81results about "Gaseous mixture working up" patented technology

The invention relates to the technical field of petroleum separation product treatment, and discloses a petroleum refining separation product treatment device which comprises a desulfurization tower body, a gas inlet pipe and a gas outlet pipe are mounted on the surface of the desulfurization tower body, a demister is mounted on the inner wall of the desulfurization tower body, and a spraying mechanism is arranged on the inner wall of the desulfurization tower body. Water is supplied to the hollow spray pipe and the cavity of the mounting disc through the water supply device, the spray holes in the surface of the mounting disc can pre-spray petroleum gas entering the desulfurization tower body, then the petroleum gas is intercepted by the mounting disc, the petroleum gas uniformly enters the hollow spray pipe, and the petroleum gas is secondarily sprayed through the hollow spray pipe, so that the desulfurization efficiency is improved. A pushing part of the control assembly is matched with a rotating part, so that the angle of the baffle plate can be controlled, the speed of discharging petroleum gas from the hollow spray pipe is controlled, insufficient contact time caused by too fast airflow is reduced, uniform and sufficient contact between the petroleum gas and the desulfurization liquid is realized, and the residual quantity of sulfide is effectively reduced.

The invention relates to the technical field of dry gas treatment, and discloses a method and a device for preparing polymer grade ethylene by recovering C2 components in dry gas and application, the method comprises the following steps: (1) compressing the raw material dry gas and carrying out gas-liquid separation to obtain a gas phase and a liquid phase; (2) contacting the gas phase with an absorbent for C2 component absorption to obtain absorption tail gas and an absorption rich solution; (3) performing methane desorption on the liquid phase to obtain desorbed gas and a rich absorbent; (4) desorbing and separating the rich absorbent to obtain a lean absorbent and concentrated gas; (5) the concentrated gas is subjected to acid gas removal, dehydration and impurity removal and then sent to a deethanizer for separation of light components and heavy components, and a gas phase at the top of the tower serves as feed to enter an ethylene rectifying tower for separation of ethylene and ethane; and (6) extracting a polymer-grade ethylene product from the side of the body of the ethylene rectifying tower. The C2 component recovered by the method has the advantages of high purity, high recovery rate, simple process, low steam consumption, no need of a deoxidation reactor and a demethanizer, and low energy consumption of the device.

The invention discloses a pyrolysis gas desulfurization method, which comprises: (1) carrying out desulfurization treatment on crude oil pyrolysis gas in an isothermal bed and / or adiabatic bed reactor loaded with a desulfurization catalyst; wherein the desulfurization catalyst contains Al2O3, K, Mg, Ag and rare earth metal; and (2) carrying out regeneration treatment on the used desulfurization catalyst by using circulating ethane. According to the desulfurization method disclosed by the invention, efficient removal and refining of sulfur can be realized under the condition of lower temperature, other reactions of cracking gas cannot be triggered, and the desulfurization catalyst is regenerated by circulating ethane, so that repeated regeneration and use of the desulfurization catalyst can be realized. The desulfurization method provided by the invention has the advantages of simple flow, no additional reaction, no influence on downstream hydrogenation and separation processes, energy consumption saving and the like.

Provided is a method for upgrading a bio-based material, the method including the steps of pre-treating bio-renewable oil(s) and / or fat(s) to provide a bio-based fresh feed material, hydrotreating the bio-based fresh feed material, followed by separation, to provide a bio-propane composition.

A dividing wall column or a pair of conventional columns can be used to separate an unstabilized naphtha stream to produce an aromatics-free light naphtha stream as a feed for a catalytic cracking unit for olefins production.

A separation process and system to separate highly pure polymer grade propylene product from a liquefied petroleum gas stream combined. In examples, the system and method as combine the functions of a deethanizer and of a depropanizer, with a C3 splitter system to separate highly pure polymer grade propylene product from a liquefied petroleum gas stream, thus eliminating the need for separate dethanizer, depropanizer, and C3-splitter.

