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133 results about "Oil refinery" patented technology

An oil refinery or petroleum refinery is an industrial process plant where crude oil is transformed and refined into more useful products such as petroleum naphtha, gasoline, diesel fuel, asphalt base, heating oil, kerosene, liquefied petroleum gas, jet fuel and fuel oils. Petrochemicals feed stock like ethylene and propylene can also be produced directly by cracking crude oil without the need of using refined products of crude oil such as naphtha.

Oil refinery production and purchase collaborative optimization method based on multi-agent reinforcement learning

The invention relates to an oil refinery production and purchase collaborative optimization method based on multi-agent reinforcement learning, and the method comprises the following steps: S1, constructing a production agent, a purchase agent and a production plan model, setting an action space, a state space and a reward function of a production agent and a purchasing agent and an environment updated based on a production plan model after the agents output actions; s2, setting action interaction, state interaction and reward interaction between the production agent and the purchasing agent; and S3, training a production agent and a purchasing agent by adopting an asynchronous MAPPO method based on the interaction set in the S2, obtaining actual oil refinery production data, and inputting the actual oil refinery production data into the trained production agent and purchasing agent to obtain an actual production and purchasing plan. Compared with the prior art, the method has the advantages of improving the production efficiency, reducing the operation cost, keeping the stock balance of crude oil and the like.
Owner:TONGJI UNIV

Information processing system, information processing method and program

To provide an information processing system, an information processing method, and a program that facilitate creation of authentication data to be submitted to a third-party organization.SOLUTION: In an information processing system in which a management server 200 is communicatively connected to a user terminal 100 via a communication network 300, the management server 200 comprises: a storage unit for storing information indicating a refinery and information indicating a manufacturer among business entities corresponding to at least either an upstream or a downstream of a supply chain; an information generation unit for generating information for receiving third-party authentication regarding palm oil handled by the refinery and palm oil handled by the manufacturer; and an output unit for outputting the generated information.SELECTED DRAWING: Figure 1
Owner:ZEROBOARD INC

Process for stable blend of waste plastic with petroleum feed for feeding to oil refinery units and process of preparing same

Provided is a blend of a petroleum feedstock and 1-20 wt. % of plastic, based on the weight of the blend, with the plastic comprising polyethylene and / or polypropylene, and the plastic in the blend comprising finely dispersed microcrystalline particles having an average particle size of 10 micron to less than 100 microns and less than 100 ppm chloride. A process for preparing a blend of plastic and petroleum is provided, comprising mixing together a petroleum feed and a plastic comprising polyethylene and / or polypropylene and heating the mixture in the range of from 550° F. to 700° F. The blend mixture is then hot filtered and then optionally treated with a chloride removal guard bed. The resulting blend can then be cooled and stored or sent directly to a refinery conversion unit.
Owner:CHEVRON USA INC

Process for stable blend of waste plastic with petroleum feed for feeding to oil refinery units and process of preparing same

Provided is a blend of a petroleum feedstock and 1-20 wt. % of plastic, based on the weight of the blend, with the plastic comprising polyethylene and / or polypropylene, and the plastic in the blend comprising finely dispersed microcrystalline particles having an average particle size of 10 micron to less than 100 microns, and less than 10 ppm chloride. A process for preparing a blend of plastic and petroleum is provided, comprising mixing together a petroleum feed and a plastic comprising polyethylene and / or polypropylene and heating the mixture above the melting point of the plastic, but less than 500° F. The blend mixture is then hot filtered with the resulting filtered blend mixture being heated to at least 500° F. The heated mixture can then be treated with a chloride removal guard bed. The resulting blend can then be cooled and stored or sent directly to a refinery conversion unit.
Owner:CHEVRON USA INC

Buton rock asphalt and light oil synergistic compound asphalt regenerant, preparation method thereof and asphalt regeneration method

