OLEFIN UPGRADING PROCESS WITH GUARD BED REGENERATION

摘要

A process for the regeneration of materials used in the guard beds preced ing the reactors used in an olefin conversion process which converts olefini c refinery streams to higher boiling hydrocarbon products by polymerization (oligomerization) or alkylation of aromatics including benzene. Products of the process may include olefin oligomers and alkylaromatics in the gasoline boiling range as well as alkylaromatic petrochemicals such as cumene and eth ylbenzene. The process is integrated with the olefin conversion process to e nsure continuous operation of the olefin conversion without sending the feed stock containing the contaminant(s) to the reactor. The process uses reactio n products from the olefin conversion process to regenerate the guard bed ma terial and so is economically attractive since it does not require the use o f separate purge, regeneration feed and separation systems. A plurality of g uard beds is used, each containing a material which removes catalyst poisons . The guard beds are operated on a swing system in which one or more beds is kept on stream to remove the contaminant(s) while one or more of the remain ing beds is being purged or regenerated. In this way, continuity of operatio n is assured. The regeneration medium is a product stream from the olefin co nversion process.