James L Swecker

US Patent:

20040138391, Jul 15, 2004

Filed:

Nov 17, 2003

Appl. No.:

10/716041

Inventors:

Ian Burdett - Charleston WV, US
Ping Cai - Hurricane WV, US
Ronald Eisinger - Charleston WV, US
Mark Goode - Hurricane WV, US
F. Hussein - Cross Lanes WV, US
Michael Kinnan - Charleston WV, US
Michael Muhle - Kingwood TX, US
James Swecker - Hurricane WV, US

International Classification:

C08F002/00

US Classification:

526/088000, 526/901000, 526/090000, 526/170000

Abstract:

This invention relates to processes for transitioning among polymerization catalyst systems, preferably catalyst systems, which are incompatible with each other. Particularly, the invention relates to processes for transitioning among olefin polymerization reactions utilizing Ziegler-Natta catalyst systems, metallocene catalyst systems and chromium-based catalyst systems.

US Patent:

20110237855, Sep 29, 2011

Filed:

Nov 24, 2008

Appl. No.:

12/744245

Inventors:

Randall L. Force - Charleston WV, US
James L. Swecker - Clendenin WV, US
Kevin D. Roy - Charleston WV, US

Assignee:

UNIVATION TECHNOLOGIES, LLC - Houston TX

International Classification:

C07C 7/00
B01D 19/00
F25J 3/08

US Classification:

585800, 95263, 95259, 62618

Abstract:

Systems and methods for removing a volatile catalyst poison from a liquid hydrocarbon are provided. In one embodiment, a process vent () can be introduced to a vent recovery system () to provide a recycle gas (). A first portion of the recycle gas () and a liquid hydrocarbon () can be introduced to a stripper column () to provide a stripper vent gas () and a degassed liquid hydrocarbon () that can be introduced to a polymerization process.