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7601881 Isomerization catalyst and process  
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...
7576251 Process for the double bond hydroisomerization of butenes  
A process is disclosed for the preferential conversion to 2-butene of a stream containing C4 compounds including 1-butene and 2-butene. The process involves mixing the C4 stream with a first...
7550638 Integrated cracking and metathesis process  
An integrated method that comprises a hydrocarbon thermal cracking operation to form at least one olefin product, coupled with dimerization and metathesis operations, the dimerization operation...
7371917 Preparation of olefins by metathesis over a carbide or oxycarbide of a transition metal  
Process for preparing a compound having a nonaromatic C—C double or triple bond (compound A) from another compound or a mixture of other compounds having a nonaromatic C—C double or triple bond...
7220888 Method for producing hydrocarbons having a modified carbon skeleton  
The invention relates to a method for producing hydrocarbons having a modified carbon skeleton by reacting aliphatic hydrocarbons a) with themselves, b) with another aliphatic hydrocarbon or c)...
7220886 Olefin metathesis  
A process for the production of propylene from the metathesis of ethylene and 2-butene is disclosed wherein a mixed C 4 stream is first treated to enrich and separate the 2-butene from 1-butene...
7214841 Processing C4 olefin streams for the maximum production of propylene  
In order to maximize the production of propylene when the external supply of ethylene is limited, the C 4 cut from a hydrocarbon cracking process is first subjected to autometathesis prior to any...
7145050 Modified supported metathesis catalysts  
The invention relates to modified supported catalysts based on Re 2 O 7 /γ-Al 2 O 3 for use in the preparation of cycloalkadienes in a metathesis reaction, a process for preparing cycloalkadienes...
7041864 Linear and branched olefin production from cyclic olefin feedstocks  
Ring opening cross metathesis of secondary non-cyclic hydrocarbons with cyclic unsaturated hydrocarbons having 8 carbon atoms or more to produce corresponding unsaturated product hydrocarbons...
6916966 Process for preparing cycloalkadienes  
The present invention relates to a process for preparing cycloalkadienes using supported catalysts based on Re 2 O 7 /γ-Al 2 O 3 and also to the use of the resulting cycloalkadienes for the...
6884917 1-butene production  
A method for forming high purity 1-butene wherein a feed composed of pentenes and hexenes is subjected to metathesis with ethylene to form a mixture containing propylene, 1-butene, 2-butenes,...
6872862 Propylene production  
A method for making propylene from alpha olefins, internal linear olefins and isoolefins wherein the alpha olefins are subjected to a combination of hydrogenation and double bond isomerization to...
6852900 Method for carrying out a metathesis reaction of unsaturated organic compounds  
The present invention relates to a process for the metathesis reaction of unsaturated organic compounds.
6844479 Alkylation process  
A process for the alkylation of paraffins with olefins includes contacting the paraffin with the olefin under alkylation conditions with a zeolite having an AAI number of at least about 1.0. In a...
6777582 Process for producing propylene and hexene from C4 olefin streams  
A C 3 to C 6 hydrogen cut from a cracking unit is processed for the conversion of olefins to propylene and hexene via autometathesis. The autometathesis of a mixed normal butenes feed in the...
6727396 Process for the production of linear alpha olefins and ethylene  
Ethylene and hexene-1 are produced from butene-1 by metathesis of butene-1 and isomerization of the hexene-3 produced therein to hexene-1. The initial starting material is a mixed butene stream...
6686510 Production of high-purity isobutene and propylene from hydrocarbon fractions with four carbon atoms  
A process for production, from an olefinic C 4 fraction, on the one hand, of high-purity isobutene and, on the other hand, of propylene by metathesis is described. The process comprises three...
6677495 Oligomer mixtures derived from cyclopentene; method for the production and use thereof  
A process for preparing cyclopentene oligomer mixtures of the formula I comprises reacting in a homogeneously or heterogeneously catalyzed metathesis reaction a hydrocarbon mixture which...
6646172 Preparation of propene  
A multistage process for preparing propene, in which the first stage is the reaction of 1-butene, 2-butene and isobutene to give propene, 2-pentene and 2-methyl-2-butene in the presence of a...
6639116 Simplified methods of making 1,3-cyclohexadiene  
Novel condensation reactions used to produce 1,3-cyclohexadiene. Such a compound is an important precursor in the manufacture of high performance plastics, as one example, are provided. In the...
6632765 Catalyst regeneration via reduction with hydrogen  
Methods of regenerating a coked catalyst by treatment with a hydrogen-containing gas, where the coke is not removed from the catalyst via combustion with an oxygen-containing gas, are disclosed....
6624338 Rhenium-and caesium-based metathesis catalyst and a process for converting C4 olefinic cuts by metathesis  
The present invention provides a catalyst and a process for metathesis of olefinic C 4 cuts. The catalyst contains rhenium, caesium and delta alumina. The preferred catalyst contains at least one...
6586649 Production of propylene  
The invention provides a process for the production of propylene by butene metathesis. The process includes contacting a feedstock, which contains butene selected from 1-butene, 2-butene and...
6583329 Olefin metathesis in a distillation column reactor  
The metathesis process is carried out in a reaction distillation column for: (A) for the production of propylene from the metathesis of 2-butene and ethylene; (B) for the production of detergent...
6580009 Flexible preparation of propene and hexene  
The process for preparing propene and hexene from a raffinate II feed stream comprising olefinic C 4 -hydrocarbons comprises a) a metathesis reaction in which butenes present in the feed stream...
6566568 Molecular averaging of light and heavy hydrocarbons  
A process for preparing a paraffinic product stream in the gasoline, middle distillate fuel and lube ranges from a C 2-5 -containing feedstock and a C 20 + paraffinic feedstock is described. The...
6538168 Preparation of C5-/C6-olefins  
A process for preparing C 5 /C 6 -olefins from an olefinic starting stream comprising C 4 -hydrocarbons comprises a) carrying out a metathesis reaction in the presence of a metathesis catalyst so...
6515193 Process for production of higher linear internal olefins from butene  
A process for production of higher linear internal olefins from 1- and 2-butene feedstocks in one or a series of sequential catalytic reactive distillation columns containing olefin...
6441263 Ethylene manufacture by use of molecular redistribution on feedstock C3-5 components  
A process for preparing an ethylene-rich composition from a C 3-5 paraffinic feedstock is described. The C 3-5 paraffinic feedstock is subjected to molecular redistribution via dehydrogenation to...
6437209 Process for metathesis of olefins in the presence of a stabilizing agent of the catalyst  
Catalytic process for metathesis of olefins in the presence of a catalyst and a stabilizing agent that is injected into the reaction medium. Application in particular to rebalancing between one...
6346652 Asymmetric ring-closing metathesis reactions involving achiral and meso substrates  
A composition and method for the catalytic conversion of a racemic mixture of dienes to a cyclic olefin by a ring-closing metathesis (RCM) reaction are disclosed. The composition, a transition...
6284939 Process for liquid-phase conversion with a moving-bed catalyst using a stripper-lift  
This invention pertains to a continuous catalytic process, for example, for the metathesis of olefins that uses a catalyst circulating in a moving bed in at least one reaction zone operating in the...
6281402 Alternated process for olefin metathesis  
The present invention relates to a process for continuous metathesis or disproportionation of olefins, comprising at least 2 phases, a reaction phase a) carried out in a zone comprising at least...
6235958 Process for converting C5 olefinic cuts by metathesis using a catalyst based on rhenium and cesium  
The present invention provides a process for converting olefinic C 5 cuts by metathesis using an improved catalyst containing rhenium, cesium, and delta alumina. The preferred catalysts contains...
6166279 Preparation of olefins  
The preparation of olefins from steam cracker or refinery C 4 streams is carried out by selective hydrogenation of butadienes and acetylenic impurities in the steam cracker or refinery C 4 ...
6130181 Metathesis catalyst, and its preparation and use  
A catalyst containing Re 2 O 7 on an inorganic support, wherein the Re 2 O 7 component is on the support in the form of Re 2 O 7 particles having a diameter of <1 nm, the rhenium surface...
5990369 Process for producing light olefins  
The present invention relates to a process for the production of light olefins comprising olefins having from 2 to 4 carbon atoms per molecule from an oxygenate feedstock. The process comprises...
5942653 Metathesis process for treating unsaturated hydrocarbons  
A process for treating unsaturated hydrocarbons comprises subjecting an unsaturated hydrocarbon component to metathesis in the presence of a catalyst system comprising silica, alumina and an alkyl...
5905055 Heterogeneous metathesis catalyst  
The invention relates to a heterogeneous metathesis catalyst containing a support, a metal compound chosen from the group consisting of tungsten, rhenium and molybdenum, and a promoter, the...
5898091 Process and plant for the conversion of olefinic C.sub.4 and C.sub.5 cuts to an ether and to propylene  
For the conversion of an olefinic C 4 or C 5 cut to an alkyl-tertiobutylether or alkyl-tertioamylether and to propylene, by metathesis, the process comprises four successive steps: (1) selective...
5898092 Supported catalyst containing rhenium and aluminum process for the preparation thereof and use for the metathesis of olefins  
A supported catalyst with rhenium and also containing aluminium introduced by a compound of the formula (OR) qAlR ' r with R being a hydrocarbyl residue with from 1 to 40 carbon atoms, R' being an...
5877379 Olefin conversion process involving coke suppressor impregnated catalyst  
A composition and an olefin conversion process are disclosed. The composition comprises a zeolite having incorporated therein a coke-suppressing amount of a coke suppressor selected from the group...
5840816 Method of manufacturing a polysiloxane charge transporting material  
The invention provides a method for manufacturing a polysiloxane resin with charge transporting property by uniformly dissolving a charge transporting material to a practical concentration in a...
5747409 Catalytic compositions based on compounds of rhenium and aluminium, preparation thereof and use thereof for the metathesis of olefins  
The present invention concerns new catalytic compositions containing at least one compound of rhenium and aluminium corresponding to the general formula: O 3 Re--O-- Al(OR)(L) x --O! n --ReO 3 ...
5712357 Method for metathetically preparing sulphur containing polymers or organic compounds  
A process for the preparation of organic compounds or polymers containing one or more sulphur atoms and including one or more double bonds in a hydrocarbon chain is described. An acyclic...
5698761 Coordination catalyst systems  
The invention relates to the use of cyclic organometallic compounds as components in coordination catalyst systems, to corresponding coordination catalyst systems and also to processes for the...
5675051 Catalytic composition and olefin disproportion process  
The invention concerns a catalytic olefin disproportion (also known as metathesis) process wherein the catalyst produced by dissolving a tungsten and/or molybdenum compound, more particularly a...
5672803 Method for making trans non-conjugated diolefins  
A method is provided for selectively producing a trans-geometrical isomer of non-conjugated diolefins. The method comprises treating a starting non-conjugated diolefin isomer or mixture of isomers,...
5596115 Compounds of rhenium and aluminium, preparation thereof and use thereof as catalysts  
The present invention concerns new compounds of rhenium and aluminum corresponding to the general formula: O 3 Re--O--[Al(OR)(L) x --O] n --ReO 3 in which R is a hydrocarbyl residue, for...
5516953 Process for the preparation of optically active cycloolefins  
A process for the preparation of optically active cycloolefins based upon reaction of optically active dienes in the presence of catalyst compositions comprising molybdenum and tungsten complexes.
Matches 1 - 50 out of 143 1 2 3 >