Dehydrogenation as an aid to the mass spectrometric analysis of naphthenes

Characterization of Aromatics in Light Catalytic Cycle Stock by Spectrometric Techniques. Compound Types of the General Formula CnH2n-12 and CnH2n-14.

“…A great variety of different flow systems has been used in the past to study adsorption of gases on solids and to measure surface area as reviewed in detail by Brunauer (2) and by Orr and Dallavalle (11). Cremer and Roselius (5) have first pointed out that the chromatographic technique can be used not only to separate and identify gases or vapors, but also to characterize adsorbents or catalysts.…”

Mass Spectrometry

“…Low and high voltage techniques are combined to allow total analysis of olefinic naphthas without the necessity of separation (195). Cousins, Clancy, and Crable (117) indicate a combination of techniques is valuable in the qualitative and quantitative analysis of naphthene mixtures. In a sample of West Texas straight run asphalt having a molecular weight of 500 to 900, fragment ions indicate that heterocyclic and aromatic nuclei are predominant molecular structural groups (100).…”

Sulfonation and Dehydrogenation as an Aid to Gas Chromatography in Evaluating 90° to 150° C. Petroleum Fractions.

“…Rampton (11) and Polishuk, Donnel, and Wood (10) have described the selective dehydrogenation of cyclohexyl rings to aromatics. This was successfully used by Howard and Ferguson (6) and Cousins and Chaney (1) in developing mass spectroscopic methods to differentiate between cyclopentyl and cyclohexyl naphthenes. Polgar, Holst, and Groennings (9)e mployed long capillary gas chromatography columns to resolve the cyclohexanes in the C8 range.…”