# US 10,478,811 B2 · Synthesis of MTW framework type zeolites via interzeolite transformation

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- Number: US 10,478,811 B2
- Document ID: US10478811B2
- Status: Granted
- Kind: B2
- Application number: 15/785,546
- Filed: 2017-10-17
- Published: 2018-05-17
- Granted: 2019-11-19
- Earliest claimed: 2016-11-17
- Assignees: Chevron U.S.A. Inc.
- Applicants: Chevron U.S.A. Inc.
- Inventors: Stacey Ian Zones
- Web page: https://patentgrep.com/patent/US10478811B2

## CPC

- B01J 29/7469: {MTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3}
- B01J 29/7034: {MTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3}
- B01J 37/0018: {Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)}
- B01J 37/088: {Decomposition of a metal salt}
- B01J 37/10: in the presence of water, e.g. steam
- C01B 39/02: Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B 39/026: {After-treatment}
- C01B 39/48: using at least one organic template directing agent
- C10G 25/03: with crystalline alumino-silicates, e.g. molecular sieves
- C10G 45/12: containing crystalline alumino-silicates, e.g. molecular sieves
- C10G 45/64: containing crystalline alumino-silicates, e.g. molecular sieves
- B01J 37/18: with gases containing free hydrogen
- B01J 2229/183: in framework positions
- B01J 2229/38: Base treatment
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

A method is disclosed for synthesizing MTW framework type zeolites via interzeolite transformation in the presence of polyethyleneimine.

## Claims

### Claim 1

A method of synthesizing a MTW framework type zeolite, the method comprising:
(a) preparing a reaction mixture comprising:
(1) a FAU framework type zeolite;
(2) polyethyleneimine (Q);
(3) fluoride ions; and
(4) water; and
(b) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the MTW framework type zeolite.

### Claim 2 (depends on 1)

The method of claim 1, wherein the reaction mixture has a composition, in terms of molar ratios, as follows:
SiO2/Al2O3
≥10
Q/SiO2
0.10 to 0.60
F/SiO2
0.10 to 0.60
H2O/SiO2
5 to 60.

### Claim 3 (depends on 1)

The method of claim 1, wherein the reaction mixture has a composition, in terms of molar ratios, as follows:
SiO2/Al2O3
30 to 500
Q/SiO2
0.10 to 0.60
F/SiO2
0.10 to 0.60
H2O/SiO2
10 to 40.

### Claim 4 (depends on 1)

The method of claim 1, wherein the polyethyleneimine is a linear polyethyleneimine.

### Claim 5 (depends on 4)

The method of claim 4, wherein the linear polyethyleneimine has a number average molecular weight in a range of 1500 to 5000.

### Claim 6 (depends on 1)

The method of claim 1, wherein the crystallization conditions include a temperature of from 125° C. to 200° C.

### Claim 7

An MTW framework type zeolite comprising polyethyleneimine within its pore structure.

### Claim 8 (depends on 7)

The MTW framework type zeolite of claim 7, and having, in its as-synthesized and anhydrous form, a composition, in terms of molar ratios, as follows:
SiO2/Al2O3
≥10
Q/SiO2
>0 to 0.1
F/SiO2
>0 to 0.1
wherein Q is polyethyleneimine.

### Claim 9 (depends on 7)

The MTW framework type zeolite of claim 7, and having, in its as-synthesized and anhydrous form, a composition, in terms of molar ratios, as follows:
SiO2/Al2O3
30 to 500
Q/SiO2
>0 to 0.1
F/SiO2
>0 to 0.1
wherein Q is polyethyleneimine.

### Claim 10 (depends on 7)

The MTW framework type zeolite of claim 7, wherein the polyethyleneimine is a linear polyethyleneimine.

### Claim 11 (depends on 10)

The MTW framework type of claim 10, wherein the linear polyethyleneimine has a number average molecular weight in a range of 1500 to 5000.