39results about "Molecular sieve catalyst" 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.

Provided are (1) a method for converting ethanol, comprising contacting a raw material mixture containing ethylene and ethanol with a catalyst in an adiabatic reactor to obtain a reaction gas containing an olefin having 3 or more carbon atoms, (2) a method for converting ethanol, comprising contacting a raw material mixture containing methanol and ethanol with a catalyst in an adiabatic reactor to obtain a reaction gas containing an olefin having 3 or more carbon atoms, and (3) a method for converting ethanol, comprising: contacting a raw material mixture containing ethanol and ethylene with a catalyst in an adiabatic reactor to obtain a reaction gas containing an olefin having 3 or more carbon atoms; separating the reaction gas into fraction A mainly containing a hydrocarbon having 2 to 3 carbon atoms and fraction B mainly containing a hydrocarbon having 4 to 6 carbon atoms by a first distillation column; and recycling at least a portion of the fraction A as a portion of the raw material mixture to the reaction step.

The present invention relates to an improved porous solid catalyst (C) adapted for the conversion of methanol and derivatives thereof into low-molecular weight hydrocarbons, based on a zeolite, such as ZSM-5, and on inorganic oxide, such as ceria, in a preferable weight ratio of zeolite:inorganic oxide between 1:1 and 1:5. It further relates to a conversion process and to a system using such a catalyst.

This invention discloses a method for producing aromatic hydrocarbons by coupling conversion of carbon monoxide and polyolefin, and belongs to the technical field of conversion and reuse of polyolefin plastics. Carbon monoxide and polyolefin are used as reaction raw materials, and the catalyst is a dual-function catalyst consisting of a metal, a metal oxide, and a molecular sieve, and the conversion reaction is carried out under the action of the catalyst. Since carbon monoxide can be obtained from carbon resources such as coal, biomass, and natural gas, the reaction process not only enables the optimized use of carbon resources but also enables the recycling of polyolefin waste plastics, realizing high value-added utilization and producing high value-added aromatic hydrocarbon products. The reaction has very high product yield and product selectivity, with the yield of aromatic hydrocarbons reaching 50-80%, and the proportion of benzene, toluene, and xylene in the aromatic hydrocarbons being 60% or more. Furthermore, the catalyst can be reused after simple regeneration treatment, and as a new technology for the comprehensive utilization of polyolefin waste plastics and the utilization of carbon monoxide, it has high applicability.

The present invention provides a catalyst composition comprising rare earth exchanged USY zeolite (REUSY); pentasil zeolite; phosphorous compound; clay, silica, alumina, and spinel to enhance the catalytic activity and selectivity for light olefins in FCC operation conditions. The present invention also provides a process for the preparation of Light olefin enhancing catalyst composition with high propylene yield and coke selectivity.

Processes for producing mono-methyl alkylbenzenes from natural oils are described. The processes includes a linear selective cracking process to crack C14+ chains into C9 to C14 chains which are useful for making linear alkylbenzene for use in detergents and a hydroisomerization step to produce paraffins with mono-methyl branching which can be reacted with benzene to form the mono-methyl alkyl benzenes.

A method for producing an olefin-containing composition includes a step of decomposing plastic in the presence of a zeolite to produce an olefin-containing composition including an olefin with 2 to 5 carbon atoms, wherein the zeolite is at least one selected from the group consisting of a beta zeolite including Rb+ and a mordenite zeolite including Rb+.

Provided is a continuous process for converting waste plastics into recycling for polypropylene polymerization. This process includes a step of selecting waste plastics containing polyethylene and / or polypropylene, and a step of preparing a blend of the biofeedstock and the selected plastics. The amount of plastic in the blend constitutes 20 wt% or less of the blend. The blend is passed through an FCC unit. A liquefied petroleum gas LPG olefin / paraffin mixture and naphtha are recovered from the FCC unit and can be used in the production of polypropylene.

The present invention relates to a process for dehydrating an alcohol feedstock comprising: Vaporizing said alcohol feedstock mixed with a gas stream; Introducing said alcohol feedstock, vaporized and mixed with said gas stream, into a set of at least two adiabatic reactors; Separating the effluent from the last adiabatic reactor of step b) into an effluent comprising the olefin(s) corresponding to the dehydration of the feedstock and an aqueous effluent; Compressing the effluent comprising the olefin(s) from step c) in at least one compressor; Dividing the compressed effluent from step d) into two fractions; and then Recycling, in part or in whole, a first fraction of the compressed effluent upstream of step a) to constitute said gas stream. Figure 2 to be published

The application relates to the field of molecular sieve preparation, and discloses a SAPO-34 molecular sieve, a preparation method and application thereof. The SAPO-34 molecular sieve has a relative amount of external surface acid sites of less than 50%. The SAPO-34 molecular sieve provided by the application has a relatively small relative amount of external surface acid sites, is applied to a reaction of methanol to olefins, and has the characteristics of high selectivity of low-carbon olefins.

This invention discloses a method for producing aromatic hydrocarbons by coupling conversion of carbon dioxide and polyolefin, and belongs to the technical field of conversion and reuse of polyolefin plastics. The catalyst is a dual-function catalyst consisting of a metal, a metal oxide, and a molecular sieve, and the conversion reaction is carried out under the action of the catalyst using carbon dioxide and polyolefin as reaction raw materials. The reaction process not only enables the resource utilization of carbon dioxide, but also enables the recycling of polyolefin plastics, realizing high value-added utilization and producing high value-added aromatic hydrocarbon products. The reaction has very high product yield and product selectivity, with the yield of aromatic hydrocarbons reaching 50-80%, and the proportion of benzene, toluene, and xylene in the aromatic hydrocarbons being 60% or more. Furthermore, the catalyst can be reused after simple regeneration treatment, and it has high applicability as a new technology for the comprehensive utilization of polyolefin waste plastics and the reduction of carbon dioxide emissions.

The disclosure provides an MTW framework-type molecular sieve with crystallites having an average size of 70 nm 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.

The present application relates to the technical field of molecular sieve preparation, and discloses a rare earth modified molecular sieve and a preparation method and application thereof. The rare earth modified molecular sieve comprises a molecular sieve and a rare earth element loaded on the molecular sieve, the E value of the rare earth modified molecular sieve is greater than 10%, and the C value is 0.3-2.8, wherein the E value represents the mass fraction of the rare earth element in the rare earth modified molecular sieve in terms of an oxide, and the C value represents the ratio of the acid amount of B acid to L acid of the rare earth modified molecular sieve. The modified molecular sieve provided by the present application is loaded with a large content of rare earth elements, and the distribution characteristics of B acid and L acid of the molecular sieve are adjusted, which is conducive to improving the selectivity of linear alkylbenzene, improving the alkylation reaction activity and the linearity of the product, and the linearity of the alkylation product can reach more than 94%, and the isomerization olefin selectivity is less than 1%.

The present disclosure relates to a catalyst composition comprising a metal catalyst chemically interacted with a zeolite comprising at least one zeolite framework selected from the group of clusters consisting of MTW framework cluster. The disclosure also relates to a catalyst composition comprising at least one alkaline-earth metal catalyst chemically interacted with a zeolite comprising at least one zeolite framework. The catalyst compositions described are useful for catalytic oxidative dehydrogenation of hydrocarbons.

The application discloses a kind of spherical SSZ-13 molecular sieve and its preparation method and application.The spherical SSZ-13 molecular sieve is aggregated into spherical morphology by nanocrystalline grain, size is 0.2~5.0 μm, SiO2 / Al2O3 molar ratio is 29.0~80.0, wherein the size of nanocrystalline grain that constitutes spherical particle is 30~100 nm.The spherical SSZ-13 molecular sieve of the application has special excellent performance as methanol conversion catalyst.

