Matches 51 - 100 out of 174 < 1 2 3 4 >
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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...
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...
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...
5698760 Olefin metathesis  
The present invention is a process for the production of a mixed C4 olefinic stream comprising primarily isobutene and butene-1, and propylene, said process comprising subjecting a mixed olefin...
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,...
5672802 Process for the preparation of alpha olefins  
This invention relates a process for the preparation of an alpha olefin product having a narrow molecular weight range which comprises metathesizing an internal olefin under non-equilibrium...
5519101 Process for preparation of unsaturated oligomers or polymers by acyclic olefin metathesis  
A polymerization process for preparation of oligomers and polymers having at least one internal carbon-to-carbon double bond and containing functional groups comprising terminal carbon-to-carbon...
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.
5449852 Process for the metathesis of olefins with an improved rhenium catalyst  
A process for the metathesis of olefins, wherein the olefins are reacted in contact with an improved catalyst comprising a niobium and/or tantalum compound and a rhenium compound on a porous...
5396014 Process for the preparation of 4,4-dimethyl-2-pentene  
1,1,2,3,4,4,6-Heptamethyl-1,2,3,4-tetrahydronaphthalene, a novel naphthalenic compound, is useful as an intermediate for the preparation of...
5352812 Metathesis of acyclic olefins using an iridium/silver catalyst composition  
The metathesis of functionalized and unfunctionalized acyclic olefins using catalyst compositions containing iridium and silver in a molar ration of 3 to 1.
5304692 Catalyst composition for disproportionation of olefins and process for disproportionation of olefins using the same  
A disproportionation catalyst for olefins and a process for disproportionation of olefins using said catalyst are disclosed. The catalyst is a mixture of one part by weight of a first catalyst...
5296437 Catalyst for metathesis reactions of olefines and a method for preparing it as well as the metathesis reaction concerned  
The invention relates to a catalyst to be utilized in the metathesis reactions of olefines, the catalyst comprising an after-treated tungsten complex containing diol ligands and hydrocarbon...
5264635 Selective cracking and etherification of olefins  
A selective alkene upgrading process wherein a mixture of intermediate molecular weight monoalkenes comprising at least one linear alkene component and at least one tertiary alkene component is...
5220089 Olefin upgrading by selective catalysis  
Olefins are converted to lower alkene hydrocarbon products, e.g., propene, butenes, and isoalkenes with zeolite MCM-22 catalyst. This catalytic conversion is particularly useful in the selective...
5191144 Olefin upgrading by selective conversion with synthetic mesoporous crystalline material  
In the process of olefin disproportionation, a feedstock containing predominatly mono-olefin the feedstock is charged at elevated temperature into a catalytic conversion zone in contact with...
5146033 Homogeneous rhenium catalysts for metathesis of olefins  
The invention pertains to rhenium (VII) compounds which are catalysts for metathesis of ordinary olefins (hydrocarbons) and functionalized olefins in a homogeneous phase and to methods of...
5134241 Multistage olefin upgrading process using synthetic mesoporous crystalline material  
A process for upgrading olefinic feedstocks containing lower olefins employing new synthetic catalyst of ultra-large pore crystalline material. The new crystalline material exhibits unusually large...
5099014 Demetallizing organometallic compounds using sulphuric acid-urea adducts  
Compositions containing sulfuric acid and one or more of certain chalcogen-containing compounds in which the chalcogen compound/H 2 SO 4 molar ratio is below 2 contain the mono-adduct of sulfuric...
5095165 Hydrocarbon lubricants containing polar groups  
The invention discloses that hydrocarbon lubricants containing olefinic unsaturation participate in an olefin metathesis reaction with alkenes containing polar functional groups to provide an...
5093540 Process for selectively converting linear paraffins to linear alpha olefins  
This invention relates to a two step process for converting linear paraffins to alpha olefins. The first step comprises contacting said paraffins with a catalyst comprising an oxide an alkali or...
5059733 Process for making 1-hexene and high octane blending components  
Disclosed is a process for preparing n-hexenes and high octane blending components from a mixture of C 6 olefin isomers. Also disclosed is a process for preparing 1-hexene from a mixture of C 6 ...
5059734 Process for selectively producing C5 to C18 straight chain α olefins  
Disclosed is a process for preparing C 5 to C 18 straight chain α-olefins from the corresponding internal olefins. The process comprises reacting a C 5 to C 18 straight chain olefin reactant...
5057636 Process for recovering N-hexenes from a mixture of C.sub.6 olefin isomers by oligomerizing the branched-chain C.sub.6 olefin isomers in the mixture using a moderate strength acid catlyst  
Processes are disclosed for recovering n-hexenes from a mixture comprising n-hexenes and at least one branched-chain C 6 olefin isomer by oligomerizing the branched-chain C 6 olefin isomers, but...
5057637 Process for producing C.sub.5 to C.sub.18 straight chain α-olefins from the corresponding internal olefins  
Disclosed is a process for preparing C 5 to C 18 straight chain α-olefins from the corresponding internal olefins. The process comprises reacting a C 5 C 18 straight chain olefin reactant with...
5057638 Process for making 1-hexene from 1-butene  
Disclosed is a process for preparing 1-hexene from 1-butene. The 1-butene is metathesized to produce 3-hexene which is then subjected to, e.g., an hydration/dehydration procedure to produce a...
5026936 Enhanced production of propylene from higher hydrocarbons  
The present invention provides a process for the preparation of propylene from C 4 or higher feed by a combination of cracking and metathesis wherein higher hydrocarbon is cracked to form ethylene...
5026935 Enhanced production of ethylene from higher hydrocarbons  
The present invention provides a process for the preparation of ethylene from C 4 or higher feed by a combination of cracking and metathesis wherein higher hydrocarbon is cracked to form ethylene...
4982038 Oxidative methylation of organic compounds  
A method for the oxidative methylation of propylene to ethylene and butenes, isobutylene to isoprene, toluene to styrene and enthylbenzene and acetonitrile to acrylonitrile utilizing a series of...
4962263 Disproportionation of olefins  
This invention relates to a process for disproportionation of hydrocarbon olefins by contacting said hydrocarbon at disproportionation conditions with a catalyst prepared by incorporating a metals...
4940827 Catalyst system for olefin disproportionation  
1. A catalyst system for olefin disproportionation containing molybdenum oxide supported on alumina prepared by a process which comprises: (a) comulling a gamma alumina providing agent with a...
4925822 Disproportionation catalyst and process  
This invention relates to a catalyst composition prepared by reacting in a hydrocarbon solvent a molybdenum or tungsten halide with siloxyalane selected from [(CH 3 CH 2 ) 2 AlO] 2 SiR 2 and...
4895997 Olefin isomerization process  
The disclosure of the invention relates to a process for double bond isomerization in which the double bond of an alpha olefinic molecule is moved from the alpha position to an internal position of...
4880520 Hydrocarbon conversion process using titanium-aluminum-phosphorus-silicon-oxide molecular sieves as catalyst  
Crystalline molecular sieves having three-dimensional microporous framework structures of TiO 2 , AlO 2 , SiO 2 and PO 2 tetrahedral units are disclosed. These molecular sieves have an empirical...
4837188 Catalytic systems having extended duration and conservation for the metathesis of olefins  
Improved catalytic systems of long active duration, comprising initially (a) a tungsten compound, (b) an organometallic compound and (c) a partially or totally fluorinated organic compound. Process...
4818442 Disproportionation process  
A process for the disproportionation of olefins comprising contacting said olefins under suitable reaction conditions with a neutral-carbene complex catalyst and then using anhydrous ammonia to...
4784746 Crude oil upgrading process  
A crude oil is upgraded by thermal treatment at a temperature of at least 400° C. under at least autogenous pressure and preferably from 100 to 1000 psig for about 20 to 30 minutes in order to...
4777310 Catalyzed olefin equlibration and separation of the equilibrated products  
A method for the selective gas-phase equilibration of at least one C 3 or greater monoalkene over a HAMS-1B crystalline borosilicate-based catalyst composition employing operating conditions in...
4754099 Disproportionation of olefins  
This invention relates to a process for disproportionation of hydrocarbon olefins by contacting said hydrocarbon at disproportionation conditions with a catalyst prepared by incorporating a metals...
4727215 Catalyst composition for effecting metathesis of olefins  
Compounds of the formula: M(NR 1 )(OR 2 ) 2 (CHR 3 ) wherein M is molybdenum or tungsten; R 1 and R 2 are alkyl, aryl, aralkyl or halogen-substituted derivatives or silicon-containing...
4709115 Disproportionation of alkenes  
A catalytic process for the disproportionation of alkenes in a distillation column reactor, whereby high conversion and selectivity are simultaneously achieved.
4676885 Selective process for the upgrading of distillate transportation fuel  
The invention disclosed herein comprises a process for the selective upgrading of combustion quality of a distillate transportation fuel by careful selective dehydrogenation, disproportionation and...
4654462 Metathesis of olefins with a catalyst based upon a tungsten complex  
Improved process of metathesis of olefins by contact of one or more olefins with a catalyst comprising a tungsten complex with two phenoxy groups, carrying substituents and four other ligands, the...
4613721 Small olefin interconversions  
The process for the interconversion of "small olefins" selected from the class consisting of ethylene, propylene, butenes and mixtures thereof comprising contacting said small olefin(s) with...
4609769 Olefin conversion  
Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst comprising a silica support containing tungsten oxide and a promoting amount of at least...
4605810 Allene or alkyne treatment of olefin conversion catalysts  
Process for activation of tungsten on silica disproportionation catalyst by contacting the catalyst with at least one acetylenic compound is disclosed. In a specific embodiment, the acetylenic...
4556753 Process for producing isobutene  
A process for producing isobutene, comprising contacting, at elevated temperatures, a feed containing propylene with a catalyst comprising a crystalline silica polymorph of the silicalite type in...
4436949 Olefin conversion process  
A novel process for the conversion of olefins is provided by adding water to said olefin and thereafter contacting said olefin with an acidic alumina catalyst under conditions sufficient to effect...
4435606 Process for the preparation of linear olefins from triethylaluminum and tripropylaluminum via growth, isomerization and metathesis  
Internal olefins are subjected to metathesis closely coupled after an isomerization reaction to obtain desired molecular weight range linear olefins. Specific process steps and separation...
Matches 51 - 100 out of 174 < 1 2 3 4 >