821results about "Molecular sieve catalyst" patented technology

A process for producing isooctane by introducing a butane feed stream (containing n-butane, i-butane) and hydrogen into a catalytic hydrogenolysis reactor to produce a hydrogenolysis product stream; separating the hydrogenolysis product stream into a butane stream (i-butane, optionally n-butane); feeding the butane stream to a catalytic dehydrogenation reactor to produce a dehydrogenation product stream comprising saturated and unsaturated four-carbon hydrocarbons; and feeding the dehydrogenation product stream to an oligomerization unit to produce isooctene and dehydrogenating the isooctene to produce isooctane.

The invention discloses a catalyst for synthesizing low-carbon olefin through CO2 hydrogenation reaction as well as preparation and application of the catalyst. The catalyst comprises an active component A and a core-shell structure B (at) C, wherein the active component A is a metal oxide with catalytic activity for synthesizing low-carbon olefin through a CO2 hydrogenation reaction; in the core-shell structure B (at) C, B is an SAPO molecular sieve, and C is selected from one or more of B2O3, SiO2, Al2O3, TiO2, ZrO2, kaolin and montmorillonite. The catalyst is used for synthesizing low-carbon olefin through CO2 hydrogenation, and can obviously improve the CO2 conversion efficiency and reduce the CO selectivity.

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.

Transalkylation processes using catalysts comprising three dimensional 12 membered ring zeolites with a combination of small and large pores are described. These catalysts have increased conversion of alkylphenols to phenol, cresols, and alkylbenzenes from coal-derived liquid streams compared to catalysts consisting of HZSM-5 zeolite.

The invention discloses an MWW type molecular sieve as well as a preparation method and application thereof. The weight ratio of framework aluminum (Al [F]) to non-framework aluminum (Al [EF]) of the molecular sieve is (5.0-16.0): 1. The invention provides a novel MWW type molecular sieve. The catalyst prepared by adopting the molecular sieve disclosed by the invention is applied to a reaction for preparing cyclohexylbenzene by transalkylation of polycyclohexylbenzene and benzene, and the conversion rate of the polycyclohexylbenzene and the selectivity of a cyclohexylbenzene product can be improved.

A process for separating fillers from catalysts and gases in plastics in a fluidized bed catalytic pyrolysis process is described that converts waste plastics, polymers, and other waste materials to useful chemicals and fuel products, such as aromatics such as paraffins, olefins, and BTX.

The invention discloses a method for preparing 1, 3-butadiene, and the method comprises the following steps: enabling a raw material containing gamma-valerolactone to be in contact and react with a catalyst to obtain the 1, 3-butadiene, the catalyst is a hydrogen type molecular sieve with a ten-membered ring topological structure, and the typical topological structure types of the catalyst comprise FER, TON, MTT, EUO, * MRE, MEL and MWW. In a fixed bed reactor, gamma-valerolactone is taken as a raw material and passes through the reactor from top to bottom. The target product 1, 3-butadiene can be efficiently prepared under the condition of 300-450 DEG C by using the catalyst.

A process for preparing middle distillates from an olefinic feedstock, bya) oligomerization fed with the olefinic feedstock, a first recycle and a second recycle, and operated in the presence of at least one oligomerization catalyst, to produce a reaction effluent containing dimers, trimers and oligomers;b) fractionating the reaction effluent into:a light fraction containing at least part of the unconverted olefinic feedstock;an intermediate fraction containing at least part of the dimers and trimers; anda heavy fraction containing the oligomers;c) recycling by the preparation of a first recycle containing at least part of the light fraction; and a second recycle containing at least part of the intermediate fraction; and transfer of the first recycle and the second recycle to step a);d) hydrogenating at least part of the heavy fraction.

An embodiment of a method for producing a cyclic compound of the present invention includes a step of causing a decarboxylation reaction in a cyclic carboxylic acid compound by subjecting a starting material containing the cyclic carboxylic acid compound to a heat treatment of heating under a catalyst to obtain a cyclic compound, in which the catalyst includes zeolite formed of an aluminum / silicon-containing composite oxide, and in which the zeolite has an SiO2 / Al2O3 ratio of 7 to 500. In addition, another embodiment of the method for producing a cyclic compound of the present invention includes a step of causing a decarboxylation reaction in a cyclic carboxylic acid compound by subjecting a starting material containing the cyclic carboxylic acid compound to a heat treatment of heating in the presence of a non-solid acid to obtain a cyclic compound.

A hydrogenation-acid catalysis bifunctional catalyst, based on the mass of the catalyst, contains 80-99.8% of a silica-alumina molecular sieve component, 0.2-2% of a metal component with hydrogenation activity supported on the molecular sieve, and 0-20% of a hydrocarbyl modifying component. The hydrogenation active metal is selected from ruthenium, platinum, palladium, copper, nickel, or a combination thereof. The hydrocarbyl modifying component is a C1-20 hydrocarbyl. The catalyst has dual functions of hydrogenation and acid catalysis, and is suitable for benzene hydroalkylation reaction and alkane hydroisomerization reaction. It can be used in the benzene hydroalkylation to produce cyclohexylbenzene with high benzene conversion rate, high product selectivity, and less by-product cyclohexane.

Disclosed is a method for producing an olefin-containing composition, the method being characterized by including a step for decomposing a plastic in the presence of zeolite so as to produce an olefin-containing composition that contains an olefin having 2 to 5 carbon atoms. This method for producing an olefin-containing composition is also characterized in that the zeolite is at least one selected from the group consisting of a beta type zeolite containing Rb+ and a mordenite type zeolite containing Rb+.

The invention provides a catalyst for catalyzing benzene to prepare cyclohexylbenzene as well as a preparation method and application thereof, the catalyst comprises copper wire light zeolite and active metal loaded in the copper wire light zeolite, and the active metal comprises a nickel element; and the nickel element accounts for 1-7% of the mass of the catalyst. The catalyst provided by the invention takes nickel as an active metal, and the dispersity of the metal nickel can be improved due to the existence of a copper element in the copper wire light zeolite molecular sieve, so that the catalytic activity of the catalyst can be improved, and the conversion rate of benzene and the selectivity of cyclohexylbenzene can be improved when the catalyst is used for catalyzing a hydroalkylation reaction of benzene to generate cyclohexylbenzene.

The present invention provides an integrated plasma catalytic system for biogas conversion comprising a plasma treated mesoporous or microporous catalyst and a plasma source for converting biogas containing methane and carbon dioxide to liquid oxygenates rich in methanol or acetic acid. Biogas from different solid wastes can be converted into liquid oxygenates including methanol and acetic acid under normal temperature and pressure conditions.

The method is for producing para-xylene using, as a main raw material, a mixed gas of carbon dioxide or carbon monoxide or both thereof and hydrogen. The method including: a reaction step of bringing a raw material mixed gas including the mixed gas into contact with a reaction catalyst under high temperature and high pressure to cause a reaction, to thereby obtain a product gas mixture containing para-xylene; a separation step of cooling the product gas mixture obtained in the reaction step to condense a high boiling point component, to thereby separate the product gas mixture into a water phase containing a water-soluble component, an oil phase containing a xylene mixture, and a gas phase containing an unreacted gas; and a circulation step of mixing at least part of the gas phase having been separated in the separation step into the raw material mixed gas.

The invention discloses a catalyst for preparing low-carbon olefin through direct hydrogenation of CO-CO2 mixed gas as well as preparation and application of the catalyst. The catalyst comprises a metal oxide and a modified SAPO molecular sieve, wherein the metal oxide has catalytic activity on preparation of low-carbon olefin by direct hydrogenation of a CO-CO2 mixed gas; the modified SAPO molecular sieve is an SAPO coated AlPO core-shell molecular sieve. When the catalyst disclosed by the invention is used for preparing low-carbon olefin through direct hydrogenation of CO-CO2 mixed gas, olefin selectivity is maintained, and meanwhile, the catalyst has relatively high CO conversion rate and relatively low CO2 selectivity.

A method of converting a polymer including contacting a catalyst with a low-density polyethylene polymer to form a mixture and heating the mixture to a temperature of 200 degrees Celsius (° C.) to 600° C. in a microwave reactor to form a product. The catalyst includes an HZSM-5 zeolite, and 1 weight percent (wt. %) to 10 wt. % gallium and 0.1% to 5 wt. % copper, based on the total weight of the catalyst.

