51results about "Vacuum distillation" patented technology

A method of recycling waste lubricant. The method includes providing a waste lubricant-derived oil fraction, pretreating the waste lubricant-derived oil fraction, and hydrocracking the pretreated waste lubricant-derived oil fraction. The method has economic advantages in that waste lubricant can be recycled into fuel oil and high-grade lube base oil with a relatively high yield compared to a lube base oil manufacturing process utilizing only unconverted oil as a feedstock.

To provide a method for operating a distillation column that is compatible with various operations and saves energy.SOLUTION: A method of operating a distillation column and a distillation system comprises supplying at least one fraction distilled from the distillation column and / or a fraction corresponding to the one fraction to the distillation column in the distillation column that distills two or more fractions.SELECTED DRAWING: None

A process for processing condensate feedstock into one or more products including contacting condensate feedstock with steam; recovering in a volatilization device a vapor phase of hydrocarbons with a boiling point of less than 300° C. and a liquid phase of unvaporized hydrocarbons with a boiling point of greater than 300° C.; fractionating the liquid phase in a vacuum distillation column into one or more distillate fractions; hydroprocessing a light and a heavy VGO fraction in a hydroprocessing system to produce a hydroprocessed light and a hydroprocessed heavy VGO fraction and a diesel fraction; collecting the vacuum residue of the vacuum distillation column; and feeding the hydroprocessed heavy and light VGO fractions and the vapor phase to a steam cracking reactor to convert at least a portion of the hydrocarbons to one or more olefins and a pyrolysis oil stream.

The invention relates to a process for treating biomass oil comprising: (a) a step of supplying biomass oil selected from biomass pyrolysis oil, biomass hydrothermal liquefaction oil, lignin oil, and mixtures thereof; (b) a step of oxidizing the biomass oil supplied in step (a) in the presence of an oxidizing agent at a temperature of 90 °C or lower, this step producing an effluent containing at least partially oxidized biomass oil and water; (c) a step of distilling the effluent from step (b) under reduced pressure, separating a distillate containing water from a residue under vacuum to form a stabilized biomass oil with a reduced water content. Figure 1

A process for processing condensate feedstock into one or more products including contacting condensate feedstock with steam; recovering in a volatilization device a vapor phase of hydrocarbons with a boiling point of less than 300°C and a liquid phase of unvaporized hydrocarbons with a boiling point of greater than 300°C; fractionating the liquid phase in a vacuum distillation column into one or more distillate fractions; hydroprocessing a light and a heavy VGO fraction in a hydroprocessing system to produce a hydroprocessed light and a hydroprocessed heavy VGO fraction and a diesel fraction; collecting the vacuum residue of the vacuum distillation column; and feeding the hydroprocessed heavy and light VGO fractions and the vapor phase to a steam cracking reactor to convert at least a portion of the hydrocarbons to one or more olefins and a pyrolysis oil stream.

The present application relates to a kind of organic amine neutralizer for atmospheric and vacuum unit and its application, belong to neutralizer technical field.The neutralizer of the present application is compounded by multiple organic amines, and the main component is ethylene amine and ethanol amine.Directly according to formula, single-component organic amine is added to compound, it can also be prepared by two-step combination of first synthesis and then compounding, the latter can reduce cost, with higher economic benefit.The organic amine neutralizer of the present application is applied to refinery atmospheric and vacuum unit fractionating column top volatile line corrosion prevention, can replace conventional ammonia water.It has the following advantages: suitable for tower top volatile line environment in distillation range;easily soluble in water at dew point temperature, not corrosive in dew point area;with low melting point, good water solubility, no ammonium salt scale, not accumulated, not blocked;stable pH, easy to control;safe and environmentally friendly;good corrosion inhibition effect;excellent performance, high cost performance, etc.

