JOHN S JENKINS
Accountancy at Maccorkle Ave, Charleston, WV
License number
West Virginia WV004135
Category
Accountant
Type
Certified Public Accountant
Address
Address
3510 Maccorkle Ave SE, Charleston, WV 25304
Professional information
Process For Controlled Polymerization Of Stereospecific Alpha-Olefins Having Preselected Isotacticity
US Patent:
4956426, Sep 11, 1990
Filed:
Jul 24, 1986
Appl. No.:
6/889799
Inventors:
George G. Ardell - South Charleston WV
Reginald W. Geck - Victoria TX
John M. Jenkins - South Charleston WV
William G. Sheard - South Charleston WV
Reginald W. Geck - Victoria TX
John M. Jenkins - South Charleston WV
William G. Sheard - South Charleston WV
Assignee:
Union Carbide Chemicals and Plastics Company Inc. - Danbury CT
International Classification:
C08F 234, C08F 1006
US Classification:
526 60
Abstract:
A method and system for regulating the isotacticity of polypropylene in a continuous process for manufacturing polypropylene by the polymerization of alpha-olefins in a fluidized bed reactor system using a model which correlates isotacticity values to catalyst productivity values. A catalyst productivity target value is computed using the model based upon a selected xylene solubles or isotactic index. The instantaneous catalyst productivity of the system is then determined by dividing product production rate by catalyst flow rate which is then compared to the catalyst productivity target value. When the comparison between the instantaneous catalyst productivity value and the catalyst productivity differ the molar feed ratio of SCA to alkyl is automatically adjusted until the catalyst productivity, and hence isotacticity, is changed approaching the target values.
Fluidized Bed Reaction Systems
US Patent:
4543399, Sep 24, 1985
Filed:
Apr 3, 1984
Appl. No.:
6/594962
Inventors:
John M. Jenkins - South Charleston WV
Russell L. Jones - South Charleston WV
Thomas M. Jones - Dunbar WV
Russell L. Jones - South Charleston WV
Thomas M. Jones - Dunbar WV
Assignee:
Union Carbide Corporation - Danbury CT
International Classification:
C08F 234
US Classification:
526 70
Abstract:
A process is described for increasing the space time yield of polymer production in a fluidized bed reactor employing an exothermic polymerization reaction by cooling the recycle stream to below its dew point and returning the resultant two-phase fluid stream to the reactor to maintain the fluidized bed at a desired temperature above the dew point of the recycle stream.
Process For Reducing Sheeting During Polymerization Of Alpha-Olefins
US Patent:
4876320, Oct 24, 1989
Filed:
Sep 20, 1988
Appl. No.:
7/246623
Inventors:
Bernard D. Fulks - Victoria TX
Steven P. Sawin - Charleston WV
Collin D. Aikman - Charleston WV
John M. Jenkins - South Charleston WV
Steven P. Sawin - Charleston WV
Collin D. Aikman - Charleston WV
John M. Jenkins - South Charleston WV
Assignee:
Union Carbide Chemicals and Plastics Company Inc. - Danbury CT
International Classification:
G08F 234
US Classification:
526 62
Abstract:
A process for reducing sheeting during production of polyolefins by polymerization of alpha-olefins utilizing titanium based polymerization catalysts wherein the static electric charges in the reactor at the side of possible sheet formation are maintained below static voltage levels which would otherwise cause sheet formation.
Process For Reducing Sheeting During Polymerization Of Alpha-Olefins
US Patent:
4792592, Dec 20, 1988
Filed:
May 6, 1985
Appl. No.:
6/730958
Inventors:
Bernard D. Fulks - Victoria TX
Steven P. Sawin - Charleston WV
Collin D. Aikman - Charleston WV
John M. Jenkins - South Charleston WV
Steven P. Sawin - Charleston WV
Collin D. Aikman - Charleston WV
John M. Jenkins - South Charleston WV
Assignee:
Union Carbide Corporation - Danbury CT
International Classification:
C08F 234
US Classification:
526 62
Abstract:
A process for reducing sheeting during production of polyolefins by polymerization of alpha-olefins utilizing titanium based polymerization catalysts wherein the static electric charges in the reactor at the site of possible sheet formation are maintained below static voltage levels which would otherwise cause sheet formation.
Method For Detecting Solidification In A Mixed Phase Container
US Patent:
4371977, Feb 1, 1983
Filed:
Jun 17, 1980
Appl. No.:
6/160288
Inventors:
John M. Jenkins - South Charleston WV
Max E. Carter - Victoria TX
Michael L. Green - Scott Depot WV
Marvin E. Cavender - Victoria TX
Max E. Carter - Victoria TX
Michael L. Green - Scott Depot WV
Marvin E. Cavender - Victoria TX
Assignee:
Union Carbide Corporation - Danbury CT
International Classification:
G01N 2300
US Classification:
378 51
Abstract:
A method for detecting solidification in a mixed phase low pressure fluidized bed olefin polymerization reactor having volume comprising:
A. disposing a radiation source and a radiation detector such that radiation from said radiation source will pass through a radiation path through at least a portion of the volume of said container to reach said radiation detector,
B. detecting solidification in said radiation path by noting a decrease in the amount of radiation reaching said radiation detector.
Process For Reducing Sheeting During Polymerization Of Alpha-Olefins
US Patent:
4532311, Jul 30, 1985
Filed:
Sep 14, 1984
Appl. No.:
6/650571
Inventors:
Bernard D. Fulks - Victoria TX
Steven P. Sawin - Charleston WV
Collin D. Aikman - Charleston WV
John M. Jenkins - South Charleston WV
Steven P. Sawin - Charleston WV
Collin D. Aikman - Charleston WV
John M. Jenkins - South Charleston WV
Assignee:
Union Carbide Corporation - Danbury CT
International Classification:
C08F 234
US Classification:
526 62
Abstract:
A process for reducing sheeting during production of polyolefins by polymerization of alpha-olefins utilizing titanium based polymerization catalysts wherein the static electric charges in the reactor at the site of possible sheet formation are maintained below static voltage levels which would otherwise cause sheet formation.