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| Number | Title | Issue Date |
| 8173852 | Methods and apparatuses for producing styrene from ethylbenzene Embodiments of methods and apparatuses for producing styrene are provided. The method comprises the steps of introducing ethylbenzene to a first dehydrogenation reactor containing a first high activity dehydrogenation catalyst at a first predetermined inlet temperat... | 05/08/2012 |
| 7964765 | Styrene monomer process based on oxidative dehydrogenation of ethylbenzene using COas a soft oxidant Processes are provided for the production of styrene monomer by oxidative dehydrogenation of EB using CO2 as a soft oxidant. Carbon dioxide is used as the reaction diluent in one or more dehydrogenation reactors and to supply the heat required for the end... | 06/21/2011 |
| 7687673 | Process for reacting over two catalyst beds A process for reacting feed in and an apparatus comprising a radial flow reactor including a first catalyst bed disposed between an outer wall and a centerpipe of the vessel and a second catalyst bed disposed within a centerpipe. Also disclosed is a method of loadin... | 03/30/2010 |
| 7642390 | EB/SM splitter heat recovery Improved methods and related apparatus are disclosed for efficiently recovering the heat of condensation from overhead vapor produced during separation of various components of dehydrogenation reaction effluent, particularly in ethylbenzene-to-styrene operations, by... | 01/05/2010 |
| 7435862 | Radial reactor loading of a dehydrogenation catalyst A radial reactor for utilization for catalytic reactions of gaseous or liquid feedstreams including an annular catalyst bed, wherein the material contained within the catalyst bed includes an active catalyst material, contained within an outer ring-shaped layer of t... | 10/14/2008 |
| 7393986 | Process for the production and purification of vinyl aromatic monomers Process for the production of vinyl aromatic monomers which comprises: a) feeding an aromatic stream and an olefinic stream to an alkylation unit; b) feeding the reaction product coming from the alkylation section to a first separation section; c) recovering the mon... | 07/01/2008 |
| 7285205 | Process of regenerative reforming In a regenerative reforming facility using a series of moving beds, a direct supply of regenerated catalyst, optionally reduced is passed into at least two of the reactors of the series. Spent catalysts from different reactors are passed into a common mixing apparat... | 10/23/2007 |
| 7276636 | Styrene process with recycle from dehydrogenation zone A styrene process is disclosed that uses a dehydrogenation reactor and a transalkylation reactor and in which a significant portion of the benzene, the inhibitors, or both, recovered from the dehydrogenation reactor passes to the transalkylation reactor. The process... | 10/02/2007 |
| 7244868 | Process for the dehydrogenation of an unsaturated hydrocarbon A process for the catalytic dehydrogenation of a first unsaturated hydrocarbon to form a second unsaturated hydrocarbon which has one olefinically unsaturated bond more than the first unsaturated hydrocarbon and otherwise an unchanged carbon skeleton, which process ... | 07/17/2007 |
| 7227049 | Ni catalysts and methods for alkane dehydrogenation Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), y... | 06/05/2007 |
| 7125817 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Group 3 a... | 10/24/2006 |
| 7122493 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises: (1) at least one solid acid component, (2) at least one metal-based compo... | 10/17/2006 |
| 7122495 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst system contains at least one solid acid component and at least one metal-based component which consists of (a) oxygen and/or sulfur and ... | 10/17/2006 |
| 7122494 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of two or more elements from Groups 4â... | 10/17/2006 |
| 7122492 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Groups 1 ... | 10/17/2006 |
| 7094939 | Styrene process with recycle from dehydrogenation zone A styrene process is disclosed that uses a dehydrogenation reactor and a transalkylation reactor and in which a significant portion of the benzene, the inhibitors, or both, recovered from the dehydrogenation reactor passes to the transalkylation reactor. The process... | 08/22/2006 |
| 6969496 | Apparatus with increased yield and selectivity using side-by-side reaction zones An apparatus provides for increased feed throughput without loss of conversion or selectivity by increasing the catalyst volume in a final reactor of at least three reaction zones. The catalyst volume of the final reactor may be larger because the inner and outer sc... | 11/29/2005 |
| 6884915 | Process for producing styrene The present invention is a process for producing styrene by dehydrogenation of ethylbenzene, which contains the steps of (i) feeding a raw material gas containing ethylbenzene and steam to a first dehydrogenating step to produce a reacted gas containing ethylbenzene... | 04/26/2005 |
| 6544408 | Process and installation for the production of aromatic compounds in a fixed bed Process for the production of aromatic compounds, such as reforming, that uses at least one fixed catalyst bed with a base of platinum and 0.08% rhenium. In said process, before moving onto the bed, the feedstock undergoes a heat exchange with the effluen... | 04/08/2003 |
| 6525232 | Process and apparatus for endothermic reactions of organic compounds The invention provides process and apparatus for conducting an endothermic reaction of an organic compound in the presence of molecular hydrogen and of multicomponent solids. The process comprises contacting the compound with a solid catalyst for the endo... | 02/25/2003 |
| 6472577 | Process for increasing the yield and selectivity of a dehydrogenation process using side-by-side reaction zones A method increases the feed throughput for a process of dehydrogenating light hydrocarbons without loss of conversion or selectivity by increasing the catalyst volume in only the final reactor of at least three reaction zones. The catalyst volume of the f... | 10/29/2002 |
| 6388155 | Styrene dehydrogenation reactor effluent treatment The fouling in a styrene production process involving the dehydrogenation of ethylbenzene is reduced by removing polymerizable components of the gaseous dehydrogenation effluent prior to the condensation of the effluent in the main condenser system. This ... | 05/14/2002 |
| 6388154 | Process for producing styrene A process for producing styrene by oxidative dehydrogentation of ethylbenzene, wherein the dehydrogenation of ethylbenzene is conducted through at least the following steps (1) to (3), whereby styrene can be produced in a high yield by controlling the low... | 05/14/2002 |
| 6380450 | Process for producing indene Tetrahydroindene is dehydrogenated in a vapor phase in the presence of a metallic catalyst, e.g., a nickel-molybdenum catalyst, to produce indene, which is industrially useful in high yield while inhibiting the catalyst from suffering a decrease in activi... | 04/30/2002 |
| 6300534 | Process for producing dehydrogenated compounds of m-ethyldiphenylalkane A mono-olefin hydrocarbon and/or a di-olefin hydrocarbon represented by the following general formula (3) is selectively produced by dehydrogenating or oxidative-dehydrogenating a mixture of any one of hydrocarbons among the hydrocarbons represented by th... | 10/09/2001 |
| 6171449 | Cascade reboiling of ethylbenzene/styrene columns Apparatus and process are disclosed for the distillation separation of styrene monomer from ethylbenzene utilizing a split feed to two distillation columns in conjunction with cascade reboiling utilizing thermal energy from the overhead of one column to s... | 01/09/2001 |
| 6166267 | Synthesis of n-silylated cyclopentaphenanthrene compounds A method of converting Compound A (1,3-dehydro-cyclopenta[1]phenanthren-2-one) to Compound C (1H-cyclopenta[1]penanthren) in situ in a single reactor is disclosed.... | 12/26/2000 |
| 6096937 | Process for dehydrogenation of ethylbenzene to styrene The present invention discloses a method and apparatus for dehydrogenating ethylbenzene into styrene which method and apparatus eliminate the need for multiple reactors and preheaters by providing a single compact reactor which utilizes the principle of a... | 08/01/2000 |
| 6031143 | Process for the production of styrene Process for the production of styrene which comprises: a) feeding to an alkylation unit a stream of benzene and a stream of recycled product containing ethylene; b) mixing the stream at the outlet of the alkylation unit, containing ethylbenzene, with a stream ... | 02/29/2000 |
| 5965757 | Synthesis of N-silylated cyclopentaphenanthrene compounds A method for the synthesis of certain N-silylated cyclopentaphenanthrene (Group IV metal) complexes is disclosed.... | 10/12/1999 |
| 5877385 | Process including extractive distillation and/or dehydrogenation to produce styrene from petroleum feedstock including ethyl-benzene/xylene mixtures Disclosed is a process for recovering styrene from a feedstock containing at least styrene, ethylbenzene, and one or more aromatic or non-aromatic hydrocarbon compounds which includes separating said feedstock into a first stream relatively more concentra... | 03/02/1999 |
| 5739071 | Method and apparatus for regeneratinig and stabilizing dehydrogenation catalysts A method and apparatus are disclosed for regenerating and/or stabilizing the activity of a dehydrogenation catalyst used in dehydrogenating an alkylaromatic hydrocarbon to obtain an alkenylaromatic hydrocarbon, the method comprising the steps of continuou... | 04/14/1998 |
| 5710356 | Method of conducting an endothermic reaction in a packed-bed reactor with external energy addition A novel, packed-bed, reverse flow reactor is provided for the endothermic dehydrogenation of ethylbenzene to styrene. The catalyst bed is flanked by inert end sections to prevent the occurrence of the reverse reaction. Ethylbenzene vapor is added at one e... | 01/20/1998 |
| 5461179 | Regeneration and stabilization of dehydrogenation catalysts A method and apparatus are disclosed for regenerating and/or stabilizing the activity of a dehydrogenation catalyst used in dehydrogenating an alkylaromatic hydrocarbon to obtain an alkenylaromatic hydrocarbon, the method comprising the steps of continuou... | 10/24/1995 |
| 5453177 | Integrated distillate recovery process An integrated three-column process for recovering hydrocarbon distillate products from a hydroprocessing or hydrocracking reactor effluent stream and a hydrocarbon distillate product recovery train are disclosed. According to the present recovery process,... | 09/26/1995 |
| 5446227 | Co-production of an alkenyl aromatic compound or precursor thereof and an oxygenated sulfur-containing compound A process for co-production of an alkenyl aromatic compound such as, for example, styrene and t-butylstyrene, and an oxygenated sulfur-containing compound such as, for example, a sulfoxide or a sulfone is disclosed which comprises: (1) contacting, in the ... | 08/29/1995 |
| 5401895 | Process for preparing divinylbenzene In the recovery of dehydrogenation oil from the reaction product gas from the vapor-phase catalytic dehydrogenation of diethylbenzene by condensing the gas in a condenser, this invention relates to a process for preparing divinylbenzene by spraying a high... | 03/28/1995 |
| 5053572 | Multistage ethylbenzene dehydrogenation process with split-flow hydrocarbon feed An improved multistage ethylbenzene dehydrogenation process comprising feeding steam and a major fraction of a hydrocarbon feed to a first reactor and feeding a remaining minor fraction of the hydrocarbon feed and a product of the first reactor to a secon... | 10/01/1991 |
| 5001291 | Hydrocarbon dehydrogenation reactions This invention relates to a process for (a) catalytically dehydrogenating a saturated hydrocarbon to the corresponding unsaturated hydrocarbon and hydrogen, (b) removing hydrogen from the products of step (a) over a catalyst supported on tin oxide and (c)... | 03/19/1991 |
| 4973779 | Hydrocarbon conversion process utilizing surface impregnated catalyst A hydrocarbon conversion process which utilizes a novel catalytic composite is disclosed. The catalyst composite comprises a platinum group metal component, a first modifier selected from Group IA and IIA elements of the Periodic Table, a second modifier ... | 11/27/1990 |
