Determination of olefin and aromatic hydrocarbons

Determination of Olefins, Aromatics, Paraffins, and Naphthenes in Gasoline

“…The papers of Faragher, Morrell, and Levine (7), of Garner (10), and of Howes (15) give a good picture of the state of the art of hydrocarbon analysis in 1930 and earlier; therefore discussion of work prior to 1930 is omitted from this paper. In the work of Faragher, Morrell, and Levine, olefins and aromatics were removed by a procedure which involved treating with 91% sulfuric acid, redistilling to remove polymers, and finally treating with 98% acid to remove any remaining olefins or aromatics.…”

Peroxides in Gasoline - Peroxidation in Relation to Gasoline Composition

“…It is desirable, but not imperative, that the substance of which the insulator is made should also have high thermal resistance. That this requirement may be of relatively little importance under certain circumstances is shown by Smoluchowski's measurements on zinc dust (8) and by those of Mason on crumpled aluminum foil (5).…”

Approximate determination of olefin and aromatic hydrocarbons

“…By the simultaneous solution of Equations 4 and 5, the values of E and L are obtained. A METHOD has been described for the determination of olefin and aromatic hydrocarbons (2) in cracked gasolines involving the determination of the sum of the concentration of these hydrocarbons, the removal of the olefins by means of sulfur monochloride and distillation from the reaction products, and finally, the determination of the aromatic hydrocarbons in the olefin-free oil. Where the work is of such nature that an absolute error of 1 to 3 per cent is acceptable, the time may be shortened considerably by the use of the method described herein.…”