C8 aromatics isomerization using catalyst containing...

Details C8 aromatics isomerization using catalyst containing... C8 aromatics isomerization using catalyst containing...

C - Chemistry, Metallurgy

07

C

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

Patent

CA 2174045

A non-equilibrium C8 aromatic-feed mixture is selectively isomerized to obtain an isomerized product enriched in para-xylene by contacting the feed in the presence of hydrogen with a catalyst containing a combination of a platinum group component with an SM-3 acidic crystalline silicaaluminophosphate molecular sieve at C8 aromaticisomerization conditions. The SM-3 molecular sieve is enriched in framework silicon at the surface, resulting in a greater yield of para-xylene compared to prior art processes.

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