The present invention relates to a method for preparing a cocatalyst compound using an anhydrous hydrocarbon solvent, and a cocatalyst compound prepared thereby.

Provided is a process for hydrogenolysis of a polymer that includes providing in a reactor the polymer, hydrogen gas and a supported organometallic catalyst. The supported organometallic catalyst formed from an organometallic complex precatalyst and an acidic metal oxide support. The polymer is reacted with the supported organometallic catalyst in the presence of the hydrogen gas at a predetermined temperature in the reactor to produce a reduced polymer product having a weight average molecular weight less than the polymer.

Provided are industrial processes for producing an organic acid alky ester from a feedstock containing organic acids and/or saponifiables, comprising: countercurrently contacting a feedstock with an organic alkylating reagent over two or more vessels or stages at temperature between 100 C. and 400 C. and pressure between 0.1 barg and 355 barg while simultaneously removing water and/or glycerin with unreacted alkylating reagent from the final vessel or stage to result in a first reaction method product containing organic acid alkyl esters, followed by a choice of using the alkyl esters as-is, purifying the organic acid alkyl esters from the first reaction product mixture or subjecting the first reaction product mixture to an additional transesterification reaction to convert saponifiables into additional organic acid alkyl esters, then purifying the organic acid alkyl esters from this second reaction method product.

The present invention provides a borylimide catalyst and further relates to compositions comprising the borylimide catalysts and processes for the polymerisation of olefins (e.g. ethylene) using the borylimide catalysts or the compositions comprising the borylimide catalysts.

Provided are industrial processes for producing an organic acid alky ester from a feedstock containing organic acids and/or saponifiables, comprising: countercurrently contacting a feedstock with an organic alkylating reagent over two or more vessels or stages at temperature between 100 C. and 400 C. and pressure between 0.1 barg and 355 barg while simultaneously removing water and/or glycerin with unreacted alkylating reagent from the final vessel or stage to result in a first reaction method product containing organic acid alkyl esters, followed by a choice of using the alkyl esters as-is, purifying the organic acid alkyl esters from the first reaction product mixture or subjecting the first reaction product mixture to an additional transesterification reaction to convert saponifiables into additional organic acid alkyl esters, then purifying the organic acid alkyl esters from this second reaction method product.

A method of making a morphology-improved polyethylene powder, the method comprising: contacting ethylene with a reactive olefin prepolymer in a gas phase reactor to make a morphology-improved polyethylene powder via gas phase polymerization; wherein the reactive olefin prepolymer comprises a component that is a polyolefin and a component that is an active metallocene derivative of a spray-dried silica-supported metallocene catalyst; wherein the reactive olefin prepolymer has a prepolymer/catalyst weight/weight ratio from 10:1.0 to 50:1.0, wherein the prepolymer weight is the total weight of the reactive olefin prepolymer and the catalyst weight is the weight of the spray-dried silica-supported metallocene catalyst.

Disclosed are ansa-metallocene catalysts for the production of polyethylenes. The subject metallocenes comprise a fluorenyl ligand linked to a substituted cyclopentadienyl or indenyl ligand by a one-atom bridge, wherein the cyclopentadienyl or indenyl ligand includes a silyl substituent of the formula SiR.sup.5R.sup.6R.sup.7, wherein R.sup.5 and R.sup.6 are selected independently from a C.sub.1-C.sub.20 hydrocarbyl, R.sup.7 is selected from a C.sub.2-C.sub.20 hydrocarbyl. The presence of a C.sub.2+ hydrocarbyl group on the silyl moiety may provide one or more unexpected features such as high polymerization activities, high comonomer incorporation efficiencies (CIE), low levels of long-chain branching (LCB), and a reverse Short-chain Branching Distribution profile over the molecular weight distribution. Combinations of these properties can provide excellent resin processability, clarity, strength, and other desirable properties, especially for films.