The invention discloses a ball-flower-like mordenite and a preparation method and application thereof, the ball-flower-like mordenite is a self-assembled aggregate of a plurality of sheet-shaped mordenite, the plurality of sheet-shaped mordenite are vertically crossed and gathered with one another to perform self-assembly, and the self-assembled aggregate is a spherical-flower-like mordenite. A 001 crystal face corresponding to a 12-membered pore channel of the flaky mordenite is exposed outside. The problem is well solved by utilizing the full exposure degree of a nanosheet cross structure to effective orifices, and the catalyst is used for the reaction for producing light aromatic hydrocarbon by converting polycyclic aromatic hydrocarbon, has the advantages of high reaction activity and high selectivity, and can be used for industrial production of aromatic hydrocarbon conversion.

Provided is a method for producing an olefin-containing composition, the method comprising a step for producing an olefin-containing composition containing an olefin having 2 to 5 carbon atoms by decomposing a plastic in the presence of zeolite, wherein the zeolite is an MFI-type zeolite containing Rb+.

The invention relates to a method for preparing 2, 6-dichlorotoluene with high selectivity, which comprises the following steps: (1) reacting toluene with olefin in the presence of a catalyst Cat1 to generate 3, 5-dialkyl toluene; (2) reacting the 3, 5-dialkyl toluene with chlorine in the presence of a catalyst Cat2 and a catalytic promoter to generate 2, 6-dichloro-3, 5-dialkyl toluene; and (3) the 2, 6-dichloro-3, 5-dialkyl toluene is subjected to a dealkylation reaction in the presence of a catalyst Cat3 to generate 2, 6-dichlorotoluene and olefin, and the olefin generated in the step (3) is the same as the olefin used in the step (1). The conversion rate of the reaction in each step is up to 100%, the selectivity exceeds 90%, the selectivity of the final target product 2, 6-dichlorotoluene reaches 90% or above, and the total yield exceeds 90%. The olefin obtained in the step (3) can be recycled.

The present invention relates to a catalyst for light olefins production from catalytic cracking of hydrocarbon having 4 to 7 carbon atoms, wherein said catalyst has core-shell structure comprising zeolite core selected from ferrierite, ZSM-5, or mixture thereof, and silicalite shell having MFI structure, and said catalyst has the following characteristics:a) the weight ratio of shell to core greater than 0 but less than 4;b) the mole ratio of silica to alumina (SiO2 / Al2O3) from 60 to 550;c) the hierarchical pores comprising micropores having pore size in the range of 0.1 to 2 nm, mesopores having pore size in the range of 2 to 50 nm, and macropores having pore size greater than 50 nm, wherein the proportion of volume of mesopores and macropores to the total pore volume is in the range from 0.35 to 0.90, and said mesopores comprise pores having pore size from 2 to 5 nm, wherein the proportion of volume of pores having pore size from 2 to 5 nm to the total pore volume is in the range from 0.08 to 0.30.The catalyst according to the invention provides high conversion of the reactant and especially high selectivity to light olefins. Moreover, this invention also relates to the process of light olefins production by using the catalyst thereof.

A catalytic cracking aid for improving the octane number of gasoline and a preparation method thereof. The catalytic cracking aid is composed of MFI structure molecular sieve, clay, pseudo-boehmite, phosphorus compound, binder, modified metal compound, etc. The catalytic cracking aid for improving the octane number of gasoline is obtained by the following preparation method: the MFI structure molecular sieve is pre-treated with alkali; before the pseudo-boehmite is acidified, the molecular sieve is added; after the acidified colloid is homogenized, it is directly spray-dried, roasted, and washed with water to obtain the catalytic cracking aid for improving the octane number of gasoline. The catalytic cracking aid disclosed in the present invention has a simple preparation process, a high solid content of the colloid slurry, and can be used in the catalytic cracking process to effectively improve the octane number of gasoline, with a small increase in liquefied gas and an increased propylene yield.

The venturi-type scrubber may be used in conjunction with the removal of solids and quench gas-phase reaction products from the gas-phase reaction products. A method can include: providing a reaction product comprising a hydrocarbon gas and a solid; introducing the reaction product into a venturi type scrubber; introducing a scrubbing fluid into the venturi-type scrubber, wherein the scrubbing fluid is at a lower temperature than the reaction product; generating, by the venturi scrubber, a heterogeneous product comprising a scrubbed reaction product and a waste scrubbing fluid, the scrubbed reaction product comprising the hydrocarbon gas, and the waste scrubbing fluid comprising the scrubbing fluid and the solids; and separating the hydrocarbon gas from the multiphase fluid. A system may include a reactor; a venturi-type scrubber having a first inlet fluidly connected to the reactor and a second inlet configured to receive a scrubbing fluid; and a separation column configured to receive a multiphase stream from the venturi scrubber after solids are removed.

Disclosed is a process for producing a jet fuel, comprising a step of converting an alcohol stream in a fluidized bed, a jet fuel and a plant associated with said process. The process involves the following steps:(a) converting a C1 to C6 alcohol stream to produce a mixture containing paraffins, olefins, aromatics, and water;(b) separating water from the mixture;(c) oligomerizing olefins; and(d) alkylating aromatics from the mixture;(e) forming a stream of hydrocarbons to be hydrogenated;(f) hydrogenating the stream of hydrocarbons to be hydrogenated;(g) recovering at least one jet fuel fraction from the hydrogenated hydrocarbon stream.Conversion step (a) is carried out in a reaction zone comprising at least one fluidized catalytic bed.In the mixture of paraffins, olefins, aromatics and water produced in conversion step (a), the ratio of the mass of C3+ olefins to the total mass of olefins is greater than or equal to 0.8.

The present disclosure provides a process for preparing 5-chloro-2, 3-dihydro-1H-inden-1-one and the 5-chloro-2, 3-dihydro-1H-inden-1-one prepared by the process. The present disclosure also provides a process for preparing Indoxacarb and the Indoxacarb prepared by the process.

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 dimerizing and oligomerizing olefins to distillate fuels which utilizes a solid acid catalyst for ethylene oligomerization in a first stage and a metal catalyst for further oligomerization in a second stage. Distillate fuels can be produced from the process. Oligomerized olefins may be recycled to the first stage oligomerization reaction to ensure sufficient oligomerization of smaller olefins.

This invention relates to the field of molecular sieves, specifically to a P-modified metal-doped MWW molecular sieve, its preparation method, and its applications. In this molecular sieve, A... Pδ‑7 / A P ≥50%, A Pδ‑7 represent 31 The peak area of ​​the P species signal peak at the terminal group with a P chemical shift of -7ppm ± 15ppm in the P MAS NMR spectrum, A P It represents 31 The peak area of ​​the total signal peak in the pMAS NMR spectrum. The molecular sieve of this invention has high activity, selectivity, and stability, and excellent resistance to carbon deposition.

A fluidized bed device for coupling naphtha and methanol to prepare aromatics and co-produce olefins and its application method are provided. By using the device, under the action of a catalyst, naphtha reacts with methanol to generate product gas containing aromatics and light olefins as main components. The method can efficiently and selectively convert linear and branched aliphatic hydrocarbons into aromatics, while also increasing p-xylene production through aromatic methylation reactions, with the p-xylene content in the xylene mixture exceeding 75 wt %. The fluidized bed reactor achieves increased p-xylene production by controlling the progression of cascade reactions (naphtha→benzene / toluene→p-xylene). Additionally, it utilizes the methylation reaction of benzene / toluene with methanol to provide in-situ heat for the coupled naphtha-methanol aromatization process, thereby achieving autothermal balance.

Processes for converting one or more C1-C5 linear or branched alcohols to one or more C2-C5 olefins are provided. In one exemplary embodiment, 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 a catalyst that includes zeolite doped with boron and phosphor. Systems for carrying out these processes are also provided.

An integrated catalyst can be used in an olefin disproportionation reaction. The integrated catalyst contains a plurality of different integrated active phases. The relative positions among different active phases remain substantially unchanged during the olefin disproportionation reaction. The effective distance between respective bisecting planes of two adjacent different active phases is 0.5-5 mm, preferably 1-3 mm.