The invention discloses a buton rock and light oil asphalt synergistic compound asphalt regenerant as well as a preparation method and an asphalt regeneration method thereof, and belongs to the technical field of road engineering materials. The buton rock asphalt and light oil synergistic compound asphalt regenerant comprises the following raw materials in parts by weight: 5-20 parts of activated buton rock asphalt powder, 70-90 parts of a light oil component, 1-5 parts of a plasticizer, 2-5 parts of a high-temperature stabilizer, 0.5-2 parts of a composite anti-aging system and 1-3 parts of a compatilizer. According to the regenerant, oil refinery waste and natural rock asphalt resources are fully utilized, performance complementation is achieved through scientific compounding, indexes such as needle penetration and ductility of aged asphalt can be remarkably recovered, high-temperature stability and aging resistance are greatly improved, the regenerant is suitable for regeneration engineering of high-proportion RAP, and the regenerant has the advantages of being low in cost, excellent in performance, remarkable in environmental protection benefit and the like.
Owner:BEIJING LUYOU MATERIAL TECH CO LTD

Processes for cofeeding waste plastic and bio feedstocks to a refinery processing unit

A continuous process for transporting one or more waste plastic feedstocks to a refinery processing unit, includes receiving, in a blending unit, one or more waste plastic feedstocks, one or more waste plastic-immiscible bio feedstocks and a recycled inert carrier fluid received from a refinery processing unit, generating, in the blending unit, a homogeneous solution comprising the one or more waste plastic feedstocks, the one or more waste plastic-immiscible bio feedstocks and the recycled inert carrier fluid, and processing the homogeneous solution in the presence of a catalyst under catalytic cracking conditions in the refinery processing unit.
Owner:CHEVRON USA INC

Processes for transporting waste plastics to a refinery processing unit

A continuous process for transporting a waste plastic feedstock to a refinery processing unit, includes forming a solution containing (i) about 1 to about 40 wt. %, based on the total weight of the solution, of one or more waste plastic feedstocks and (ii) a recycled inert carrier fluid received from a refinery processing unit, and processing the solution comprising the one or more waste plastic feedstocks and the recycled inert carrier fluid in the presence of a catalyst under catalytic cracking conditions.
Owner:CHEVRON USA INC

Systems for the control and use of fluids and particles in fuel applications including boilers, refinery and chemical fluid heaters, rotary kilns, glass melters, solid dryers, drying ovens, organic fume incinerators, and scrubbers

ActiveUS12352437B2Liquid fuel feeder/distributionLiquid fuel pretreatmentThermodynamicsExhaust fumes
Delivery mechanisms and distribution mechanisms are varied, adjusted, or modified based on a desired fuel application. Dimensions, flow rates, pressures, viscosities, temperatures, friction parameters, and combinations thereof may be varied, adjusted or modified. The fuel application may include a scrubber application. The scrubber application uses a delivery mechanism to deliver a wet or dry scrubbing agent at a low pressure to a distribution mechanism. The distribution mechanism distributes the scrubbing agent within the scrubbing chamber. The delivery mechanism is adjustable based on properties of a feedstock utilized to deliver the scrubbing agent, properties of a propellant, or properties of the scrubbing application. The distribution mechanism is adjustable based on desired distribution characteristics including shape, size, or velocity of drops, mists, or particles distributed. Location, processes, and by-products associated with output of the scrubbing application may be based on a stage of the scrubbing application.
Owner:KAMTERTER II LLC

Accurate gas leak detection using tuneable diode lidar systems

When using spectroscopic diode lidar to detect a gas of interest such as methane (CH4), detecting high concentration pathlength (CPL) values of the gas of interest may not actually indicate a plume or leak. In areas such as a refinery, where ambient gas levels may be routinely high, absorption from ambient gas measured over a long pathlength may produce the same CPL value as a much closer gas leak, leading to a false positive. By collecting and using lidar distance information in tandem with the CPL values determined from the lidar system spectroscopic measurements, the statistical properties of the dataset can be evaluated, and ambient concentrations of the gas estimated. A lidar dataset with revised values of CPL that adjusts for these measurements of ambient concentration may be created to provide better reliability for analysis and in for triggering alarms for potentially dangerous gas concentrations and leaks.
Owner:QLM TECH LTD

Bio-oil utilization system

Provided is a system for utilizing bio-oil, which can easily and effectively utilize bio-oil regardless of the properties and supply / demand balance of bio-oil while utilizing existing refinery equipment. The system is provided with an atmospheric distillation device, a bio-oil supply means, and at least one device selected from the group consisting of a gas recovery device, a hydrofining device, a naphtha fractionation device, a fluid catalytic cracking device, and a reduced pressure distillation device. The bio-oil supply means supplies the bio-oil, which is derived from biomass and has been subjected to a hydrodeoxygenation treatment, to the atmospheric distillation device together with a raw material oil including crude oil.
Owner:IDEMITSU KOSAN CO LTD

