Patent
أعرض في EDS

Stable shape-selective catalyst for aromatic alkylation and methods of using and preparing

التفاصيل البيبلوغرافية
العنوان: Stable shape-selective catalyst for aromatic alkylation and methods of using and preparing
Patent Number: 8,846,559
تاريخ النشر: September 30, 2014
Appl. No: 12/263689
Application Filed: November 03, 2008
مستخلص: A catalyst and method of forming a catalyst for use in aromatic alkylation involves treating a zeolite, which may be a ZSM-5 zeolite, with a phosphorus-containing compound. The phosphorus-treated zeolite is combined with a binder material. The bound phosphorus-treated zeolite is treated with an aqueous solution of a hydrogenating metal compound by contacting the bound phosphorus-treated zeolite with the aqueous solution and separating the aqueous solution from the bound phosphorus-treated zeolite to form a hydrogenating-metal-containing zeolite catalyst. The catalyst may be used in preparing an alkyl aromatic product by contacting a hydrogenating-metal-containing zeolite catalyst with an aromatic alkylation feed of an aromatic compound and an alkylating agent under reaction conditions suitable for aromatic alkylation.
Inventors: Ghosh, Ashim Kumar (Houston, TX, US); Kulkarni, Neeta (Houston, TX, US)
Assignees: Saudi Basic Industries Corporation (Riyadh, SA)
Claim: 1. A hydrogenating-metal-containing zeolite catalyst for use in aromatic alkylation, the catalyst formed by treating a ZSM-5 zeolite with a phosphorus-containing compound to form a phosphorus-treated zeolite; combining the phosphorus-treated zeolite with a binder material to form a bound phosphorus-treated zeolite; treating the bound phosphorus-treated zeolite with an aqueous solution of a hydrogenating metal compound by contacting the bound phosphorus-treated zeolite with the aqueous solution to form a hydrogenating-metal-containing zeolite in an aqueous medium, wherein the hydrogenating metal is Group VIII transition metal; separating the aqueous medium from the bound phosphorus-treated zeolite using a non-evaporative separation technique; and calcining to form a hydrogenating-metal-containing zeolite catalyst.
Claim: 2. The catalyst of claim 1 , wherein: the hydrogenating metal is selected from at least one of nickel, palladium and platinum.
Claim: 3. The catalyst of claim 1 , wherein: the calcining is at a temperature of about 400° C. or higher.
Claim: 4. The catalyst of claim 1 , wherein: the hydrogenating metal is present in the catalyst in an amount of about 0.03% to about 5% by total weight of catalyst.
Claim: 5. The catalyst of claim 1 , wherein: the catalyst contains about 0.01% to about 15% phosphorus by total weight of catalyst.
Claim: 6. The catalyst of claim 1 , wherein: the binder comprises an alumina binder.
Claim: 7. The catalyst of claim 1 , wherein: the binder is present in the catalyst in an amount of about 1% to about 99% by total weight of the catalyst.
Claim: 8. The catalyst of claim 2 , wherein the hydrogenating metal comprises nickel.
Claim: 9. The catalyst of claim 8 , wherein the nickel is present in the catalyst in an amount of about 0.01% to about 5% by total weight of the catalyst.
Claim: 10. The catalyst of claim 9 , wherein the nickel is present in the catalyst in an amount of about 0.03% to about 2.0% by total weight of the catalyst.
Claim: 11. The catalyst of claim 8 , wherein: the catalyst contains about 0.01% to about 15% phosphorus by total weight of catalyst; and the binder comprises an alumina binder.
Claim: 12. The catalyst of claim 1 , wherein the temperature of the aqueous solution is maintained at a temperature below the boiling point of the aqueous solution.
Claim: 13. The catalyst of claim 12 , wherein the temperature of the aqueous solution is maintained at room temperature.
Claim: 14. The catalyst of claim 1 , wherein the non-evaporative separation technique comprises decanting.
Claim: 15. A method of forming a hydrogenating-metal-containing zeolite catalyst for use in aromatic alkylation, the method comprising: treating a ZSM-5 zeolite with a phosphorus-containing compound to form a phosphorus-treated zeolite; combining the phosphorus-treated zeolite with a binder material to form a bound phosphorus-treated zeolite; treating the bound phosphorus-treated zeolite with an aqueous solution of a hydrogenating metal compound by contacting the bound phosphorus-treated zeolite with the aqueous solution to form a hydrogenating-metal-containing zeolite in an aqueous medium, wherein the hydrogenating metal is Group VIII transition metal; separating the aqueous medium from the bound phosphorus-treated zeolite using a non-evaporative separation technique; and calcining to form the hydrogenating-metal-containing zeolite catalyst.
Claim: 16. The method of claim 15 , wherein the temperature of the aqueous solution is maintained at a temperature below the boiling point of the aqueous solution.
Claim: 17. The method of claim 16 , wherein the temperature of the aqueous solution is maintained at room temperature.
Claim: 18. The method of claim 15 , wherein the non-evaporative separation technique comprises decanting.
Claim: 19. The method of claim 15 , wherein the hydrogenating metal is selected from at least one of nickel, palladium, and platinum.
Claim: 20. The method of claim 19 , wherein the hydrogenating metal comprises nickel.
Claim: 21. The method of claim 20 , wherein the nickel is present in the catalyst in an amount of about 0.03% to about 2% by total weight of catalyst.
Claim: 22. The method of claim 15 , wherein the catalyst contains about 0.01% to about 15% phosphorus by total weight of catalyst.
Current U.S. Class: 502/74
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Primary Examiner: Wood, Elizabeth
Attorney, Agent or Firm: Cantor Colburn LLP
رقم الانضمام: edspgr.08846559
قاعدة البيانات: USPTO Patent Grants
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