52results about "Hydrocarbon by dehydrogenation" patented technology

The disclosure provides an MTW framework-type molecular sieve with crystallites having an average size of 70nm or below. The sieve includes a structure-directing composition comprising 2-pyrrolidone or its N-alkyl derivative and a quaternary ammonium cation. A method for preparing the sieve and its use in producing olefins from alkanes are also described.

A process for producing ethylene and at least one of butanol and an alkyl tert-butyl ether from field butane includes separating the field butane into an n-butane stream and an isobutane stream; cracking the n-butane stream to obtain a cracked product stream comprising n-butane, 1- butene, 2-butene, butadienes, or a combination comprising at least one of the foregoing; and at least one of the following: (1) separating the cracked product stream to obtain a butane stream and a butene stream, and reacting the butene stream with water to obtain a fuel additive comprising butanol, and (2) dehydrogenating the isobutane stream in a dehydrogenation unit to form an isobutene stream and reacting the isobutene stream with an aliphatic alcohol to produce an alkyl tert-butyl ether.

A method for converting alkanes to alkenes may include contacting a feed stream comprising alkanes with a promoted dehydrogenation catalyst in a reaction zone in the presence of steam, the promoted dehydrogenation catalyst comprising: zirconia and a metal, wherein the metal is selected from the group consisting of chromium, gallium, iron, and combinations thereof, and silicon. The method further includes converting at least a portion of the alkanes to alkenes, thereby yielding a product stream comprising alkanes, alkenes, and hydrogen, wherein the promoted dehydrogenation catalyst does not require a gaseous oxidant in the feed steam or as a co-feed to catalyze conversion of alkanes to alkenes.

To provide systems and methods for processing gases.SOLUTION: The present invention provides a system for transforming a hydrocarbon-containing inflow gas into outflow gas products, where the system includes specified components.SELECTED DRAWING: None

An alkylation process including an upfront isomerization zone is described. 100% n-butane or field butanes can be converted into a blend of 60 wt% isobutane and 40 wt% n-butane in the isomerization zone. This blend can be used as the feed to all types of alkylation zones. It stabilizes the feed composition so that the dehydrogenation zone and alkylation zone always operate with the same feed.

The present invention relates to a process for the selective dehydrocyclization and aromatization of linear or branched hydrocarbons in the SAF range to aromatics in the SAF range.

This invention discloses a method for regenerating a noble metal catalyst for dehydrogenation of low-carbon alkanes, comprising the following steps: (1) treating the deactivated noble metal catalyst for dehydrogenation of low-carbon alkanes with an oxygen-supplying solvent under an inert gas atmosphere; (2) introducing carbon dioxide into the deactivated catalyst system after step (1) to obtain a regenerated catalyst. The method of this invention features low regeneration temperature, short regeneration time, complete carbonization, good dispersion of active components, avoids loss of alkali metal promoters, and the catalytic activity of the regenerated catalyst reaches the level of a fresh catalyst.

An integrated process and associated system for conversion of crude oil to value added petrochemicals. The process includes separating crude oil into light and heavy crude fractions and processing the heavy fraction in a solvent deasphalting unit and a delayed coker unit, and then providing the light fraction and selected effluents of the solvent deasphalting unit and the delayed coker unit to a hydrotreater. The process further includes separating the effluent of the hydrotreater to generate a C1 fraction passed to a methane cracker, a C2 fraction passed to an ethane steam cracker, a C3-C4 fraction passed to a dehydrogenation reactor, a hydrotreated light fraction passed to an aromatization unit, and a hydrotreated heavy fraction passed to a steam enhanced catalytic cracking unit. The process further includes separating effluents of the various unit operations into product streams including a BTX stream and a light olefin stream.

The invention discloses a hierarchical pore all-silicon molecular sieve encapsulated catalyst as well as a preparation method and application thereof. According to the invention, a hierarchical pore all-silicon molecular sieve is used as a carrier, and sub-nano active metal clusters are highly dispersed in all-silicon molecular sieve pore channels. According to the catalyst, a seed crystal auxiliary growth method is adopted, a hierarchical pore structure generated by surface squamous morphology has excellent mass transfer performance, the transmission rate of reactants and products can be remarkably enhanced, the accessibility and effective utilization rate of packaging active metal are improved, the catalytic efficiency is improved, and the inactivation rate is reduced. When the catalyst provided by the invention is applied to preparation of propylene through propane dehydrogenation, excellent propane catalytic activity and long-period stability are shown.

The invention relates to the field of catalysts, and discloses a molecular sieve based catalyst, a preparation method thereof and a propane dehydrogenation method. The catalyst comprises a molecular sieve, an active metal and an auxiliary metal, the active metal comprises Pt; the auxiliary metal comprises at least one of Zn, Sn, Ge, Ga and In; the molecular sieve is an MFI type molecular sieve; the micropore specific surface area of the catalyst is 200-440m < 2 > / g; the total specific surface area of the catalyst is 340-460 m < 2 > / g; the micropore volume of the catalyst is 0.05 to 0.2 cm < 3 > / g; the mesoporous pore volume of the catalyst is 0.02 to 0.2 cm < 3 > / g; the crystallinity of the catalyst is 94-98%; and the b-axis length of the catalyst is not less than 500nm. The catalyst is not easy to inactivate in a propane dehydrogenation reaction.

Provided herein are systems and methods for converting CO2 and a reducing gas, such as H2 or a hydrocarbon, into a mixture of alkanes and aromatics for use as aviation fuel using a reduction catalyst and an aromatic catalyst. The reduction catalyst and aromatic catalyst, and systems and methods using them, provide advantages over other methods in the art in terms of improved yield, catalyst stability, and lifetime.

The invention relates to the technical field of propane dehydrogenation, and discloses a platinum-tin-carbon catalyst and a preparation method and application thereof, the catalyst comprises a carbon carrier and an active metal component; wherein the active metal components comprise Pt and Sn, and based on the total weight of the platinum-tin-carbon catalyst, the content of Pt is 0.2-0.55 wt%; wherein the ratio of sp2 carbon to sp3 carbon on the surface of the carbon carrier is 0.6 to 1.3; wherein only two oxygen species, namely C-O and O = C-O, exist on the surface of the carbon carrier. The platinum-tin-carbon catalyst shows high propane conversion rate, high propylene generation rate and high stability in propane dehydrogenation reaction.

The application discloses a propane dehydrogenation catalyst, a preparation method and application, the propane dehydrogenation catalyst includes carrier and the Pt component, Sn component and alkali metal component supported on the carrier;The carrier is spherical activated carbon;The alkali metal component is selected from potassium and / or sodium. Wherein, the carrier is spherical activated carbon, the spherical activated carbon is 0.4-2.0mm spherical particle, the specific surface area of the spherical activated carbon is 500-2000m 2 / g, the pore volume is 0.55-1.5mL / g, has the micropore of 0.5-1.5nm, 4-10nm mesopore and 50-200nm macropore.The catalyst prepared by the application has higher catalytic activity, propylene selectivity and catalytic stability.

A process for producing monomers is disclosed. The process comprises hydrocracking a pyrolysis oil stream in a hydrocracking reactor over a hydrocracking catalyst in the presence of a hydrocracking hydrogen stream at hydrocracking conditions to open rings present in said pyrolysis oil stream to produce a hydrocracked effluent stream. The hydrocracked effluent stream is fractionating in a fractionation column to provide a naphtha stream. The naphtha stream is contacted with a NEP catalyst and hydrogen to produce a light paraffinic stream or with a reforming catalyst to produce an aromatics stream.

The invention discloses an oxygen permeation membrane in-situ regeneration system and a reaction method for a propane dehydrogenation (PDH) process. According to the method, an independent regenerator is arranged outside a dehydrogenation reactor, and a carbon deposition catalyst is circulated between the reactor and the regenerator through a catalyst circulating unit. The oxygen permeation membrane component is used for separating permeated oxygen from oxygen-containing gas flow and enabling the permeated oxygen to enter the regeneration area; the control unit adjusts the oxygen permeation flux, so that the gas-phase oxygen partial pressure of the regeneration area is kept at 0.5-2.5 kPa, the temperature control module keeps the temperature of the regeneration area at 550-650 DEG C, and mild and controllable regeneration of the deposited carbon is achieved. According to the system, a Pt / CeO2 selective oxidation catalyst layer can be selectively arranged, and regeneration end point judgment and intensity self-adaptive control can be carried out in combination with regenerated tail gas CO2 / CO or in-situ IR signals. Nitrogen dilution and hot-spot sintering risks are reduced, and safety and long-period operation capacity are improved.

