$2\mathrm{.}8$ In petroleum refineries, streams rich in alkylbenzenes and alkylnaphthalenes result from catalytic cracking operations. Such streams can be hydrodealkylated to more valuable products such as benzene and naphthalene. At $25C,$ solid naphthalene $($normal melting point $=80\mathrm{.}3C)$ has the following solubilities in various liquid solvents $[$Naphthalene$,$ API Publication $707,$ Washington, DC $($Oct$.1978)],$ including benzene:

$\backslash$table$[[$Solvent$,\backslash$table$[[$Mole Fraction$],[$Naphthalene$]]],[$Benzene$,0\mathrm{.}2946],[$Cyclohexane$,0\mathrm{.}1487],[$Carbon tetrachloride,$0\mathrm{.}2591],[n-$Hexane,$0\mathrm{.}1168],[$Water$,0\mathrm{.}18{10}^{-5}$