S
WOil refinery
WAlkylationA
WWilliam Merriam Burton
WCracking (chemistry)B
WDoctor sweetening process
WFluid catalytic crackingC
WGas flare
WHydrogenationD
WIndustrial development in the Principality of Wallachia
WISO 20815E
WMethyl radical
WNelson complexity indexF
WPetroleum coke
WShukhov cracking process