Patent ID: 7214843
Filing Date: 2007-05-08
Classification: C07C,Y02P

Abstract:
1. A process for removing metalloaluminophosphate molecular sieve contaminants from an oxygenate feed and converting the oxygenate in the feed to olefin product, comprising the steps of: a) heating the oxygenate feed to form a vapor stream containing a majority of oxygenates in the oxygenate feed and a liquid stream containing a majority of metalloaluminophosphate molecular sieve contaminants in the oxygenate feed; b) separating the vapor stream from the liquid stream; c) contacting the separated vapor stream with metalloaluminophosphate molecular sieve to convert the oxygenates in the stream to olefin product; and d) discarding at least a portion of the separated liquid steam, which contains metalloaluminophosphate molecular sieve catalyst contaminants, wherein the metalloaluminophosphate molecular sieve catalyst contaminants in the discarded portion comprise at least one metal selected from the group consisting of iron, sodium, and potassium.