595 results about "Cycle oil" patented technology

The invention provides a catalytic conversion method for producing gasoline containing rich aromatic hydrocarbon. The catalytic conversion method comprises the following steps: cutting catalytic cracking light cycle oil to obtain a light fraction and a heavy fraction, performing hydrogenation treatment on the heavy fraction to obtain a hydrogenated heavy fraction, singly and respectively conveying the light fraction and the heavy fraction into different riser reactors of catalytic cracking devices, performing a cracking reaction in the presence of a catalytic cracking catalyst, and separating reaction products to obtain a product containing the gasoline which contains rich aromatic hydrocarbon and the light cycle oil. According to the method, single catalytic cracking devices are used for processing the light fraction and the hydrogenated heavy fraction of the light cycle oil to satisfy harsh conditions necessary for the catalytic cracking reaction of different fractions of the light cycle oil to the maximum, so as to produce catalytic gasoline containing rich benzene, toluene and xylene to the maximum.

The invention relates to a catalysis conversion method for producing aromatic compounds. According to the method, poor quality heavy cycle oil and residual oil are subjected to a hydrotreating reaction in the presence of hydrogen gas and a hydrogenation catalyst, and the reaction products are separated to obtain gas, naphtha, hydrogenated diesel oil and hydrogenated residue oil, wherein the hydrogenated diesel oil enters a catalysis cracking device and is subjected to a cracking reaction in the presence of a catalysis cracking catalyst, the reaction products are separated to obtain dry gas, liquefied gas, catalytic gasoline containing rich benzene, toluene and xylene, catalytic light diesel oil, distillates with a distillation range of 250-450 DEG C, and an oil slurry, and the distillates with the distillation range of 250-450 DEG C are conveyed to a residue oil hydrotreating device so as to be recycled. According to the present invention, the residue oil hydrogenation condition is completely utilized to achieve saturation of the aromatic ring in the poor quality heavy cycle oil to the maximal degree, such that the hydrogenated diesel oil maximally produce benzene, toluene and xylene during catalysis cracking.

The invention provides a catalytic conversion method for producing gasoline containing rich aromatic compounds. The catalytic conversion method comprises the following steps: cutting catalytic cracking light cycle oil to obtain a light fraction and a heavy fraction, performing hydrogenation treatment on the heavy fraction to obtain a hydrogenated heavy fraction, singly conveying the light fraction and the hydrogenated heavy fraction into catalytic cracking devices from different nozzles in a layering manner, performing a cracking reaction in the presence of a catalytic cracking catalyst, and separating reaction products to obtain a product containing the gasoline which contains rich aromatic compounds and the light cycle oil. According to the method, single catalytic cracking devices are used for processing the light fraction and the hydrogenated heavy fraction of the light cycle oil, and the light fraction and the heavy fraction enter the catalytic cracking devices in the layering manner, so that the harsh conditions necessary for the catalytic cracking reaction of different fractions of the light cycle oil can be optimized and satisfied to the maximum, so as to produce catalytic gasoline containing rich benzene, toluene and xylene to the maximum.

A method and system for recovering fines from a light FCC-type effluent gas. Cracked gases from the reactor are cooled by direct contact with circulating oil in an oil quench tower. The circulating oil also washes out the catalyst fines carried with the reactor effluent gas. A flow of the oil from the quench tower bottoms is sent through one of a pair of filters to remove fines and recycled to the tower. The other filter is in backwash operation using a compressed gas to remove the fines therefrom and into a surge drum. Fuel oil or quench oil is added to the drum to form a slurry, which carries the catalyst fines to the regenerator where the oil is combusted to supply the FCC system heat requirements. Since a minimum amount of fuel oil is generated in the FCC, fuel oil is imported to inventory the quench tower.

The invention discloses a method for enhancing the gas-liquid mass transfer of an ebullated bed hydrogenation reactor, which comprises the following processes of: introducing fresh raw oil, circulating oil and hydrogen into a microbubble generator arranged in front of the reactor, fully mixing to make the hydrogen dispersed in a liquid-phase material in the form of microbubbles, and performing hydrogenation and cracking reaction in the ebullated bed reactor. The method can improve the utilization rate of the hydrogen, reduce the volume ratio of the hydrogen to the oil, save operating cost andpromote the depth of the hydrogenation and cracking reaction.