To provide a raw material supply system capable of improving efficiency of chemical recycling and preventing fouling and corrosion of equipment by appropriately treating PVC and PET contained in waste plastic before sending the waste plastic to a pyrolysis furnace.SOLUTION: The raw material feed system comprises a slaked lime feeder 12 for charging slaked lime into waste plastics, a melting demineralizer 18 for demineralizing PVC and hydrolyzing PET by mixing waste plastics and slaked lime while heating them, a degassing hopper 20 connected to the melting demineralizer 18, a raw material feeder 22 for feeding molten waste plastics in the degassing hopper 20 to the pyrolysis furnace 6, and a level sensor 31 for detecting the liquid level of molten waste plastics accumulated in the degassing hopper 20.SELECTED DRAWING: Figure 1

The invention discloses a high-efficiency low-energy-consumption solvent for removing organic sulfur in gas as well as a preparation method and application of the high-efficiency low-energy-consumption solvent, and belongs to the technical field of gas purification. The solvent is formed by compounding a physical absorption organic solvent, a chemical absorption alcohol amine solution and a nitrogen-doped activated carbon catalyst nanofluid. The nitrogen-doped activated carbon catalyst is prepared by taking coconut shell or shell activated carbon as a raw material, mixing the coconut shell or shell activated carbon with a high-content nitrogen compound, pickling, drying, grinding and calcining by a specific procedure, and the surface of the nitrogen-doped activated carbon catalyst is rich in nitrogen-containing functional groups. When the catalyst is dispersed in an alcohol amine-organic solvent mixed system, a stable carbon nanofluid can be formed, and the heat transfer and mass transfer performance of the system can be remarkably improved. The solvent integrates the advantages of physical absorption and chemical absorption, and shows high absorption capacity and rate in the desulfurization process by virtue of the synergistic effect of the nanofluid; in the regeneration process, the heat and mass transfer efficiency is improved, so that the energy consumption is obviously reduced, and the method is particularly suitable for treating industrial gas containing organic sulfur.

A method and system for integrating a steam cracking unit with a blue hydrogen unit wherein a methane-rich gas stream, a hydrogen-rich gas stream, or both from the steam cracking unit is fed to the blue hydrogen unit and a high purity hydrogen stream from the blue hydrogen unit is directed to the steam cracking unit.

A hydrocarbon separation system comprising a dividing wall column is disclosed. The dividing wall column having feed section, top section, bottom section, and side draw section. The top section may be configured to fractionate top product components to produce the first hydrocarbon fraction process stream containing C3 hydrocarbons. The side draw section may be configured to fractionate the second hydrocarbon fraction process stream containing C4 hydrocarbons and the bottom section may be configured to fractionate bottom product consisting of C5+ components to produce natural gasoline (NG) product stream. Corresponding process and apparatus for separation of hydrocarbon feed are disclosed.

A combined separation process and system for separating a high purity polymer grade propylene product from a liquefied petroleum gas stream. In an example, the systems and methods combine the functions of a dethanizing column and a depropanizing column with a C3 separation system to separate a high purity polymer grade propylene product from a liquefied petroleum gas stream, thereby eliminating the need for separate dethanizing columns, depropanizing columns, and C3 separation columns.

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.

Pyrolytic emissions often include molecularly decomposed hydrocarbons, as well as byproducts from pyrolytic processes. Unfortunately, legacy processing treats effluent streams, including pyrolytic emissions, as waste that is released into the air-even though such pyrolytic emissions streams often include greenhouse gases and pollutants such as carbon dioxide, nitrogen oxides, sulfur dioxide, volatile organic compounds, and particulate matter-the discharge of which contributes to global greenhouse gas emissions. Disclosed herein are pyrolytic emissions looping systems that include several reactors where each of the several reactors converts different hydrocarbons into different useful end-products, thus providing a way to continuously recycle the effluent gas stream from pyrolytic processes.

The application provides a catalytic cracking aid and a preparation method thereof. The composition of the catalytic cracking aid comprises: 3-11% of low-cell Y type molecular sieve, 18-50% of high-silicon mesoporous shape-selective molecular sieve, 10-48% of clay, 3-15% of aluminum oxide nanofiber, 3-8% of sheet-shaped aluminum phosphate, 6-40% of titanium-containing composite binder and 6-18% of pseudo-boehmite; wherein the titanium-containing composite binder is prepared by using waste liquid containing titanium tetrachloride generated in a polypropylene catalyst preparation process. The catalytic cracking aid can promote efficient conversion of heavy oil, reduce coke formation, improve total liquid yield, and simultaneously produce more high-octane gasoline.

