A preferred reactor includes an outer shell having first and second ends and {HEAD ~ an inner surface}, a primary inner shell extending into {TAIL ~ the outer shell}, the primary inner shell defining a heat exchanging chamber and having primary and secondary ends, and a secondary inner shell having a first end located adjacent the secondary end of the primary inner shell 
A preferred reactor includes an outer shell having first and second ends and { HEAD ~ an inner surface } , a primary inner shell extending into { TAIL ~ the outer shell } , the primary inner shell defining a heat exchanging chamber and having primary and secondary ends , and a secondary inner shell having a first end located adjacent the secondary end of the primary inner shell
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH