James R Madden

Author:

James J. Madden

ISBN #:

0821808044

Author:

James J. Madden

ISBN #:

3540664602

Author:

James Madden

ISBN #:

0787971634

Author:

James Madden

ISBN #:

0787976105

Author:

James F. Madden

ISBN #:

0137698283

Author:

James F. Madden

ISBN #:

0843732040

Author:

James F. Madden

ISBN #:

0843734116

Author:

James F. Madden

ISBN #:

0843774002

US Patent:

7601783, Oct 13, 2009

Filed:

Apr 5, 2005

Appl. No.:

11/099328

Inventors:

Mark B. Davis - Hurricane WV, US
James Daniel Madden - Pocatello ID, US

Assignee:

Dow Global Technologies, Inc. - Midland MI

International Classification:

C08L 23/00
C08L 23/04

US Classification:

525191, 525240

Abstract:

A method of making polyolefin with a target melt flow index and melt flow rate is disclosed. The method polymerizes one or more olefinic monomers in a single reactor containing a bicomponent catalyst system. The catalyst system includes a first catalyst component and a second catalyst component each characterized by a catalyst productivity and a chain-transfer-agent response. The single reactor has a chain-transfer-agent concentration and a temperature. The productivity of the second catalyst component is substantially different temperature dependent than that of the first catalyst component. The chain-transfer-agent response of the second catalyst component is substantially different sensitive than that of the first catalyst component. The temperature of the reactor is adjusted so that the melt flow ratio approaches the target value. The chain transfer agent concentration in the reactor is adjusted so that the melt index approaches the target value.

US Patent:

20020031451, Mar 14, 2002

Filed:

Sep 4, 2001

Appl. No.:

09/946001

Inventors:

Thomas Spriggs - Cross Lanes WV, US
James Riley - Luling LA, US
James Madden - Charleston WV, US
George Schwarz - Charleston WV, US
Mark Goode - Hurricane WV, US

International Classification:

B01J008/18
B01L007/00

US Classification:

422/131000, 422/139000, 422/143000, 422/234000, 422/109000, 422/138000

Abstract:

A falling film of water is applied around the periphery of a fluid bed olefin polymerization reactor to cool the wall and reduce the temperature in the fluid bed near the inside surface of the wall. Cooling has the effect of reducing static in the reactor, which in turn ameliorates a sheeting problem and can enhance production by facilitating control of the relation of the reactor temperature and the dew point of recycled gas. The process may be used concurrently with a gas cooling and condensing recycle system wherein at least some of the condensed recycle gas is injected in the vicinity of the internal wall surface.

US Patent:

63004291, Oct 9, 2001

Filed:

Dec 31, 1998

Appl. No.:

9/224181

Inventors:

Thomas Edward Spriggs - Cross Lanes WV
James Laurence Riley - Luling LA
James Daniel Madden - Charleston WV
George William Schwarz - Charleston WV
Mark Gregory Goode - Hurricane WV

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C08F 200

US Classification:

526 62

Abstract:

A falling film of water is applied around the periphery of a fluid bed olefin polymerization reactor to cool the wall and reduce the temperature in the fluid bed near the inside surface of the wall. Cooling has the effect of reducing static in the reactor, which in turn ameliorates a sheeting problem and can enhance production by facilitating control of the relation of the reactor temperature and the dew point of recycled gas. The process may be used concurrently with a gas cooling and condensing recycle system wherein at least some of the condensed recycle gas is injected in the vicinity of the internal wall surface.

US Patent:

61842990, Feb 6, 2001

Filed:

Mar 31, 1999

Appl. No.:

9/282654

Inventors:

James Daniel Madden - Charleston WV
Michael William Tilston - St. Albans WV

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C08F25100
C08F25300
C08F25500

US Classification:

525242

Abstract:

A process comprising contacting ethylene and at least one alpha-olefin comonomer having with a transition metal based catalyst system in two fluidized bed reactors connected in series, in the gas phase, under polymerization conditions, with the proviso that a hydrocarbyl aluminum cocatalyst is introduced into the first reactor and a different hydrocarbyl aluminum cocatalyst or no cocatalyst is introduced into the second reactor.