Mfi zeolites with substituted heteroatoms for selective toluene methylation
AssigneePurdue Research Foundation
InventorsRajamani P. Gounder, Andrew T. Norfleet, Bereket Tassew Bekele
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Abstract
A process for selective aromatic methylation using improved MFI zeolites and methods for making the same. The process contacts one or more aromatics and one or more oxygenates with a MFI zeolite comprising less than 30 wt % aluminum at reaction conditions sufficient to produce a product comprising one or more xylenes. The MFI zeolite can be obtained by combining a unique combination of one or more structure directing agents (SDA) and one or more heteroatoms, T, which produce a product slate that is highly selective toward para-xylenes.
Claims14
A process for selective aromatic methylation using MFI zeolites, comprising:
- contacting one or more aromatics and one or more oxygenates with a MFI zeolite comprising less than 30 wt % aluminum at reaction conditions sufficient to produce a product comprising one or more xylenes,
- wherein the MFI zeolite is obtained by:
- combining one or more structure directing agents (SDA) and water to form an aqueous solution;
- adding one or more heteroatoms, T, selected from the group consisting of boron, gallium, iron, and combinations thereof to the aqueous solution to form an intermediate agent;
- adding a source of silicon to the intermediate agent to form a synthesis gel;
- and
- crystallizing the synthesis gel to form the MFI zeolite.
Dependencies are inferred from the claim text.