More specifically, the present invention is directed to a cascade refrigeration system wherein {HEAD ~ two separate refrigerant cycles} are utilized to cool and liquefy {TAIL ~ the feed stream} 
are utilized to cool
More specifically , the present invention is directed to a cascade refrigeration system wherein { HEAD ~ two separate refrigerant cycles } are utilized to cool and liquefy { TAIL ~ the feed stream }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL