Catalysts & Chemicals Industries Co., Ltd.

Shinichi Yoshida

Hidehiro Higashi

Katsuhiro Shirono

Yoichi Nishimura

Jun Fuchikami

Takemithu Yano

Yuusaku Arima

As modified zeolite is disclosed here wherein the volume occupied by pores having a diameter ranging from 50 .ANG. to 600 .ANG. measured by the nitrogen gas absorption method is 30% or more of the volume occupied by pores having a diameter ranging from 0 to 600 .ANG.. The catalyst containing this modified zeolite is suitably used especially in hydroprocessing heavy hydrocarbon oil.

Modified zeolite

A two-stage process for hydrotreating asphaltenes and metallic contaminants-containing heavy hydrocarbon oils which comprises a demetallization step using a catalyst composition which is smaller in pore size and less in active metal amount than the conventional demetallization catalysts, and a hydrotreating step using a catalyst composition which is larger in pore size and more in active metal amount than the conventional hydrodesulfurization catalysts or hydrocracking catalysts, said hydrotreating step being located downstream of said demetallization step.

Process for hydrotreating heavy hydrocarbon oils

Growing community of inventors

Kashiwa, Japan

Shinichi Yoshida