Composition of matter and structure of zeolite UZM-55 and use in isomerization of aromatic molecules

Patent metadata

Field	Value
Publication number	US-10384989-B2
Application number	US-201715814257-A
Country	US
Kind code	B2
Filing date	Nov 15, 2017
Priority date	Dec 21, 2016
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

Isomerization processes such as the isomerization of ethylbenzene and xylenes, are catalyzed by the new crystalline aluminosilicate zeolite comprising a novel framework type that has been designated UZM-55. This zeolite is represented by the empirical formula:

M + m RAl 1-x E x Si y O z

where M represents a metal or metals selected from zinc or Group 1 (IUPAC 1), Group 2 (IUPAC 2), Group 3 (IUPAC 3) or the lanthanide series of the periodic table including sodium, potassium or a combination of sodium and potassium cations, R is an organic structure directing agent or agents derived from reactants R1 and R2 such as where R1 is diisopropanolamine and R2 is a chelating diamine, and E is an element selected from the group consisting of gallium, iron, boron and mixtures thereof. Catalysts made from UZM-55 have utility in various hydrocarbon conversion reactions.

First claim

The invention claimed is:

1. A process for the isomerization of ethylbenzene comprising:
contacting a feed stream comprising ethylbenzene with a catalyst comprising a microporous crystalline zeolite under isomerization conditions to yield a product stream having a higher xylene content than the feed stream where the microporous crystalline zeolite, after calcination and on an anhydrous basis, is represented by an empirical formula:
M m n+ Al x E y SiO z

where M represents hydrogen or a metal or metals selected from the group consisting of zinc, Group 1 (IUPAC 1) metals, Group 2 (IUPAC 2) metals, Group 3 (IUPAC 3) metals or lanthanide series metals of the periodic table, “m” is the mole ratio of M to Si and varies from 0 to about 1.0, “n” is the weighted average valence of M and has a value of about 1 to about 3, “x” is the mole ratio of Al to Si and has a value of from 0 to about 0.026, E is an element selected from the group consisting of gallium, iron, boron and mixtures thereof, “y” is the mole ratio of E to Si and has a value from 0 to about 0.026, and “z” is the mole ratio of O to (Al+E) and has a value determined by the equation: z=(4+m+3●x+3●y)/2;
wherein the microporous crystalline zeolite in a calcined form exhibits an XRD pattern as shown in the table below

2θ
d(Å)
I/I 0 %

7.19
12.28
MW-S

7.57
11.67
W-M

8.59
10.29
W-MW

14.72
6.013
VW

21.04*
4.219
VS

22.15
4.010
VW

23.03
3.859
MW-M

24.34
3.654
VW

26.63
3.345
VW-W

36.47
2.462
VW

44.49
2.035
VW.

2. The process of claim 1 wherein x is less than 0.02.

3. The process of claim 1 wherein y is less than 0.02.

4. The process of claim 1 wherein the microporous crystalline zeolite is thermally stable up to a temperature of at least 600° C.

5. The process of claim 1 wherein the microporous crystalline zeolite has an SiO 2 /Al 2 O 3 ratio greater than 75.

6. The process of claim 1 wherein the microporous crystalline zeolite has an SiO 2 /Al 2 O 3 ratio greater than 150.

7. The process of claim 1 wherein M is selected from the group consisting of lithium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, zinc, yttrium, lanthanum and gadolinium.

8. The process of claim 1 wherein the microporous crystalline zeolite has a micropore volume of greater than 0.08 mL/g and less than 0.15 mL/g.

9. The process of claim 1 wherein the isomerization conditions include a temperature of about 300° C. to about 450° C.

10. The process of claim 1 wherein the isomerization conditions include a pressure of about 70 psig to about 130 psig.

11. The process of claim 1 wherein the isomerization conditions include a weight hourly space velocity of about 5 h −1 to about 7 h −1 .

12. The process of claim 1 wherein the feed stream also comprises hydrogen and one or more xylenes selected from the group consisting of p-xylene, m-xylene, o-xylene and combinations thereof.

13. The process of claim 1 wherein the catalyst also comprises a hydrogenation function selected from a noble metal and a base metal, and a binder.

14. The process of claim 1 wherein the product stream has a higher para-xylene content than the feed stream.

15. A process for the isomerization of ethylbenzene and xylenes comprising:
contacting a feed stream comprising ethylbenzene and xylenes with a catalyst comprising a microporous crystalline zeolite under isomerization conditions to yield a product stream having a higher xylene content than the feed stream where the microporous crystalline zeolite, after calcination and on an anhydrous basis, is represented by an empirical formula:
M m n+ Al x E y SiO z

where M represents hydrogen or a metal or metals selected from the group consisting of zinc, Group 1 (IUPAC 1) metals, Group 2 (IUPAC 2) metals, Group 3 (IUPAC 3) metals or lanthanide series metals of the periodic table, “m” is the mole ratio of M to Si and varies from 0 to about 1.0, “n” is the weighted average valence of M and has a value of about 1 to about 3, “x” is the mole ratio of Al to Si and has a value of from 0 to about 0.026, E is an element selected from the group consisting of gallium, iron, boron and mixtures thereof, “y” is the mole ratio of E to Si and has a value from 0 to about 0.026, and “z” is the mole ratio of O to (Al+E) and has a value determined by the equation: z=(4+m+3♦x+3♦y)/2;
wherein the microporous crystalline zeolite in a calcined form exhibits an XRD pattern as shown in the table below

2θ
d(Å)
I/I 0 %

7.19
12.28
MW-S

7.57
11.67
W-M

8.59
10.29
W-MW

14.72
6.013
VW

21.04*
4.219
VS

22.15
4.010
VW

23.03
3.859
MW-M

24.34
3.654
VW

26.63
3.345
VW-W

36.47
2.462
VW

44.49
2.035
VW.

Assignees

• Uop Llc

Inventors

• Lobo Rodrigo J
• Nicholas Christopher P
• Miller Mark A
• Galey Melissa M

Classifications

• B01J29/064

  containing iron group metals, noble metals or copper · CPC title

• G01N23/20075

  by measuring interferences of X-rays, e.g. Borrmann effect · CPC title

• B01J29/7049

  containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead · CPC title

• C07C5/2708 Primary

  with crystalline alumino-silicates, e.g. molecular sieves · CPC title

• C07C15/073

  Ethylbenzene · CPC title