DEHYDROCHLORINATION BEHAVIOR OF RIGID PVC PELLET IN NAOH SOLUTIONS ATELEVATED-TEMPERATURE

Rigid PVC pellet was treated at 150-250 degrees C in 0 similar to 7 M NaOH solutions for 0 similar to 12 h. The degree of dehydrochlorinatio n increased with increasing reaction temperature and reached about 100 % at 250 degrees C over 3 h. A porous char, 2 mu m pore size, was prod uced. The dehydrochlorination proceeded by a first order reaction in t he alkaline solution. Maximum rate of the dehydrochlorination for rigi d PVC was at 3 M NaOH. The apparent activation energy was 96 kJ mol(-1 ) in 3 M NaOH for rigid PVC. (C) 1998 Elsevier Science Limited. All ri ghts reserved.