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7608745 |
Process for production of propylene and ethylbenzene from dilute ethylene streams
A process for producing propylene is provided which includes directing an ethylene stream from an ethylene reaction zone to a propylene reaction zone; directing a butene stream to the propylene...
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7586018 |
Oxygenate conversion to olefins with dimerization and metathesis
A processing scheme and system for enhanced light olefin production, particularly for increased relative yield of propylene, involves oxygenate conversion to olefins and subsequent oxygenate...
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7563358 |
Process for the production of benzene, toluene, and xylenes
A hydrocarbon conversion process for producing an aromatics product containing of benzene, toluene, xylenes, or mixtures thereof. The process is carried out by converting precursors of benzene,...
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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...
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7459593 |
Metathesis unit pretreatment process with formation of octene
Disclosed is a process for integrating a butene dimerization process with a metathesis process to remove isobutene from the feed stream to the metathesis reactor. The isobutene is preferentially...
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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...
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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...
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7154013 |
Olefin metathesis
A process in which tetramethylethylene and neohexene are produced by starting with butene in a distillation column reactor to produce a product containing ethylene, diisobutene,...
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7151199 |
Hydrocarbon conversion processes using non-zeolitic molecular sieve catalysts
Hydrocarbon or oxygenate conversion process in which a feedstock is contacted with a non zeolitic molecular sieve which has been treated to remove most, if not all, of the halogen contained in the...
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7094898 |
Ruthenium compounds, their production and use
A new class of compounds is disclosed that in preferred embodiments relate to Ru-based catalysts suitable for use in olefin metathesis reactions. Such compounds demonstrate high rates of catalytic...
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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...
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6967256 |
Formation of enediynes by reductive coupling followed by alkyne metathesis
One aspect of the present invention relates to methods of preparing enedialkylidyne complexes, enediynes, and alkyne metathesis catalysts, as well as methods of catalyzing alkyne metathesis...
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6906234 |
Continuous method and heat pump device for enriching liquid low-concentrated reaction mixtures
A continuous method and a heat pump device for enrichment of low-concentrated reaction mixtures resulting from the production of cycloalkanedienes by means of catalytic metathesis of cyclic...
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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,...
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6881323 |
Hydrocarbon conversion using zeolite SSZ-54
The present invention relates to new crystalline zeolite SSZ-54 prepared using a templating agent comprising N-isopropyl ethylenediamine, or a mixture of 1-N-isopropyl diethylenetriamine and...
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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...
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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.
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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...
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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...
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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...
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6660813 |
Solid state metathesis chemistry
An in-situ method for performing organic metathesis polymer chemistry in the solid state includes the step of providing an organic monomer and a catalyst, the catalyst for driving a metathesis...
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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...
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6590048 |
Highly active cationic ruthenium and osmium complexes for olefin metathesis reactions
The present invention describes the use of cationic vinylidene, allenylidene and higher cumulenylidene complexes of ruthenium or osmium as catalysts or catalyst precursors for olefin metathesis...
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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...
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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...
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6562230 |
Synthesis of narrow lube cuts from Fischer-Tropsch products
A process for preparing hydrocarbons in the lube base oil range, lube base oils and lube oil compositions from a fraction with an average molecular weight above a target molecular weight and a...
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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...
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6518469 |
Process for improved yields of higher molecular weight olefins from lower molecular weight olefins
A process for improved yields of heavier olefins from a substantially narrow range of lighter hydrocarbon feed stock containing olefins in a reaction distillation column comprising feeding a narrow...
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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...
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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...
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6420619 |
Cracked gas processing and conversion for propylene production
The C 3 to C 6 cut from a cracking process containing propylene, butane, 1-butene, 2-butene and acetylenic and diene components including butadiene are preferentially converted to propylene. The...
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6369286 |
Conversion of syngas from Fischer-Tropsch products via olefin metathesis
A process for preparing distillate fuel compositions from a C 2-6 olefinic fraction and a C 20 + fraction via molecular averaging is described. The fractions can be obtained, for example, from...
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6358482 |
Facility for the production of isobutene and propylene from hydrocarbon cuts containing four carbon atoms
A facility for converting an olefinic C 4 cut to isobutene and propylene comprising, in succession: 1) a zone 1 for selective hydrogenation of olefins in the olefinic C4 cut with simultaneous...
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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...
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6313365 |
Ruthenium metathesis catalyst and method for producing olefin reaction product by metathesis reaction using the same
The invention has an object of safely and simply preparing a large amount of a ruthenium metathesis catalyst, which is used as a catalyst for a carbon-carbon bond formation using, particularly, a...
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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...
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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...
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6268542 |
Multi-phase alkylation-transalkylation process
A process for the production of ethylbenzene by the alkylation of benzene over a molecular sieve aromatic alkylation catalyst followed by transalkylation of polyalkylated aromatic components and...
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6225359 |
Process for conversion of natural gas and associated light hydrocarbons to salable products
Salable hydrocarbon products prepared by reacting a light hydrocarbon gaseous stream with a gaseous oxidant to produce carbon oxides and hydrogen, which is contacted in a hydrocarbon synthesis zone...
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6207115 |
Process and plant for the conversion of olefinic C4 cuts to polyisobutene and to propylene
The present invention concerns a process for the conversion of an olefinic C 4 cut to polyisobutene and to propylene by metathesis. The process comprises three successive steps: (1) selective...
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6075173 |
Process for production of isobutene and propylene from hydrocarbon cuts containing four carbon atoms
The present invention concerns a process for the production of isobutene and propylene by metathesis of an olefinic C 4 cut. The process comprises three successive steps: 1) selective...
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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...
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5976356 |
Acid treated zeolite containing boron and silver used as a catalyst for converting hydrocarbons and a method of making and using such catalyst
A novel zeolite catalyst comprising an acid treated zeolite impregnated with silver and boron, a method of making such zeolite catalyst, and the use thereof for converting paraffin hydrocarbons to...
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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...
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5922863 |
Diene cyclization using ruthenium and osmium carbene complexes
Disclosed are ruthenium and osmium carbene compounds which are stable in the presence of a variety of functional groups and which can be used to catalyze olefin metathesis reactions on unstrained...
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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...
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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...
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5750815 |
Olefin metathesis coupling using ruthenium and osmium carbene complexes
Disclosed are ruthenium and osmium carbene compounds which are stable in the presence of a variety of functional groups and which can be used to catalyze olefin metathesis reactions on unstrained...
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5747408 |
Supported catalysts containing rhenium and aluminium, preparation thereof and use thereof for the metathesis of olefins
The present invention concerns new catalysts based on compounds containing both rhenium and aluminum, which are deposited on an organic or inorganic support. The compounds of rhenium and aluminum...
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5710298 |
Method of preparing ruthenium and osmium carbene complexes
Methods of preparing carbene compounds of the formula ##STR1## are disclosed wherein M is Os or Ru; R and R 1 are independently selected from hydrogen and a functional group selected from the...
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