Chiyoda Chemical Engineering Construction Co., Ltd.

Mamoru Ando

Yoshimi Shiroto

Yoshio Fukui

Yasumasa Homma

This invention relates to a process for continuously converting a heavy oil into an asphaltene-metal-free oil by hydrotreating said heavy oil to crack asphaltenes selectively and remove heavy metals such as vanadium and nickel from said heavy oil simultaneously (hereinafter briefly referred to as 'removal of metals'), separating the liquid products into a light fraction of an asphaltene-free and metal-free oil and a heavy fraction of an asphaltene and heavy metal-containing oil (hereinafter referred to as a 'heavy fraction'), recovering said light fraction as a product, and recycling said heavy fraction to said hydrotreating step.

Process for hydrotreating heavy hydrocarbon oil

A process for hydrodesulfurization of heavy hydrocarbon oil containing asphaltenes and heavy metals in large amounts is disclosed. The heavy oil is hydrotreated in a continuous 2-step process. In the first step the heavy oil is subjected to hydrodemetallization and selective cracking of asphaltenes by the use of a catalyst having a unique selectivity therefor. In the second step the effluent from the first step is subjected to hydrodesulfurization to produce desulfurized oils of high grade by the use of a catalyst having a pore volume and pore size distribution particularly adapted for the hydrodesulfurization of the effluent.

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Kawasaki, Japan

Mamoru Ando