Quotables
"The radio craze will die out in time."
Thomas Edison ; 1922
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7282619 | Method of operating a dehydrogenation reactor system Described is a method for operating and shutting down a dehydrogenation reactor that contains a volume of dehydrogenation catalyst. After termination of the introduction of a dehydrogenation feed into the dehydrogenation reactor that is operated under dehydrogenatio... | 10/16/2007 |
| 7279611 | Paraffin dehydrogenation catalyst One aspect of the invention relates to a dehydrogenation catalyst composite containing alumina, chromium oxide, lithium oxide, and sodium oxide. The invention also relates to methods of making the dehydrogenation catalyst composite. Another aspect of the invention r... | 10/09/2007 |
| 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 |
| 7169960 | Dehydrogenation process A process for the dehydrogenation of a C2 or C3 alkyl aromatic compound to a corresponding vinyl aromatic compound in a tubular reactor incorporating a spiral flow path. Preferred embodiments of the invention provide processes for the productio... | 01/30/2007 |
| 7094942 | Carbon dioxide promoted dehydrogenation process for olefins A process for the dehydrogenation of alkane hydrocarbons is disclosed. The process comprises contacting the alkane with a chromium-based dehydrogenation catalyst in the presence of carbon dioxide at a temperature of from about 400° C. to about 700° C., a pressure ... | 08/22/2006 |
| 6841712 | Process for the dehydrogenation of ethylbenzene to styrene A process is described for the dehydrogenation of ethylbenzene to styrene in a fluid-bed reactor-regenerator system, which uses a catalyst based on iron oxide supported on a modified alumina and promoted with further metal oxides. ... | 01/11/2005 |
| 6781024 | Dehydrogenation process Process for the catalytic dehydrogenation of a C2 or C3 alkyl aromatic in which a feedstock containing the alkyl aromatic and steam is supplied into the inlet of a tubular reactor containing a dehydrogenation catalyst. Within the reactor, the f... | 08/24/2004 |
| 6743959 | Method for the dehydrogenation of triisopropyl benzene and diisopropyl benzene An economical and industrial method for the dehydrogenation of triisopropyl benzene can be provided by carrying out the reaction employing a solid catalyst having an iron compound and potassium compound as major components or an iron compound, potassium compound, an... | 06/01/2004 |
| 6600082 | Process for dehydrogenating organic compounds in the presence of a supported bimetallic catalyst with a strong interaction between a group VIII metal and tin A process for dehydrogenating organic compounds, in particular paraffins and naphthenes, is carried out in the presence of a supported catalyst comprising a group VIII metal such as platinum, and tin, at least a portion of which interacts strongly with th... | 07/29/2003 |
| 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 |
| 6511593 | Homogeneous bed of catalyst and a process for transforming hydrocarbons into aromatic compounds using said bed The invention relates to a homogeneous bed of catalyst particles comprising at least one amorphous matrix, at least one noble metal, at least one additional metal M and at least one halogen, and in which, for a catalyst particle: CPt is the loc... | 01/28/2003 |
| 6465704 | Dehydrogenation catalysts A catalyst for the production of alkenylaromatics from alkylaromatics, wherein the catalyst is predominantly iron oxide, an alkali metal compound and a small amount of a source for palladium or platinum. Additional components of the catalyst may include c... | 10/15/2002 |
| 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 |
| 6380449 | Dehydrogenation process Process for the catalytic dehydrogenation of ethylbenzene in which a feedstock containing ethylbenzene and steam is supplied into the inlet of a tubular reactor containing a dehydrogehation catalyst. Within the reactor, the feedstock flows through at leas... | 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 |
| 6242660 | Catalytic system and process for dehydrogenating ethylbenzene to styrene Catalytic system for dehydrogenating ethylbenzene to styrene, containing chromium oxide, tin oxide, at least one oxide of an alkaline metal (M) and an alumina carrier, in delta or theta phase or in a mixture of delta+theta or theta+alpha or delta+theta+al... | 06/05/2001 |
| 6222085 | Catalyst for dehydrogenation of alkylaromatic hydrocarbon, process for producing the catalyst, and process for producing vinylaromatic hydrocarbon by using the catalyst A solid catalyst containing a potassium component and an iron oxide component, which is such that the ratio of the pore volume of pores therein having a diameter of from 20 to 100 nm to that of pores therein having a diameter of up to 100 nm falls between... | 04/24/2001 |
| 6177602 | Process for dehydrogenation of alkylaromatic hydrocarbons using a dehydrogenation catalyst A catalyst for the production of alkenylaromatics from alkylaromatics, wherein the catalyst is predominantly iron oxide, an alkali metal compound and a small amount of a source for palladium or platinum. Additional components of the catalyst may include c... | 01/23/2001 |
| 6166280 | Catalyst for the dehydrogenation of ethylbenzene to styrene Catalysts in the form of cylindrical hollow granules, suitable for the dehydrogenation of ethylbenzene to styrene, and comprising, as active component, ferric oxide and promoters chosen among oxides of alkaline or alkaline-earth metals, oxides of elements... | 12/26/2000 |
| 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 |
| 5962757 | Dehydrogenation catalyst and process Dehydrogenation catalysts are prepared by a predoping process comprising, mixing iron oxide materials with a predopant to form a blend of iron oxide and predopant and heating the blend to the predoping conditions and thereafter forming a catalyst. The cat... | 10/05/1999 |
| 5895829 | Preparation of olefinically unsaturated compounds, in particular sytrene, by catalytic oxidation In a process for preparing olefinically unsaturated compounds such as styrene by oxidative dehydrogenation of corresponding hydrocarbons using a previously oxidized oxygen transferer acting as catalyst in the absence of molecular oxygen and reoxidation of... | 04/20/1999 |
| 5866737 | Oxidation and oxydehydrogenation of hydrocarbons in the fluidized bed A process for the oxidation and oxidative dehydrogenation of hydrocarbons, in particular ethylbenzene, to form corresponding oxidized or olefinically unsaturated compounds, in particular styrene, over an oxygen-conferring, oxygen-regenerable catalyst invo... | 02/02/1999 |
| 5545787 | Process for dehydrogenating hydrocarbons and oxygenated hydrocarbons A continuous process for the dehydrogenation of a hydrocarbon and/or oxygenated hydrocarbon feed, comprising contacting the hydrocarbon and/or oxygenated hydrocarbon feed with a dehydrogenation catalyst at elevated temperature in a reaction zone character... | 08/13/1996 |
| 5510553 | Catalytic dehydrogenation of alkylaromatic hydrocarbons Alkylaromatic hydrocarbons are dehydrogenated into alkenylaromatic hydrocarbons by contacting them in the absence of molecular oxygen with a supported catalyst of the redox type wherein the metal in the catalyst is at a valency such that it is not in its ... | 04/23/1996 |
| 5489724 | High pressure drop endothermic process Aliphatic feeds are converted to olefins and/or aromatics in a multi pressure reactor system. A high pressure first stage reactor generates much or all of the hydrogen needed to reduce catalyst coking in lower pressure downstream reactors. High pressure o... | 02/06/1996 |
| 5476981 | Oxidative dehydrogenation of hydrocarbons with solid superacid catalyst Solid superacid catalyst, for example sulfated zirconia, is used in the oxidative dehydrogenation of saturated or partially saturated hydrocarbons, for example the conversion of isobutane to isobutylene in the presence of an oxygen-containing oxidizing ag... | 12/19/1995 |
| 5436402 | Method for preparing p-isobutylstyrene A method for preparing a high-purity p-isobutylstyrene is here disclosed which comprises the first step of reacting o- and/or m-isobutylethylbenzene, if necessary, together with isobutylbenzene, in the presence of an acid catalyst in a liquid phase at a r... | 07/25/1995 |
| 5354935 | Catalystic method for the dehydrogenation of hydrocarbons A catalyst comprising a preshaped porous support material having applied thereto in finely divided form an active compound chosen from at least one compound of vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc, and optionally a promoter... | 10/11/1994 |
| 5171914 | Dehydrogenation catalyst and process The instant invention relates to an improved dehydrogenation catalyst made up of iron oxide and potassium oxide which has been prepared by combining an iron-containing compound made up of from about 10% to 100% by weight of a micaceous iron oxide and a po... | 12/15/1992 |
| 5097061 | Method for preparing -(4-isobutylphenyl)propionic acid or its precursor A method for preparing -(4-isobutylphenyl)propionic acid or its precursor is here disclosed which comprises a step A of forming p-isobutylstyrene from p-isobutylethylbenzene and a step B of forming -(4-isobutylphenyl)propionaldehyde from p-i... | 03/17/1992 |
| 5023225 | Dehydrogenation catalyst and process for its preparation Improved iron oxide catalysts for the dehydrogenation of ethylbenzene to styrene are made by forming a blend of chromium oxide and yellow iron hydrate and heating the blend to convert the yellow iron hydrate to red iron oxide prior to forming the catalyst... | 06/11/1991 |
| 4902845 | Method to extend life of iron oxide-containing catalysts using low levels of oxygen Catalyst activity life of an iron oxide-containing catalyst is extended by contacting such catalyst with a feedstream containing about 0.0001 to about 0.01 mole of oxygen per mole of feed in the substantial absence of an oxidation catalyst.... | 02/20/1990 |
| 4812597 | Dehydrogenation of dehydrogenatable hydrocarbons Dehydrogenatable hydrocarbons may be subjected to a dehydrogenation reaction in which the hydrocarbons such as ethylbenzene are treated with a dehydrogenation catalyst comprising a modified iron catalyst in the presence of steam. The reaction mixture cont... | 03/14/1989 |
| 4806624 | Dehydrogenation of dehydrogenatable hydrocarbons A process for the catalytic dehydrogenation of a dehydrogenatable C2 -plus feed hydrocarbon which comprises the steps of: (a) passing a feed stream comprising the C2 -plus feed hydrocarbon into a dehydrogenation zone and through at l... | 02/21/1989 |
| 4804799 | Dehydrogenation catalyst A dehydrogenation catalyst containing iron and promoted with potassium and cerium has been shown to have improved activity when a copper compound is added thereto as a component. The improvement in activity is obtained without substantially sacrificing se... | 02/14/1989 |
| 4795846 | Process for the dehydrocyclization of aliphatic hydrocarbons An improved dehydrocyclization process for the selective conversion of light hydrocarbons to aromatics is presented. The activity of a catalyst containing nonacidic L-zeolite is greatly enhanced by the addition of water, water precursors, or mixtures ther... | 01/03/1989 |
| 4786625 | Dehydrogenation catalyst compositon A novel catalytic composite comprising a platinum group metal component; a modifier metal component selected from the group consisting of a tin component, germanium component, rhenium component and mixtures thereof; an optional alkali or alkaline earth me... | 11/22/1988 |
| 4720604 | Process for dehydrogenation of alkylaromatics Dehydrogenation catalyst compositions for alkylaromatics and dehydrogenation processes using such catalysts are provided. The catalyst compositions comprise a catalytically active iron compound, e.g., iron oxide; a potassium catalyst promoter, e.g., potas... | 01/19/1988 |
| 4695664 | Method of recovering heat from low temperature effluent The invention is an improved method and apparatus for recovering waste heat from a low temperature process stream by means of a vaporizable heat sink liquid, characterized by an effective lowering of the boiling temperature of the heat sink liquid without... | 09/22/1987 |
