, one or more olefin(s) to produce a polymer product; reforming; hydrogenation; dehydrogenation; dewaxing of, for example, hydrocarbons to remove straight chain paraffins; absorption of, for example, alkyl aromatic compounds for separating out isomers thereof; alkylation of, for example, aromatic hydrocarbons such as benzene and alkyl benzene, optionally with propylene to produce cumene or with lo