Modified ultra-stable y (usy) zeolite catalyst for dealkylation of aromatics
AssigneesSaudi Arabian Oil Company, JGC Catalysts and Chemicals Ltd., Japan Cooperation Center Petroleum
InventorsOmer Refa Koseoglu, Robert Peter Hodgkins, Mitsunori Watabe, Koji Uchida
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Abstract
The present disclosure relates to a process for the hydrodealkylation of aromatic rich hydrocarbon streams to produce benzene, toluene and mixed xylenes (BTX), with high selectivity towards high value xylenes. The process uses catalysts containing a framework-substituted zirconium and/or titanium and/or hafnium-modified ultra-stable Y (USY) type zeolite.
Claims24
A process for hydrodealkylating a hydrocarbon feed to produce a dealkylated product, the process comprising the step of reacting the hydrocarbon feed with a hydrogen feed in the presence of a dealkylation catalyst, wherein the hydrocarbon feed comprises aromatic hydrocarbons with nine or more carbon atoms (C9+ aromatics;
- and wherein the dealkylation catalyst is a framework-substituted ultra-stable Y (USY)-type zeolite in which a portion of aluminum atoms constituting a zeolite framework thereof is substituted with zirconium atoms and/or titanium and/or hafnium atoms.
A process for producing mixed xylenes from a hydrocarbon feed, the process comprising the step of reacting the hydrocarbon feed with a hydrogen feed in the presence of a dealkylation catalyst which hydrodealkylates aromatic hydrocarbons in the hydrocarbon feed;
- wherein the hydrocarbon feed comprises aromatic hydrocarbons with nine or more carbon atoms (C9+ aromatics);
- and wherein the dealkylation catalyst is framework-substituted ultra-stable Y (USY)-type zeolite in which a portion of aluminum atoms constituting a zeolite framework thereof is substituted with zirconium atoms and/or titanium and/or hafnium atoms.
Dependencies are inferred from the claim text.