Methods for making alpha olefin oligomers and polyalphaolefins include a step of contacting a C.sub.4 to C.sub.20 alpha olefin monomer and a catalyst system containing a metallocene, a first activator comprising a solid oxide chemically-treated with an electron withdrawing anion, and a second activator comprising an organoaluminum compound. The alpha olefin oligomers and polyalphaolefins prepared with these catalyst systems can have a high viscosity index combined with a low pour point, making them particularly useful in lubricant compositions and as viscosity modifiers.

Methods for making alpha olefin oligomers and polyalphaolefins include a step of contacting a C.sub.4 to C.sub.20 alpha olefin monomer and a catalyst system containing a metallocene, a first activator comprising a solid oxide chemically-treated with an electron withdrawing anion, and a second activator comprising an organoaluminum compound. The alpha olefin oligomers and polyalphaolefins prepared with these catalyst systems can have a high viscosity index combined with a low pour point, making them particularly useful in lubricant compositions and as viscosity modifiers.

Catalyst systems and methods for making and using the same. A method for making a catalyst support includes forming a mixture of a support material and a fluoride donor. The mixture is added to a fluidized bed reactor. The mixture is fluidized to form a fluidized bed with a height to diameter ratio of at least about 2.3. The mixture is calcined to decompose the fluoride donor, forming a fluorinated support.

A dehydrochlorination process is disclosed. The process involves contacting R.sub.fCHClCH.sub.2Cl with a chromium oxyfluoride catalyst in a reaction zone to produce a product mixture comprising R.sub.fCCl═CH.sub.2, wherein R.sub.f is a perfluorinated alkyl group.

A dehydrochlorination process is disclosed. The process involves contacting R.sub.fCHClCH.sub.2Cl with a chromium oxyfluoride catalyst in a reaction zone to produce a product mixture comprising R.sub.fCCl═CH.sub.2, wherein R.sub.f is a perfluorinated alkyl group.

A catalyst comprising one or more metal oxides, wherein the catalyst has a total pore volume equal to or greater than 0.3 cm.sup.3/g and a mean pore diameter greater than or equal to 90 Å, where in the pore volume is measured using N.sub.2 adsorption porosimetry and the mean pore diameter is measured using N.sub.2 BET adsorption porosimetry.

A catalyst comprising one or more metal oxides, wherein the catalyst has a total pore volume equal to or greater than 0.3 cm.sup.3/g and a mean pore diameter greater than or equal to 90 Å, where in the pore volume is measured using N.sub.2 adsorption porosimetry and the mean pore diameter is measured using N.sub.2 BET adsorption porosimetry.

A process for the manufacture of a catalyst comprising a fluorinated metal oxide is provided. A catalyst comprising a fluorinated metal oxide is provided. A catalytic hydrogenation process is also provided.

A process for the manufacture of a catalyst comprising a fluorinated metal oxide is provided. A catalyst comprising a fluorinated metal oxide is provided. A catalytic hydrogenation process is also provided.

Disclosed is a method for producing a photocatalyst for air cleaning. The present production method comprises the steps of: preparing titanium dioxide (TiO.sub.2); attaching platinum to a surface of the titanium dioxide; and attaching fluoro to the platinum-attached surface of the titanium dioxide to obtain surface-modified titanium dioxide.