Robert A Santana

US Patent:

6995109, Feb 7, 2006

Filed:

Oct 3, 2002

Appl. No.:

10/492444

Inventors:

Robert I. Mink - Tarrytown NY, US
Thomas E. Nowlin - West Windsor NJ, US
Kenneth G. Schurzky - Bridgewater NJ, US
Pradeep P. Shirodkar - Kingwood TX, US
Robert L. Santana - Baytown TX, US

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

B01J 31/00
B01J 37/00
C08F 4/02
C08F 4/60

US Classification:

502103, 502104, 502115, 502150

Abstract:

Methods of preparing bimetallic catalysts are disclosed. The methods include the steps of providing a supported non-metallocene catalyst, contacting a slurry of the supported non-metallocene catalyst in a non-polar hydrocarbon with a solution of a metallocene compound and an alumoxane, and drying the contact product to obtain a supported bimetallic catalyst. The supported non-metallocene catalyst is prepared by dehydrating a particulate support material at a temperature of greater than 600 C. , preparing a slurry of the dehydrated support in a non-polar hydrocarbon, contacting the slurry with an organomagnesium compound and an alcohol, contacting the resulting slurry with a non-metallocene compound of a Group 4 or Group 5 transition metal, and drying the contact product to obtain a supported non-metallocene catalyst as a free-flowing powder. The bimetallic catalysts show increased activity relative to catalysts prepared using support materials dehydrated at lower temperatures.

US Patent:

20050003950, Jan 6, 2005

Filed:

Oct 3, 2002

Appl. No.:

10/495252

Inventors:

Robert Mink - Tarrytown NY, US
Thomas Nowlin - West Windsor NJ, US
Kenneth Schurzky - Bridgewater NJ, US
Robert Santana - Baytown TX, US
Pradeep Shirodkar - Kingwood TX, US

International Classification:

B01J031/00

US Classification:

502102000, 502103000, 502117000, 502115000

Abstract:

Methods of making mixed Ziegler-Natta/metallocene catalysts are disclosed. The methods include slurrying a dehydrated support in a hydrocarbon solvent, adding a dialkylmagnesium compound, then adding a non-metallocene group 4 or 5 metal compound, followed by adding a metallocene, an alumoxane, and optionally an aklyl aluminum compound and an electron donor compound, followed by drying the product. The alumoxane is added in an aromatic solvent.