708results about "Catalysts" patented technology

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 relates to a process for the production of ethylene by oxidative dehydrogenation (ODH) of ethane, comprising: a) supplying ethane and oxygen to a first ODH zone which is formed by multiple reactor tubes containing a mixed metal oxide ODH catalyst bed; b) contacting the ethane and oxygen with the catalyst resulting in multiple effluent streams, wherein the multiple reactor tubes are cooled by a coolant; c) mixing at least a portion of the multiple effluent streams from step b) resulting in a mixture comprising ethylene, unconverted ethane and unconverted oxygen; d) supplying at least a portion of the mixture from step c) to a second ODH zone containing a mixed metal oxide ODH catalyst bed; e) contacting at least a portion of the mixture from step c) with the catalyst in the second ODH zone resulting in a stream comprising ethylene and unconverted ethane.

A catalyst and a method for producing the catalyst are provided. An exemplary catalyst is of the formula: Mo a V b Bi c M d O x This formula includes: In this formula, M is Ta or Nb, a is 1.0, b is 0.01 to 0.5, c is 0.005 to 0.2, d is 0.005 to 0.1, and x is the number of oxygen atoms required to make the catalyst electrically neutral. The values ​​of a, b, c, and d are determined based on the amount of each starting material used to form the catalyst. The catalysts provided herein may be suitable as catalysts in oxidative dehydrogenation reactions, such as the oxidative dehydrogenation of ethane.

Disclosed herein is a method for converting ethanol to 1,3-butadiene, wherein the method utilizes H2 produced during a first step of the method for subsequent conversions involved in the method. In particular aspects, H2 produced from converting ethanol to acetaldehyde is used to promote the conversion of the acetaldehyde to 1,3-butadiene. The H2 promotes enhanced catalyst stability, as well as enhanced selectivity and yields of the 1,3-butadiene product. In particular aspects, the method comprises two steps to produce the 1,3-butadiene from the ethanol and H2 produced from a first step facilitates enhanced selectivities and yields for the second step.

Systems and methods of producing 1-hexene are disclosed. The methods include oligomerizing ethylene to produce 1-hexene in a reactor unit, which involves flowing a first solvent system into the reactor unit, the first solvent system adapted to improve selectivity of 1-hexene in the oligomerizing of the ethylene. The methods can include flowing part of a second solvent system into the reactor unit under washing mode, the second solvent system adapted to dissolve by-products in the reactor unit being washed. The methods can include flowing part of a second solvent system into the catalyst preparation unit, the second solvent system adapted to dissolve catalysts in the catalyst preparation step. The systems can include a reactor, a wax / polymer removal unit, and at least two C6 distillation columns in series for producing 1-hexene.

Provided is a method for producing a cyclic olefin compound, including a step of producing a cyclic olefin compound by acting a divalent nickel complex represented by General Formula (1) to decarbonylate and decarboxylate an alicyclic dicarboxylic acid anhydride, in which the divalent nickel complex includes at least one specific anionic ligand Y.         Ni(Y)m(L)n     (1) (here, Ni is divalent nickel, Y is an anionic monodentate or polydentate ligand and has at least one Ni-E covalent bond, E is a heteroatom or a π-bonding group, m is 1 or 2, L is a neutral ligand, and n is a real number of 0 to 6)

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.

This invention relates to a catalytically active or activatable mixture for use in a chemical reactor, comprising: (i) a shaped catalyst body containing a catalytically active or activatable material, and (ii) a conductor, wherein the shaped catalyst body has a characteristic diameter d. cat With the diameter d of these conductors con The ratio between (d) cat / d con The value is in the range of 1.5 to 3, and these shaped catalyst bodies have a characteristic diameter d in the range of 1 mm to 50 mm. cat Furthermore, the diameter of the unformed conductor is the average diameter determined by sieving according to DIN 66165, and the characteristic diameters of the formed catalyst body and the formed conductor are defined as the diameter d of the circumscribed sphere surrounding the formed body. css The sphericity Ψ of the convex hull of the molded body ch The product of the two. The invention further relates to a method for preparing the catalytically active or activatable mixture, the use of the catalytically active or activatable mixture in a chemical reactor as part of or as a directly electrically heated catalyst bed, and a chemical reactor for carrying out a chemical reaction, the chemical reactor containing or comprising the catalytically active or activatable mixture. The invention further relates to a method for carrying out a chemical reaction catalyzed by a shaped catalyst body of the catalytically active or activatable mixture.

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.

The conversion of nootkatol to nootkaten in the terpene blend is mitigated or prevented by substantially or completely separating the nootkatol, such as α-nootkatol, from compounds present in the terpene blend that catalyze the chemical reaction of nootkatol to nootkaten, and / or by neutralizing at least a portion of the compounds present in the terpene blend that catalyze the chemical reaction of nootkatol to nootkaten. Also disclosed are methods of preparing the terpene blend, the terpene blend, flavor compositions containing the terpene blend, beverages and foodstuffs containing the flavor compositions, fragrance compositions containing the terpene blend, and fragranced products containing the fragrance compositions.

A method of selectively producing oligomers can include contacting at least one antifouling agent with a first amount of at least one aluminum alkyl compound to form at least one antifouling compound comprising the following structure or dimer form thereof: (I); and adding the at least one antifouling compound, an additional amount of the at least one aluminum alkyl compound, the at least one titanate compound, and ethylene to a jet loop reactor to oligomerize the ethylene to produce one or more of 1-butene, 1-hexene, or 1-octene. (I)

The invention relates to a method for producing styrene, starting from ethylbenzene, the method in particular involving the process of transferring heat from the obtained product gas flow to an H2O-containing flow. It has been found that the present method for producing styrene allows the heat required to carry out the dehydrogenation reaction to be efficiently recycled, in particular in order to heat the H2O-containing input flow being used.

The present invention provides a system and a process for the production of methane, C2-C100 linear alkanes, C2-C10 olefins, oxygenates, methanol and combinations thereof, comprising: an oxyfuel combustor comprising a combustion gas outlet, and a first fluid entrance; a heat recovery system; a carbon capturing unit comprising an adsorption column which comprises a combustion gas inlet in fluid communication with the combustion gas outlet of the oxyfuel combustor, and a feed gas inlet; a desorption column; one or more methanol synthesis reactors; wherein the adsorption column comprises a base portion and a top portion; the adsorption column extends a height from the base portion to the top portion; the base portion corresponds to one half of the height of the adsorption column; the feed gas inlet and the combustion gas inlet are located in the base portion; and the feed gas inlet is located above the combustion gas inlet in the base portion.

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.

There is provided a method of producing propylene comprising reacting isopropanol in a feed in a reactor containing an acid catalyst to produce a reactor product comprising propylene, wherein the reactor has a reactor inlet temperature from about 80°C to about 240°C, and separating at least a portion of the propylene from the reactor product.

The disclosure relates to compositions that include a catalyst and calcium carbonate. More specifically, a composition including calcium carbonate and a catalyst that includes molybdenum (Mo), vanadium (V), tellurium (Te), niobium (Nb), and oxygen (O).

The present disclosure relates to methods of making cyclic terpenoids through substrate-controlled catalysis taking place in the presence of a supramolecular capsule.

The present disclosure provides a catalytic material having a catalyst supported by a support of the hibonite type. The catalytic materials include a first catalytic material comprising an oxidative coupling methane catalyst for oxidative coupling of methane and a second selective oxidation catalytic material comprising a selective oxidation catalyst that preferentially oxidizes hydrogen and carbon monoxide relative to methane. Also provided are systems comprising the first and second catalytic materials for performing OCM reactions using a low temperature feed gas mixture, and methods of making C2 + compounds using the same.

A process for producing an aldehyde is disclosed. The process comprises: hydroformylating an olefin to form the aldehyde using a hydroformylation catalyst; recovering an effluent stream comprising the aldehyde, hydrogen and the hydroformylation catalyst; passing the effluent stream to a stripper; contacting the effluent stream with a strip gas in the stripper to produce a stripped effluent stream having a lower hydrogen concentration than the effluent stream; and recovering the stripped effluent stream.

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.

Provided are: a production method for a modified aluminosilicate that makes it possible to highly selectively produce a hydroquinone via a reaction between a phenol and hydrogen peroxide, with industrially advantageous conditions; a production method for a catalyst that is for producing an aromatic dihydroxide compound and that includes the modified aluminosilicate; a production method for an aromatic dihydroxide compound that uses the catalyst; and a modified aluminosilicate.　A production method for an aluminosilicate according to the present invention comprises: a first step for preparing a liquid obtained by contact between a metal compound (AL) containing aluminum and oxygen and silica in the form of a sol containing water, and obtaining an aluminosilicate in which the molar ratio (HMR) between water and silica is in a specific range; a second step for treating, with acid, the aluminosilicate obtained in the first step; a third step for performing primary firing with respect to the treated product obtained in the second step; and a fourth step for bringing into contact the primary fired product obtained in the third step and a liquid containing one or more elements selected from the group consisting of group 4 elements and group 5 elements of the periodic table, and thereafter performing drying and secondary firing. The metal compound (AL) is preferably a zeolite. The first step preferably includes a step for removing the water.

Systems and methods for processing a C3 and C4 hydrocarbon mixture have been disclosed. The C3 and C4 hydrocarbon mixture is first processed in an isomerization unit to isomerize n-butane to form isobutane. The resulting effluent stream from the isomerization unit comprising primarily isobutane and C3 hydrocarbons, collectively, is flowed into a separation unit configured to separate the effluent stream to form a C3 stream comprising C1 to C3 hydrocarbons and a C4 stream comprising primarily isobutane. The isobutane in the C4 stream is further dehydrogenated to form isobutene, which is further flowed into an MTBE synthesis unit as a feedstock for producing MTBE.

A method of preparing C8 to C18 alkanes is described comprising hydrogenating C8 to C18 alkenes in a reactor with a bulk catalyst bed and a minor catalyst bed, wherein the reactor comprises means for supplying hydrogen and a fresh feed and a recycled at least partially converted liquid product stream to said bulk catalyst bed; means for collecting a partially converted liquid product stream from said bulk catalyst bed and recycling at least a portion thereof to said means for supplying fresh feed and recycled at least partially converted liquid product stream to said bulk catalyst bed; a minor catalyst bed extending substantially vertically through the bulk catalyst bed; means for supplying hydrogen and recycled at least partially converted liquid product stream only to said minor catalyst bed; a separating wall between said bulk catalyst bed and said minor catalyst bed; and a means for collecting a product stream from said minor catalyst bed, the product stream comprising C8 to C18 alkanes.

The disclosure concerns a propane dehydrogenation process, remarkable in that it comprises the steps of (a) providing a feed (1) comprising one or more vegetable oils; (b) providing an hydrogen stream (3) and perfoming an hydrogenation reaction on said feed (1) to generate at least one effluent (6) comprising propane and one or more fatty acids; (c) separating propane from said one or more fatty acids comprised within said at least effluent (6) generated at step (b) to generate a stream (13) comprising propane; (d) providing at least one proton-conducting catalytic membrane, each proton-conducting catalytic membrane comprising at least one dehydrogenation catalyst; (e) feeding to said one or more proton-conducting catalytic membranes under propane dehydrogenation conditions the stream generated at step (c); and (f) recovering a first effluent (19) comprising at least propylene. The disclosure also concerns an installation for carrying out said propane dehydrogenation process thereof.

Disclosed is a catalyst for hydrogenating aromatic compounds obtainable by a process comprising at least the following steps: a) contacting an alumina support with at least one organic additive; b) contacting the alumina support with at least one nickel metal salt, the melting temperature of which is between 20°C and 150°C; c) heating the solid mixture obtained at the end of steps a) and b) with stirring; d) drying the catalyst precursor at the end of step c); and e) performing a heat treatment step on the dried catalyst precursor obtained at the end of step d).

The invention is related to a process for synthesizing a sustainable aviation fuel composition. The process comprises providing a reaction mixture comprising a first compound that is at least one of mevalonolactone, mevalonic acid, mevalonate salt, dehydromevalonic acid, dehydromevalonate salt, dehydromevalonolactone or combinations thereof. The process then involves converting the first compound in the reaction mixture to provide a first intermediate comprising isoprene. Then, the isoprene in the first intermediate is reacted in the presence of a first heat transfer agent to provide a second intermediate comprising terpenes. Finally, the second intermediate is allowed to react in the presence of a second heat transfer agent, or alternatively in neat conditions, and optionally in presence of a catalyst to provide the sustainable fuel composition. The sustainable aviation fuel composition made available from the process of the invention is found to comprise monocyclic aromatic hydrocarbons (MAHs) at useful concentration ranges (along with cycloalkanes) while they are substantially devoid of Polycyclic aromatic hydrocarbons (PAHs).

The invention relates to a process comprising reacting mevalonic acid, or a solution comprising mevalonic acid, to yield a first product or first product mixture, optionally in the presence of a solid catalyst and / or at elevated temperature and / or pressure. The invention further relates to a process comprising: (a) providing a microbial organism that expresses a biosynthetic mevalonic acid pathway; (b) growing the microbial organism in fermentation medium comprising suitable carbon substrates, whereby biobased mevalonic acid is produced; and (c) reacting said biobased mevalonic acid to yield a first product or first product mixture.

The present invention addresses the problems of providing a catalyst that has high heat resistance and that enables methacyrlic acid to be produced at high yield, and providing a method for producing methacyrlic acid and methacrylic acid esters using the catalyst. The above problems are solved by using a catalyst having a specific peak according to powder X-ray measurement.

The present invention relates to the field of molecular sieves, and particularly relates to a P-modified MWW molecular sieve, and a preparation method therefor and the use thereof. The molecular sieve shows APδ-7 / AP ≥ 40%, and preferably ≥ 50%, wherein APδ-7 represents a peak area of a P-species signal peak, which has a chemical shift within the range of -22 ppm to 8 ppm in a 31P MAS NMR spectrogram, and AP represents the total peak area of all signal peaks in the 31P MAS NMR spectrogram. A catalyst which contains the molecular sieve of the present invention has high levels of activity, selectivity and stability, and has an excellent carbon deposition resistance capability.

The invention discloses a preparation method of a propylene dimerization catalyst, which comprises the following steps: placing a nickel source, an organic ligand and a cobalt molybdenum compound in an anion solution, heating and stirring uniformly, and then drying, roasting and crushing to obtain catalyst active component powder; dissolving non-water-soluble resin, a surfactant and a porous material in ethanol to obtain a resin mixed solution; dissolving a dispersing agent in deionized water to obtain a microsphere forming solution, performing ultrasonic treatment on the resin mixed solution, dropwise adding the resin mixed solution into the microsphere forming solution, stirring, filtering out the formed microspheres, and drying at room temperature to obtain porous material microspheres; and placing the porous material pellets in a coating machine, enabling the active component to be attached to the pellet carrier under centrifugal force, and drying and roasting to obtain the catalyst pellets. The catalyst provided by the invention has higher activity, and improves the conversion rate of the dimerization reaction and the selectivity of the reaction target product 4-methyl-1-pentene under the synergistic cooperation of the catalyst and the cocatalyst.