Using Transition Metal-containing Catalyst Patents (Class 585/405)
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Patent number: 8735310Abstract: To improve stability of catalytic performance, an aromatizing catalyst for converting lower hydrocarbons into aromatic compounds is regenerated. A regeneration process of the aromatizing catalyst according to the present invention includes the steps of: (a) reacting the aromatizing catalyst with a hydrogen gas in an atmosphere containing the hydrogen gas after using the aromatizing catalyst in an aromatizing reaction for converting lower hydrocarbons into aromatic compounds; (b) decreasing a temperature of the atmosphere containing the hydrogen gas reacted with the aromatizing catalyst, by supplying one of an inert gas and a reducing gas to the atmosphere; (c) reacting the aromatizing catalyst reacted with this inert gas, with an oxidizing gas; and (d) reacting the aromatizing catalyst reacted with the oxidizing gas, with a reducing gas.Type: GrantFiled: March 17, 2008Date of Patent: May 27, 2014Assignee: Meidensha CorporationInventors: Hongtao Ma, Yuji Ogawa
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Publication number: 20110060175Abstract: [Problem to be Solved]The object of the present invention is to provide an industrially favorable production process whereby adamantanes can be produced in a high yield using a catalyst, which is used for the isomerization reaction of a tricyclic saturated hydrocarbon compound having 10 or more carbon atoms, does not require a complicated waste liquid treatment operation, and makes high-yield production of adamantanes possible. [Solution] A process for producing a compound having an adamantane structure, wherein one or more catalysts selected from the following (a) to (c) are used: (a) zeolite having MWW topology; (b) delaminated MWW-type zeolite; and (c) interlayer-expanded MWW-type zeolite prepared by treatment with a metal compound.Type: ApplicationFiled: April 23, 2009Publication date: March 10, 2011Applicant: IDEMITSU KOSAN CO., LTDInventors: Ikuko Takahashi, Akio Kojima
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Patent number: 7601881Abstract: A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a tungstated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a phosphorus component, and at least one platinum-group metal component which is preferably platinum. The catalyst has a structure other than a heteropoly anion structure.Type: GrantFiled: January 30, 2008Date of Patent: October 13, 2009Assignee: UOP LLCInventors: Ralph D. Gillespie, Feng Xu
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Patent number: 6657093Abstract: A process for preparing compounds of the formula (II), where the substituents R1 to R5 are each independently H, CH3, straight-chain or branched C1-C8-alkyl, CH(OC1-C5-alkyl)2, CH(C1-C5-alkyl)(OC1-C5-alkyl), CH2(OC1-C5-alkyl), CH(CH3)(OC1-C5-alkyl), C1-C8-alkoxy, N(C1-C5-alkyl)2, phenyl, substituted phenyl, aryl, heteroaryl, S(C1-C5-alkyl) or a radical Caryl, alkyl, and the symbols X1 to 5 are each carbon.Type: GrantFiled: June 13, 2002Date of Patent: December 2, 2003Assignee: Clariant GmbHInventors: Andreas Meudt, Michael Erbes, Klaus Forstinger
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Patent number: 5430200Abstract: The present invention provides in a particular embodiment an improvement in the process for producing phenol by the acid-catalyzed cleavage of cumene hydroperoxide (CHP). The reactant stream fed to the cleavage reactor also includes the contaminant by-product dimethyl benzyl alcohol (DMBA) formed during the direct oxidation of cumene to CHP. This contaminant DMBA further reacts in the cleavage reactor to reduce the yield of phenol and produce undesirable and unreclaimable by-products. The improvement provided herein comprises performing the cleavage reaction at a reduced residence time of generally from one-half to five minutes, whereby the formation of .alpha.-methyl styrene from DMBA is promoted and the formation of the undesirable and unreclaimable by-products is reduced; .alpha.-methyl styrene is not only a useful by-product, but can be recycled and hydrogenated to the cumene starting material.Type: GrantFiled: September 16, 1994Date of Patent: July 4, 1995Assignee: Hercules IncorporatedInventor: Horace E. Hood
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Patent number: 5371305Abstract: The present invention provides in a particular embodiment an improvement in the process for producing phenol by the acid-catalyzed cleavage of cumene hydroperoxide (CHP). The reactant stream fed to the cleavage reactor also includes the contaminant by-product dimethyl benzyl alcohol (DMBA) formed during the direct oxidation of cumene to CHP. This contaminant DMBA further reacts in the cleavage reactor to reduce the yield of phenol and produce undesirable and unreclaimable by-products. The improvement provided herein comprises performing the cleavage reaction at a reduced residence time of generally from one-half to five minutes, whereby the formation of .alpha.-methyl styrene from DMBA is promoted and the formation of the undesirable and unreclaimable by-products is reduced; .alpha.-methyl styrene is not only a useful by-product, but can be recycled and hydrogenated to the cumene starting material.Type: GrantFiled: December 31, 1992Date of Patent: December 6, 1994Assignee: Hercules IncorporatedInventor: Horace E. Hood
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Patent number: 4664777Abstract: A process for the conversion of fused two-ring aromatic and fused two-ring hydroaromatic hydrocarbons into lower boiling aromatics, particularly alkylbenzenes of higher octane values. Such feeds are contacted in the presence of hydrogen over an iron catalyst at temperature sufficient to selectively hydrogenate and hydrocrack said fused two-ring aromatic hydrocarbon compound, or fused two-ring hydroaromatic hydrocarbon compounds, or both, to produce lower molecular weight, higher octane components suitable for direct blending with gasoline.Type: GrantFiled: July 31, 1985Date of Patent: May 12, 1987Assignee: Exxon Research and Engineering CompanyInventors: Carl W. Hudson, Glen P. Hamner
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Patent number: 4446013Abstract: The catalytic reforming of a feedstock which contains a derivative of cyclopentane or which contains organic compounds which are convertible to a derivative of cyclopentane is carried out in the presence of a hydrogrel of zinc titanate and a suitable acidic material. Also, the attrition resistance of zinc titanate is improved by incorporating the zinc titanate into a hydrogel structure.Type: GrantFiled: November 22, 1982Date of Patent: May 1, 1984Assignee: Phillips Petroleum CompanyInventor: Arthur W. Aldag, Jr.
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Patent number: 4153637Abstract: A process for the dehydroisomerization of hydrocarbons in the presence of a catalyst composed of a metal of Group VIII supported on mordenite in hydrogen form and treated with ammonia.Type: GrantFiled: December 23, 1977Date of Patent: May 8, 1979Assignee: S.A. Texaco Belgium n.v.Inventors: Walter F. DE Vleesschauwer, Alan Molyneux