 1: (2-4); wherein the upper bed layer catalyst comprises a first alumina carrier, Pd and / or Pd oxide; the lower bed catalyst comprises a second alumina carrier, Pd and / or Pd oxide. According to the method, the raw materials and the catalyst with special structure and composition are subjected to hydrogenation reaction, the catalyst activity and selectivity are improved through matching of the volume ratio of the two hydrogenation catalysts, and the method can be used in industrial production of selective hydrogenation of pyrolysis gasoline and is beneficial to coupling utilization of device energy.

The invention relates to a crude oil processing method for producing chemicals and maximally producing ethylene, which comprises the following steps: carrying out pyrolysis gasoline hydrotreatment and pyrolysis gasoline extraction treatment on hydrocracking gasoline, second pyrolysis gasoline and third pyrolysis gasoline to obtain C6-C8 aromatic hydrocarbon; performing ethylene-propane cracking treatment on the first cracking dry gas, the second cracking dry gas, the third cracking dry gas and propane to obtain ethylene; and carrying out gas separation on the first cracked liquefied gas, the second cracked liquefied gas and the third cracked liquefied gas to obtain propylene, propane and C4 mixed hydrocarbon. According to the present invention, the catalytic cracking treatment of each fraction section of the crude oil is achieved, the resource utilization efficiency is improved, the maximum production of the low-carbon olefin and the C6-C8 aromatic hydrocarbon product is easily achieved, and the yield of the low-carbon olefin and the C6-C8 aromatic hydrocarbon product is improved.

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 present invention relates to the field of catalyst technology, and in particular to a rare earth-based hydrogenation catalyst and a preparation method thereof. The present invention uses a phosphate-modified carrier, constructs a core-shell structure of a magnesium oxide-cerium oxide precursor, and introduces an yttrium-cerium solid solution, and prepares a catalyst through ultrasonic dispersion, calcination, and reduction treatment. The catalyst utilizes oxygen vacancies to reduce the hydrogen dissociation energy barrier, combines phosphate to inhibit green oil formation, and resists sulfur poisoning of the core-shell structure, thereby achieving low-temperature and efficient hydrogenation. The catalyst prepared by the present invention has the advantages of high dealkyne rate, good monoolefin selectivity, strong sulfur and carbon deposition resistance, and is suitable for industrial application in selective hydrogenation and dealkyne removal of pyrolysis gasoline.

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 present invention discloses a pyrolysis gasoline hydrogenation catalyst, a preparation method thereof and an application thereof. The catalyst comprises a carrier and an active component nickel, the carrier comprises alumina and silica, wherein the alumina contains α-phase alumina and θ-phase alumina, and based on the mass of the alumina, the content of the θ-phase alumina is 75%-95%; in the catalyst, the pore volume of pores with a pore diameter of 5 nm-15 nm accounts for more than 50% of the total pore volume. The catalyst of the present invention is applicable to the selective hydrogenation reaction of the first stage of pyrolysis gasoline and has excellent diolefin hydrogenation activity.

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).

This invention relates to a crude oil processing method for producing chemicals and maximizing ethylene production. The method involves hydrocracking gasoline, second cracked gasoline, and third cracked gasoline undergoing cracked gasoline hydrotreating and cracked gasoline extraction to obtain C6-C8 aromatics; first cracked dry gas, second cracked dry gas, and third cracked dry gas are then subjected to ethane-propane cracking to obtain ethylene; and first cracked liquefied petroleum gas, second cracked liquefied gas, and third cracked liquefied gas are subjected to gas separation to obtain propylene, propane, and a C4 mixture. This invention achieves catalytic cracking of each fraction of crude oil, improving resource utilization efficiency and facilitating the maximization of low-carbon olefins and C6-C8 aromatics production, thereby increasing the yield of these products.

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 invention relates to a method for increasing yield of light aromatic hydrocarbons through catalytic cracking gasoline reconversion, and the method is characterized in that heavy aromatic hydrocarbons in a heavy oil cracking product can be efficiently converted into light aromatic hydrocarbons by treating a heavy oil raw material through a catalytic cracking reaction. The problems of high hydrogen consumption, harsh operation conditions and aromatic hydrocarbon loss caused by hydrotreating production of light aromatic hydrocarbon can be avoided; on the other hand, the problem that low-value heavy aromatics are difficult to utilize can be solved, and efficient utilization of resources is achieved. Moreover, the gasoline heavy fraction is reprocessed in a second reactor, and the second reactor is a dense-phase fluidized bed reactor, so that the gasoline heavy fraction can fully react, and the yield of the light aromatic hydrocarbon can be further improved. In addition, by adopting the method disclosed by the invention, low-carbon olefin can be produced as a byproduct, and the utilization rate of the raw materials is further improved.

Systems and processes herein integrate a crude separation unit, a steam cracker unit, a hydrocracker unit, an aromatics processing unit, and a pyrolysis gasoline hydrogenation unit for separating a whole crude oil or other wide boiling hydrocarbon mixtures for producing olefins and aromatics.

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 relates to a crude oil processing method that maximizes the production of chemical products and also produces marine fuel. The method involves hydrocracking gasoline, second cracked gasoline, and third cracked gasoline, followed by cracked gasoline hydrotreating and extraction to obtain C6-C8 aromatics; ethane cracking of first, second, and third cracked dry gas to obtain ethylene; gas separation of first, second, and third cracked liquefied gas to obtain a first stream of propylene, propane, and a C4 mixture; propane dehydrogenation to obtain a second stream of propylene; and blending of cracked slurry oil and a portion of the residue with hydrotreated heavy oil to produce low-sulfur marine fuel at low cost. This invention achieves catalytic cracking of each fraction of crude oil, improving resource utilization efficiency and facilitating the maximization of low-carbon olefins and C6-C8 aromatics production while simultaneously producing marine fuel, thereby increasing the yield of these products.

A method of upgrading a hydrocarbon mixture comprises providing a hydrogenation feed comprising a hydrocarbon mixture, the hydrocarbon mixture comprising a hydrocarbon and an organic component; introducing the hydrogenation feed to a hydrotreater with a hydrogen stream to hydrogenate at least the organic component and produce a hydroprocessed stream at an increased temperature; introducing dilution steam to the hydroprocessed stream, thereby forming a hydroprocessed stream / dilution steam mixture; preheating the hydroprocessed stream / dilution steam mixture; and upgrading the hydroprocessed stream / dilution steam mixture in a hydrocarbon upgrading furnace to form a cracked gas effluent, wherein the hydrocarbon in the hydrocarbon mixture comprises naphtha, gas oil, pyrolysis gasoline, Fischer-Tropsch derivatives, natural gas condensates, C1-C4 hydrocarbons, or combinations thereof, the organic component is selected from one or more of olefins, alkyl-aromatics, or alcohols, and the hydrocarbon mixture comprises from 0.01 wt.% to 25 wt.% organic component by weight of the hydrocarbon mixture.

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.