# US 10,246,339 B2 · Crystalline molecular sieves and synthesis thereof

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- Number: US 10,246,339 B2
- Document ID: US10246339B2
- Status: Granted
- Kind: B2
- Application number: 15/649,032
- Filed: 2017-07-13
- Published: 2017-10-26
- Granted: 2019-04-02
- Earliest claimed: 2015-07-23
- Assignees: Chevron U.S.A. Inc.
- Applicants: Chevron U.S.A. Inc.
- Inventors: Stacey Ian Zones
- Web page: https://patentgrep.com/patent/US10246339B2

## CPC

- C01B 39/04: using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound
- B01J 20/18: Synthetic zeolitic molecular sieves
- B01J 20/3057: {Use of a templating or imprinting material (molecularly imprinted polymers B01J20/268); filling pores of a substrate or matrix followed by the removal of the substrate or matrix}
- B01J 29/041: {Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41}
- B01J 29/047: {Germanosilicates; Aluminogermanosilicates (B01J29/005 takes precedence)}
- B01J 29/18: of the mordenite type
- B01J 29/70: of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J 29/86: Borosilicates; Aluminoborosilicates {(B01J29/005 takes precedence)}
- B01J 39/14: Base exchange silicates, e.g. zeolites
- C01B 37/02: Crystalline silica-polymorphs, e.g. silicalites {dealuminated aluminosilicate zeolites}
- C01B 39/00: Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination (treatment to modify the sorption properties, e.g. shaping using a binder, B01J20/10; treatment to modify the catalytic properties, e.g. combination of treatments to make the zeolites appropriate to their use as a catalyst, B01J29/04; treatment to improve the ion-exchange properties B01J39/14)
- C01B 39/12: the replacing atoms being {at least} boron atoms
- C01B 39/265: {using at least one organic template directing agent}
- C01B 39/48: using at least one organic template directing agent
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

Crystalline molecular sieves and their synthesis using quaternary N-methyl-diisoalkylammonium cations as organic structure directing agents are disclosed. The structure directing agent has the following structure (1): in which R1 is selected from hydrogen, a methyl group, an ethyl group, a propyl group, and a hydroxymethyl group; and R2, R3, R4 and R5 are independently selected from a methyl group, an ethyl group, and a propyl group.

## Claims

### Claim 1

A crystalline molecular sieve, wherein the molecular sieve has a framework of SSZ-47 and the three-dimensional framework comprising oxides of silicon and aluminum, comprising within its pore structure N,N-dimethyl-di-sec-butylammonium cation.

### Claim 2 (depends on 1)

A method of synthesizing the crystalline molecular sieve of claim 1, the method comprising subjecting to crystallization conditions one or more sources of oxides silicon and aluminum in the presence of fluoride ions, water, and N,N-dimethyl-di-sec-butylammonium cations.

### Claim 3 (depends on 2)

The method of claim 2, wherein the molecular sieve is formed from a reaction mixture having the composition, in terms of mole ratios, as follows:
SiO2/Al2O3
≤5
Q/SiO2
0.10 to 1.0
F/SiO2
0.2 to 1.5
H2O/SiO2
1 to 10
wherein Q comprises N,N-dimethyl-di-sec-butylammonium cations.

### Claim 4 (depends on 2)

The method of claim 2, wherein the molecular sieve is formed from a reaction mixture having the composition, in terms of mole ratios, as follows:
SiO2/Al2O3
5 to 200
Q/SiO2
0.15 to 0.40
F/SiO2
0.30 to 0.60
H2O/SiO2
2 to 10
wherein Q comprises N,N-dimethyl-di-sec-butylammonium cations.

### Claim 5 (depends on 2)

The method of claim 2, wherein the crystallization conditions include a temperature of from 135° C. to 200° C.