The invention provides a method for producing light olefins and monocyclic aromatic hydrocarbons from heavy hydrocarbons. The method produces qualified catalytic cracking raw materials through hydrogenation by taking wax oil and residual oil as raw materials, returns light cycle oil and heavy cycle oil which are catalytic cracking by-products to a hydrogenation unit for the catalytic cracking rawmaterials at the same time, hydrogenates the catalytic cracking by-products together with the catalytic cracking raw materials, and then takes the obtained product as the catalytic cracking raw materials to produce light olefins and monocyclic aromatic hydrocarbons. By introducing the residual oil before a second reaction zone of hydrogenation, the method widens the sources of the catalytic cracking raw materials, increases the processing amount of low-value residual oil, and solves the problem of the heat balance of catalytic cracking units. The light and heavy cycle oil of catalytic cracking is introduced into the hydrogenation unit, hydrogenated and then taken as the catalytic cracking raw materials, so that the yield of high-value products of the catalytic cracking units can be increased, and the deactivation of hydrogenation catalysts is delayed.

The invention discloses a catalytic conversion method for a hydrocarbon oil raw material. The hydrocarbon oil raw material contacts the catalytic cracking catalyst in a catalytic cracking reactor, the reaction oil gas and a spent catalyst are separated, then the spent catalyst is made steam stripping and regeneration and then returns to the catalytic cracking reactor for repeated use, the reaction oil gas is fractionated to obtain dry gas, liquefied gas, gasoline, light circulating oil, heavy circulating oil and heavy oil; the light circulating oil and any diesel fraction are cut into the light fraction of the light circulating oil and the heavy fraction of the light circulating oil; the heavy fraction of the light circulating oil is mixed with the heavy circulating oil and contacts the hydrogen and the hydrorefining catalyst, the reaction effluent is separated to obtain gas, naphtha and hydrogenated diesel, the hydrogen is reclaimed and then is circularly used; the light fraction of the light circulating oil independently or the light fraction of the light circulating oil along with the hydrogenated diesel returns to the catalytic cracking reactor. The method converts the catalytic cracking circulating oil into the gasoline with low olefin content and high octane value, and improves the yield of the gasoline and the yield of the propylene.

A process for hydroprocessing hydrocarbons in a combined targeted pretreatment and selective ring-opening unit wherein the targeted pretreatment comprises at least two stages in a single liquid recycle loop. The process operates as a liquid-full process, wherein all of the hydrogen dissolves in the liquid phase. Heavy hydrocarbons and light cycle oils can be converted in the process to provide a liquid product having over 50% in the diesel boiling range, with properties to meet use in low sulfur diesel.

A process and apparatus are provided for upgrading steam cracker tars from steam crackers. The invention also relates to a steam cracking process and apparatus for reducing yields of tars produced from steam cracking while increasing yields of higher value products by heating steam cracker tar, in the presence of hydrogen donor compounds, e.g., tetralin. The hydrogen donor compounds can be provided in a hydrogen donor-rich hydrocarbon stream, e.g., light cycle oils, or low sulfur vacuum tower bottoms. The treated tar can be separated into gas oil, fuel oil and tar streams.

The invention relates to a deep processing method for shale oil, which comprises the following steps: placing shale oil, catalytic cracking light cycle oil and catalytic cracking heavy cycle oil into a shale oil hydrotreatment apparatus; placing the obtained hydrogenation generation oil and optional vacuum gas oil in a catalytic cracking apparatus, separating the reacted product to obtain ethane-containing dry gas, propylene and butylene-containing liquefied gas, monocyclic aromatics-rich catalytic cracking gasoline, catalytic cracking light cycle stock oil, catalytic cracking heavy cycle oil and catalytic cracking oil slurry; circulating catalytic cracking light cycle stock oil and catalytic cracking heavy cycle oil to the shale oil hydrotreatment apparatus. The deep processing method of shale oil is used for high value substances like ethane, propylene, butylene, benzene, toluene, xylene and the like, so that added value of the product can be greatly increased.