The process upgrades a low value heavy aromatics stream into a high value BTX precursor stream. It treats the C9 to C 12 Naphthalene molecules in the heavy aromatics stream of the aromatics are converted to BTX precursors by partially hydrogenating one of the aromatic rings prior to the transalkylation reactor and subsequently ring opening the saturated ring to form a single aromatic ring. The remaining C 11 Monaromatics to achieve an overall increased BTX yield.

The present invention belongs to the field of fluid catalytic cracking (FCC) processes for the production of fuels with fully renewable content, more specifically in the production of high octane gasoline (RON above 92 and / or MON above 83) and middle distillates. More specifically, the present invention relates to the co-processing of bio-oil and grease streams in the presence of an intermediate pore size zeolite catalyst, to produce more and better gasoline, reducing the amount of heavy fractions of low commercial value.

The invention refers to a process for the monoalkylation of aromatic compounds, comprising the step of contacting an aromatic hydrocarbon with an alkylating agent in the presence of a catalyst, wherein said catalyst comprises a FAU-type zeolite exchanged with one or more alkaline or alkaline earth metal cations comprising potassium, cesium and / or calcium and which has a total SiO2 / AI2O3 mole ratio between 10:1 and 80:1.

A solid acid catalyst for producing long-chain alkyl aromatic hydrocarbons, characterized in that the solid acid catalyst is loaded with a noble metal and a non-noble metal, the noble metal being 0.03-0.06% and the non-noble metal being 5-17% based on the weight of the solid acid catalyst.

The present invention relates to a process for converting an oxide to a hydrocarbon in the presence of a sorbent material having the ability to adsorb water. Further, the present invention relates to a fluidized bed reactor or a fixed bed reactor for converting an oxide to a hydrocarbon, comprising a catalyst and a sorbent material having the ability to adsorb water. The present invention also relates to the use of a sorbent material having the ability to adsorb water for increasing the conversion of an oxide to a hydrocarbon.

The present application relates to C9 and above heavy aromatic hydrocarbon processing technical field, it is a kind of production mesitylene method and device, the former is carried out according to the following method: under catalyst, C9 and above heavy aromatic hydrocarbon and hydrogen are carried out dealkylation isomerization reaction, then liquid phase product is separated by dehydrogenation, after three-stage rectification, mesitylene is obtained.The present application uses C9 and above heavy aromatic hydrocarbon to carry out dealkylation isomerization process, eliminates the interference of methyl ethyl benzene to mesitylene separation, maximizes the production of mesitylene, methyl ethyl benzene content <0.5%, the yield of mesitylene is greater than 25%, its process is simple, the yield of mesitylene is high, the production cost is low, compared with the traditional production BTX or blending gasoline route, the method for producing mesitylene of the present application realizes the maximization of C9 and above heavy aromatic hydrocarbon resources.

The present invention is a method for treating a catalyst comprising at least one ZSM-5 type aluminosilicate zeolite and a binder containing silicon oxide, said treatment comprising a steam treatment of the catalyst, said steam treatment being carried out on the catalyst in the form of a catalyst bed of catalyst particles, disposed in a reactor for catalytic conversion of hydrocarbons, with a steam treatment gas stream containing steam passing through said bed, at a temperature of at least 150 °C and at a pressure of up to 3×10 6 Pa.

Processes for converting one or more C1-C5 alcohols to one or more C2-C5 olefins at a time on stream that is greater than a time on stream of a comparable process are provided. In one exemplary aspect, the process can be a single stage process for the direct conversion of C1-C5 alcohols to olefinic mixtures (e.g., C2-C5) carried out in a reactor using one or more catalysts, where an amount of water within the input stream is reduced and / or pressure within the reactor is increased at different time periods when an amount of an olefin present in the output stream is equal to or less than a target amount. Systems for carrying out these processes are also provided.

