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US 5,644,129 AGranted
Direct analysis of paraffin and naphthene types in hydrocarbon
AssigneeExxon Research & Engineering Co.
InventorsChang S. Hsu, Saul C. Blum, Zhenmin Liang, Peter B. Grosshans, Winston K. Robbins
Life of this patent
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Abstract
The present invention is a method to distinguish and measure normal paraffins, isoparaffins, and naphthenes in a saturated hydrocarbon mixture. The method includes the step of field-ionizing hydrocarbon mixture; separating the normal paraffins, isoparaffins and naphthenes as a separate saturates class; and detecting the normal paraffins as molecular ions, naphthenes as molecular ions, and isoparaffins as fragment ions.
Claims11
A method to distinguish and measure normal paraffins, isoparaffins, and naphthenes in a saturated hydrocarbon mixture comprising:
- (a) field-ionizing said hydrocarbon mixture,
- (b) separating said normal paraffins, isoparaffins, and naphthenes, and
- (c) detecting said normal paraffins as molecular ions, naphthenes as molecular ions, and isoparaffins as fragment ions.
Dependencies are inferred from the claim text.