Nitrile selective removal process
US6019887A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1998 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Nov 19, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G25/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An adsorption/desorption process for selectively removing nitriles from a hydrocarbon feedstock includes 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 nitrile from a hydrocarbon feedstock comprising a substantially homogeneous mixture of a cationic nonacidic zeolite and an inorganic oxide matrix, the zeolite having an accessibility index of between about 0.1 to about 0.4; (c) contacting the feedstock and the adsorbent at nitrile adsorption conditions whereby at least about 80% of the nitrile content is adsorbed by the adsorbent during contact with at least about 200 volumes of the feedstock per volume of the adsorbent so as to provide a used adsorbent having nitrile molecules adsorbed thereon; and (d) contacting the used adsorbent with a desorbent at desorption conditions so as to remove the nitrile molecules and provide a renewed adsorbent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.