Exxon Chemical Patents, Inc.

Norman C Murtaugh

David E Vaughan

Ram N Bhatia

Alexandr P Glivicky

Nur R Gurak

Joseph W Gabriel

Wilfried J Mortier

The present invention provides a highly selective catalytic cracking process for the conversion of feedstocks containing a predominant content of C.sub.10 and higher mixed olefins into C.sub.9 and lower olefin products at efficiencies of greater than 20%. said products further characterized in that the content C.sub.6 to C.sub.9 olefins is maximized while the content of C.sub.2 to C.sub.4 olefins is minimized. The process involves contacting an olefin feedstock mixture containing at least about 50 weight %, more preferably at least about 70 weight %, of C.sub.10 and higher olefins under cracking conditions with a catalyst selected from the group consisting of amorphous precipitated silica, selected crystalline silicates and aluminosilicates, namely beta, mordenite and ZSM-5 types, as well as ion exchanged or acid variants thereof. Cracking conditions include a temperature within the range of from about 250.degree. up to about 450.degree. C., pressures from atmospheric up to about 300 psig and a space velocity within the range of from about 0.5 up to about 4 wt/wt/hour.

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Clearwater, Canada

Norman C Murtaugh