Method of removing asphaltenes from hydrocarbon streams using adsorbent media

PendingUS20250263605A1Refining with non-metalsOther chemical processesActivated carbonFixed bed
An asphaltene adsorbent media, its method of preparation and a process of removing asphaltenes from hydrocarbon streams are provided. The asphaltene adsorbent media can include activated carbon (AC), metal oxide and clay as the main ingredients and be installed upstream of a processing vessel or located within processing vessels such as a fixed bed reactor. The adsorbent media can be used to remove asphaltenes contained in hydrocarbon fluids within refineries for various processing units, chemical operations, and bio-operations.
Owner:CRYSTAPHASE PRODUCTS INC

Ionic polymers used as corrosion inhibitors in process streams in industrial systems and their method of obtaining

PendingUS20260167757A1MethacrylateIndustrial systems
The present disclosure relates to ionic copolymers and terpolymers derived from monomers such as 1-alkyl-3-vinylimidazolium halides, 1-vinylimidazole, acrylamide, n-vinylpyrrolidone, and poly(ethylene glycol) methyl ether methacrylate, and their use as corrosion inhibitors in process streams in industrial systems, more specifically in oil refinery streams. The corrosion inhibitors function at concentrations below 100 ppm, temperatures up to 60° C., and in the presence of congenital waters or synthetic brines.
Owner:INST MEXICANO DEL GASOLINEEO

Method for oxidative desulfurization of oil and liquid hidrocarbon fuel and reduction of harmful emissions of sulfur and carbon oxides

The invention relates to the field of oxidative desulfurization of oil and sulfur-containing liquid hydrocarbon fuels (including diesel fuel) and can be used to reduce harmful emissions and exhausts (in the form of sulphur oxide and carbon monoxide - SO2 and CO) of oil refineries, as well as various industrial enterprises (including energy), facilities and engines using hydrocarbon fuels. Method of oxidative desulfurization of oil and liquid hydrocarbon fuel and reducing harmful emissions of sulfur oxides and carbon provides a process of oxidation in tanks or pipelines by ozone (O3) or ozone-containing gases, in which sulfur oxides (SO2 and SO), without releasing them into the atmosphere, mix in a closed vessel or pipeline with carbon monoxide (CO) and by means of chemical reactions of sulfur monoxide decomposition (2SO↑ → SO2↑+S↓) and sulfur recovery (SO2↑ + 2CO↑ → S↓ + 2CO2↑) elemental sulfur (S) is extracted from oil or liquid hydrocarbon fuel and carbon monoxide (CO) is converted into its dioxide (CO2). The oxidation, also decomposition and recovery reactions are carried out one-step or sequentially, in the presence of oxidation-recovery group catalysts corresponding to these reactions, such as tert-Butyl hydroperoxide (C₄H₁₀O₂). Ozonized atmospheric air is used as ozone-containing gas.
Owner:KUREGYAN KAMO

Novel refining apparatus utilizing high-viscosity crude oil sludge

A high-viscosity crude oil sludge refining apparatus according to the present invention comprises: a decomposition furnace that generates oil vapor by breaking down carbon-carbon bonds in atmospheric residue having a boiling point of 350℃ or more generated in an atmospheric distillation process and evaporating the resulting components; and a condenser that produces liquid heavy oil by cooling the oil vapor generated in the decomposition furnace, through heat exchange.
Owner:JEONG HEUNG JE LABORATORY INC

Oil refinery production optimization method and device, medium and electronic equipment

The invention discloses an oil refinery production optimization method and device, a medium and electronic equipment, and the method comprises the steps: carrying out the refinery region division and refinery type division in an interactive interface according to the equipment installation position of a refinery device; on the basis of the divided refinery plant areas, determining product prices corresponding to the refinery plant areas by using a pre-trained profit optimization model; the optimization model is established by taking profit data maximization of the oil refinery as a target; determining equipment configuration information of the refinery plant device and raw material distribution proportion information of each piece of equipment; selecting and inputting at least one type of raw materials from the database samples; and based on all selected and input target production parameter information, optimizing the profit of a single refinery plant device and the comprehensive profit of the oil refinery by using an optimization model. According to the method, the complex process of the refinery is simplified, the optimization model covering the properties and types of various raw materials is established, a reverse raw material screening function is provided for the refinery, and the raw material with the highest cost performance is selected.
Owner:ZHESHANG FUTURES CO LTD

