148results about "Gaseous mixture working up" patented technology

The presently disclosed concepts relate to systems and methods for effluent stream abatement via pyrolytic emission looping. In use, the systems and methods include a feed gas stream, and at least one dissociating reactor that receives the feed gas stream. The at least one dissociating reactor outputs, at least in part, a carbon allotrope material and a discharge pyrolytic emissions stream. Additionally, a gas separating system is used to separate the discharge pyrolytic emissions stream into at least one species component, where the at least one species component is added to at least the feed gas stream.

The present disclosure relates to a process for removal of carbonyl impurities from a mixed hydrocarbon stream obtained from naphtha and gas stream cracking processes. The process of the present disclosure is simple, economical and environment friendly. The process of the present disclosure is efficient in removing higher amounts of carbonyl impurities. The process of the present disclosure can be easily scaled up for commercial purposes.

The invention relates to a process (100, 200) for producing one or more hydrocarbons in which a first feedstock stream (A) is subjected to steam cracking (10) to obtain a first product stream (B), and an ethane-containing second feedstock stream (C) is subjected to oxidative dehydrogenation (20) to obtain a second product stream (D), wherein at least some of the first product stream (B) is subjected to processing (12) which comprises selective hydrogenation (125) of hydrocarbons having two carbon atoms and demethanisation (126) to obtain hydrocarbon fractions (C2H4, C2H6), wherein at least some of the second product stream (D) is subjected to trace removal (24) which comprises the removal of oxygen and / or acetylene to obtain a subsequent stream (E), and wherein at least some of the subsequent stream (E) is fed to the processing (12) at a position downstream of the selective hydrogenation (125) and upstream of the demethanisation (126).At least some of the subsequent stream (E) is subjected to the removal (25) of carbon dioxide upstream of the feed-in point to the processing (12). The present invention also relates to a corresponding system.

The present invention provides systems and methods for preventing the accumulation of light fractions such as methane, ethylene, and ethane in an olefin / paraffin separation system that uses a combination of a membrane and a distillation column for the separation. In one embodiment, a small stripper column is provided downstream of a selective hydrogenation reactor. In another embodiment, a pressure regulating vessel with a receiver is added to the retentate stream of the membrane unit.

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.

Provided is a method for preparing fuel of cracking furnace that includes: preparing a first methane off-gas stream derived from a liquid cracking furnace and a second methane off-gas stream derived from a gaseous cracking furnace, diverging a portion of the first methane off-gas stream into a methane off-gas export stream and obtaining a first fuel gas stream from the rest of the stream, obtaining a second fuel gas stream from the second methane off-gas stream, mixing the first and second fuel gas streams to prepare a mixed fuel gas stream, and mixing a hydrogen gas stream with the mixed fuel gas stream.

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.

The invention belongs to the field of oil refining and chemical engineering, and relates to a comprehensive saturated light hydrocarbon recovery method and device capable of flexibly adjusting recovery components. The method has the following advantages: the naphtha-containing liquid phase after the atmospheric and vacuum distillation unit, each hydrofining unit and the sulfur-containing gas phase are pressurized and cooled is concentrated and stabilized, the content of heavy components in the sulfur-containing rich gas is reduced, and the foaming risk of the gas phase desulfurization tower is reduced; the tail gas of the whole plant is uniformly brought into a recovery range, so that the recovery range is enlarged, and the loss of C2 and above components is reduced; an atmospheric and vacuum distillation unit and a hydrocracking unit are not required to be independently provided with an absorption stabilizing system, so that the secondary separation problem of key components is reduced; crude hydrocarbon after desulfurization and mercaptan removal and crude hydrocarbon condensed by a cooler at an outlet of a third raw material gas compressor are sent to the middle section of the absorption tower, C3-C5 components contained in the raw materials are used as absorbents, the amount of circulating C4 is reduced, and energy consumption is reduced; according to the needs of a refinery plant, whether C2 components need to be recycled or not can be flexibly adjusted, and adaptability is high.

The invention provides an acidic mesoporous material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing NaY molecular sieve crystallization mother liquor with an aluminum source solution and a pore-enlarging agent, then adjusting the pH value to 7-10 by using an acidic solution to obtain a mixed solution, and reacting the mixed solution at 60-100 DEG C to obtain gel; mixing the gel with water of which the mass is 3-6 times that of the gel, adjusting the pH value to 3-4 by using an acidic solution, and filtering, washing and drying to obtain an acidic mesoporous material; wherein the aluminum source comprises at least one of aluminum sulfate, aluminum nitrate and aluminum chloride. The acidic mesoporous material prepared by the technical scheme provided by the invention has the characteristics that the aperture meets the heavy oil cracking / cracking requirement, the acidity is strong, the pore volume is large, and the specific surface area is high, is suitable for being used as a substrate material component of a heavy oil catalytic cracking / cracking catalyst, and can obviously improve the heavy oil conversion rate.

