To suppress the formation of a by-product at an industrially advantageous low temperature and efficiently produce the objective compound in high selectivity by using a catalyst containing a specific amount of a rare earth element supported on a zeolite when catalytically cracking a hydrocarbon.
A ≥2C hydrocarbon raw material is brought into contact with a catalyst supporting a rare earth element in an amount of 0.4-20 expressed in terms of atomic ratio to the aluminum in a crystalline aluminosilicate zeolite thereon. The hydrocarbon raw material is preferably subjected to dehydrogenating treatment and then brought into contact with the catalyst to improve the yield. ZSM-5 or ZSM-11 or both are preferred as the zeolite. Lanthanum, cerium and the like are preferred as the rare earth element. The catalyst preferably further contains 0.1-10 wt.% phosphorus supported thereon. The catalytic cracking reaction is preferably carried out in the presence of steam at 600-700°C.
MURATA KAZUHISA
HAYAKAWA TAKASHI
SUZUKI KUNIO
TAKEHIRA KATSUOMI
WAKUI KENICHI
SHIOZAWA MITSUHARU
SATO KOICHI
SAWADA GORO
NIPPON KAGAKU KOGYO KYOKAI
IDEMITSU PETROCHEMICAL CO
TONEN KAGAKU KK
NIPPON PETROCHEMICALS CO LTD
MARUZEN PETROCHEM CO LTD
Toshiaki Ikeura