Russell I Clinton

US Patent:

41336402, Jan 9, 1979

Filed:

Feb 16, 1978

Appl. No.:

5/878500

Inventors:

Russell M. Clinton - Houston TX
A. Allilee Taylor - Mont Belvieu TX
Jimmy W. Brown - Dayton TX

Assignee:

Gulf Oil Corporation - Pittsburgh PA

International Classification:

G01N 2502
G01N 3108

US Classification:

23230PC

Abstract:

Apparatus is provided for the chromatographic analysis of a plurality of samples having volatile components present in a nonvolatile matrix. The apparatus includes as its principal elements: (a) an oven, (b) A sample cylinder mounted in the oven, which cylinder includes an entry port external of the oven for admitting and withdrawing sample boats from the cylinder, (c) A chromatographic analysis column mounted in the oven, (d) A detector element for analyzing the outlet gas of the analysis column, (e) Two chromatographic trap columns external of the oven, (f) A first gas line for feeding a first carrier gas through the sample cylinder and one of the trap columns, (g) A second gas line mounted in the oven for feeding a second inert carrier gas through one of the trap columns and the analysis column, and (h) A valve assembly having two fixed operating positions which feed the two carrier gases in reversed flow through different trap columns when changed from one operating position to the other.

US Patent:

55203299, May 28, 1996

Filed:

Apr 1, 1994

Appl. No.:

8/221812

Inventors:

Russell M. Clinton - Humble TX
William P. Jones - Baytown TX
Mark A. Roffman - Crosby TX

Assignee:

Chevron Research and Technology Company, a Division of Chevron U.S.A.
Inc. - San Francisco CA

International Classification:

G01K 300

US Classification:

236 68C

Abstract:

A method and apparatus for measuring and compensating for the impact of environmental effects on industrial processing units. A thermal test element having a low thermal mass and high conductivity is exposed to the environment. Ambient air temperature is sensed at a nearby location, and a differential temperature controller determines how much energy is required to maintain the test element at a desired temperature differential from ambient temperature. Duty cycle and wattage outputs enable feedforward compensation for environmentally induced process unit control disturbances.