Processes for cofeeding waste plastic and BIO feedstocks to a refinery processing unit

A continuous process for transporting one or more waste plastic feedstocks to a refinery processing unit, includes receiving, in a blending unit, one or more waste plastic feedstocks, one or more waste plastic-immiscible bio feedstocks and a recycled inert carrier fluid received from a refinery processing unit, generating, in the blending unit, a homogeneous solution comprising the one or more waste plastic feedstocks, the one or more waste plastic-immiscible bio feedstocks and the recycled inert carrier fluid, and processing the homogeneous solution in the presence of a catalyst under catalytic cracking conditions in the refinery processing unit.
Owner:CHEVRON USA INC

Real-time optimization and closed-loop control method for carbon emission efficiency in oil refining process

The invention discloses a real-time optimization and closed-loop control method for carbon emission efficiency in an oil refining process, and the method comprises the steps: collecting control loop parameters and production and carbon emission data of an oil refinery, and carrying out the data preprocessing; performing feature construction and variable selection on the basis of a preprocessing result, and extracting important input variables with representativeness on carbon emission and yield; constructing a deep learning model architecture; training the deep learning model to obtain a trained deep learning model; performing system deployment according to the trained deep learning model; online verification is carried out on an oil refinery device, and the actual effect of the model on carbon emission control and yield optimization in a real production scene is evaluated; and based on a verification result, combining actual feedback data to carry out iterative optimization and continuous learning on the system, and verifying the effectiveness of the action generated by the optimized action model.
Owner:HUAQING HAOYUAN (BEIJING) TECHNOLOGY CO LTD

System, method, and apparatuses for near-zero emission modular oil refinery with flue-gas sequestration

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.
Owner:CLEAN REFINERIES INC

Smooth rate evaluation method and device for molecular level oil refining device

The invention relates to a method and a device for evaluating the stability of a molecular level oil refining device. Comprising the steps that feeding data and result data of a target molecular level oil refining device in multiple time units in an evaluation period are obtained, and the result data comprise yield data and physical property data of products; respectively inputting the feeding data of each time unit into a calculation model corresponding to each time unit for calculation to obtain a physical property data calculation value corresponding to the corresponding time unit; wherein the calculation model is obtained by performing regression optimization according to the yield data in the result data corresponding to the corresponding time unit; and calculating the stability rate of the target molecular level oil refining device according to the physical property data actual value and the physical property data calculated value of each time unit. According to the embodiment of the invention, a worker is guided to optimize the target molecular level oil refining device according to the stability rate, the process stability of the target molecular level oil refining device is improved, and the method has great significance for the technical development of molecular oil refining.
Owner:RICHFIT INFORMATION TECH +1

Monitoring chemicals and gases along pipes, valves and flanges

Detection and real-time reporting (via wireless to a remote receiver) of the release of harmful or otherwise unwanted chemicals or chemicals of corrosion into the environment and, more particularly, the undesired release of such chemicals from pipelines, supporting energy / electric / heating / cooling / storage / distribution infrastructure, refineries, chemical plants, factories, processing and manufacturing plants and equipment, storage tanks, engines, containers and the like. One or more detection devices can be placed nearby potential areas where leaks occur, or anywhere monitoring for leaks is desired. In some embodiments, the detection devices are integrated into components for monitoring said component for unwanted emissions.
Owner:HUMMER GREGORY J +1

Process for decontaminating petrochemical compositions obtained from chemical recycling of polymeric materials

The present invention relates to a decontaminating process for petrochemical compositions, said process comprising subjecting a hydrocarbon composition (A) comprising an inorganic and / or polar contaminant to the following steps: (i) a water washing treatment and (ii) an adsorption treatment, preferably wherein said inorganic and / or polar contaminant is a chlorine-containing contaminant. This process allows for the purification of hydrocarbon compositions, such as pyrolysis oil products obtained from the processing of waste plastic compositions, such that such hydrocarbon compositions can be suitable for processing in petrochemical and / or refinery operations.
Owner:SABIC GLOBAL TECHNOLOGIES BV +1

