Molecular Sieve Adsorption. Application to Hydrocarbon Type Analysis

Mass Spectrometric Determination of the Ratio of Branched to Normal Hydrocarbons up to C18 in Fischer-Tropsch Product.

“…Molecular Sieve Technique. Three Molecular Sieve techniques were investigated: Simple mixing of the sample and sieve material (9), the vacuum evaporation method developed by Nelson, Grimes, and Heinrich (10) and an elution technique developed by O'Connor and Norris (11). The elution technique, described completely in (11), gave a better separation of normal and branched components (above Cm) in synthetic mixtures and was therefore used in characterizing the Briefly, the technique is as follow's.…”

“…The above authors used thermodynamic equilibrium data of Prosen, Pitzer, and acterizing the compound types in the light gas oil (100°t o 650°F .) fraction of petroleum (11). Molecular Sieves were used in determining total percentages of normal paraffins and straightchain olefins; however, carbon number distribution data were not obtained.…”

Determination of Normal Alpha-Olefins by Hydrobromination.

“…Preparation of Periflanthene [Diindeno(l,2,3-cd:l',2',3'-lm)perylene ]. This hydrocarbon was prepared by selfcondensation of fluoranthene with sodium amide in xylene (7)…”

Chromatography

“…Even paper chromatography on ordinary (669,824,894,931,1028), acetylated (753,871,1114), or benzoylated (752) cellulose paper is applicable to hydrocarbons. Molecular Sieves are used with low-boiling liquids as eluents (763,830).…”