METHOD OF PRODUCING PETROLEUM ISOTROPIC FIBER-FORMING PITCH Russian patent published in 1996 - IPC

FIELD: petroleum chemistry. SUBSTANCE: pyrolysis resin is subjected for ultrasonic treatment in the presence of surface-active substances followed by thermic polycondensation in reactor of proton type at 20-50 ati. Low-molecular reaction products were distilled off in separator at nonoxidizing agent feeding at rate 375-10000 l/hr, at 300-360 C. Surface-active substances are a mixture of polyethylene glycol (average molecular mass is 400) and polyethylene glycol adipinate at mass ratio = (60:40)-(80:20) that are used at amount 0.1-0.5% of raw mass. EFFECT: improved method of pitch producing. 6 cl, 1 dwg, 2 tbl