Low pressure xylene isomerization

Details Low pressure xylene isomerization Low pressure xylene isomerization

C - Chemistry, Metallurgy

07

C

260/689.5

C07C 15/08 (2006.01) C07C 5/27 (2006.01)

Patent

CA 1105493

LOW PRESSURE XYLENE ISOMERIZATION ABSTRACT OF THE DISCLOSURE In a process for vapor phase isomerization of xylene in a mixture of alkyl aromatic compounds having eight carbon atoms; the improvement which comprises conducting the isomerization reaction in the presence of a catalyst consisting essentially of an aluminosilicate crystalline zeolite having a silica to alumina ratio of at least 12 and a constraint index of 1 to 12 at a partial pressure of said eight carbon atom alkyl aromatic compounds below about 100 pounds per square inch, a temperature of about 500°F. to about 800°F. and a space velocity of 3 to 13 pounds of said eight carbon atom aromatic compounds per pound of said zeolite per hour.

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