Magnetic filter system in the electromechanical equipment of the refineries

This system consists of two walls made of upvc material in the inner wall and the outer wall made of iron The upvc wall is placed inside the metal wall. A part called rotating cylinder, which contains a number of neodymium magnets with appropriate power inside the cylinder, and the task of this cylinder is to attract metal particles in the system, and around the axis of the small wall, we mean between two walls, another number of powerful magnets in the form of It is placed in a semi-circle and at an appropriate distance from each other, and these series of magnets are placed from the negative pole side to direct the particles to the rotating cylinder that has positive pole magnets. The cylinder, which has a Mardon shaft to rotate, and when cleaning the track, an electric motor installed on the assembly rotates the rotating cylinder, and the operator can clean the side of the particle receiver, which is the so-called garbage collector. A camera is embedded in the system to monitor this collection online. At the end and at the beginning of this set, two flanges are placed to connect the system to the pipeline, and in this way, it is easy to install and operate. With the installation of the system, whenever it is time to clean the pipeline, it is enough to turn off the system so that there is no gas in the line, then the operator rotates the rotating cylinder by means of an electric motor, opens the chamber door, and the metal dirt and metal particles that are attracted to the rotating cylinder to clear In order to use this evacuation system, due to its safe operation, it is not necessary to spend a lot of time to evacuate the particles, and it performs the evacuation of the particles in a very short period of time, and by turning off the refinery unit for 10 to 20 minutes, emergency evacuation operations are performed. does
Owner:ASKARI MEHDI

Process for stable blend of waste plastic with petroleum feed for feeding to oil refinery units and process of preparing same

Provided is a blend of a petroleum feedstock and 1-20 wt. % of plastic, based on the weight of the blend, with the plastic comprising polyethylene and / or polypropylene, and the plastic in the blend comprising finely dispersed microcrystalline particles having an average particle size of 10 micron to less than 100 microns and less than 100 ppm chloride. A process for preparing a blend of plastic and petroleum is provided, comprising mixing together a petroleum feed and a plastic comprising polyethylene and / or polypropylene and heating the mixture in the range of from 550° F. to 700° F. The blend mixture is then hot filtered and then optionally treated with a chloride removal guard bed. The resulting blend can then be cooled and stored or sent directly to a refinery conversion unit.
Owner:CHEVRON USA INC

Process for stable blend of waste plastic with petroleum feed for feeding to oil refinery units and process of preparing same

Provided is a blend of a petroleum feedstock and 1-20 wt. % of plastic, based on the weight of the blend, with the plastic comprising polyethylene and / or polypropylene, and the plastic in the blend comprising finely dispersed microcrystalline particles having an average particle size of 10 micron to less than 100 microns, and less than 10 ppm chloride. A process for preparing a blend of plastic and petroleum is provided, comprising mixing together a petroleum feed and a plastic comprising polyethylene and / or polypropylene and heating the mixture above the melting point of the plastic, but less than 500° F. The blend mixture is then hot filtered with the resulting filtered blend mixture being heated to at least 500° F. The heated mixture can then be treated with a chloride removal guard bed. The resulting blend can then be cooled and stored or sent directly to a refinery conversion unit.
Owner:CHEVRON USA INC

A high-safety steam utilization device for oil refineries

This utility model discloses a high-safety steam utilization device for oil refineries, belonging to the technical field of steam utilization devices. It includes a steam recovery cylinder and a cooling pipe. An oil inlet pipe and an oil outlet pipe are respectively connected to both sides of the side wall of the steam recovery cylinder, and both are connected to the cooling pipe. An exhaust pipe is connected to the side wall of the steam recovery cylinder, and an installation pipe is connected to the end of the exhaust pipe. A sealing pipe is fixedly installed inside the lower part of the installation pipe. The top surface of the sealing pipe is arc-shaped, and the outer wall of the sealing pipe is sealed to the inner wall of the installation pipe. A horizontal plate is fixedly installed horizontally inside the upper part of the installation pipe. A push spring is fixedly installed at the bottom of the horizontal plate, and a sealing valve is fixedly installed at the bottom of the push spring. The bottom of the sealing valve matches the top surface of the sealing pipe. Compared with the prior art, this device can automatically release excessive pressure inside the steam recovery cylinder, while further improving the utilization effect of excess steam.
Owner:WANGDA GRP CO LTD +1

A composite bacterial community for degrading methane in waste gas, a cultivation method thereof, and an application thereof

