A method for preparing a high viscosity index poly-α-olefin subjects α-olefin to a polymerization reaction in the presence of a metallocene catalyst to obtain a poly-α-olefin. The polymerization reaction is carried out in the absence of a solvent, and the metallocene catalyst is formed of, or is formed by interaction between, a metallocene compound and an activator.

The present invention relates to a process for the preparation of a polyethylene wax, the process comprising the steps of providing a catalyst solution, wherein the catalyst solution comprises at least one activating compound, an alkylaluminoxane and a me-tallocene complex, wherein the molar ratio of the activating compound to aluminum comprised in the alkylaluminoxane is from 0.0005 to 0.20; and polymerizing ethylene, by contacting the ethylene and the catalyst solution.

The present invention relates to a process for the preparation of a polyethylene wax, the process comprising the steps of providing a catalyst solution, wherein the catalyst solution comprises at least one activating compound, an alkylaluminoxane and a me-tallocene complex, wherein the molar ratio of the activating compound to aluminum comprised in the alkylaluminoxane is from 0.0005 to 0.20; and polymerizing ethylene, by contacting the ethylene and the catalyst solution.

The present disclosure generally relates to process to produce a poly alpha-olefin (PAO), comprising: a) introducing a first alpha-olefin to a first catalyst system comprising non-aromatic hydrocarbon soluble activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions, wherein the first alpha-olefin is preferably introduced to the reactor at a flow rate of about 100 g/hr or more, to form a first reactor effluent comprising PAO (such as at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more); and b) introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition comprising an acid catalyst, such as BF.sub.3, in a second reactor to form a second reactor effluent comprising PAO trimer.

The present disclosure generally relates to process to produce a poly alpha-olefin (PAO), comprising: a) introducing a first alpha-olefin to a first catalyst system comprising non-aromatic hydrocarbon soluble activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions, wherein the first alpha-olefin is preferably introduced to the reactor at a flow rate of about 100 g/hr or more, to form a first reactor effluent comprising PAO (such as at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more); and b) introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition comprising an acid catalyst, such as BF.sub.3, in a second reactor to form a second reactor effluent comprising PAO trimer.

Catalyst systems for tetramerizing ethylene to form 1-octene may include a catalyst which may include a chromium compound coordinated with a ligand and a co-catalyst which may include an organoaluminum compound. The ligand may have a chemical structure according to Chemical Structure (I), wherein R.sub.5, R.sub.6, and R.sub.7 are each independently chosen from a (C.sub.1-C.sub.50) hydrocarbyl group or a (C.sub.1-C.sub.50) heterohydrocarbyl group, and wherein the (C.sub.1-C.sub.50) hydrocarbyl or (C.sub.1-C.sub.50) heterohydrocarbyl groups of R.sub.5, R.sub.6, and R.sub.7 have greater than 10 carbon atoms combined and R.sub.A, R.sub.B, R.sub.C, and R.sub.D and R.sub.1, R.sub.2, R.sub.3, and R.sub.4, are independently chosen from a hydrogen atom or a (C.sub.1-C.sub.50) hydrocarbyl group.

Catalyst systems for tetramerizing ethylene to form 1-octene may include a catalyst which may include a chromium compound coordinated with a ligand and a co-catalyst which may include an organoaluminum compound. The ligand may have a chemical structure according to Chemical Structure (I), wherein R.sub.5, R.sub.6, and R.sub.7 are each independently chosen from a (C.sub.1-C.sub.50) hydrocarbyl group or a (C.sub.1-C.sub.50) heterohydrocarbyl group, and wherein the (C.sub.1-C.sub.50) hydrocarbyl or (C.sub.1-C.sub.50) heterohydrocarbyl groups of R.sub.5, R.sub.6, and R.sub.7 have greater than 10 carbon atoms combined and R.sub.A, R.sub.B, R.sub.C, and R.sub.D and R.sub.1, R.sub.2, R.sub.3, and R.sub.4, are independently chosen from a hydrogen atom or a (C.sub.1-C.sub.50) hydrocarbyl group.

Catalyst systems for tetramerizing ethylene to form 1-octene may include a catalyst which may include a chromium compound coordinated with a ligand and a co-catalyst which may include an organoaluminum compound. The ligand may have a chemical structure according to Chemical Structure (I), wherein R.sub.5, R.sub.6, and R.sub.7 are each independently chosen from a (C.sub.1-C.sub.50) hydrocarbyl group or a (C.sub.1-C.sub.50) heterohydrocarbyl group, and wherein the (C.sub.1-C.sub.50) hydrocarbyl or (C.sub.1-C.sub.50) heterohydrocarbyl groups of R.sub.5, R.sub.6, and R.sub.7 have greater than 10 carbon atoms combined and R.sub.A, R.sub.B, R.sub.C, and R.sub.D and R.sub.1, R.sub.2, R.sub.3, and R.sub.4, are independently chosen from a hydrogen atom or a (C.sub.1-C.sub.50) hydrocarbyl group.

Catalyst systems for tetramerizing ethylene to form 1-octene may include a catalyst which may include a chromium compound coordinated with a ligand and a co-catalyst which may include an organoaluminum compound. The ligand may have a chemical structure according to Chemical Structure (I), wherein R.sub.5 is a (C.sub.1-C.sub.15) alkyl group, a (C.sub.3-C.sub.15) cyclohydrocarbyl group, a (C.sub.3-C.sub.15) cycloheterohydrocarbyl group, or a (C.sub.1-C.sub.15) aryl group, and R.sub.A, R.sub.B, R.sub.C, R.sub.D, R.sub.E, R.sub.F, R.sub.G, R.sub.H, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.6, R.sub.7, R.sub.8, and R.sub.9 are independently chosen from a hydrogen atom, a (C.sub.1-C.sub.50) hydrocarbyl group, or a (C.sub.1-C.sub.50) heterohydrocarbyl group.

Catalyst systems for tetramerizing ethylene to form 1-octene may include a catalyst which may include a chromium compound coordinated with a ligand and a co-catalyst which may include an organoaluminum compound. The ligand may have a chemical structure according to Chemical Structure (I), wherein R.sub.5 is a (C.sub.1-C.sub.15) alkyl group, a (C.sub.3-C.sub.15) cyclohydrocarbyl group, a (C.sub.3-C.sub.15) cycloheterohydrocarbyl group, or a (C.sub.1-C.sub.15) aryl group, and R.sub.A, R.sub.B, R.sub.C, R.sub.D, R.sub.E, R.sub.F, R.sub.G, R.sub.H, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.6, R.sub.7, R.sub.8, and R.sub.9 are independently chosen from a hydrogen atom, a (C.sub.1-C.sub.50) hydrocarbyl group, or a (C.sub.1-C.sub.50) heterohydrocarbyl group.