Processed support and methods of making and using same

Patent metadata

Field	Value
Publication number	US-9382175-B2
Application number	US-201414472022-A
Country	US
Kind code	B2
Filing date	Aug 28, 2014
Priority date	Sep 7, 2011
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A method for removing tightly bound sodium from a zeolitic support comprising contacting the support with a sodium specific removal agent to produce a treated support. A method comprising providing an aromatization catalyst comprising a treated support, and contacting the aromatization catalyst with a hydrocarbon feed in a reaction zone under conditions suitable for the production of an aromatic product. A catalyst support comprising an L-zeolite having less than 0.35 wt. % sodium.

First claim

What is claimed is:

1. A method comprising:
providing an aromatization catalyst comprising a treated support wherein the treated support is produced by contacting a zeolitic support with a sodium specific removal agent, wherein the zeolitic support comprises at least one zeolite selected from the group consisting of L-zeolite, X-zeolite, Y-zeolite, omega zeolite, beta zeolite, ZSM-4, ZSM-5, ZSM-10, ZSM-12, ZSM-20, REY, USY, RE-USY, LZ-210, LZ-210-A, LZ-210-M, LZ-210-T, SSZ-24, ZZA-26, SSZ-31, SSZ-33, SSZ-35, SSZ-37, SSZ-41, SSZ-42, SSZ-44, and MCM-58, and wherein the sodium specific removal agent comprises an ammonium-containing compound, an alkyl, aryl or arylalkyl ammonium-containing compound, or combinations thereof; and
contacting the aromatization catalyst with a hydrocarbon feed in a reaction zone under conditions suitable for the production of an aromatic product.

2. The method of claim 1 wherein the aromatization catalyst has a fouling rate of from about 0.01° F./hour to about 0.5° F./hour as determined by a temperature needed to achieve a targeted conversion of the hydrocarbon feed to a selected wt. % aromatics in the aromatization product wherein the aromatization product comprises C5 and heavier hydrocarbons.

3. A method comprising:
providing an aromatization catalyst comprising a treated support wherein the treated support is produced by contacting a zeolitic support with a sodium specific removal agent, wherein the zeolitic support comprises an L-zeolite, and wherein the sodium specific removal agent comprises an ammonium-containing compound, an alkyl, aryl or arylalkyl ammonium-containing compound, or combinations thereof; and
contacting the aromatization catalyst with a hydrocarbon feed in a reaction zone under conditions suitable for the production of an aromatic product.

4. The method of claim 1 wherein the aromatization catalyst further comprises at least one halide.

5. The method of claim 1 wherein the aromatization catalyst further comprises a metal.

6. The method of claim 5 wherein the metal is selected from the group consisting of Group VIII metals of the Periodic Table of the Elements.

7. The method of claim 1 wherein the sodium specific removal agent further comprises a tetraalkyl ammonium hydroxide.

8. The method of claim 7 wherein the tetraalkyl ammonium hydroxide is selected from the group consisting of tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide, tetrapropyl ammonium hydroxide, tetraisopropyl ammonium hydroxide, tetrabutyl ammonium hydroxide, tetraisobutyl ammonium hydroxide, and combinations thereof.

9. The method of claim 1 further comprising washing the treated support with a wash solution at a temperature in the range of from about 70° F. to about 200° F. and drying the treated support to form a dried treated support subsequent to contacting the treated support with the sodium specific removal agent.

10. The method of claim 1 wherein the hydrocarbon feed comprises non-aromatic hydrocarbons containing at least six carbon atoms.

11. The method of claim 1 wherein the hydrocarbon feed comprises equal to or less than about 10 wt. % C5 and lighter hydrocarbons.

12. The method of claim 1 wherein the hydrocarbon feed comprises equal to less than about 10 wt. % C9 and heavier hydrocarbons.

13. The method of claim 1 wherein the hydrocarbon feed comprises naphtha.

14. The method of claim 13 wherein the naphtha is characterized by a boiling point of from about 70° F. to about 450° F.

15. The method of claim 1 wherein the hydrocarbon feed comprises saturated hydrocarbons, paraffinic hydrocarbons, olefinic hydrocarbons, acetylenic hydrocarbons, cyclic hydrocarbons, cyclic olefinic hydrocarbons, or combinations thereof.

16. The method of claim 1 wherein the hydrocarbon feed contains less than about 100 ppb sulfur.

17. The method of claim 1 further comprising purifying the hydrocarbon feed prior to contacting the hydrocarbon feed with the aromatization catalyst.

18. The method of claim 1 further comprising recovering the aromatic product and processing the recovered aromatic product to produce a compound selected from the group consisting of benzene, toluene, paraxylene, orthoxylene, metaxylene and combinations thereof.

Assignees

• Chevron Phillips Chemical Co

Inventors

• Khare Gyanesh P

Classifications

• C07C2529/60

  of the type L · CPC title

• B01J29/068

  Noble metals · CPC title

• B01J29/60

  of the type L, as exemplified by patent document US3216789 · CPC title

• B01J37/22

  Halogenating · CPC title

• B01J2229/38

  Base treatment · CPC title