# US 5,350,570 A · Synthesis of crystalline ZSM-18

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- Number: US 5,350,570 A
- Document ID: US5350570A
- Status: Granted
- Kind: A
- Application number: 08/128,170
- Filed: 1993-09-29
- Granted: 1994-09-27
- Earliest claimed: 1993-09-29
- Assignees: Mobil Oil Corporation
- Inventors: Kirk D. Schmitt
- Web page: https://patentgrep.com/patent/US5350570A

## CPC

- C01B 39/48: using at least one organic template directing agent
- B01J 29/70: of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- 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

This invention relates to a new form of crystalline material identified as having the structure of ZSM-18, to a new and useful method for synthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound, e.g., hydrocarbon compound, conversion.

## Claims

### Claim 1

A method for synthesizing crystalline material exhibiting a characteristic X-ray diffraction pattern including d-spacing maxima values as shown in Table I, which comprises (i) preparing a mixture capable of forming said material, said mixture comprising sources of alkali metal (M), an oxide of trivalent element (X), an oxide of tetravalent element (Y), water and triquat (T) having the formula C.sub.15 H.sub.39 N.sub.4.sup.+++, represented as follows: ##STR3## and having a composition, in terms of mole ratios, within the following ranges:
______________________________________ YO.sub.2 /X.sub.2 O.sub.3 10 to 30 H.sub.2 O/YO.sub.2 10 to 100 OH.sup.- /YO.sub.2 0.10 to 0.80 M/YO.sub.2 0.00 to 0.50 T/YO.sub.2 0.03 to 0.30 ______________________________________
(ii) maintaining said mixture under sufficient conditions including a temperature of from about 80.degree. C. to about 150.degree. C. until crystals of said material are formed; and (iii) recovering said crystalline material from step (ii), said recovered crystalline material containing said T.

### Claim 2 (depends on 1)

The method of claim 1 wherein said mixture has the following composition ranges:
______________________________________ YO.sub.2 /X.sub.2 O.sub.3 15 to 18 H.sub.2 O/YO.sub.2 20 to 60 OH.sup.- /YO.sub.2 0.3 to 0.5 M/YO.sub.2 0.05 to 0.20 T/YO.sub.2 0.04 to 0.18. ______________________________________

### Claim 3 (depends on 1)

The method of claim 1 wherein said mixture further comprises seed crystals in sufficient amount to enhance synthesis of said crystalline material.

### Claim 4 (depends on 1)

The method of claim 1 wherein said X is aluminum, boron, iron, gallium, indium or a mixture thereof, and said Y is silicon, germanium, tin or a mixture thereof.

### Claim 5 (depends on 1)

The method of claim 1 wherein X comprises aluminum and Y comprises silicon.

### Claim 6 (depends on 1)

The method of claim 1 comprising replacing ions of the crystalline material recovered in step (iii), at least in part, by ion exchange with an ion or a mixture of ions selected from the group consisting of hydrogen and hydrogen precursors, rare earth metals and metals from Groups IIA, IIIA, IVA, IB, IIB, IIIB, IVB, VIB and VIII of the Periodic Table of Elements.

### Claim 7 (depends on 2)

The method of claim 2 comprising replacing ions of the crystalline material recovered in step (iii), at least in part, by ion exchange with an ion or a mixture of ions selected from the group consisting of hydrogen and hydrogen precursors, rare earth metals and metals from Groups IIA, IIIA, IVA, IB, IIB, IIIB, IVB, VIB and VIII of the Periodic Table of Elements.

### Claim 8 (depends on 6)

The method of claim 6 wherein said replacing ion is hydrogen or a hydrogen precursor.

### Claim 9 (depends on 7)

The method of claim 7 wherein said replacing ion is hydrogen or a hydrogen precursor.

### Claim 10 (depends on 1)

The recovered crystalline material of claim 1.

### Claim 11 (depends on 2)

The recovered crystalline material of claim 2.

### Claim 12 (depends on 6)

The T-containing product crystalline material of claim 6.

### Claim 13 (depends on 7)

The T-containing product crystalline material of claim 7.

### Claim 14 (depends on 8)

The T-containing product crystalline material of claim 8.

### Claim 15 (depends on 9)

The T-containing product crystalline material of claim 9.

### