pressure reactor is used to which is added 40 grams of a 50 concentrated hydrochloric acid followed by 10 grams of distilled water the reaction is exothermic the temperature recorded for a single experiment was 60 u00b0 c 5 000 grams of pcbs was added and the temperature was recorded the pressure was gradually raised from 101 32 kpa normal atmospheric pressure which resulted in an increase in the temperature of the mixture the pressure was increased to 1013 kpa or until a temperature of 600 u00b0 c was reached once this was achieved it was held steady for 120 seconds and the pressure was released a previously dissolved mixture of ammonium chloride and water 6 76 grams and 3 24 grams respectively was then added to the container the resulting composition had a ph of 1 7 and a proton count of 3 6 u00d7 10 24 in the same system as above 60 grams of a 50 hydrochloric acid and 10 grams of distilled water was added in the same procedure as above next 5 000 grams of pcb was metered into the glass lined reactor the pressure was increased to 1057 kpa or until the temperature reached 650 u00b0 c the pressure was maintained to insure a temperature of above 650 u00b0 c for 120 seconds the pressure was then released and ammonium chloride water mixture 10 14 grams 4 86 grams was then added to the above container the resulting composition had a ph of 1 65 and a proton count of 3.