Fluoride-modified zeolite catalyst
AssigneeSaudi Basic Industries Corporation
InventorsAshim Ghosh, Pamela Harvey
Life of this patent
Estimating the term…
Abstract
A method of modifying a ZSM-5-type zeolite catalyst to increase selectivity of the catalyst for para-isomers in aromatic alkylation reactions is provided. The method includes contacting a ZSM-5-type zeolite catalyst with a fluoride-containing compound. The fluoride-containing zeolite catalyst can be used in aromatic alkylation to provide di-alkyl aromatic products. A method of preparing a xylene product is also accomplished by providing a fluoride-treated ZSM-5-type zeolite catalyst within a reactor. The fluoride-treated ZSM-5 zeolite catalyst is contacted with a toluene/methanol feed under reaction conditions conditions suitable for toluene methylation to form a xylene product containing at least 50% para-xylene by total mixed xylenes.
Claims14
A method of modifying a ZSM-5-type zeolite catalyst to increase selectivity of the catalyst for para-isomers in aromatic alkylation reactions, the method comprising contacting a ZSM-5-type zeolite catalyst having a silica to alumina molar ratio of at least about 200 or more with a fluoride-containing compound.
A catalyst for use in aromatic alkylation comprising a fluoride-containing ZSM-5-type zeolite catalyst having a silica to alumina molar ratio of at least about 200.
Dependencies are inferred from the claim text.