A process 1, in which {HEAD ~ the reaction} of the terephthaloyl chloride with {TAIL ~ the para phenylenediamine solution} is carried out continuously 
with
A process 1 , in which { HEAD ~ the reaction } of the terephthaloyl chloride with { TAIL ~ the para phenylenediamine solution } is carried out continuously
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH