Petroleum distillation design data

Many azeotropic combinations exist among hydrocarbons themselves. Aromatic hydrocarbons, for example, are almost always found in petroleum fractions distilling below the true boiling point of the aromatics. Marschner and Cropper (41) accurately delineated the limits of azeotropy for benzene and toluene with saturated hydrocarbons, and Denyer et al. (11) did the same for the thiols. Consideration of such data is desirable in the design and operation of equipment for the distillation of gasoline fractions to produce specialized products. 

A2.3.2 Rechecking of the calibrations must be carried out on a routine basis as described in A2.5 because this distillation procedure is used for generating primary data fundamental to cost, yield and design practices in the petroleum industry. 

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