摘要:
A proces for regenerating a spent catalyst comprising uranium and a poly-substituted cyclopentadienyl ligand comprising contacting the deactivated catalyst with hydrogen under reaction conditions. The regenerated catalyst is active in the selective dimerization of propylene to 4-methyl-1-pentene.
摘要:
1-Butenes are selectively produced via the dimerization of 1-olefins in the presence of novel organotantalum catalysts comprising tantalum and a silyl-substituted cyclopentadienyl moiety having the formula C.sub.5 H.sub.5-x (SiR.sup.6.sub.3).sub.x, wherein each R.sup.6 may be the same or different and is hydrogen, alkyl, cycloalkyl, aryl, aralkyl or alkoxy, and x is an integer from 1 to 5.
摘要:
This invention relates to a process for dimerizing an alpha olefin to a vinylidene olefin which comprises contacting said alpha olefin with a catalyst comprising (a) cyclo(pentadienyl)zirconium or hafnium metallocene and (b) an aluminoxane wherein the atom ratio of Al to Zr or Hf in the catalyst ranges from about 1 to about 100.
摘要:
Tantalum catalysts or catalyst precursors of the formula ##STR1## wherein X is a halide, or alkoxide and L is an alkene (CH.sub.2 .dbd.CHR) having from 2 to 20 carbon atoms, react with 1-olefins to give catalysts of the formula ##STR2## wherein R.sup.2 is hydrogen or a C.sub.1 to C.sub.18 alkyl such as methyl, ethyl, or propyl. The catalysts or catalyst precursors selectively dimerize 1-olefins to the two possible disubstituted .alpha.-olefin dimers, the ratio of which depends on the nature of R.
摘要:
Process for the oligomerisation of ethylene to give a high proportion of C.sub.4 -C.sub.8 oligomers of which a high proportion (>80%) are .alpha.-olefins, using, as catalyst a Group VIII metal hydrocarbyl compound supported on an inorganic oxide which has surface hydroxyl groups with which the compound will react. Nickel is the preferred Group VIII metal.
摘要:
THIS INVENTON RELATES TO NEW CATALYST COMPOSITIONS WHICH MAY BE USED FOR POLYMERIZING UNSATURATED COMPOUNDS. THEY COMPRISE A FLUORIDE OF A GROUP V-A, V-B OR VI-B ELEMENT TOGETHER WITH A NICKEL ORGANO COMPOUND, FOR EXAMPLE A ZEROVALENT NICKEL COMPOUND, A NICKEL-PHOSPHINE COMPLEX, A RR-ALLYL NICKEL COMPLEX OR A CYCLOPENTADIENYL NICKEL COMPLEX.
摘要:
9-CARBOXYMETHYL-9-PHOSPHABICYCLONONANES AND ALKALI METAL SALTS THEREOF, USEFUL AS LIGANDS OF ORGANOMETALLIC OLEFIN OLIGOMERIZATION CATALYSTS, ARE PRODUCED BY THE DIRECT CONDENSATION OF THE SEC-PHOSPHINE 9-PHOSPHABICYCLONONANE AND A HALOACETIC ACID.
摘要:
A METHOD FOR DIMERIZING A LOWER ALPHA OLEFIN, SAID METHOD COMPRISING CONTACTING THE LOWER ALPHA OLEFIN WITH A CATALYTIC AMOUNT OF A COMPLEX HAVING THE FORMULA R2PD2CL4, WHERE R REPRESENTS A LOWER ALPHA OLEFIN MOLECULE, IN A REACTION MEDIUM SELECTED FROM THE GROUP CONSISTING OF; (I) CHLOROFORM CONTAINING A SMALL AMOUNT OF WATER OR A LOWER MONOHYDRIC ALCOHOL; (II) ANISOLE; (III) METHYLENE CHLORIDE; (IV) NITROBENZENE; AND (V) NITROETHANE, AT ABOUT 0-50*C., UNDER A PRESSURE OF ABOUT 1-2000 ATMOSPHERE ABSOLUTE, FOR ABOUT 0.5-100 HOURS, AND SEPARATING AND RECOVERING THE DIMERIZED OLEFIN.
摘要:
Olefines such as mono-olefines and diolefines or mixtures thereof may be oligomerized using p -allyl metal compounds or p -allyl metal halides wherein the metal is a transition metal of Groups IV-VIII. Lewis acids such as organoaluminium compounds and aluminium halides, and Lewis bases such as (a) the alkyl, cycloalkyl, aralkyl or aryl compounds of elements of Group V other than nitrogen, (b) the tri-alkyl, -cycloalkyl, -aralkyl or -aryl esters of elements of Group V other than nitrogen, as well as their triamides and (e) dialkyl sulphoxides may be added. In the examples, butadiene, ethylene, propylene and butene-2 are separately oligomerized, mostly to dimers; also butene-2 and ethylene; ethylene and propylene; and ethylene and cyclohexene are codimerized.ALSO:Olefines such as mono-olefines and diolefines may be polymerized using p -allyl metal compounds or p -allyl metal halides wherein the metal is from Group IVa to VIIa or VIII of the specified Periodic System. Lewis acids such as organo aluminium compounds or aluminium halides and Lewis bases such as (a) the alkyl, cycloalkyl, aralkyl or aryl compounds of elements of Group V other than nitrogen, (b) the tri-alkyl, -cycloalkyl, -aralkyl or -aryl esters of elements of Group V other than nitrogen, as well as their triamides and (c) dialkyl sulphoxides, may also be present. In the examples:-(1) ethylene is polymerized using tris-p -allyl chromium, bis-p -allyl chromium iodide or bisp -allyl chromium chloride; (2) butadiene is polymerized using tetra-p -allyl chromium, tris-p -allyl-vanadium, p -allyl-nickel chloride and ethyl aluminium dichloride, tris-p -allyl chromium, tris-p -allyl cobalt, bis-p -allyl cobalt iodide and ethyl aluminium dichloride, bis-p -allyl cobalt iodide and aluminium bromide, bis-p -allyl cobalt chloride and diethyl aluminium chloride or ethyl aluminium dichloride, p -allyl cobalt diiodide, triphenyl phosphine and aluminium bromide; (3) propylene is polymerized using vanadium tetrachloride and p -allyl-magnesium chloride and (4) isoprene is polymerized using p -allyl nickel chloride and ethyl aluminium dichloride.ALSO:Catalysts for the oligomerization and polymerization of olefines comprise p -allyl compounds of metals or p -allyl metal halides wherein the metal is from Group IVA to VIIA or VIII of the specified Periodic System together with a Lewis acid and/or a Lewis base. The Lewis acids may be organoaluminium compounds or aluminium halides and the Lewis bases may be (a) the alkyl, cycloalkyl, aralkyl or aryl compounds of Group V elements other than nitrogen, (b) the tri-alkyl, -cycloalkyl, -aralkyl or-aryl esters of Group V elements other than nitrogen, as well as their triamides and (c) dialkyl sulphoxides. Many examples are given, the p -allyl compounds or halides used being tris-p -allyl chromium, bis-p -allyl chromium iodide, bis-p -allyl-chromium chloride, tris-p -allyl cobalt, bis-p -allyl cobalt iodide, bis-p -allyl cobalt chloride, p -allyl cobalt di-iodide, p -cyclooctatrienyl-nickel chloride, p -cyclo-octenyl nickel chloride, p -allyl-nickel iodide, p -allyl magnesium chloride, p -pineneyl-nickel bromide, p -allyl nickel bromide, p -crotyl nickel iodide, p -cinanmyl nickel chloride; 1, 2, 3-triphenyl-p -cyclopropenyl nickel bromide; p -allyl palladium chloride, p -allyl nickel chloride, tetra-p -allyl zirconium, tris-p -allyl vanadium and C12 H19 NiCl.
