Method of increasing distillates yield in crude oil...

Mineral oils: processes and products – Fractionation – Distillation

Reexamination Certificate

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Details

C208S0480AA, C208S25100H, C208S349000, C208S352000, C208S357000, C208S364000, C208S365000

Reexamination Certificate

active

10387171

ABSTRACT:
Methods of separating components of a mixture, such as crude oil, are disclosed which increase the yield of individual components while decreasing the yield of residue. In one method, a heated mixture is fed to a column, a vapor stream is withdrawn from the column and separated, and a portion of the vapor stream is recycled back to the column. In another method, a mixture is separated into streams composed substantially of components having light, intermediate or heavy molecular weight and/or low, intermediate or high boiling point, respectively, and the streams are fed into the column at different positions. In both methods, individual light, intermediate and/or heavy molecular weight and/or low, intermediate and/or high boiling point component streams are then selectively withdrawn from the column.

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