Process for producing microspherical, oil-containing carbonaceous particles

摘要

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 DEG -220 DEG 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 DEG -800 DEG C., the mixed stream is rapidly cooled to 30 DEG -400 DEG 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 DEG -520 DEG 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/cm2 is used.