摘要:
Olefines such as mono-olefines and diolefines or mixtures thereof may be oligomerized using p -allyl metal compounds or p -allyl metal halides wherein the metal is a transition metal of Groups IV-VIII. Lewis acids such as organoaluminium compounds and aluminium halides, and Lewis bases such as (a) the alkyl, cycloalkyl, aralkyl or aryl compounds of elements of Group V other than nitrogen, (b) the tri-alkyl, -cycloalkyl, -aralkyl or -aryl esters of elements of Group V other than nitrogen, as well as their triamides and (e) dialkyl sulphoxides may be added. In the examples, butadiene, ethylene, propylene and butene-2 are separately oligomerized, mostly to dimers; also butene-2 and ethylene; ethylene and propylene; and ethylene and cyclohexene are codimerized.ALSO:Olefines such as mono-olefines and diolefines may be polymerized using p -allyl metal compounds or p -allyl metal halides wherein the metal is from Group IVa to VIIa or VIII of the specified Periodic System. Lewis acids such as organo aluminium compounds or aluminium halides and Lewis bases such as (a) the alkyl, cycloalkyl, aralkyl or aryl compounds of elements of Group V other than nitrogen, (b) the tri-alkyl, -cycloalkyl, -aralkyl or -aryl esters of elements of Group V other than nitrogen, as well as their triamides and (c) dialkyl sulphoxides, may also be present. In the examples:-(1) ethylene is polymerized using tris-p -allyl chromium, bis-p -allyl chromium iodide or bisp -allyl chromium chloride; (2) butadiene is polymerized using tetra-p -allyl chromium, tris-p -allyl-vanadium, p -allyl-nickel chloride and ethyl aluminium dichloride, tris-p -allyl chromium, tris-p -allyl cobalt, bis-p -allyl cobalt iodide and ethyl aluminium dichloride, bis-p -allyl cobalt iodide and aluminium bromide, bis-p -allyl cobalt chloride and diethyl aluminium chloride or ethyl aluminium dichloride, p -allyl cobalt diiodide, triphenyl phosphine and aluminium bromide; (3) propylene is polymerized using vanadium tetrachloride and p -allyl-magnesium chloride and (4) isoprene is polymerized using p -allyl nickel chloride and ethyl aluminium dichloride.ALSO:Catalysts for the oligomerization and polymerization of olefines comprise p -allyl compounds of metals or p -allyl metal halides wherein the metal is from Group IVA to VIIA or VIII of the specified Periodic System together with a Lewis acid and/or a Lewis base. The Lewis acids may be organoaluminium compounds or aluminium halides and the Lewis bases may be (a) the alkyl, cycloalkyl, aralkyl or aryl compounds of Group V elements other than nitrogen, (b) the tri-alkyl, -cycloalkyl, -aralkyl or-aryl esters of Group V elements other than nitrogen, as well as their triamides and (c) dialkyl sulphoxides. Many examples are given, the p -allyl compounds or halides used being tris-p -allyl chromium, bis-p -allyl chromium iodide, bis-p -allyl-chromium chloride, tris-p -allyl cobalt, bis-p -allyl cobalt iodide, bis-p -allyl cobalt chloride, p -allyl cobalt di-iodide, p -cyclooctatrienyl-nickel chloride, p -cyclo-octenyl nickel chloride, p -allyl-nickel iodide, p -allyl magnesium chloride, p -pineneyl-nickel bromide, p -allyl nickel bromide, p -crotyl nickel iodide, p -cinanmyl nickel chloride; 1, 2, 3-triphenyl-p -cyclopropenyl nickel bromide; p -allyl palladium chloride, p -allyl nickel chloride, tetra-p -allyl zirconium, tris-p -allyl vanadium and C12 H19 NiCl.