Process for separating normal and isoparaffins

Details Process for separating normal and isoparaffins Process for separating normal and isoparaffins

1975-09-24

1977-07-19

Levine, Herbert

Mineral oils: processes and products

Fractionation

Adsorption

260674SA, 260676MS, C10G 2504

Patent

active

040367452

ABSTRACT:
An improved process for separating normal paraffins from a feed stream containing a mixture of normal paraffins, isoparaffins and aromatic hydrocarbons to produce a normal paraffin product stream having a reduced concentration of contaminant aromatic hydrocarbons. The general process comprises the steps of contacting the feed stream with an adsorbent comprising a crystalline aluminosilicate wherein normal paraffins are adsorbed within the pores of the adsorbent and contaminant aromatics are adsorbed on the surface of the adsorbent and subsequently contacting the adsorbent with a desorbent material to remove both adsorbed normal paraffins and contaminant aromatics. The improvement resides in using a two-stage desorption step in which a first desorbent material contacts the adsorbent and removes surface-adsorbed aromatic contaminants and then a second desorbent material contacts the adsorbent to remove normal paraffins adsorbed within the pores of the adsorbent.

REFERENCES:
patent: 3205166 (1965-09-01), Ludlow et al.
patent: 3378486 (1968-04-01), Powers et al.
patent: 3715409 (1973-02-01), Broughton
patent: 3753896 (1973-08-01), Bryan et al.

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