Patent ID: 7223714
Filing Date: 2007-05-29
Classification: B01J,C07C,C10G,Y02P

Abstract:
1. A process for transferring catalyst particles into an oxygenate to olefin reaction system, comprising: a) storing metalloaluminophosphate catalyst particles in a storage container; b) transferring the stored catalyst particles from the storage container to the reaction system, wherein transferring the stored catalyst particles from the storage container to the reaction system comprises pneumatically conveying the catalyst particles in a conduit from the storage container to the reaction system by a gas flow at a flow rate of at least 0.2 scf/lb catalyst; and c) introducing the gas flow into the storage container to transfer the stored catalyst particles at a volume transfer ratio of gas entering the storage container venus catalyst particles and gas exiting from the storage container of from 0.99 to 10.0, wherein the gas flow has a water dew point of 0° F. or less and the cumulative water content of the gas flow introduced into the storage container to transfer the catalyst is less than 0.1 lb water per lb of total catalyst.