The invention discloses a liquid phase circular hydrogenation treatment method capable of improving mixed amount of hydrogen. The process flow adopted by the method comprises that: a liquid-phase material ( including fresh raw material oil, after-reaction circulating oil and circulating oil in a supergravity hydrogen mixing equipment) and hydrogen are filled into the supergravity hydrogen mixing equipment at the same time; and the hydrogen is torn and cut into lots of micro air bubbles through the high-speed rotation of a gas-liquid mixing impeller, a gas-liquid mass transfer efficiency is increased greatly, hydrogen is dissolved in the liquid-phase material in a saturated state, and the lots of micro air bubbles are dispersed in the liquid-phase material in an emulsified state so as to be brought into a reactor to undergo a hydrogenation reaction. In the method disclosed by the invention, the adoption of the supergravity hydrogen mixing equipment greatly promotes the dissolution of hydrogen and more effectively removes gas-phase impurities such as hydrogen sulfide and ammonia, so as to promote reactions such as hydrodesulfurization, denitrification, aromatic saturation and cracking.

The invention discloses a method of hydrocarbon oil liquid-solid two-phase hydrogenation; the method avoids the recycle hydrogen and the recycle hydrogen compressor; hydrogen is mixed with fresh raw oil and a part of recycle oil under the existence of solvent or diluent; after the gas is separated in the mixer, the mixture is fed into the reactor and is contacted with the catalyst for reaction after the gas is separated on top of the reactor; the other part of the recycle oil is mixed with hydrogen and solvent or diluent and the gas is separated; the mixture is all or partially fed into the bed of the catalyst; the effluent of the reaction is discharged from the bottom of the reactor for separation; the separated solvent or the diluent is used for recycle use; the liquid product is used as the product or the recycle oil; the solubility of hydrogen in solvent or diluent is more than the solubility of hydrogen in the mixture of fresh raw oil and solvent or diluent.

The invention discloses a hydrogenation and refining method of gasoline with poor quality, comprising the following steps: the base oil of gasoline contacts and reacts with hydrogenation protective agent at low temperature; after reaction effluent is mixed with circulation oil, the mixture sequentially contacts and reacts with hydrogenation desilication solvent and hyrorefining catalyst at high temperature; the reaction product is cooled and separated to obtain hydrogen-rich gas and refined gasoline fraction; and parts of refined gasoline fraction serves as circulation oil to return to the outlet of a first hydrogenation reaction area. The method can handle coker gasoline with high content of sulphur, nitrogen and olefin, and refined gasoline fraction can satisfy charging requirements of reforming pre-hydrogenation devices and steam cracking ethene preparing devices. The method of the invention can effectively slow coking speed of heating furnace tubes, greatly lowers pressure drop generation frequency of a main hydrogenation reactor, improves the operating severity of the main hydrogenation reactor and retards the deactivation speed of catalyst at the bottom of a refined reactor.

The invention relates to a combined method for processing inferior heavy oil. The method comprises the following steps: a heavy oil raw material is reacted in a contacted cracking unit, an obtained heavy oil fraction I enters into a hydrotreating unit, a contact agent with charcoal enters into a gasification unit for a gasification reaction, the generated hydrogen enters into the hydrotreating unit, a heavy oil fraction II is obtained by a reaction in the hydrotreating unit and enters into a catalytic cracking unit, heavy cycle oil obtained by reacting is returned to the hydrotreating unit, an oil slurry is returned to the contacted cracking unit, regeneration flue gas used as a gasifying agent is returned to the gasification unit. The method of the invention is used for processing inferior heavy oil, and integrates two functions of deep processing of inferior heavy oil and reasonable utilization of excessive carbonaceous residue, so that the hydrogen balance of heavy oil processing can be realized. The combined method of the invention is capable of effectively improving the catalytic cracking raw materials and reasonably utilizing heavy cycle oil, the oil slurry and regeneration flue gas generated by the catalytic cracking apparatus, thereby the treating capacity and economic benefit of the heavy oil catalytic cracking apparatus can be enhanced.

