Fuji Standard Research Kabushiki Kaisha

Toshio Tsutsui

Takao Nakagawa

Shimpei Gomi

Yoneichi Ikeda

Terukatsu Miyauchi

Tatsuji Kikuchi

Tomomitsu Takeuchi

Itaru Matsuo

Shigeru Miwa

A two-step process for producing microspherical pitch or green coke particles having an average diameter of 30-200 .mu.m from finely divided petroleum or coal pitch having a softening point of 60.degree.-220.degree. C. and a fixed carbon content of 40-75 wt %. In the first step the material pitch is fluidized in the stream of a gas substantially inert to the pitch at a temperature of 100.degree.-800.degree. C., the mixed stream is rapidly cooled to 30.degree.-400.degree. C., and microspherical pitch particles are recovered with or without separate recovery of an oily product. In the second step the pitch spheres are further subjected to thermal cracking and polycondensation by use of a fluidized bed at a temperature of 350.degree.-520.degree. C. for a retention time of 1 min. to 3 hours, and microspherical green coke particles and a light cracked oil are recovered. In both steps a pressure between the ordinary level and 10 kg/cm.sup.2 is used.

Process for producing microspherical, oil-containing carbonaceous

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

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Ichikawa, Japan

Toshio Tsutsui