| 摘要 |
<p>Isopentane and di-methyl branched paraffins are separated from a feed containing same in admixture with di-methyl branched paraffins by contacting the feed with a molecular sieve adsorbent having elliptical pores of 5 to 5.5 Angstroms along the minor axis and 5.5 to 6 Angstroms along the major axis under separation conditions effective to adsorb mono-methyl branched paraffins, including isopentane, to form a mass transfer zone having isopentane concentrated at the edge thereof and to produce a portion of an adsorption effluent enriched in di-methyl branched paraffins; thereafter isopentane is eluted to produce a second portion of an adsorption effluent and the resulting rich adsorbent is subsequently regenerated by desorption of the mono-methyl paraffins.</p> |
