Catalyst Treatment Useful for Aromatics Conversion Process
AssigneeUop LLC
InventorsEdwin Boldingh, Antoine Negiz, Gregory Maher, Paula Bogdan, Dean Rende
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Abstract
A process for preparing a transalkylation catalyst, the catalyst itself, and a transalkylation process for using the catalyst are herein disclosed. The catalyst comprises rhenium metal on a solid-acid support such as mordenite, which has been treated with a sulfur-based agent. Such treatment reduces the amount of methane produced by metal hydrogenolysis in a transalkylation process wherein heavy aromatics like A9+ are reacted with toluene to produce xylenes. Reduced methane production relative to total light ends gas production results in lower hydrogen consumption and lower reactor exotherms.
Claims15
A process for preparing a transalkylation catalyst comprising contacting the catalyst comprising a rhenium component, a solid-acid component, and an optional binder, with a sulfur-based treating agent effective for decreasing yields of methane under transalkylation conditions to form a catalyst consisting essentially of a rhenium component, a solid-acid component, an optional binder, and a sulfur component wherein the catalyst mole ratio of sulfur to rhenium is about 0.3 to about 0.8 and wherein the solid-acid component is selected from the group consisting of:
- (A) mordenite having a SiO2/Al2O3 ratio from about 13 to about 19, and
- (B) mordenite having a SiO2/Al2O3 ratio from about 13 to about 19, in combination with another component selected from the group consisting of mazzite, zeolite beta, ZSM-11, ZSM-12, ZSM-22, ZSM-23, EU-1, MAPO-36, MAPSO-31, SAPO-5, SAPO-11, SAPO-41, MFI topology zeolites, silica-alumina and combinations thereof.
A process for converting a hydrocarbon feed comprising C9+ aromatic compounds and toluene compounds, the process comprising the step of contacting the feed with a transalkylation catalyst under transalkylation conditions, wherein the transalkylation catalyst consists essentially of a rhenium component, a solid-acid component, an optional binder, and a sulfur component wherein the catalyst mole ratio of sulfur to rhenium is about 0.3 to about 0.8 and wherein the solid-acid component is selected from the group consisting of:
- (A) mordenite having a SiO2/Al2O3 ratio from about 13 to about 19, and
- (B) mordenite having a SiO2/Al2O3 ratio from about 13 to about 19, in combination with another component selected from the group consisting of mazzite, zeolite beta, ZSM-11, ZSM-12, ZSM-22, ZSM-23, EU-1, MAPO-36, MAPSO-31, SAPO-5, SAPO-11, SAPO-41, MFI topology zeolites, silica-alumina and combinations thereof.
A catalyst for transalkylation of aromatics consisting essentially of a rhenium component, a solid-acid component, an optional binder, and a sulfur component wherein the catalyst mole ratio of sulfur to rhenium is about 0.3 to about 0.8 and wherein the solid-acid component is selected from the group consisting of:
- (A) mordenite having a SiO2/Al2O3 ratio from about 13 to about 19, and
- (B) mordenite having a SiO2/Al2O3 ratio from about 13 to about 19, in combination with another component selected from the group consisting of mazzite, zeolite beta, ZSM-11, ZSM-12, ZSM-22, ZSM-23, EU-1, MAPO-36, MAPSO-31, SAPO-5, SAPO-11, SAPO-41, MFI topology zeolites, silica-alumina, and combinations thereof.
Dependencies are inferred from the claim text.