The invention discloses a method for hydrotreating heavy hydrocarbon. A hydrotreatment process comprises a pre-hydrogenation reaction zone, an up-flow hydrogenation reaction zone and a fixed bed-trickle bed reaction zone. The method comprise the following steps that: catalytic cracking slurry oil and/or catalytic cracking heavy cycle oil pass/passes through the pre-hydrogenation reaction zone; the pre-hydrogenation reaction zone adopts a fixed bed-trickle bed operation mode; both the reaction effluent of the pre-hydrogenation reaction zone and a residual oil raw material are jointly introduced into the up-flow hydrogenation reaction zone and the fixed bed-trickle bed reaction zone in turn; and the final reaction effluent is separated. The method of directly taking the catalytic cracking residual oil, the catalytic cracking heavy cycle oil and the like as fluxing oil of the residual oil raw material is changed, and the catalytic cracking residual oil and the catalytic cracking heavy cycle oil are pretreated to retard the coking of a catalyst and effectively prevent the generation of a bed layer hot point, so that stable operation of an up-flow reactor is guaranteed, the service life of the catalyst is prolonged, simultaneously the product quality is improved.

The invention discloses a heavy raw material hydrotreating-catalytic cracking method to increase propone productivity, which comprises the following steps: choosing light circling oil and or weight circling oil from catalytic cracking unit; adding into hydrogenation reaction zone with heavy cut oil; or adding into two hydrogenation reaction zone with different hydrogenation catalyst to react; getting effluent; cooling; separating; fractionating; getting heavy liquid phase fraction; moving catalytic cracking unit; separating the catalytic cracking reacting product; getting the final product. This invention can dispose cycloalkyl heavy raw material, which propone receiving ratio can increase by 5-7 percent dot.

A system and method of cracking hydrocarbon feedstocks is provided that allows for significant flexibility in terms of the desired product yield. An integrated process includes introducing the feedstock and hydrogen into a first hydrocracking reaction zone containing a first hydrocracking catalyst to produce a first zone effluent. The first zone effluent and optionally additional hydrogen are passed to a second hydrocracking reaction zone containing a second hydrocracking catalyst to produce a second zone effluent. The second zone effluent is conveyed to a fractionating zone to at least a low boiling fraction and a high boiling fraction, and optionally one or more intermediate fractions. The bottoms fraction is passed to a fluidized catalytic cracking reaction and separation zone, from which olefins and gasoline are recovered. At least a portion of remaining cycle oil is passed from the fluidized catalytic cracking reaction and separation zone to the first and/or second hydrocracking reaction zone.

The present invention discloses a sort of method for converting the inferior heavy oil and residual oil, the deasphalted oil and deoiled asphalt is fractionated by the solvent from the raw material of heavy oil and residual oil, wherein the deasphalted oil is delivered to the hydrotreating arrangement of the fixed bed, modifies the matter with the reaction of hydrogen and hydrogenation catalysts, the separated production includes the lightweight cut fraction and hydrocracking tail oil, the hydrocracking tail oil is delivered to the catalytic cracking unit, and cracked with the function of the cracking catalyst, the separated production includes light-weighted cut fraction, heavy recycle oil and slurry oil. The deoiled asphalt which is fractionated by solvent and catalytic slurry oil are delivered to the hydrogenation equipment of the suspension bed together, and are farther produced to get various of light-weighted cut fractions with the function of hydrogen and decentralized energizing agent. This method can effectively reduce the operation severity of the hydrotreating arrangement in the fixed bed and the hydrogenation plant in the suspension bed, and can improve the creation rate and the quality.

A catalytic cracking process and apparatus for preparing propene with high output features that two reactors are used to implement three-stage reaction. The raw oil is catalytically cracked in the 1st reactor. The 2nd reactor is used by the circulated oil and gasoline. The gasoline comes in the reactor from its lower part, where the gasoline is in contact with catalyst and then takes part in the reaction at 550 deg.C. Said circulated oil is cracked at upper part and lower temp. When the heat provided by gasoline resultant is higher than that needed by circulated oil reaction, the part of used catalyst is tapped back into the life segment of raw oil reactor.

The invention discloses a residual oil hydrotreating-catalytic cracking combined process method which includes a hydropretreating reaction zone, a hydrotreating reaction zone and a catalytic cracking reaction zone; the process method includes the following contents: a residual oil raw material, at least part of a catalytic cracking diesel oil fraction and hydrogen are mixed, and in turn pass through the hydropretreating reaction zone and the hydrotreating reaction zone which are in series connection, after gas-liquid separation of a hydrotreating reaction zone reaction effluent, a gas phase is recycled back to the hydropretreating reaction zone and/ or the hydrotreating reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for catalytic cracking reaction, a catalytic cracking reaction effluent is separated to obtain a dry gas, liquefied gas, a catalytic cracking gasoline fraction, a catalytic cracking diesel oil fraction, catalytic cracking heavy cycle oil and catalytic cracking oil slurry, and the catalytic cracking diesel oil is partially or totally recycled back to the hydrotreating reaction zone for hydrotreating reaction. The method can prolong the stable operation period of a device.

The invention discloses a hydrogenation cracking method of hydrocarbon, which consists of first reactor and second reactor, wherein the first reactor is refined hydrogen reactor or hydrogenation refining and hydrogenation cracking reactor; the second reactor is hydrogenation cracking reactor; the crude oil and flow material from second reactor enters in the first reactor with hydrogen to do hydrogenation refining reaction or hydrogenation refining and hydrogenation cracking reaction; the effluent from the first reactor is separated to obtain circulated hydrogen, object product and non-conversing oil; all or partial non-conversing oil can be circulating oil in the second reactor with hydrogen, which proceeds hydrogenation cracking reaction; the effluent from the second reactor enters in the first reactor; the composite hydrogen can be new hydrogen to supplement, which mixes gas with circulating hydrogen.

The invention provides a heavy oil reservoir artificial bubble oil throughput exploiting method. The method comprises the following steps of step 1, injecting solvent type foam liquid into an oil well; step 2, after the well is covered for proper time, opening the well to produce oil; step 3, when the daily oil yield is 1m<3>/d to 2 m<3>/d, stopping throughput production of the period, and repeating the step 1 to step 3, and when the gas yield is gradually reduced and the cycle produced gas-oil ratio is smaller than 5, performing step 4; step 4, injecting an oil-soluble viscosity reducer into the oil well; step 5, injecting a solvent type foaming agent into the oil well; step 6, after the well is covered for proper time, opening the well to produce oil; step 7, when the daily oil yield is 1m<3>/d to 2 m<3>/d, stopping throughput production of the period, and repeating the step 4 to step 6; step 8, when the cycle oil yield is smaller than 100 to 200m<3>, stopping production. By the exploiting method provided by the invention, the viscosity of crude oil can be greatly reduced, and the aim of greatly improving the primary gas-containing heavy oil reservoir recovery ratio is fulfilled due to the fact that bubble oil flow is artificially produced.

The invention discloses a method for separating catalytic cracking oil gas. The method comprises the following steps: oil gas produced by catalytic cracking reaction is introduced into a main fractionating tower; after distillation, materials discharged from a tower top are gasoline and gases with a molecular structure having less than 4 carbon atoms, and diesel, cycle oil and/or heavy diesel and slurry oil are separated sequentially by the main fractionating tower from top down; the gasoline and the gases with a molecular structure having less than 4 carbon atoms are introduced into a gasoline splitter and heavy naphtha are discharged from the bottom of the tower; light gasoline and gases with a molecular structure having less than 4 carbon atoms discharged from the top of the gasoline splitter are introduced into an FCC absorption and stabilization system to separate light gasoline light naphtha, liquid gas and dry gases. The method injects gases discharged from the tower top of the main fractionating tower into a middle part of the gasoline splitter, and arranges reflux on the top of the gasoline splitter and a reboiler at the bottom to improve the gasoline separation efficiency. The method uses the low-temperature energy of gases discharged from the top of the main fractionating tower to prevent the revaporization of directly cooled and liquefied gases and reduces energy consumption of the reboiler and cooling water of gasoline splitter.