Patent ID: 6074548
Filing Date: 2000-06-13
Classification: B01D,C10G,F28D,F28F

Abstract:
A process for obtaining paraffins or paraffin fractions from a paraffin-containing melt, said paraffin-containing melt optionally being from a crude paraffin or a mixture containing various paraffin fractions, the process comprising:(a) pouring the paraffin-containing melt into a container equipped with a plurality of heat exchangers having heat exchange surfaces, to provide an initial liquid melt in the container;(b) cooling the heat exchange surfaces to a selected temperature, said selected temperature being below the melting temperature of the higher-melting paraffin fractions to be obtained and being higher than the melting temperature of a substantial portion of the low-melting fractions and oils to be discharged thus cooling of the initial liquid melt until the higher-melting fractions solidify, whereby the low-melting fractions remain liquid;(c) discharging the liquid low-melting fractions and oils from the container after a solid deposit of the higher-melting fractions forms on the heat exchanger surfaces; and(d) melting the solidified higher-melting fractions by increasing the temperature of the heat exchange surfaces.