Patent ID: 7259287
Filing Date: 2007-08-21
Classification: C10G,Y02P,Y10S

Abstract:
1. A process of starting up a reaction system, the process comprising the steps of: a) heating at least a portion of the reaction system; b) loading a catalyst, the catalyst comprising activated metalloaluminophosphate molecular sieve, into a heated portion of the reaction system, wherein the catalyst loaded into the reaction system is maintained at a predetermined catalytic activity index while the sieve is in the reaction system, with the catalytic activity index being defined as wherein t=time of contact of catalyst with water (hours) T=temperature at contact (° C.) PP alpha=−0.071 n=3.5 ƒ(T)=exp(ea(1/(T+273)−n 1/(T ea=−5500° K. T ƒ((PP ƒ(PP for 180° C. (453° K.)>T≧150° C. (433° K.) P c) heating the catalyst loaded into the reaction system; and d) contacting the heated catalyst with feed in the reaction system.