The present invention provides a dry liquefied gas desulfurization system, which comprises: a pre-scrubber, which comprises a dynamic wave scrubbing pipe and a reverse spray scrubbing section connected with each other, the dynamic wave scrubbing pipe is provided with a sulfur-containing dry gas inlet and a semi-barren liquor inlet, and the reverse spray scrubbing section is provided with a desulfurization solvent inlet, a rich solvent outlet and a dry gas outlet; the dry gas desulfurization tower is provided with a dry gas inlet, a first lean solvent inlet, a semi-lean solution outlet and a desulfurized dry gas outlet, the dry gas inlet is connected with the dry gas outlet, and the semi-lean solution outlet is connected with the semi-lean solution inlet; the liquefied gas desulfurization tower is provided with a sulfur-containing liquefied gas inlet, a second lean solvent inlet, a desulfurized liquefied gas outlet and a desulfurization solvent outlet, and the desulfurization solvent outlet is connected with the desulfurization solvent inlet. The pre-scrubber is utilized, the technological process is optimized, solvent internal circulation and pre-washing functions are achieved, gradient utilization of the semi-barren solution and the desulfurization solvent is achieved, the circulation amount of the rich solvent is reduced, then energy consumption of the solvent regeneration link is reduced, and the economical efficiency of the desulfurization process is improved.

A method of making a selective hydrogenation catalyst includes forming a mixed phase alumina support having a BET surface area in the range of between approximately 30 to approximately 60 square meters / gram (m2 / g). The mixed phase alumina support includes alpha alumina and theta alumina. The method also includes impregnating the mixed phase alumina support with an impregnation solution having one or more metals selected from Group VIIIB, Group IB, or both of the Periodic Table of Elements to form an impregnated support, drying the impregnated support at a temperature in the range of between approximately 100 degrees Celsius (°C) and 150 °C to form a dried impregnated support, calcining the dried impregnated support at a temperature range of between 350 °C and approximately 500 °C to form a calcined impregnated support, and reducing the one or more metals on the calcined impregnated support at a temperature in the range of between approximately 400 °C and approximately 600 °C in the presence of hydrogen to form the selective hydrogenation catalyst.

The present invention relates to a process for recycling a solid rubber-based material, a recycling unit for carrying out said process. The present invention further relates to a process a process for manufacturing a solid rubber-based material, preferably a tire, using a product obtainable or obtained by the aforementioned process and a recycling process for preparing a pyrolysis oil from a solid rubber-based material obtained from the aforementioned process.

A process for producing light olefins comprising thermal cracking. Hydrocracked streams are thermally cracked in a steam cracker to produce light olefins. A pyrolysis gas stream is separated into a light stream and a heavy stream. A light stream is separated into an aromatic naphtha stream and a non-aromatic naphtha stream. The aromatics can be saturated and thermally cracked. The integrated process may be employed to obtain olefin products of high value from a crude stream.

The application provides a catalytic cracking aid and a preparation method thereof. The composition of the catalytic cracking aid comprises: 15-55% ZSM-5 molecular sieve on a dry basis, 0-55% clay on a dry basis, 1-15% alumina nanofiber on a dry basis, 1-10% sheet-shaped aluminum phosphate on a dry basis, 4-70% titanium-containing composite binder on a dry basis, 0-10% binder in terms of oxides, 5-20% phosphorus in terms of oxides and 0-5% modified metal compound in terms of oxides; wherein the preparation of the titanium-containing composite binder utilizes waste liquid containing titanium tetrachloride generated in a polypropylene catalyst preparation process. The catalytic cracking aid can promote the conversion of heavy oil in a catalytic cracking process, increase the total liquid yield (liquefied gas + gasoline + diesel) while increasing the yield of ethylene / propylene and other low-carbon olefins, reduce the coke yield, and has excellent cracking reaction selectivity and use performance.

The invention provides a system and a method for reducing ethylene loss of a light cracking raw material, and belongs to the field of petrochemical industry. The system comprises a compression unit, wherein pyrolysis gas is introduced into an inlet of the compression unit; the multi-stage cooling and separating unit comprises at least three stages of coolers and corresponding separating tanks, and an inlet of the multi-stage cooling and separating unit is communicated with an outlet of the compression unit; an inlet of the demethanizer is respectively communicated with liquid phase outlets of all stages in the multi-stage cooling and separating unit; the first expansion compressor unit is communicated with a gas phase outlet of the last stage of the multi-stage cooling separation unit and a tower top gas outlet of the demethanizer; an inlet of the second expansion compressor unit is communicated with a tower top gas outlet of the demethanizing tower, and an outlet of the second expansion compressor unit is communicated with an inlet of the compression unit. The system provided by the invention reduces the loss of ethylene along with hydrogen from two aspects of separation precision and circulation optimization, and finally reduces the loss of ethylene in the methane hydrogen product.

