Patent ID: 8450545

Claim:
A process of: (a) modifying a zeolite catalyst with a tetraethyl orthosilicate compound with steam treatment and acid treatment to produce a modified zeolite catalyst wherein the modified zeolite catalyst has blocked pore sites; (b) flowing an oxygenated feed over the modified zeolite catalyst, wherein the oxygenated feed comprises hydrocarbons, methanol and dimethyl ether or a mixture thereof; and (c) reacting the hydrocarbons, methanol and dimethyl ether in the oxygenated feed with the modified zeolite catalyst to produce cyclic hydrocarbons, wherein the cyclic hydrocarbons produced has less than 10% durene, less than 3% benzene, and a median carbon number is C 8 wherein the acid treatment consists of: sulfuric acid, hydrocholoric acid, phosphoric acid, formic acid, acetic acid, oxalic acid trifluoroacetic acid, trichloroacetic acid, p-toluene-sulfonic acid, methanesulfonic acid and combinations thereof.