The method 1 where the catalyst is presulfided such that {HEAD ~ 2 to 10 weight percent sulfur} is deposited on {TAIL ~ the catalyst} 
The method 1 where the catalyst is presulfided such that { HEAD ~ 2 to 10 weight percent sulfur } is deposited on { TAIL ~ the catalyst }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL