Abstract: The process of the invention comprises contacting a lower olefin contaminated with an impurity such as a diene at oligomerization conditions with either a mixture of oligomerization catalyst and at least one of a methathesis catalyst and an alkaline earth oxide, or precontacting the contaminated lower olefin with methathesis catalyst, optionally combined with alkaline earth oxide, and subsequently oligomerizing the lower olefin.

Abstract: Crystalline molecular sieves having three-dimensional microporous framework structure of MO.sub.2, AlO.sub.2, and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis are expressed by the formula:mR: (M.sub.x Al.sub.y P.sub.z)O.sub.2wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present per mole of (M.sub.x Al.sub.y P.sub.z)O.sub.2 ; "M" represents at least two elements capable of forming framework tetrahedral oxides and selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium; and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is disclosed. The catalyst is useful in the cracking and hydrocracking of various hydrocarbonaceous feeds.

Abstract: 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 solution containing cobalt and an element selected from the group consisting of molybdenum and tungsten into an alumina hydrogel. The final calcined catalysts have surface areas greater than about 300 m.sup.2 /g and more than about 40% of their pore volume in pores having diameters less than about 50 .ANG..

Abstract: Catalyst composition is provided which is prepared by impregnating high surface area, high pore volume alumina with at least one magnesium compound convertible to the oxide, and, optionally, at least one alkali metal compound which is convertible to the oxide, and/or at least one zirconium compound convertible to the oxide, then subjecting the impregnated support to an oxygen-containing atmosphere under conditions suitable to convert at least a portion of the magnesium, alkali metal and zirconium compounds to the oxide form. The resulting catalyst is an effective double bond isomerization catalyst, and also greatly enhances the disproportionation activity of disproportionation catalysts when used in combination therewith.

Abstract: A process for preparing alpha-olefins is provided which comprises:(a) converting a feed containing one or more lower olefins in the presence of a medium pore crystalline silicate zeolite catalyst under reaction conditions providing a mixture of higher olefinic products;(b) contacting at least a part of the mixture of higher olefinic products resulting from step (a) with an alpha-olefin in the presence of a metathesis catalyst under olefin metathesis conditions to provide a mixture of alpha-olefins having a different carbon number than the feed olefin;(c) separating the alpha-olefin product of step (b) into at least two fractions, one fraction containing predominantly lower alpha-olefin hydrocarbons and the other fraction containing predominantly higher alpha-olefin hydrocarbons; and,(d) recycling at least a part of the lower alpha-olefin hydrocarbon fraction resulting from step (c) as feed for step (a).

Abstract: 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 complex carrying as coordination groups a halogen atom, an alkyl radical and a carbene. The catalyst preferably is of the formula ##STR1## where X is halogen, R is hydrocarbon or an electronegative group or atom, R.sup.1 is alkyl and R.sup.2 and R.sup.3 are individually hydrogen or alkyl groups.

Abstract: Method for the production of high cis content 1,5,9-tetradecatriene is provided which comprises disproportionating 1,5-cyclooctadiene and 1-hexene in the presence of a catalyst consisting essentially of molybdenum oxide on a high purity, high surface area, high pore volume silica support. The resulting high cis content 1,5,9-tetradecatriene is a useful precursor for the preparation of gossyplure, a known insect sex attractant.

Abstract: 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 one titaniferous agent and activated under conditions suitable for the titaniferous agent to promote the activity of tungsten oxide and silica for the disproportionation and isomerization reaction.

Abstract: 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 compound can be prepared by isomerization of an allene compound when contacted with magnesium oxide, either as a separate catalyst bed, or as part of the disproportionation catalyst system.

Abstract: 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 a least one titaniferous agent and activated under conditions suitable for the titaniferous agent to promote the activity of tungsten oxide and silica for the disproportionation and isomerization reaction.

Abstract: A process for disproportionation of olefins is disclosed employing a novel catalyst comprising a silica support treated with an oxide or oxide precursor of tungsten and a Group I oxide or compound convertible to the oxide in admixture with a double bond isomerization catalyst.

Abstract: An improved olefin disproportionation catalyst produced by contacting an inorganic refractory oxide containing a catalytic amount of molybdenum oxide with a promoting amount of at least one elemental metal selected from the group consisting of barium and magnesium.

Abstract: Titanium-containing molecular sieves are disclosed having use as molecular sieves and as catalyst compositions in hydrocarbon conversion and other processes. The instant invention employs novel titanium-containing molecular sieves comprising titanium, aluminum, phosphorus and oxygen and are generally employable in hydrocarbon conversion processes, including cracking, hydrocracking and hydrotreating.

Abstract: Improved catalyst for the metathesis of olefins comprising a compound of W with a halogen and with a phenoxy group which can carry substituents. It contains 4 halogen atoms and 2 phenoxy groups per atom of W. Preferably, the phenoxy group is halogenated. This catalyst allows the more rapid carrying out of various types of metathesis reactions, when it is used as a co-catalyst in conjunction with organo-metallic compounds, particularly Al or Sn. Among others, it allows the economical preparation of pheromones. It is practically insensitive to traces of water and oxygen.

Abstract: Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst comprising a silica support containing molybdenum oxide and a promoting amount of a least one titaniferous agent and activated under conditions suitable for the titaniferous agent to promote the activity of molybdenum oxide and silica for the disproportionation and isomerization reaction.

Abstract: The disproportionation/skeletal isomerization of olefins can be carried out with high conversions and selectivity in the presence of catalyst compositions containing Group IIA and at least one of Group VIB and rhenium components.

Abstract: An improved olefin disproportionation catalyst produced by contacting an inorganic refractory oxide containing a catalytic amount of tungsten oxide or molybdenum oxide with a promoting amount of at least one elemental metal selected from zinc and manganese.

Abstract: Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst comprising an inorganic refractory oxide support containing at least one of tungsten oxide and molybdenum oxide and a promoting amount of at least one methylating agent under conditions suitable for the methylating agent compounds to promote the activity of tungsten and molybdenum oxides for the disproportionation reaction.

Abstract: A catalyst containing tungsten, potassium, and bismuth on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst comprising an inorganic refractory material containing at least one of tungsten oxide and molybdenum oxide and a promoting amount of at least one treating agent selected from chlorinated silicon compounds, thionyl chloride, and sulfuryl chloride under conditions suitable for the treating agent to promote the activity of tungsten and molybdenum oxides for the disproportionation reaction.

Abstract: Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst comprising silica containing tungsten oxide and a promoting amount of silver under conditions suitable for silver to promote the activity of tungsten oxide for the disproportionation reaction.

Abstract: A catalyst containing tungsten, iridium, and an alkali or alkaline earth component, preferably potassium, on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: An improved olefin disproportionation catalyst produced by contacting an inorganic refractory oxide containing a catalytic amount of tungsten oxide or molybdenum oxide with a promoting amount of at least one elemental metal selected from zinc and manganese.

Abstract: An improved olefin disproportionation catalyst produced by contacting (a) molybdenum or tungsten oxide supported on inorganic refractory oxide, and (b) a metal dithionite.

Abstract: A process for the disproportionation of olefins involving the use of a catalyst comprising rhenium oxide and thorium phosphate and oxygen in the feed.

Abstract: Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst produced by combining a metal, such as tungsten or a tungsten compound, with a halosilane by adding either water or silica to the suspension of metal and halosilane and then heating to activate the catalyst.

Abstract: A supported tungsten oxide or supported molybdenum oxide is treated with elemental tungsten, silicon or antimony. The composition is useful as a metathesis catalyst.

Abstract: Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst produced by contacting an inorganic refractory oxide support containing rhenium oxide with a promoting amount of at least one aluminum alkyl and, optionally, at least one tin alkyl compound under conditions suitable for aluminum and tin alkyl compounds to promote the activity of the rhenium oxide for the disproportionation reaction.

Abstract: A catalyst containing tungsten, antimony and an alkali or alkaline earth component on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A catalyst containing tungsten, cobalt, and an alkali or alkaline earth component on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A catalyst containing tungsten, iridium, and an alkali or alkaline earth component, preferably potassium, on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A catalyst containing tungsten, potassium, and bismuth on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A catalyst containing tungsten, copper, and an alkali or alkaline earth component on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A catalyst containing tungsten, an alkali or alkaline earth component, and iron on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: In an olefin disproportionation reaction, the formation of undesirable polymer is inhibited by the inclusion of a small amount of carbon monoxide in the feed.

Abstract: Disproportionation of olefinic hydrocarbons by contact with a catalyst comprising a dicarbonyl(cyclopentadienyl)nitrosyl complex of molybdenum or tungsten and an alkylaluminum halide co-catalyst.

Abstract: A catalyst containing tungsten, lead, and an alkali or alkaline earth component on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: A catalyst containing tungsten, antimony and an alkali or alkaline earth component on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.

Abstract: Process for the preparation of dienes and/or trienes comprising reacting a polyolefinically unsaturated compound in the presence of a heterogeneous disproportionation catalyst with a compound according to the general formula ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl, aryl, alkaryl or aralkyl group which may or may not contain one or more inert substituents or R.sup.1 and R.sup.2 form part of a cyclic structure together with the carbon atom to which they are attached. Isononadiene (2,6-dimethyl-1,5-heptadiene) and/or 2,6,10-trimethyl-1,5,9-undecatriene can be obtained by reacting cis-1,4-polyisoprene with isobutene in the presence of a heterogeneous disproportionation catalyst.

Abstract: The present invention relates to a process for the disproportionation of n-olefins comprising contacting the olefin feed with a catalyst composition comprising molybdenum oxide or tungsten oxide supported on silica. The catalyst composition is produced by impregnating a silica support with an alcoholic solution of a halide of a metal selected from molybdenum and tungsten, removing the alcoholic solvent by evaporation, and heat treating the impregnated support at an elevated temperature such that (a) the metal halide is converted to the corresponding oxide and/or an oxy-salt and (b) the halogen content thereof is reduced to less than 0.1% by weight of the total composition. By using a catalyst produced by this method, it is possible to carry out the process so as to selectively produce linear higher olefins.

Abstract: A novel disproportionation catalyst comprising the product resulting from the combination of elemental sulfur and a disproportionation catalyst consisting essentially of a refractory oxide containing molybdenum oxide or tungsten oxide.

Abstract: Polymeric catalysts containing groups of the general formula: [--(C.sub.5 R.sub.4)Me(CO).sub.x L.sub.y ].sub.z, wherein (C.sub.5 R.sub.4) is a sustituted or unsubstituted cyclopentadiene group; Me is a transition metal; and L is alkyl or aryl phosphine, alkyl phosphite, nitrosyl, allyl, SnCl.sub.3, halogen or hydrogen. Such groups are bound to polymeric carriers such as polystyrene-based copolymers, silica gel or silicate glass. Processes for preparing such catalysts and methods for their use are also disclosed.

Abstract: A process for the conversion of at least one olefinic organic compound by disproportionation, proportionation, and/or isomerization, in which an olefin conversion catalyst is exposed to electromagnetic radiation prior to and/or during contact of the organic compound with the catalyst. The catalyst may also be pretreated with ethylene, propylene and/or butene during exposure to radiation or the olefinic compound may be pretreated by contact with magnesium oxide while exposing the magnesium oxide to radiation.

Abstract: A process for forming non-polymeric disproportionation products of non-conjugated olefins using catalysts comprising (1) at least one of certain neutral carbene complexes, and (2) at least one of certain compounds of Groups IVa, IVb, Vb, VIb, VIIb, VIII, and Ib of the Periodic Table of the Elements.

Abstract: The disproportionation of olefins is effected by contacting the olefin with an activator and a catalyst comprising an ion exchange resin and an organic linking compound having at least one resin-compatible moiety ionically bonded to said resin and further having at least one metal complexible moiety selected from the group consisting of trivalent nitrogen, trivalent phosphorus, trivalent arsenic, trivalent bismuth and trivalent antimony complexed to a metal selected from the group consisting of molybdenum, tungsten and rhenium.

Abstract: A process and a catalyst for the disproportionation of olefins is disclosed wherein the catalyst consists essentially of (1) at least one neutral tungsten carbene complex, (2) at least one halogenated promoter, and (3) at least one tin promoter.

Abstract: Double bond isomerization and disproportionation of olefins is obtained by contact with a catalyst in a single-stage composition containing a support, uranium, and at least one of tungsten, molybdenum, or rhenium.