Carl Henry Thomas

US Patent:

7307257, Dec 11, 2007

Filed:

Dec 20, 2002

Appl. No.:

10/499794

Inventors:

Robert L. Long - Houston TX, US
Stephen K. Morgan - Deham Springs LA, US
Carl J. Thomas - Baton Rouge LA, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

G01N 21/00

US Classification:

25033909

Abstract:

The invention is a method and apparatus for on-line measurement of polymer properties such as moisture content, ethylene content, Epoxidized Soy Bean Oil (ESBO) content, calcium stearate content and ethylidene norbornene (ENB) content.

US Patent:

20080042064, Feb 21, 2008

Filed:

Jul 18, 2007

Appl. No.:

11/879629

Inventors:

Robert Long - Houston TX, US
Stephen Morgan - Denham Springs LA, US
Carl Thomas - Baton Rouge LA, US
Oscar Broussard - Baton Rouge LA, US

International Classification:

G01N 21/00

US Classification:

250339090

Abstract:

The invention is a method and apparatus for on-line measurement of polymer properties such as moisture content, ethylene content, Epoxidized Soy Bean Oil (ESBO) content, calcium stearate content and ethylidene norbornene (ENB) content.

US Patent:

60725761, Jun 6, 2000

Filed:

Dec 8, 1997

Appl. No.:

8/986971

Inventors:

Michael F. McDonald - Kingwood TX
Robert L. Long - Houston TX
Carl J. Thomas - Baton Rouge LA

Assignee:

Exxon Chemical Patents Inc. - Houston TX

International Classification:

G01J 342
G01J 344
G01N 2135

US Classification:

356300

Abstract:

A process plant for the manufacture of halobutyl rubber is provided with online monitoring and control of the process parameters to control the properties of the product. It incorporates an in-situ measurement system that does not require the removal of any sample material from the process. It uses a Fourier Transform Near Infrared (FTNIR) spectrometer, fiber-optic cables, a viscometer for measuring solution viscosity and a Resistance Temperature Device (RTD) for temperature measurement. An online real-time analyzer system using a Constrained Principal Spectral Analysis program predicts the property of the polymer product and provides the process control system with analysis of the data using derived relationships between the physical properties of the polymer and these spectral measurements and the measured values of fluid viscosity and temperature. Differences between the predicted and desired property of the product are used to control process parameters. The method can be used for a variety of chemical process plants.