Process for producing paraxylene by methylating toluene with...

Details Process for producing paraxylene by methylating toluene with... Process for producing paraxylene by methylating toluene with...

2004-02-18

2008-01-22

Dang, Thuan Dinh (Department: 1764)

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

Reexamination Certificate

active

07321072

ABSTRACT:
A process for producing para-xylene by the selective methylation of toluene comprising contacting a reactant mixture comprising toluene, methanol and added water, with an oxide modified ZSM-5 zeolite catalyst in a flow reactor in conditions selected to limit coke formation on the catalyst and at a contact time, between reactant mixture and catalyst, of less than 1 second.

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Kaeding et al., “Selective Alkylation of Toluene with Methanol to Producepara-Xylene,”Journal of Catalysis, vol. 67, 1981, pp. 159-174.
Minachev et al., “Space Surface Characteristics and Catalytic Properties of Pentasil Systems in Reaction of Toluene with Methanol in Dependence of Their Composition, Modification Manner and Thermotreatment Conditions,” Proc. 9thInt. Congress of Catalysis, 1988, pp. 461-467.
Xie et al., “Dispersion of Oxides on HZSM-5 and Threshold Effect on Shape-Selective methylation of Toulene,” ACS Symposium Series No. 738, Shape Selective Catalysis, 2000, pp. 188-200.

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