The claimed solution relates to catalysts for the hydrocarbons dehydrogenation, and particularly relates to a novel catalyst having a structure that makes it possible to provide high olefin selectivity and a high yield of olefins in a dehydrogenation process. The aim of the present solution is to develop a catalyst structure that provides greater selectivity and a higher yield of olefins in hydrocarbons dehydrogenation processes. The effect of the present solution includes providing high catalytic activity and selectivity in hydrocarbons dehydrogenation processes, and expanding the range of products applicable in hydrocarbons dehydrogenation processes.

A process for regenerating and reducing a deactivated catalyst that can include heating the catalyst by contacting the catalyst with a combustion product to produce a precursor catalyst. The combustion product can be produced by combusting a mixture of fuel and an oxidant. The combustion product, prior to, during, or after contact with the catalyst, can include H2O at a concentration of greater than 2 mol% and, optionally, O2 at a concentration of less than 2 mol%. The amount of O2 in the combustion product can be maintained at the concentration of less than 2 mol% by controlling a molar ratio of the oxidant to the fuel. The process can also include contacting the precursor catalyst with an oxidative gas that includes no greater than 2 mol% of H2O to produce a regenerated catalyst and contacting the regenerated catalyst with a H2-containing gas to produce a regenerated and reduced catalyst.

The invention provides an anti-carbon composite metal oxide catalyst and a preparation method, a regeneration method and application thereof. The catalyst comprises a carrier and a composite metal oxide loaded on the carrier; the composite metal oxide is prepared from Fe2O3, K2O, MoO3, La2O3, MgO, Tm2O3, Cs2O and NiO. The anti-carbon-deposition composite metal oxide catalyst provided by the invention has the characteristics of strong anti-carbon-deposition capability, good dispersibility of active components and high catalytic activity, is simple in preparation process, is easy to regenerate after inactivation, and is suitable for industrial production of styrene through ethylbenzene dehydrogenation.

A method for manufacturing alpha-methylstyrene according to an exemplary embodiment of the present application comprises dehydrogenating cumene in a reactor under a catalyst to manufacture alpha-methylstyrene, wherein one or more of nitrogen (N2) and carbon dioxide (CO2) are added during the dehydrogenation reaction of cumene, and wherein the catalyst comprises a carrier; and a metal nitride-based catalyst component supported on the carrier.

Provided here are methods and systems for enhanced olefin production using separation and hydrocracking heavy hydrocarbons. One such method for producing olefins includes separating a paraffin feed stream containing substantially 2-methylpropane and n-butane to produce a 2-methylpropane-rich stream and a n-butane-rich stream, hydrocracking the 2-methylpropane-rich stream in a presence of hydrogen to produce a hydrocracked product stream containing substantially ethane and propane, and supplying the n-butane-rich stream and the hydrocracked product stream to a steam cracker, thereby to produce ethene and propene.

The present invention provides a light alkane dehydrogenation catalyst, and a preparation method and application thereof, and belongs to the technical field of petrochemical technology. The catalyst uses at least one of precious metals Pt, Pd, Ru and Rh as an active component, at least one of transition metals Ga, V, In, Sn, Mn, Ce, Fe and Ni as a promoter, and a modified zinc aluminate carrier as a carrier; the chemical composition of the modified zinc aluminate carrier is of the general formula ZnMxAlyO4, where x is 0.01-0.99, y is 0.01-1.99, and it satisfies x+y=2; M is selected from at least one of the rare earth elements La, Ce, Pr, Sm and Er. The catalyst prepared by such a modified zinc aluminate carrier has the characteristics of high propane conversion rate, high selectivity for product propylene, strong resistance to sintering, good stability, etc.

The disclosure concerns an alkane dehydrogenation process remarkable in that it comprises the steps of (a) providing a first stream comprising one or more alkanes; (b) providing a second stream comprising hydrogen; (c) mixing the first stream and the second stream so as to generate a feedstream; (d) providing at least one proton-conducting catalytic membrane, each proton-conducting catalytic membrane comprising an anode, an electrolyte layer disposed on top of the anode and a porous cathode disposed on top of the electrolyte layer; (e) feeding within the anode of said one or more proton-conducting catalytic membranes under alkane dehydrogenation conditions the feedstream generated at step (c); and (f) recovering a first effluent comprising at least one or more alkenes.

