Method for preparing aromatization catalysts

Patent metadata

Field	Value
Publication number	US-10150104-B2
Application number	US-201514935982-A
Country	US
Kind code	B2
Filing date	Nov 9, 2015
Priority date	Nov 9, 2015
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A method of preparing an aromatization catalyst comprising contacting a zeolitic support with a metal-containing compound and a boron-containing compound to produce an impregnated support, and contacting the impregnated support with an activating composition to produce an aromatization catalyst, wherein the activating composition comprises a chlorine-containing compound and a fluorine-containing compound, and wherein the impregnated support is heated in the presence of the activating composition to a temperature in the range of from about 100° C. to about 500° C.

First claim

What is claimed is:

1. A method of preparing an aromatization catalyst comprising:
contacting a zeolitic support with a metal-containing compound and a boron-containing compound to produce an impregnated support; and
contacting the impregnated support with an activating composition to produce an aromatization catalyst, wherein the activating composition comprises a chlorine-containing compound and a fluorine-containing compound, and wherein the impregnated support is heated in the presence of the activating composition to a temperature in the range of from about 100° C. to about 500° C.

2. The method of claim 1 wherein the impregnated support, the aromatization catalyst, or both contain non-framework boron.

3. The method of claim 1 wherein the zeolitic support comprises an L-zeolite.

4. The method of claim 1 wherein the metal comprises a Group 8 transition metal.

5. The method of claim 1 wherein the metal-containing compound comprises platinum.

6. The method of claim 1 wherein the metal is present in the aromatization catalyst in an amount of from about 0.1 wt. % to about 50 wt. % by total weight of the aromatization catalyst.

7. The method of claim 1 wherein the boron-containing compound is water-soluble.

8. The method of claim 1 wherein the boron-containing compound is not a Brønsted acid.

9. The method of claim 1 wherein the boron-containing compound is a compound characterized by at least one of formulas: B(OR) 3 , wherein R comprises an alkyl group, a cycloalkyl, or an aryl group; H m B(OR) m , wherein R comprises an alkyl group, a cycloalkyl, or an aryl group, wherein m and n are integers from 0 to 3, and wherein the sum of m and n is 3; B(OR′) 3 N, wherein R′ is a C 1 to C 4 alkyl group; or combinations thereof.

10. The method of claim 1 wherein the boron-containing compound comprises triethanolamine borate, elemental boron, boric acid, boron bromide, boron carbide, boron fluoride, boron nitride, boron oxide, carborane, N,N-dimethylanilinium tetra(pentafluorophenyl)borate, methyl oxazaborolidine, nitronium tetrafluoroborate, phenylboron dichloride, phenylboron dihydroxide, potassium dodecahydrododecaborate hydrate, potassium tri-sec-butylborohydride, sodium cyanoborohydride, tetrafluoroboric acid, tri-n-amylborate, B-triboromoborazine, tri-n-butylborate, B-trichloroborazine, triethanolamineborate, triethylborate, triethylboron, trimethyoxyboroxine, trimethylborate, trimethylboron, triphenylboron, triphenylboron sodium hydroxide, tris(pentafluorophenyl)boron, tris(trimethylsiloxy)boron, triethylammonium dodecahydrododecaborate, bis(pinacolata)diboron, borane complexes, or combinations thereof.

11. The method of claim 1 wherein contacting the zeolitic support with the metal-containing compound and the boron-containing compound comprises impregnating the zeolitic support with an impregnating composition comprising the metal-containing compound and the boron-containing compound.

12. The method of claim 11 wherein the boron-containing compound is present in the impregnating composition at a boron:metal atomic ratio of from about 0.5:1 to about 20:1.

13. The method of claim 1 wherein the chlorine-containing compound is a gas-phase chlorine-containing compound.

14. The method of claim 13 wherein the gas-phase chlorine-containing compound comprises ammonium chloride, methyl ammonium chloride, tetramethylammonium chloride, tetraethylammonium chloride, tetrapropylammonium chloride, tetrabutylammonium chloride, methyltriethylammonium chloride, or combinations thereof.

15. The method of claim 1 wherein the fluorine-containing compound is a gas-phase fluorine-containing compound.

16. The method of claim 15 wherein the gas-phase fluorine-containing compound comprises
ammonium fluoride, methyl ammonium fluoride, tetramethylammonium fluoride, tetraethylammonium fluoride, tetrapropylammonium fluoride, tetrabutylammonium fluoride, methyltriethylammonium fluoride, or combinations thereof.

17. The method of claim 1 wherein the activating composition further comprises a carrier gas.

18. The method of claim 1 wherein the impregnated support is further thermally treated to produce a thermally treated impregnated support prior to a step of contacting the impregnated support with an activating composition.

19. A method of preparing an aromatization catalyst comprising:
contacting a zeolitic support with an impregnating composition comprising a platinum-containing compound and a boron-containing compound to produce a platinum-boron containing zeolitic support; and
contacting the platinum-boron containing zeolitic support with an activating composition comprising a chlorine-containing compound and a fluorine-containing compound to produce an aromatization catalyst, wherein the platinum-boron containing zeolitic support is heated in the presence of the activating composition to a temperature in the range of from about 100° C. to about 500° C.

20. The method of claim 19 wherein the zeolitic support is contacted with an impregnating composition having a boron:platinum atomic ratio of from about 0.5:1 to about 3.0:1.

Assignees

• Chevron Phillips Chemical Co Lp

Inventors

• Wu An-Hsiang

Classifications

• C07C5/31

  changing the number of rings · CPC title

• B01J37/24

  Chlorinating · CPC title

• B01J37/22

  Halogenating · CPC title

• C07C15/06

  Toluene · CPC title

• C07C2521/02

  Boron or aluminium; Oxides or hydroxides thereof · CPC title