In a fluidized catalytic cracker (FCC) unit operating in petrochemical mode, it has increased dry gas and LPG production, which creates a bottleneck in the product stream, a method is provided for completely or partially separating a light gas component from a moisture compressor suction port stream and directing it directly to an untreated fuel gas header using a system in parallel with an existing moisture compressor that includes an auxiliary compressor and a membrane separation system.

The invention provides a crude oil gas light component recovery system and method for an underground water-sealed cave depot and application, and relates to the technical field of oil gas recovery, the recovery system comprises an oil gas recovery facility unit, a light component enrichment unit and a light component treatment unit which are arranged in an iterative communication mode; the light component enrichment unit is used for selectively collecting light components at a light component gathering position in the oil gas recovery facility unit; and the light component treatment unit is used for treating the light components collected by the light component enrichment unit in a targeted manner. The problem of infinite circulation of light component enrichment in a recovery system is specifically solved, the crude oil gas recovery effect is fundamentally and systematically improved, the operation process is simple, the operation difficulty is small, the problems of environment pollution, potential fire blast risk and the like caused by overflow of light component oil gas can be avoided, and the method is suitable for popularization and application. The technical effects of selectively and efficiently separating and storing the light component gas phase, efficiently maintaining for a long time, optimizing the system stability, improving the system efficiency, prolonging the service life and reducing the maintenance cost are achieved.

The present invention belongs to the field of petrochemical industry, and discloses a method for selective hydrogenation of butadiene extraction tail gas and a selective hydrogenation apparatus thereof. The method for selective hydrogenation of butadiene extraction tail gas comprises: (1) an alkyne-containing tail gas from a butadiene extraction unit is fed into a raw material tank, optionally impurities entrained in the alkyne-containing tail gas are removed before being fed into the raw material tank; (2) a C4 raw material in the raw material tank is pressurized by a feed pump to a pressure required for reaction, then merged with a circulated C4 stream from a first-stage reactor outlet buffer tank and fed into a first-stage mixer, wherein it is mixed with hydrogen gas, and fed into the first-stage reactor to undergo a first-stage hydrogenation reaction, and a first-stage reaction stream obtained by the reaction is fed into the first-stage reactor outlet buffer tank; the hydrogen gas required for the reaction in the first-stage reactor is fed through a first feeding mode or a second feeding mode: the first feeding mode comprises: all the hydrogen gas required for the reaction is fed through the first-stage reactor outlet buffer tank, and then fed into the first-stage reactor through a first route at an outlet of the first-stage reactor outlet buffer tank; the second feeding mode comprises: a part of the hydrogen gas required for the reaction is fed through the first-stage reactor outlet buffer tank, and then fed into the first-stage reactor through the first route at an outlet of the first-stage reactor outlet buffer tank; and the other part of the hydrogen gas is fed through the first-stage mixer, and then fed into the first-stage reactor; (3) there is no gas-phase discharge from the first-stage reactor outlet buffer tank, and a liquid-phase product is divided into at least two streams, the first stream is returned to the first-stage reactor as the circulated C4 stream, and the second stream is used as a feed to a stabilization tower or subjected to further hydrotreatment prior to being fed into the stabilization tower; (4) a C4 hydrogenation product is recovered after separation in the stabilization tower.

The invention belongs to the field of petrochemical industry, and discloses an absorption stabilization system taking stabilized gasoline as a re-absorbent in a catalytic cracking device and a rectification method. The absorption stabilization system is improved on the basis of an existing absorption stabilization system, the tower bottom of a stabilization tower is connected with the tower top of a re-absorption tower through a pipeline, the tower bottom of the re-absorption tower is connected with a pipeline between a gas-rich air cooler and a water cooler through a pipeline, and a water cooler and a third-stage gas-rich compressor are arranged between a second-stage gas-rich compressor and the air cooler. A pipeline for connecting the second-stage rich gas compressor and the water cooler is connected with the top of the desorption tower through a pipeline; and a pipeline for connecting the third-stage rich gas compressor and the air cooler is connected with the acidic water outlet through a pipeline. The system adopts stable gasoline as a re-absorption tower absorbent, a supplementary absorbent of the absorption tower is shut down, bottom oil of the absorption tower does not enter a condensation oil tank, and return of rich diesel oil to the tower is canceled. The invention also discloses a rectification method. The absorption effect is enhanced, the diesel oil process is simplified, and the energy consumption and the cost are reduced.

