Fuji Oil Company Limited

Chiyoda Chemical Engineering Construction Co., Ltd.

Fuji Standard Research, Inc.

Fuji Standard Research Kabushiki Kaisha

Shigeru Miwa

Shimpei Gomi

Tomomitsu Takeuchi

Takao Nakagawa

Toru Takatsuka

Tomio Arai

Ryuzo Watari

Itaru Matsuo

Toshio Tsutsui

Molten pitch is mixed and atomized in an inert gas stream having a temperature less than that of the molten pitch, cooled to the ordinary temperature and separated from the gas stream. Fine powder such as carbon, silica alumina and the like is added to at least one step of the process to improve the fluidity of the thusly obtained fine solid pitch spheres. The pitch spheres are easy to storage, handle and transport as they behave like a fluid.

Process for producing oil-containing, microspherical carbonaceous

A heavy hydrocarbon feed stock is, after being heat-treated in a first cracking zone, is introduced into a second thermal cracking zone for obtaining a thermally cracked product and a pitch product. The second cracking zone has a plurality of cracking reactors which are connected in series, through which is successively passed the treated feed stock and to each of which is supplied a gaseous heat transfer medium to maintain the liquid phase therein at a temperature sufficient for effecting the thermal cracking and to strip the resulting distillable, cracked components from the liquid phase. The thermal cracking temperature in one reactor is so controlled as to become higher than that in its adjacent upstream-side reactor. The distillable, cracked components in respective reactors are removed overhead therefrom and separated into a heavy fraction and a light fraction, while the liquid phase in the downstream-end reactor is discharged therefrom for recovery as the pitch product. The light fraction is recovered as a light product oil, while the heavy fraction is fed to a third thermal cracking zone for obtaining a tar-containing product which is recycled to at least one of the reactors of the second thermal cracking zone together with a naphthene base heavy hydrocarbon oil.

Process of thermally cracking heavy hydrocarbon oils

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Ichihara, Japan

Shigeru Miwa