, ▁rem in is cent ▁of ▁clean ing ▁products ▁( in ▁which ▁it ▁is ▁sometimes ▁used ). ▁Cy clo hex ane ▁is ▁mainly ▁used ▁for ▁the ▁industrial ▁production ▁of ▁ad ip ic ▁acid ▁and ▁cap rola ct am , ▁which ▁are ▁prec urs ors ▁to ▁n yl on . ▁ ▁Cy clo hex yl ▁is ▁the ▁alk yl ▁subst itu ent ▁of ▁cy clo hex ane ▁and ▁is ▁abbre vi ated ▁Cy . ▁ ▁Production ▁ ▁Modern ▁production ▁On ▁an ▁industrial ▁scale , ▁cy clo hex ane ▁is ▁produced ▁by ▁hydro gen ation ▁of ▁ben z ene ▁in ▁the ▁presence ▁of ▁a ▁Ran ey ▁nick el ▁catal yst . ▁ ▁Produ cers ▁of ▁cy clo hex ane ▁account ▁for ▁approximately ▁ 1 1 . 4 % ▁of ▁global ▁demand ▁for ▁ben z ene . ▁The ▁reaction ▁is ▁highly ▁ex oth erm ic , ▁with ▁ Δ H ( 5 0 0 ▁K ) ▁= ▁- 2 1 6 . 3 7   k J / m ol ). ▁De h ydro gen ation ▁comm enced ▁notice ably ▁above ▁ 3 0 0   ° C , ▁reflect ing ▁the ▁favor able ▁entropy ▁for ▁de h ydro gen ation . ▁ ▁Historical ▁methods ▁Un like ▁ben z ene , ▁cy clo hex ane ▁is ▁not ▁found ▁in ▁natural ▁resources ▁such ▁as ▁coal . ▁For ▁this ▁reason , ▁early ▁investig ators ▁synth es ized ▁their ▁cy clo hex ane ▁samples . ▁ ▁Early ▁fail ures ▁ ▁In ▁ 1 8 6 7 ▁Mar cell in