Simulated distillation of petroleum residues by capillary SFC

Details Simulated distillation of petroleum residues by capillary SFC Simulated distillation of petroleum residues by capillary SFC

1987-05-15

1990-11-20

Wax, Robert A.

Chemistry: analytical and immunological testing

Hydrocarbon

436161, G01N 3300

Patent

active

049719157

ABSTRACT:
A method is provided which can be used to accurately determine the boiling points of middle to heavy petroleum residues (AEBP of 250-1400 degrees F.) using temperatures well below their decomposition temperatures. The method involves the use of a capillary supercritical fluid chromatography apparatus, and consists of a calibration run followed by a measurement run. First, a temperature T1 (between 100 degrees C. and 180 degrees C.) is established in a gas chromatographic (GC) oven of the SFC apparatus, and that temperature is maintained throughout the method. Then a calibration run is performed on a calibration standard using a pressure program, and a calibration function is calculated using the known boiling points of the calibration standard. Then the test sample is run using the same pressure program and the calibration function is used to calculate the boiling point distribution of the test sample.

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Hewlett-Packard Technical Note on 5880A Gas Chromatograph on Simulated Distillation.

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