The present invention discloses a composite bacterial community for degrading methane in waste gas, a cultivation method thereof, and an application thereof. The present invention selects activated sludge from the reflux outlet of the aerobic tank of an oil refinery wastewater treatment station for screening and sedimentation concentration, uses loofah capsules to make a loofah capsule gel carrier, and uses it together with polyurethane sponge and ball ring filler as a carrier for fixing microorganisms. The carrier with fixed microorganisms is filled into a biological filter column, and single n-pentane, a composite pollutant of n-pentane and methane, and single methane are successively introduced for acclimation and cultivation. Finally, the acclimated biological filter column is applied to treat actual methane-containing waste gas. The cultivation method of the composite bacterial community for degrading methane in waste gas disclosed by the present invention has the characteristics of simple operation, economical and easy implementation, energy saving and environmental protection, and at the same time has the advantages of strong methane degradation performance, no secondary pollution, and easy engineering promotion. It can be used to treat organic waste gas with methane as a characteristic pollutant and has broad application prospects in the actual treatment of methane-containing waste gas.
Owner:HUNAN UNIV

High manganese alloyed steels for amine service

ActiveUS12630910B2Furnace typesHeat treatment furnacesCrack resistanceFerro-manganese alloy
The present invention relates to ferrous alloys with high strength, cost-effective corrosion resistance and cracking resistance for refinery service environments, such as amine service under sweet or sour environments. More specifically, the present invention pertains to a type of ferrous manganese alloyed steels for high strength and cracking resistance and methods of making and using the same for applications including, but not limited to, amine units used in oil and gas production, petroleum refining, and chemical production.
Owner:EXXONMOBIL TECHNOLOGY & ENGINEERING CO

Process for stable blend of polystyrene plastic with hydrocarbon feed for feeding to oil refinery units and process of preparing same

Provided is a composition comprising a blend of polystyrene and an aromatic-rich hydrocarbon feedstock. Also provided is a process for preparing a stable blend of polystyrene and an aromatic-rich hydrocarbon feedstock which can be stored or transported if desired. In one embodiment, the aromatic-rich hydrocarbon feedstock comprises light cycle oil, heavy gasoline, heavy reformate, an aromatic solvent, or a mixture thereof. The amount of polystyrene in the blend comprises no more than 20 wt. % of the blend. The blend can be passed to a conversion unit for conversion of the polystyrene.
Owner:CHEVRON USA INC

Method of producing pyrolysis products from a mixed plastics stream and integration of the same in a refinery

Method of producing pyrolysis products from mixed plastics along with an associated system for processing mixed plastics. The method includes conducting pyrolysis of a plastic feedstock to produce plastic pyrolysis oil; feeding the plastic pyrolysis oil to a first fractionator to separate the plastic pyrolysis oil into a distillate fraction including naphtha and diesel and a vacuum gas oil fraction; and feeding the distillate fraction to a three step hydrotreating operation. The three step hydrotreating operation includes feeding the distillate fraction to a first hydrotreating unit to remove di-olefins to produce a first product stream, feeding the first product stream to a second hydrotreating unit to remove mono-olefins to produce a second product stream; and feeding the second product stream to a third hydrotreating unit to remove sulfur and nitrogen by hydrodesulfurization and hydrodenitrogenation to produce a third product stream. Such system may be integrated with a conventional refinery.
Owner:SAUDI ARABIAN OIL CO

Circular economy for plastic waste to polypropylene and lubricating oil via refinery FCC and isomerization dewaxing units

A continuous process for converting waste plastic into recycle for polypropylene polymerization is provided. The process integrates refinery operations to provide an effective and efficient recycle process. The process comprises selecting waste plastics containing polyethylene and polypropylene and then passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a naphtha / diesel fraction, a heavy fraction, and char. The naphtha / diesel fraction is passed to a refinery FCC unit, from which is recovered a liquid petroleum gas C3 olefin / paraffin mixture. The C3 paraffins and C3 olefins are separated into different fractions with a propane / propylene splitter. The C3 olefin fraction is passed to a propylene polymerization reactor. The C3 paraffin fraction is optionally passed to a dehydrogenation unit to produce additional propylene and then the resulting C3 olefin is passed to a propylene polymerization reactor. The heavy fraction of pyrolyzed oil is passed to an isomerization dewaxing unit to produce a lubricating base oil.
Owner:CHEVRON USA INC