Thomas W Chin

US Patent:

45238600, Jun 18, 1985

Filed:

Dec 14, 1982

Appl. No.:

6/449679

Inventors:

Thomas G. Chin - El Cerrito CA
Rudy F. Klaver - Albany CA
Arthur Alston - El Cerrito CA

Assignee:

Chevron Research Company - San Francisco CA

International Classification:

B01F 304
G01N 2512

US Classification:

374 27

Abstract:

A device for monitoring the amount of butane that can be safely added into a fuel gas before condensation occurs includes a dry-bulb thermocouple for measuring the temperature of the gas and a wet-bulb thermocouple for measuring the temperature of a wick soaked in the butane. For a continuous flowing process the difference in the two measured temperatures indicates the proportion of butane that can be added before saturation, and is used to regulate the flow rate of the butane. The wick is periodically flushed with butane, in order to prevent the heavy hydrocarbon components in the butane from accumulating.

US Patent:

45220565, Jun 11, 1985

Filed:

Aug 26, 1983

Appl. No.:

6/526737

Inventors:

Thomas G. Chin - El Cerrito CA
Arthur Alston - El Cerrito CA

Assignee:

Chevron Research Company - San Francisco CA

International Classification:

G01N 716

US Classification:

73 642

Abstract:

A method and apparatus for measuring Reid Vapor Pressure, as defined in the ASTM D-323 procedure, of liquid hydrocarbon materials wherein a sample of material is drawn from a sample can into a sample chamber containing a bellows and then to a measuring chamber. An expansion chamber, containing a bellows, connects with a measuring chamber for adjusting the amount of air within the measuring chamber and for setting the pressure within the measuring chamber before introduction of the sample so that RVP measurement occurs at the appropriate pressure.

US Patent:

46750282, Jun 23, 1987

Filed:

Mar 20, 1985

Appl. No.:

6/713782

Inventors:

Thomas G. Chin - El Cerrito CA
Rudy F. Klaver - Albany CA
Arthur Alston - El Cerrito CA

Assignee:

Chevron Research Company - San Francisco CA

International Classification:

B01F 304

US Classification:

481801

Abstract:

A device for monitoring the amount of butane that can be safely added into a fuel gas before condensation occurs includes a dry-bulb thermocouple for measuring the temperature of the gas and a wet-bulb thermocouple for measuring the temperature of a wick soaked in the butane in the gaseous environment of the fuel gas. For a continuous flowing process the difference in the two measured temperatures indicates the proportion of butane that can be added before saturation, and is used to regulate the flow rate of the butane. The wick is periodically flushed with butane, in order to prevent heavy hydrocarbon components in the butane from accumulating.

US Patent:

43321593, Jun 1, 1982

Filed:

Aug 29, 1980

Appl. No.:

6/182365

Inventors:

Thomas G. Chin - El Cerrito CA
Arthur Alston - El Cerrito CA

Assignee:

Chevron Research Company - San Francisco CA

International Classification:

G01N 716

US Classification:

73 642

Abstract:

A method and apparatus for measuring Reid Vapor Pressure, as defined in ASTM D-323 procedure, of liquid hydrocarbon materials including a totally contained system having a sample preparation portion and a measurement portion. The method and apparatus is totally automated in preparing the apparatus for measurement and in performing the measurement.

US Patent:

45438196, Oct 1, 1985

Filed:

Oct 19, 1983

Appl. No.:

6/543446

Inventors:

Thomas G. Chin - El Cerrito CA
Arthur Alston - El Cerrito CA

Assignee:

Chevron Research Company - San Francisco CA

International Classification:

G01N 714

US Classification:

73 642

Abstract:

The vapor-liquid ratio temperature of a liquid is determined for a specified vapor-liquid ratio and pressure by filling a chamber with a unit volume of the liquid. The capacity of the chamber is then expanded to generate a number of unit volumes of vapor equal to the specified ratio. Alternatively, a unit volume of the liquid can be discharged into an evacuated chamber having a fixed capacity equal to the number of unit volumes. The temperature of the liquid and vapor is maintained constant, and their pressure is measured when equilibrium is established. Deviations of the measured pressure from the specified pressure are translated into the vapor-liquid ratio temperature. In a gasoline blending environment, this temperature can be used to control the proportion of butane in the blended product.