Patent ID: 6019887
Filing Date: 2000-02-01
Classification: B01D,B01J,C07C,C10G

Abstract:
An adsorption/desorption process for selectively removing nitrites from a hydrocarbon feedstock, comprising the steps of:(a) providing a hydrocarbon feedstock having a nitrile content of less than or equal to about 400 ppm;(b) providing an adsorbent for selective removal of nitrites from a hydrocarbon feedstock comprising a substantially homogeneous mixture of a cationic nonacidic zeolite and an inorganic oxide matrix, said zeolite having an accessibility index of between about 0.1 and about 0.4;(c) contacting said feedstock and said adsorbent at nitrile adsorption conditions whereby at least about 80% of said nitrile content is adsorbed by said adsorbent during contact with at least about 200 volumes of said feedstock per volume of said adsorbent so as to provide a used adsorbent having nitrile molecules adsorbed thereon; and(d) contacting said used adsorbent with a desorbent at desorption conditions so as to remove said nitrile molecules and provide a renewed adsorbent.