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the use of linear elution adsorption chromatography (LEAC) in petroleum separations is reviewed, as are previous applications of LEAC in the analysis of petroleum sulfur and nitrogen compound types. Future possibilities in the analysis for petroleum sulfur, nitrogen, and oxygen types by LEAC are discussed. The potential usefulness of such compound type determinations is briefly examined. Linear elution adsorption chromatography (LEAC) is a technique which appears quite promising for the rapid, routine analysis of petroleum samples according to compound type. The scope of this paper will be confined to applications of LEAC in the analysis of the so-called “extraneous materials” in petroleum: compounds containing sulfur, nitrogen, or oxygen. However, the technique is also useful in the analysis of the various hydrocarbon classes in petroleum (1–4). The discussion is in four parts: (l) some general observations on the LEAC technique per se, with particular reference to petroleum separations; (2) a review and evaluation of past applications of LEAC in the determination of various sulfur and nitrogen compound types; (3) a forecast of future possibilities of LEAC in the analysis of the extraneous materials in petroleum; and (4) a brief discussion of the potential usefulness of these analyses for the extraneous materials in petroleum.
linear elution adsorption chromatography, sulfur compound types, nitrogen compound types, oxygen compound types, petroleum
Snyder, L. R.
Research associate, Union Oil Co. of California, Brea, California