The invention discloses a waste oil distillation regeneration system and method based on internal heating and internal circulation, and belongs to the technical field of waste oil regeneration treatment. The system comprises a distiller, a vacuum system, a condensation collection system, an electromagnetic heating device and a double stirring device. The electromagnetic heating device directly heats the distiller tank body through induction heating, and the heat efficiency reaches 90%-98%; the double-stirring device is composed of an outer-layer low-speed stirrer and an inner-layer high-speed stirrer, a forced internal circulation flow field is formed, heat transfer is enhanced, coking is prevented, it is ensured that the temperature of raw oil is uniform, and the overall temperature gradient is controlled within + / -0.5 DEG C. According to the method, through cooperative operation of vacuum pressure reduction, electromagnetic heating and internal circulation, efficient distillation is achieved, the yield of the base oil is remarkably increased, and energy consumption and operation cost are reduced. The system structure is simplified, traditional boilers and external pipelines are omitted, the stability and safety are greatly improved, the occupied area of equipment is small, the maintenance cost is low, and both environmental protection and economic benefits are achieved.

A system for refining crude oil to minimize emissions of toxic compounds in the atmosphere during refining. The crude oil is treated with viscosity-reductant additives, reducing viscosity by up to 50% and increasing API gravity by more than 2 points. The method of spray-cracking and vacuum-flashing of crude oil, the system separates light and heavy end chains within the reactor. The vapor is condensed into designer fuels using a multi-stage horizontal reverse condensate-condenser or closed-loop distillation tower. Process heater directs flue gases through high-salinity fluids, such as a brine-processing device to capture, sequester, or mineralize the CO2, CO, NOx, and other contaminants from the flue gases. This results in a significant reduction in emissions, a further reduction to near-zero emissions (>95-98%) is achieved by the combination of (1) the closed loop processes, tank blanketing and capturing, sequestering and mineralizing emitted flue gases from the heater combustion-exhaust.

The invention discloses a vacuum flash tower based on vacuum deep distillation and a crude oil processing system and method, and belongs to the technical field of petroleum refining. According to the method, vacuum residue at the bottom of a vacuum tower is subjected to secondary flash evaporation by additionally arranging a vacuum flash evaporation tower, and light components (mainly wax oil) in the vacuum residue are further recovered. The vacuum flash tower adopts a combined design of an upper packed tower section and a lower plate tower section, the packed tower section is used for absorbing light components, and the plate tower section is used for prolonging the residence time of residual oil. And part of vacuum third-line wax oil extracted from the side line of the vacuum tower enters the top of the flash tower as an absorbent, absorbs flash light components and then is refined back to the vacuum tower, so that the product quality is ensured. The vacuum flash tower and the vacuum tower share a vacuum system, and the tower pressure is maintained at 4 kPa. According to the method, the vacuum residue extraction rate is remarkably increased, vacuum equipment does not need to be additionally arranged, the problem that light-component metal and residual carbon exceed the standard in a traditional process is solved, and economic benefits are remarkable. The method is suitable for heavy crude oil processing and has the advantages of low equipment investment, simple operation and the like.

This invention relates to the field of distillation, specifically to a vacuum distillation column for mineral oil. It includes a column shell, inside which inner and outer circumferential plates are alternately arranged along the axial direction. A first flow channel is formed between the outer circumferential wall of the inner circumferential plate and the inner circumferential wall of the column shell. A second flow channel is formed in the middle of the outer circumferential plate. A first guide plate is provided on the upper surface of the inner circumferential plate, and a plurality of circumferentially evenly distributed first guide grooves are formed on the first guide plate, connecting the middle and edge of the inner circumferential plate. A second guide plate is provided on the upper surface of the outer circumferential plate, and a plurality of circumferentially evenly distributed second guide grooves are formed on the second guide plate, connecting the middle and edge of the outer circumferential plate. This invention allows the liquid phase to flow from the center to the edge on the inner circumferential plate and from the edge to the center on the outer circumferential plate via multiple paths, thereby preventing dead zones and improving separation efficiency and effect.

The invention belongs to the field of oil refining and petrochemical engineering, and particularly relates to a method for preparing low-sulfur petroleum coke from ethylene tar, which comprises the following steps: (1) adding ethylene tar into a reaction kettle, then introducing inert gas, and emptying air; (2) adding an initiator, a reducing agent, a chelating agent and an auxiliary agent in proportion according to the mass of the ethylene tar, stirring, and carrying out heating reaction; (3) after the reaction is completed, adjusting the pressure of the reaction kettle, putting the reaction kettle into a tin bath furnace which is heated in advance for reaction, and then blowing nitrogen for gas stripping; and (4) taking out the reaction kettle to obtain the low-sulfur petroleum coke. The low-sulfur petroleum coke with low sulfur content and low ash content is prepared by effectively utilizing the cheap ethylene tar and the preparation method, so that the additional value of the ethylene tar is improved, and powerful help is provided for the supply shortage of low-sulfur coke production.

Low polynuclear aromatic hydrocarbon (low-PAH) naphthenic lubricating oils or process oils are produced within a viscosity range (including but not limited to 30 SUS to 6000 SUS) at 100 °F by the following steps: pretreating pyrolysis oil to reduce the amount of one or more of minerals, metals, halides, alkenes, or olefins (e.g., by hydroprocessing); blending the treated or untreated pyrolysis oil with naphthenic oil in a feedstock blending and storage unit to produce at least one blended feedstock; and hydroprocessing the blended feedstock to produce a low-PAH naphthenic lubricating oil or process oil. The hydroprocessing step can include reacting the pyrolysis oil with hydrogen in the presence of a non-noble metal catalyst, and the hydroprocessing step can include reacting the blended feedstock with hydrogen in the presence of a non-noble metal catalyst to produce a naphthenic lubricating oil or process oil.

The invention relates to an atmospheric pressure residual oil reduced pressure distillation-visbreaking combined processing device and method, the combined processing device comprises: (1) a reduced pressure distillation heating furnace, the reduced pressure distillation heating furnace comprises a feed port and a discharge port; (2) a reduced pressure distillation tower, a tower bottom discharge port of which is connected with a feed port of the reduced pressure distillation heating furnace through a pipeline; a feed port of the viscosity reducing tank is connected with a discharge port at the bottom of the reduced pressure distillation tower through a pipeline; (4) a visbreaking flash tank, the middle feed port of the visbreaking flash tank is connected with the discharge port at the top of the visbreaking tank through a pipeline; and (5) a bottom discharge port of the viscosity reduction flash tank is connected with a coking device or a solvent deasphalting device. By improving the processing device and process, a visbreaking heating furnace and heating energy of the visbreaking heating furnace are omitted, materials are efficiently modified, and the yield of high-value products is greatly increased.

The invention relates to the field of distillation, in particular to a vacuum distillation tower for mineral oil. The tower comprises a tower drum, inner peripheral tower plates and outer peripheral tower plates are alternately arranged in the tower drum in the axial direction of the tower drum, a first overflowing channel is formed between the outer peripheral wall of each inner peripheral tower plate and the inner peripheral wall of the tower drum, a second overflowing channel is formed in the middle of each outer peripheral tower plate, and a first flow guide disc is arranged on the upper surface of each inner peripheral tower plate; a plurality of first flow guide grooves which are circumferentially and uniformly distributed are formed in the first flow guide disc, the first flow guide grooves are communicated with the middle part and the edge of the inner peripheral tower plate, a second flow guide disc is arranged on the upper surface of the outer peripheral tower plate, a plurality of second flow guide grooves which are circumferentially and uniformly distributed are formed in the second flow guide disc, and the second flow guide grooves are communicated with the middle part and the edge of the outer peripheral tower plate. According to the invention, a liquid phase can flow from the center to the edge on the inner peripheral tower plate and from the edge to the center on the outer peripheral tower plate in multiple paths, so that flowing dead angles are prevented, and the separation efficiency and effect are improved.

Embodiments of the disclosure provide a visbreaking system and method for upgrading heavy hydrocarbons. A heavy hydrocarbon feed is introduced to a furnace to produce a soaker feed stream. The soaker feed stream is introduced to a soaker to produce a soaker effluent stream. The soaker effluent stream is introduced to a fractionator to produce a visbreaker distillate stream and a visbreaker residue stream. The visbreaker residue stream and a water feed are introduced to a supercritical water reactor operated at supercritical conditions of water to produce an effluent stream. The effluent stream is introduced to a flash column to produce a gas phase stream including water and a liquid phase stream including water. A portion of the liquid phase stream and the heavy hydrocarbon feed is combined. Optionally, a portion of the gas phase stream and the heavy hydrocarbon feed is combined. Optionally, a portion of the gas phase stream is introduced to the fractionator.

Provided is a system for bio-oil utilization that can effectively exploit a bio-oil with ease without consideration of its properties and supply-demand balance while utilizing an existing oil refinery facility. The system for bio-oil utilization includes: an atmospheric distillation unit and a bio-oil-supplying mechanism; and at least one kind of unit selected from a gas-recovering unit, a hydrorefining unit, a naphtha-fractionating unit, a catalytic cracking unit, and a vacuum distillation unit. The bio-oil-supplying mechanism is configured to supply a bio-oil, which is derived from a biomass and is subjected to hydrodeoxygenation treatment, to the atmospheric distillation unit together with a stock oil containing crude oil.

The invention relates to the field of petroleum processing, in particular to processes allowing the production of valuable products from heavy residues. A method for processing heavy petroleum feedstock is proposed, the method comprising hydrocracking a feedstock in a slurry phase (SPH) followed by separation into a stream of an SPH-subjected feedstock and a heavy residue stream, wherein the heavy residue stream is a slurry of an unconverted high-boiling residue and an exhausted coal additive; hydrocracking the SPH-subjected feedstock in gas phase, followed by fractionation of hydrocracking products; separating the exhausted coal additive and the unconverted high-boiling residue by using a solvent; supplying the mixture of the unconverted high-boiling residue and the solvent after the separation step to a vacuum column to obtain a separated heavy residue; evaporating at least part of the separated heavy residue in a thin-film evaporator to obtain a concentrated hydrocracking residue and a heavy vacuum gas oil (HVOG); and using at least a part of the HVOG to obtain the solvent. The technical result resides in ensuring the possibility of obtaining valuable products from difficult-to-utilize products, and in ensuring the stabilization of hydrocracking processes of heavy petroleum feedstock.

The invention provides a fractionation method for reducing vacuum fractionation load and application thereof, and relates to the technical field of petrochemical engineering, and the fractionation method comprises the following steps: in the fractionation process, raw oil is firstly subjected to steam stripping and then is subjected to flash evaporation to obtain flash oil, and then the flash oil is subjected to vacuum fractionation, so that the vacuum fractionation load is reduced. According to the invention, the flash evaporation step is added between steam stripping and vacuum fractionation, and flash evaporation rapidly evaporates a part of light components under low pressure, so that the load of subsequent vacuum fractionation is reduced, the energy consumption and equipment requirements of a vacuum-pumping system are reduced, and the technical effect of reducing the gas phase load of the vacuum tower is achieved.

Systems and methods for producing one or more olefins using waste plastics and used lubricating oil are disclosed. Mixed waste plastic is processed in a pyrolysis unit to produce plastic derived oil. The plastic derived oil is subsequently blended with used lubricating oil to form a mixture. The mixture is then separated into (1) a light-end stream comprising C1 to C8 hydrocarbons and (2) a heavy hydrocarbon feed stream. The heavy hydrocarbon feed stream is then processed to produce a steam cracking feedstock stream. The light end-stream and / or the steam cracking feedstock stream are then flowed into a cracking unit to produce one or more olefins.

The utility model discloses a pressure reduction structure for refining rich aromatic hydrocarbon, which relates to the technical field of needle coke, is arranged between a rich aromatic hydrocarbon refining device and a needle coke device, and comprises a heating furnace and a pressure reduction device, the vacuum tower is connected with the heating furnace, so that the refined rich aromatic hydrocarbon enters the heating furnace after being heated to a proper temperature; the vacuum unit is connected with the vacuum tower; the feeding end of the side line pump is connected with the side part of the vacuum tower so as to guide out the separated light components; the oil evaporator is connected with the discharge end of the side pump; and the cooling assembly is connected with the oil evaporator so as to reduce the temperature of the separated light components. According to the utility model, light components in refined rich aromatic hydrocarbon can be separated, so that part of light components are prevented from being cracked into dry gas, economic benefits are increased, the temperature of the fractionating tower bottom of the needle coke device is increased, and the enrichment degree of tricyclic and tetracyclic aromatic hydrocarbon beneficial to production of high-quality needle coke in the refined rich aromatic hydrocarbon components is increased; and the quality of the needle coke is further improved.

The present disclosure provides a versatile process for producing valuable renewable hydrocarbons from triglyceride containing feedstock. In the stepwise process, the triglyceride containing feedstock is first split to provide a mixture comprising fatty acids, glycerol and water, from which a phase separation provides an oily phase, and an aqueous phase. Said oily phase comprising fatty acids is subjected to fractionation. Fractionation divides the fatty acids to specific fractions, which may be refined to products with controlled hydroprocessing. Products may comprise paraffinic renewable aviation fuel components, paraffinic renewable base oil, renewable paraffinic diesel fuel components, renewable paraffinic technical fluid, or any combination thereof.

The present invention discloses a method for fractionating easily coked materials. After the easily coked materials are heated in a distillation tower or a still of a distillation apparatus, the light components contained therein are collected after flowing out through the distillation column of the distillation tower or the distillation tube of the distillation apparatus. The method heats the easily coked materials in the still as follows: a portion of the relatively light components is collected at the distillation column or the distillation tube, and after heating, the components are mixed with the extracted bottom material of the still through a venturi ejector and sprayed back into the still, whereby the materials in the still are heated by the sprayed reflux components. The linear velocity of the fluid at the nozzle of the venturi ejector is controlled to be 50 m / s to 80 m / s. By heating the relatively light components that are evaporated and then returning them to the still, the temperature difference between the light components and the temperature in the still is relatively low, thereby reducing high-temperature coking. At the same time, the light components are sprayed into the still to play an impact stirring role, thereby accelerating the heat transfer rate and further reducing coking.

The invention relates to the technical field of petrochemical engineering, in particular to a production method of straight-run environment-friendly asphalt. The method comprises the following steps that 1, low-density naphthenic low-sulfur crude oil and high-density naphthenic low-sulfur crude oil are blended into mixed crude oil according to a certain proportion, the low-density naphthenic low-sulfur crude oil accounts for 60%-80% of the mass of the mixed crude oil, and the high-density naphthenic low-sulfur crude oil accounts for 40%-20% of the mass of the mixed crude oil; and 2, carrying out atmospheric and vacuum distillation on the blended mixed crude oil to obtain a residual oil fraction with an initial boiling point of more than 460 DEG C, namely the straight-run environment-friendly asphalt finished product with toxic and harmful aromatic hydrocarbons meeting requirements. According to the invention, the content of toxic and harmful polycyclic aromatic hydrocarbons in the asphalt is effectively reduced, and the environmental protection performance of the asphalt product is obviously improved.

The invention discloses a method for extracting and removing a nitrogen-containing compound in fuel oil by using an acidic natural eutectic solvent. The method comprises the following steps: forming the acidic natural eutectic solvent from L-proline, mandelic acid and water, forming L-proline, ascorbic acid and water, and forming L-proline and glycollic acid / lactic acid; the method comprises the following steps: adding nitrogen-containing fuel oil and an acidic natural eutectic solvent into a reactor according to a certain mass ratio, and stirring at a certain temperature; standing and layering to obtain an upper-layer low-nitrogen oil product phase and a lower-layer nitrogen-rich eutectic solvent phase; and performing back extraction on the lower nitrogen-rich eutectic solvent phase to obtain a nitride-containing organic phase and a eutectic solvent phase, and performing reduced pressure distillation after liquid separation to obtain a nitrogen-containing compound and a regenerated eutectic solvent. The acidic natural eutectic solvent disclosed by the invention is simple in preparation process, easily available in raw materials, low in price, green and non-toxic, capable of efficiently removing alkaline and neutral nitrogen compounds in fuel oil at the same time, and excellent in cycle performance.

The utility model discloses a lubricating oil base oil vacuum distillation device and relates to the technical field of lubricating oil base oil treatment. A supporting pipe and a positioning ring are welded on the base, the positioning ring is connected with a gear motor through a bolt and a nut, a shaft of the gear motor is fixedly connected with a rotating shaft through a jackscrew, the rotating shaft is in sealing connection with a center hole of the blind plate through a sealing ring, the rotating shaft extends into a lower end socket of the reaction kettle and then is fixedly connected with a supporting frame, and steel brushes are fully distributed on the lower portion of the supporting frame. The reaction kettle has the beneficial effects that the rotatable support frame and the steel brush are arranged at the bottom of the reaction kettle, after vacuum distillation is finished, the speed reducing motor is firstly started, impurities adhered in the sealing head are cleaned through the steel brush, and then the petroleum residue inlet and outlet pipe is opened to discharge the impurities, so that the operation is convenient and fast. The gear motor is hung below the positioning plate through the compression spring, and torque is transmitted through the bolt, so that the steel brush cleans the reaction kettle under the self-weight action of the gear motor, the rotating shaft and the supporting frame, and the cleaning effect is improved.

