The process 16 where the reaction is conducted at {HEAD ~ a temperature} between {TAIL ~ about 220°} and about 300° C 
The process 16 where the reaction is conducted at { HEAD ~ a temperature } between { TAIL ~ about 220 ° } and about 300 ° C
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH