injected for a 1 5 minute interval at a rate of 1 36 ml min the desorbent stream was then resumed at 1 lhsv and continued to pass into the adsorbent column until all of the feed components had been eluted from the column as determined by analyzing the effluent stream leaving the adsorbent column the branched chain olefins were removed as raffinate near the void volume and the normal olefins were desorbed thereafter the results of the separation are also set forth in the following table 2 under the headings gross retention volume grv net retention volume nrv and selectivity u03b2 table 2______________________________________ wt grv nrv selectivitycomponent in feed ml ml u03b2______________________________________mesitylene 38 9 0 0 u221e 2 methyl 2 butene 41 19 40 02 1 3 17 642 methyl 1 butene 8 38 40 8 1 9 12 703 methyl 1 butene 0 28 41 3 2 4 10 10cyclopentene 2 63 42 8 3 9 6 6cyclopentene 2 63 42 8 3 9 6 6n pentane 0 16 53 3 14 4 1 66cis 2 pentene 16 62 53 5 14 6 1 63trans 2 pentene 25 17 61 4 22 5 1 06pentene 1 4 94 62 7 23 8 1 00 ref ______________________________________ another pulse test was run to demonstrate the separation of other reactive materials by the adsorbent of the invention in this case the feed was a mixture of normal and branched chain c 14 and c 15 alcohols having the composition set forth in table 2 the adsorbent starting material was a laboratory made silicalite similar to the one described in example i sodium bicarbonate 6 8 g and water 558 7 g was added to 13709 of the extrudate pellets and mixed until uniformly wet the.