The utility model relates to a base oil extraction refining desolvation heating system, and relates to the technical field of waste oil recovery, and the base oil extraction refining desolvation heating system comprises a desolvation preheater, a desolvation tower, a desolvation reboiler and a desolvation condensation assembly. The extraction raffinate base oil is preheated through the desolventizing preheater and then discharged into the desolventizing tower, the heating time of the extraction raffinate base oil in the desolventizing tower is shortened, the extraction raffinate base oil in the desolventizing tower is circularly heated and reboiled through the desolventizing reboiler, then the extraction raffinate base oil is subjected to solvent removal rectification through the desolventizing tower, and the extraction raffinate base oil is recycled. The steam discharged from the desolventizing tower is temporarily stored after being condensed by the condensation assembly, meanwhile, the vacuum pump set enables the vacuum value in the desolventizing tower to be kept constant, meanwhile, the steam in the desolventizing tower is conveniently sucked into the condensation assembly, finally, the heating time of base oil in the desolventizing tower is shortened, and the desolventizing quality of the base oil is improved.

The invention belongs to the technical field of asphalt deliming and purification, and discloses a distributed grading deliming process and device for high-ash oil residues, and the specific technical scheme is as follows: the process adopts a treatment mode of solvent dispersion, grading parallel filter pressing and solvent recovery, each stage of filter pressing unit is provided with a plurality of pressure-adjustable hydraulic drive plunger filter presses, and each stage of filter pressing unit is provided with a plurality of pressure-adjustable hydraulic drive plunger filter presses; graded deliming is realized through three-stage gradient pore diameters, common, superior and special-grade low-ash asphalt products are produced, and meanwhile, a high-solid component is subjected to solvent removal and converted into a solid fuel; according to the device, a pressure-adjustable hydraulic drive plunger filter press is adopted, the filter press comprises an air cylinder barrel, a connecting barrel and a filter barrel which are sequentially arranged, the connecting barrel is provided with a filter pressing feeding port, the connecting barrel and the filter barrel are separated through a metal filter plate, the filter barrel is provided with a filter pressing discharging port, and a filter pressing piston is connected into the air cylinder barrel in a sliding mode; according to the device, the pressure can be accurately adjusted, no waste filter bag solid waste is generated, and the treatment efficiency and the productivity are greatly improved.

Used lubricating oils are fed to a dehydration / fuel stripping unit to create de-watered / defueled feedstock which is fed to a Vacuum Distillation Column ( VDC) to remove and send lighter fractions for processing into base oil. Vacuum Tower Asphalt Extender (VI' AE) is collected from the Vacuum Distillation Bottom (VDB) of the VDC and fed to a Solvent Deasphalting unit (SDA) along with a. hydrocarbon solvent, to create a Concentrated Asphaltene Polymer Residue (CAPR) containing concentrations of the depleted polymer additives and wear metals. In particular embodiments, the CAPR is used to create relatively high- grade asphalt binders suitable for paving applications.

A special solar energy water jacket heating furnace in vacuum mode for an oil field comprises a vacuum heating system and a water jacket furnace heating system; the vacuum heating system comprises a steam generator, a vacuum heater and an ejector; the water jacket furnace heating system comprises a water jacket furnace, a burner, a flue gas chamber, a U-shaped pipe and a chimney, the flue gas chamber and the U-shaped pipe are arranged inside the water jacket furnace, and an inlet and an outlet of the flue gas chamber are respectively connected with the burner and the chimney through flue gas pipes; and the vacuum heater is provided with a crude oil inlet and a crude oil outlet, the steam generator is provided with a first outlet and the first outlet is connected with the ejector. A method for heating crude oil is further disclosed.

A distillation system for the production of sustainable aviation fuel is provided. The system has a distillation tower. A liquid trap in the tower has a through channel to allow vapor to flow from below the liquid trap to above the liquid trap, and the liquid trap, which may comprise a tray, traps and retains the fuel. A pump pumps the fuel from the liquid trap through a cooler to the top of the distillation tower.