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AssigneeExxonMobil Chemical Patents Inc.
InventorsJihad Mohammed Dakka, John Scott Buchanan, Robert Andrew Crane, Christine Nicole Elia, Xiaobing Feng, Larry Lee Iaccino, Gary David Mohr, Brenda Anne Raich, Jose′ Guadalupe Santiesteban, Lei Zhang
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This invention relates to a process for the selective alkylation of toluene and/or benzene with an oxygen-containing alkylation agent. In particular, the process uses a selectivated molecular sieve which has been modified by the addition of a hydrogenation component, wherein at least one of the following conditions is met: (a) the selectivated molecular sieve has an alpha value of less than 100 prior to the addition of the hydrogenation component, or (b) the selectivated and hydrogenated catalyst has an alpha value of less than 100. The process of this invention provides high selectivity for the alkylated product while reducing catalyst degradation.
A process for forming a selectively para-alkylated aromatic compound comprising reacting an alkylating agent with a feed comprising an aromatic compound selected from the group consisting of toluene, benzene, naphthalene, alkyl naphthalene and mixtures thereof in the presence of a catalyst under alkylation reaction conditions to produce a product containing said para-alkylated aromatic compound, said catalyst comprising a selectivated H-ZSM-5 molecular sieve and at least one hydrogenation metal selected from the group consisting of Rh, Pt and mixtures thereof, wherein said molecular sieve is selectivated by treatment with a phosphorus compound, a magnesium compound, a silicon compound and mixtures thereof, and wherein at least one of the following conditions is satisfied:
Dependencies are inferred from the claim text.