Low-temperature distillation

Karr, C, Chang, T.L. (1958) Spectrophotometric analysis of the distillable low-temperature tar bases. [Low-temperature bituminous-coal-tar base mixture boiling up to ca. 353/sup 0/C]. Journal of Institute of Fuel, 31,522-527. 

Oleffin/paraffin separation is other very important separation process in refineries. Propane produced in refinery operations often contains substantial amounts of propylene. Propylene may cause problems through engine and injector deposits when propane is used as a motor fuel. Also, propylene is capable of polymerizing in storage, fuel lines, or vaporizers, and thus may cause plugging by gum deposits. In this case the traditional separation technologies involving distillation (low-temperature and extractive distillation) and catalytic... 

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