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| Number | Title | Issue Date |
| 7767609 | Method for recovering reforming catalyst, catalyst and adsorbent A method for recovering reforming catalyst comprises obtaining spent reforming catalysts; immersing the spent reforming catalysts with different degrees of aging into a light solution to obtain immersed catalysts and allowing the light solution to enter pores in the... | 08/03/2010 |
| 7576023 | Naphtha desulfurization with selectively suppressed hydrogenation Naphtha is selectively hydrodesulfurized in the presence of a sulfided, treated catalyst comprising at least a Group VIB metal catalytic component, to produce sulfur-reduced naphtha with reduced olefin loss due to saturation. The catalyst is treated with hydrogen, a... | 08/18/2009 |
| 7449420 | Production of alkyl aromatic compounds with catalyst reactivation Improved processes are provided for the production of alkyl aromatic compounds using zeolite catalyst(s) and for periodic reactivation in situ of zeolite catalyst(s) that have at least in part become deactivated. Processes according to this invention are typically c... | 11/11/2008 |
| 7407905 | Method for reactivating catalysts and a method for recycling supercritical fluids used to reactivate the catalysts A method of reactivating a catalyst, such as a solid catalyst or a liquid catalyst. The method comprises providing a catalyst that is at least partially deactivated by fouling agents. The catalyst is contacted with a fluid reactivating agent that is at or above a cr... | 08/05/2008 |
| 7287745 | Liquid-continuous column distillation Bubble columns fractionate with vapor-liquid mass transfer efficiencies approaching that of distillation towers when vapor velocities in excess of 50% of jet flood are used. If the vapor velocities are pushed above about 70% of jet flood then the distillation perfor... | 10/30/2007 |
| 7282151 | Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using pressure filtration A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves recovery of a metal catalyst from an oxidizer purge st... | 10/16/2007 |
| 7208440 | Method for pretreatment of catalysts with a phosphoric acid base The invention relates to a method for pretreatment of a solid catalyst that is obtained by a reaction between an inorganic binder and phosphoric acid, whereby said method comprises a stage in which said catalyst is brought into contact with a mixture of hydrocarbons... | 04/24/2007 |
| 7199068 | Reactive distillation alkylation process including in situ catalyst regeneration A unified process which couples a unique in situ catalyst regeneration process with a continuous reactive distillation under pressure for the alkylation of light aromatic hydrocarbons such as benzene with C2–C30 olefins using a solid acid alk... | 04/03/2007 |
| 7130312 | Packet processing apparatus, packet processing method, and packet exchange A packet processing method for exchanging packet data through a plurality of layers is disclosed, that comprises the steps of storing the entire packet to a packet memory; and storing part of each packet of the packet data used in processes of a layer 2 processing p... | 10/31/2006 |
| 7115537 | Process for the regeneration of zeolite catalysts A process for the regeneration of a zeolitic catalyst which is at least partially exhausted by use in the synthesis of optionally substituted methylenedianiline (MDA) and derivatives thereof, or of a mixture of optionally substituted MDA and derivatives thereof, wit... | 10/03/2006 |
| 7091252 | Liquid-continuous column distillation Bubble columns fractionate with vapor-liquid mass transfer efficiencies approaching that of distillation towers when vapor velocities in excess of 50% of jet flood are used. If the vapor velocities are pushed above about 70% of jet flood then the distillation perfor... | 08/15/2006 |
| 7087803 | Method for the recovery of perfluorinated sulphonic acid Method for the recovery of a perfluorinated sulphonic acid from a viscous organic residue by aqueous extraction of the acid from the residue in presence of a solvent containing aromatic compounds. ... | 08/08/2006 |
| 7074735 | Selectively suppressing catalytic hydrogenation The hydrogenation activity of a heteroatom removal catalyst, having activity for both heteroatom removal and hydrogenation, is selectively suppressed by a treatment which comprises contacting the catalyst with (i) hydrogen, (ii) a selectively deactivating agent that... | 07/11/2006 |
| 6982235 | Method for regenerating solid catalyst A process for regenerating a solid catalyst which has been used for producing propylene oxide through an epoxidation reaction of propylene with an organic peroxide in a reactor packed with the solid catalyst, which comprises allowing a liquid to flow through the cat... | 01/03/2006 |
| 6908873 | Regeneration of spent supported metal catalysts A method for regenerating spent supported metal catalysts comprising treating the spent catalyst with an organo-metallic complex forming agent having an ionization constant pK1 of at least 2.5. The catalyst activity is restored to an activity level near t... | 06/21/2005 |
| 6887813 | Method for reactivating solid catalysts used in alkylation reactions A method for reactivating a solid alkylation catalyst is provided which can be performed within a reactor that contains the alkylation catalyst or outside the reactor. Effective catalyst reactivation is achieved whether the catalyst is completely deactivated or part... | 05/03/2005 |
| 6878471 | Process for the regeneration of reforming catalysts The present invention relates to methods for the regeneration of catalytic reactors. In particular it relates to methods for regenerating a fuel-processing catalyst while it is still being used to supply hydrogen to a fuel cell. The temperature of the catalyst may b... | 04/12/2005 |
| 6872678 | Process for activating a catalyst containing an S-containing additive The present invention pertains to a process for activating a catalyst composition comprising at least one hydrogenation metal component of Group VI and/or Group VIII of the Periodic Table, and an S-containing organic additive, wherein the catalyst is contacted with ... | 03/29/2005 |
| 6790920 | Process for removal of silicon compounds from solvents by selective absorption Removing silicon species from hydrocarbon solvents such as cyclohexane by flowing the hydrocarbon solvent through a selective adsorbent selected from the group consisting of aluminas, silicon-aluminas, ion exchange resins, zeolite Y, and combinations thereof. ... | 09/14/2004 |
| 6740615 | Regeneration of used supported noble metal catalysts A method for regenerating used supported noble metal catalysts, which method includes solvent cleaning the used catalyst by contact with a suitable organic liquid cleaning solvent such as alcohols, ketones and such to remove organic deposits from the catalyst, follo... | 05/25/2004 |
| 6685896 | Method for recovering rhodium from reaction products of oxosynthesis The invention relates to a method for separating and recovering rhodium from reaction products of oxosynthesis, especially reaction products containing cobalt. The invention also relates to the reuse of rhodium as a catalyst for hydroformulation and to a ... | 02/03/2004 |
| 6683015 | Method for reactivating a catalyst composition The present invention is directed to a method for reactivating a deactivated carbonylation catalyst composition previously used in a carbonylation reaction involving an aromatic hydroxy compound, carbon monoxide and oxygen, so that the re-activated cataly... | 01/27/2004 |
| 6673239 | Hydrocarbon purificatin system regeneration A system and process for removing water and heteroatom-containing compounds from hydrocarbons and for regenerating the adsorbent used in the system and process is disclosed and includes contacting the hydrocarbon stream with a water adsorbent and a hetero... | 01/06/2004 |
| 6579821 | Method for reactivating solid catalysts used in alkylation reactions A method for reactivating a solid alkylation catalyst is provided which can be performed within a reactor that contains the alkylation catalyst or outside the reactor. Effective catalyst reactivation is achieved whether the catalyst is completely deactiva... | 06/17/2003 |
| 6475943 | Catalyst activation process The present invention relates to a process for the activation of a catalyst in the presence of a hydrocarbon liquid, which catalyst comprises a Group Ib, VIIb or VIII metal compound, by contacting the catalyst with a hydrogen-containing gas at a hydrogen ... | 11/05/2002 |
| 6413897 | Method for regenerating an alkylation catalyst Disclosed is an alkylation process which utilizes a catalyst containing hydrogen fluoride, and, optionally, a volatility reducing additive, as an alkylation catalyst. The process provides for the regeneration of an alkylation catalyst having ASO, and, opt... | 07/02/2002 |
| 6365761 | Process for preparing alkylene oxide Process for the preparation of alkylene oxide, which process comprises passing a feed comprising an organic hydroperoxide and alkene through a bank of at least two serially connected reactors all containing a bed of heterogeneous epoxidation catalyst part... | 04/02/2002 |
| 6284807 | Slurry hydrocarbon synthesis process with increased catalyst life A slurry catalytic hydrocarbon synthesis process which employs a catalyst comprising a supported cobalt component achieves a short term catalyst half life of more than 10 days, by using a syngas feed which contains less than fifty parts per billion of a c... | 09/04/2001 |
| 6273102 | Method of cleaning and maintaining petroleum refining plants A repairing method of a petroleum refining plant for efficiently conducting cleaning process of process equipment and pipings, unloading process of agglomerated catalyst, rinsing work of the process equipment and the pipings, thereby reducing plant shutdo... | 08/14/2001 |
| 6232495 | Methods for treating cobalt catalyst in oxidation mixtures resulting from oxidation of hydrocarbons to dibasic acids This invention relates to methods and reactor devices for controlling the oxidation of hydrocarbons to dibasic acids, in the presence of a cobalt catalyst and a monobasic acid, such as acetic acid, by treating the catalyst from the reaction mixture, outsi... | 05/15/2001 |
| 6222059 | Process for the manufacture of aliphatic alpha, omega amino nitriles A process for preparing aliphatic alpha,omega-amino nitrites by partial hydrogenation of aliphatic alpha,omega-dinitriles in the presence of a catalyst, wherein the catalyst used for the partial hydrogenation comprises (a) iron or a compound based on iron... | 04/24/2001 |
| 6194625 | Alkylation by controlling olefin ratios Disclosed are various embodiments for alkylating olefins and isoparaffins in the presence of an acid to reduce and/or control acid consumption or maximize and/or control the octane number of the produced alkylate product. One embodiment includes alkylatio... | 02/27/2001 |
| 6187708 | Process for activation of catalysts with a nitrogenous compound and excess thionic compound the catalysts that is obtained and it use in hydroconversion The invention relates to a process for the sulfurization of hydroconversion catalysts, whereby said catalyst contains at least one element of group VIII of the periodic table and optionally an element of group VI, whereby said metal is present in the oxid... | 02/13/2001 |
| 6162754 | Process for regenerating a catalyst contained within a bubble-column reactor with draft-tube and process for the production of a hydrocarbon Continuous process for the production of prevalently heavy hydrocarbons starting from synthesis gas in the presence of a gas phase, a liquid and a solid catalyst, the above process being carried out using a bubble column, characterized in that the bubble ... | 12/19/2000 |
| 6110856 | Catalysts suitable for preparing aliphatic alpha-, omega-aminonitriles by partial hydrogenation of aliphatic dinitriles A catalyst suitable for preparing aliphatic alpha, omega-aminonitriles by partial hydrogenation of aliphatic dinitriles comprises (a) metallic cobalt, a cobalt compound or a mixture thereof, the proportion of metallic cobalt based on (a) being from 20 to 100% ... | 08/29/2000 |
| 6096673 | Catalyst recovery in the production of 2,5-dihydrofuran by isomerization of vinyl oxirane An improved process is provided for the recovery of catalyst components from oligomeric impurities which are formed during the industrial preparation of 2,5-dihydrofuran by the catalytic isomerization of vinyl oxirane followed by an essential separation o... | 08/01/2000 |
| 6075174 | BF3 removal from BF3 catalyzed olefin oligomer This invention concerns a process for recovering BF3 from a BF3 /promoter complex catalyzed -olefin oligomerization product stream, which process comprises thermally cracking the complex in the product stream to yield BF3... | 06/13/2000 |
| 6015932 | Reactivation of a high-activity isomerization catalyst A reactivation process is disclosed for a catalyst formulated to selectively upgrade naphtha to obtain an isoparaffin-rich product for blending into gasoline. The process utilizes a solid strong-acid catalyst comprising an anion-modified metal oxide, pref... | 01/18/2000 |
| 5990037 | Method of treating spontaneously combustible catalysts Self-heating characteristics of a spontaneously combustible catalyst are reduced by treating spontaneously combustible catalysts with oxygen-containing hydrocarbons having at least 12 carbon atoms. The treatment is particularly suitable for reducing the s... | 11/23/1999 |
| 5986158 | Process for alkylating hydrocarbons The invention pertains to a process for alkylating hydrocarbons in which an alkylatable organic compound is reacted with an alkylation agent to form an alkylate in the presence of a catalyst comprising a hydrogenating function and a solid acid constituent... | 11/16/1999 |
