Patent ID: 7384887
Filing Date: 2008-06-10
Classification: B01J,C07C,C10G,Y02P

Abstract:
1. A process for making olefin, the process comprising the steps of: a) mixing together crystalline molecular sieve that has not been formulated into a catalyst composition, liquid, and formulated molecular sieve catalyst that contains template material and one or more of matrix material and binder to form a slurry of solids and liquid, wherein from 15 wt % to 80 wt % of the solids in the slurry, based on total weight of solids in the slurry, is the formulated molecular sieve catalyst; b) drying the slurry; c) calcining the dried slurry to form the hardened molecular sieve catalyst composition so as to obtain an ARI of not greater than 0.6 wt %/hr; d) circulating the hardened molecular sieve catalyst composition through a reactor system for at least 4 months; and b) contacting the circulating molecular sieve catalyst with oxygenate to convert the oxygenate to olefin.