This invention provides for a process for hydrocarbon conversion in which a partially dehydrated hydrocarbon feedstock is contacted with at least two different molecular sieve materials, including a first molecular sieve having a Si/Al molar ratio of less than about 5 and a second molecular sieve having a Si/Al molar ratio of greater than about 5. Also, this invention includes such processes in which such feedstocks are contacted with a first molecular sieve having pores of at least about 6 Angstroms and a second molecular sieve having pores of less than about 6 Angstroms.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of Ser. No. 10/900,617, filed Jul. 28, 2004 now U.S. Pat. No. 7,199,275 (now allowed) which is a continuation-in-part of U.S. patent application Ser. No. 10/807,777 filed Mar. 22, 2004 now abandoned, which application is a nonprovisional application that claims the benefits of U.S. provisional patent application Ser. No. 60/457,087 filed Mar. 24, 2003, the disclosures of which are incorporated by reference in their entireties.