The present disclosure relates to a method for absorption stabilization process, which comprises: cooling, pressurizing and separating an upstream product to obtain a gas-rich phase and a condensed oil phase; subjecting the gas-rich phase, a supplementary absorbent and the liquid phase product to absorption treatment under a pressure of 1.7-2.8 MPa (G) to obtain an absorption gas phase and an absorption oil phase; subjecting the absorption gas phase to refrigeration separation to obtain a hydrogen-rich dry gas and a condensed oil; mixing the condensed oil with the condensed oil phase and subjecting the mixture to desorption treatment under a pressure of 0.6-1.5 MPa (G) to obtain a desorption gas and a desorption oil phase; and subjecting the desorption oil phase to treatment by a stabilizing tower and a depropanizing tower in sequence to obtain a propane product, a C4-C5 component product and a C6+ component product. The present disclosure forms a differential pressure condition between the absorption treatment and the desorption treatment to carry out the absorption stabilization process, which can reduce the energy consumption of the system while ensuring the quality of the products.

To provide a raw material supply system that can improve the efficiency of chemical recycling and prevent fouling and corrosion of equipment by appropriately treating PVC and PET contained in waste plastics before sending the waste plastics to a pyrolysis furnace. [Solution] The raw material supply system includes an operation control unit 15 that issues a command to a slaked lime supply device 12 to add to the waste plastic 1 to 4 times the total number of moles of slaked lime as the total number of moles of PVC and PET in the waste plastic, a melting desalination device 18 that desalinates the PVC and hydrolyzes the PET by heating and mixing the waste plastic and slaked lime, a degassing hopper 20 connected to the melting desalination device 18, a raw material supply machine 22 that sends the molten waste plastic in the degassing hopper 20 to a pyrolysis furnace 6, and a level sensor 31 that detects the liquid level of the molten waste plastic accumulated in the degassing hopper 20.

A hydrocarbon separation system comprising a dividing wall column is disclosed. A catalytic olefins converter is configured to receive a hydrocarbon feed and to produce an effluent. The dividing wall column includes a feed section, top section, bottom section, and side draw section. The feed section is configured to receive and to partially fractionate C3 and hydrocarbon stream. The top section configured to fractionate top product components to produce the first hydrocarbon fraction process stream containing C1, C2-C4 hydrocarbons. The side draw section configured to fractionate the second hydrocarbon fraction process stream containing C5 rich stream hydrocarbons and the bottom section configured to fractionate bottom product components to produce cracked natural gasoline (NG) product stream. Corresponding process and apparatus for separation of hydrocarbon feed are disclosed.

The invention belongs to the field of olefin production devices, and relates to a refinery saturated dry gas recovery device and a refinery saturated dry gas recovery method. The device comprises a refinery saturated dry gas feeding pipeline, a washing liquid feeding pipeline, a pretreatment treatment unit, a cold box, a tail gas removal tower feeding tank, a dry gas tail gas removal tower and a heavy component removal tower, the refinery saturated dry gas feeding pipeline is sequentially connected with the pretreatment treatment unit, the cold box and the tail gas removal tower feeding tank; a top discharging pipeline of a tail gas removal tower feeding tank is sequentially connected with the cold box and the middle part of the dry gas tail gas removal tower, a bottom discharging pipeline of the tail gas removal tower feeding tank is connected with the lower part of the dry gas tail gas removal tower, and a washing liquid feeding pipeline is sequentially connected with the cold box and the upper part of the dry gas tail gas removal tower; a tower bottom discharge pipeline of the dry gas tail gas removal tower is connected with a heavy component removal tower; and the heavy component removal tower is provided with a heavy component removal tower top discharge pipeline and a liquefied gas discharge pipeline. By adopting the device provided by the invention, the C2 component recovery rate in the saturated dry gas can be increased to 99.6%, and the C3 and C4 component recovery rate is more than 98.0%.