Abstract: This paper analyzes the defects of main methods for the deep removal of volatile organic compounds (VOC) from polypropylene in polypropylene industry at present. A method for the deep removal of VOCs from polypropylene particles has been found through a large number of experimental studies. This paper also determines the operating conditions of this method and studies the effect of this method on material properties. Finally, an industrialized process flow and an equipment design scheme are proposed to remove the VOCs from polypropylene particles

Key words: polypropylene, volatile organic compounds/VOC, devolatilization technique, ridge type devolatilization tower