The present disclosure provides a method for evacuating a high temperature reactor requiring vacuum pressure during one or more steps of the reaction process, including directing a reduction gas stream from the reactor to a quench system in fluid communication with the reactor, the quench system comprising one or more enclosures wherein the reduction gas stream directly contacts a liquid cooling medium, wherein the liquid cooling medium is water; withdrawing a cooled gas stream from the quench system; and directing the cooled gas stream to a vacuum pump in fluid communication with the quench system and the reactor to reduce the pressure within the reactor to a vacuum pressure. A system for evacuating a high temperature reactor is also provided, including a high temperature reactor combined with a quench system and a vacuum pump as described above.

The invention relates to the technical field of dehydrogenation catalysts, in particular to an ultra-low-loading Ru-based monatomic catalyst, preparation and application of the ultra-low-loading Ru-based monatomic catalyst to propylene preparation through propane dehydrogenation, the ultra-low-loading Ru-based monatomic catalyst is a supported Ru-based catalyst, Ru serves as an active component, a carrier is P and N-doped carbon (PNC), the doping amount of P is 0.01-10 wt%, and the doping amount of N is 0.01-30 wt%; the content of Ru is 0.01-0.2 wt% of the total mass of the catalyst; ru is highly dispersed on the carrier in a monatomic form, Ru is co-coordinated with N and P species to form an active center, and the coordination number is 4. The catalyst can realize high-efficiency propylene preparation through propane dehydrogenation. The catalyst realizes 15% of propane conversion rate and 95% of propylene selectivity at 520 DEG C under the condition of only 0.07 wt% of Ru load, and the space time yield of propylene is as high as 791 mol C3H6mol Ru <-1 > h <-1 >.

An alkane dehydrogenation catalyst including a support; and on the support, an active layer including gallium oxide, aluminum oxide, cerium oxide, a Group 1 metal oxide, and a Group 8-11 metal oxide. The catalyst composition of the examples comprises oxides of gallium, cerium, potassium, platinum and aluminium.

The invention discloses a low-noble-metal-content supported catalyst as well as a preparation method and application thereof. The catalyst mainly comprises an all-silicon molecular sieve, a low-content noble metal Pt component and an auxiliary metal component, due to the high external specific surface area provided by the all-silicon molecular sieve, the dispersity of Pt can be remarkably improved; and the alloy structure that the active metal Pt is coated with the high-content auxiliary metal oxide is beneficial for inhibiting high-temperature migration and agglomeration of the active metal, and the catalytic stability is improved. When the catalyst is applied to propane dehydrogenation reaction, the catalyst shows excellent catalytic activity and stability, and the average propylene yield within 12 hours of reaction is 4 times that of high-content Pt under the same condition.

The invention discloses a cracking furnace and a cracking method, and belongs to the field of petroleum processing. The cracking furnace comprises a pipe section I and a pipe section II which are communicated; the pipe section I is provided with a heat exchange furnace pipe, a cracking raw material inlet and a gas outlet; the pipe section II is provided with a cracking furnace pipe, a first material inlet, a second material inlet, a first combustor and a second combustor; the cracking furnace pipe divides the cavity of the pipe section II into a first area close to the pipe section I and a second area far away from the pipe section I; a first material inlet of the first combustor is located in the first area; the second combustor and the second material inlet are located in the second area; according to the cracking furnace provided by the invention, the strong heat release characteristic of a complete oxidation reaction of a specific material is fully utilized, so that the temperature of high-temperature flue gas in the cracking furnace hearth meets the temperature required by the cracking reaction in the cracking furnace tube, the fuel consumption of the cracking furnace is reduced, and the economical efficiency of the cracking furnace is improved; and meanwhile, the combustion heat energy of the CO-containing material flow is efficiently utilized.

The invention relates to a method and a system for nuclear production of petrochemicals. Some such systems include a nuclear reactor that generates thermal energy; a dehydrogenation plant adapted to produce petrochemicals using some thermal energy; a power generation device adapted to generate electricity and produce steam using some thermal energy; an electric steam methane reforming furnace for producing hydrogen using the generated electric power; and a cracking reactor adapted to combust hydrogen. Some such processes include using thermal energy generated by nuclear energy in a dehydrogenation plant to add the thermal energy to a dehydrogenation process to produce petrochemicals; using heat energy generated by nuclear energy in a power generation device to generate electricity and produce steam; energizing an electric steam methane reforming (SMR)-based hydrogen plant with the generated power to produce hydrogen, and processing a hydrocarbon feed in a cracking reactor to produce petrochemicals.