Raymond T Cook

US Patent:

8058371, Nov 15, 2011

Filed:

Apr 7, 2008

Appl. No.:

12/098907

Inventors:

Patrick Brant - Seabrook TX, US
Gary L. Casty - Easton PA, US
Gabor Kiss - Hampton NJ, US
Raymond A. Cook - Bethlehem PA, US
James R. Lattner - LaPorte TX, US

Assignee:

Exxonmobil Chemical Patents Inc. - Houston TX

International Classification:

C08F 4/6592
C08F 2/06
C08F 110/06
C08F 210/06

US Classification:

526160, 526170, 526348, 526351

Abstract:

Processes for polymerizing propylene. About 40 wt % to about 80 wt % propylene monomer, based on total weight of propylene monomer and diluent, and about 20 wt % to about 60 wt % diluent, based on total weight of propylene monomer and diluent, can be fed into a reactor. The propylene monomer can be polymerized in the presence of a metallocene catalyst and an activator within the reactor at a temperature of about 80 C. or more and a pressure of about 13 MPa or more to produce a polymer product in a homogenous system. About 20 wt % to about 76 wt % (preferably About 28 wt % to about 76 wt %) propylene monomer, based on total weight of the propylene monomer, diluent, and polymer product, can be present at the reactor exit at steady state conditions.