Subject of the invention is a method for producing fuel which comprises C8+ aromatics and C8+ hydrocarbons, the method comprising the steps: (i) converting a feed mixture comprising CO2 with H2 into a mixture comprising CO, C6+ aromatics and unsaturated C2-C6 hydrocarbons, wherein the CO2 is at least partially converted into methanol using a metal oxide-based catalyst and wherein the methanol is at least partially converted into C6+ aromatics using a zeolite-based catalyst, wherein said unsaturated C2-C6 hydrocarbons are subsequently at least partially converted into unsaturated C8+ hydrocarbons by oligomerisation, and (ii) alkylating C6+ aromatics from step (i) at least partially with unsaturated C2-C6 hydrocarbons from step (i) into C8+ aromatics using an acid catalyst different from the zeolite-based catalyst used in step (i).

A metal-modified molecular sieve has a silica-alumina molecular sieve and a modifying metal selected from an alkaline earth metal, a Group IIIB metal, a Group IIIA metal, or combinations thereof. At least a portion of the modifying metal exists in the form of an extra-framework compensation cation of the molecular sieve, and the modifying metal as element represents from 8 wt. % to 30 wt. % based on the total amount of the metal-modified molecular sieve. In the metal-modified molecular sieve, the ratio of the weight percentage of the surface-layer modifying metal measured by X-ray photoelectron spectroscopy to the weight percentage of the bulk modifying metal measured by X-ray fluorescence does not exceed 1.45, calculated on the basis of the weight percentage of the element. The molecular sieve can be used in the preparation of a long-chain hydrocarbon-based aromatic compound, inhibiting the skeletal isomerization of the target long-chain hydrocarbon-based product.

A method for producing an olefin-containing composition includes a step of decomposing plastic in the presence of a zeolite to produce an olefin-containing composition including an olefin with 2 to 5 carbon atoms, wherein the zeolite is an MFI zeolite including Rb+.

The present invention relates to a catalyst comprising a zeolite having at least one series of channels with an aperture of at least 10 oxygen atoms (10MR) and a binder, wherein: - the catalyst comprises phosphorus and an AlPO₄ structure, as determined by a signal between 35 and 45 ppm on a spectrum obtained by 27Al NMR analysis of the catalyst; - the pore volume (V(4-900)) of the catalyst pores with a size between 3.6 and 900 nm is greater than or equal to 0.25 ml / g; - the pore volume (V(30-310)) of the catalyst pores with a size between 30 and 310 nm is less than or equal to 0.080 ml / g. The present invention also relates to the use of said catalyst in a process for the dehydration of an alcohol and a process for the production of ethylene from a feedstock comprising ethanol using said catalyst.

A variety of methods are disclosed, including, in one embodiment, a method including: introducing a feed comprising an alcohol and an activator into a reactor comprising a solid acid catalyst; and contacting the alcohol and the activator in the presence of the solid acid catalyst under conditions effective to convert at least a portion of the alcohol and the activator to produce a product stream comprising C6-C16 olefins.

This disclosure relates to an aluminogermanosilicate molecular sieve, designated as SSZ-124, methods for making the same, and uses thereof.

Processes are disclosed for the production of liquefied petroleum gas (LPG) hydrocarbons, utilizing both alcohol (e.g., methanol) synthesis and in situ dehydration of the alcohol to hydrocarbons, and particularly propane and / or butane. Operational adjustments and / or variations, involving activation of LPG synthesis catalyst systems at relatively high temperatures, followed by initial operation at relatively low temperatures, surprisingly lead to improvements in the stability of such catalyst systems. These improvements are often in conjunction with other benefits, for example greater selectivity and / or per-pass yield, with such improvements and benefits resulting from the ability to operate at reduced temperatures. Problems typically encountered in the art due to catalyst instability, such as the need for frequent replacement and / or regeneration, are thereby potentially reduced or even eliminated.