The application discloses a refinery dry gas C2 and above component recovery system and recovery method, and belongs to the technical field of pressure swing adsorption gas separation. The system comprises a pressure swing adsorption purification unit, a vacuum pump group connected with the pressure swing adsorption purification unit, a compressor and a rectifying tower, wherein the compressor condensate outlet is connected with a condensate conveying pipe, the condensate conveying pipe is connected to the rectifying tower, the rectifying tower is connected with a recovery product gas conveying pipe and a C4 and above hydrocarbon condensate discharge pipe, the pressure swing adsorption purification unit is connected with a refinery dry gas conveying pipe, the compressor compressed gas outlet is connected with a product gas external conveying pipe, and the recovery product gas conveying pipe is connected to the product gas external conveying pipe. The application can not only recover C2 and C3 components in condensate, but also reduce energy consumption.

A method and apparatus for desulfurizing and separating catalytic cracking light products. The method includes the following steps: 1) contacting the catalytic cracking light products with a desulfurizing adsorbent in an adsorptive desulfurization reaction unit in the presence of hydrogen for desulfurization, and optionally subjecting the desulfurized products to gas-liquid separation to obtain a desulfurized rich gas and a desulfurized crude gasoline. The catalytic cracking light products are overhead oil gas from a catalytic cracking fractionation tower or a rich gas and a crude gasoline from a catalytic cracking fractionation tower; and 2) separately sending the desulfurized rich gas and the desulfurized crude gasoline obtained in step 1) to a catalytic cracking absorption stabilization system for separation to obtain a desulfurized dry gas, a desulfurized liquefied gas, and a desulfurized stabilized gasoline. The method and apparatus are suitable for use in treating the catalytic cracking light products obtained from the catalytic cracking fractionation tower, and can produce a high yield of refined gasoline and a low octane loss.

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 invention belongs to the field of oil refining and chemical engineering, and relates to a method and a device for recovering light hydrocarbon by multistage absorption. Compared with the prior art, the method has the following advantages: an atmospheric and vacuum distillation unit and a hydrocracking unit are not required to be independently provided with an absorption stabilizing system, so that the problem of secondary separation of key components is reduced; an H2 / C1 coarse separation facility is arranged in front of the absorption tower, so that the H2 partial pressure in the raw material gas is reduced, the reduction of the circulating volume, the absorption pressure or the absorption temperature of a C4 absorbent is facilitated, and meanwhile, the size of the absorption tower is reduced; crude hydrocarbon subjected to desulfurization and mercaptan removal and crude hydrocarbon condensed by a cooler at an outlet of a third raw material gas compressor are sent to a first absorption section of the multi-stage absorption tower, C3-C5 components contained in the raw materials are used as absorbents, the amount of circulating C4 is reduced, and energy consumption is reduced; the multi-stage absorption tower is arranged, and the absorbent enters different positions of the multi-stage absorption tower according to different contents of C3 and C4 in the absorbent, so that the absorption effect is improved.

The application discloses a liquefied petroleum gas hydrodesulfurization method, which comprises the following steps: (1) carrying out gas fractionation on a liquefied petroleum gas raw material to obtain a C3 fraction and a C4 fraction; (2) contacting the C3 fraction and the C4 fraction with a hydrodesulfurization catalyst in liquid form respectively to carry out a hydrodesulfurization reaction, and hydrogenating sulfides in each fraction into hydrogen sulfide; wherein the C3 fraction is subjected to a high-temperature hydrodesulfurization reaction, and the C4 fraction is subjected to a low-temperature hydrodesulfurization reaction; and (3) carrying out alcohol amine absorption on hydrodesulfurization reaction effluents of the C3 fraction and the C4 fraction to remove hydrogen sulfide, and obtaining a refined liquefied petroleum gas product. The method matches the reaction fraction composition with the reaction process, accurately controls the reaction, and avoids the loss of olefins of the liquefied petroleum gas during the hydrodesulfurization.

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 process for recovery of olefins includes flashing at least a portion of an alkane feed stream to produce a flashed alkane feed stream, introducing the flashed alkane feed stream in a cold box, a fractionation system, or both as cooling medium, compressing and cooling a gaseous feed stream, separating a compressed and cooled feed stream into first residual vapor stream and first liquid residue stream, cooling the first residual vapor stream, separating a cooled first residual vapor stream into a second vapor residue stream and a second liquid residue stream, separating the first liquid residue stream into an overhead stream of the light removal column and a bottom stream of the light removal column, and fractionating at least a portion of the second liquid residue stream and the bottom stream of the light removal column to produce overhead vapor stream, liquid recycle stream, and bottom liquid stream.

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.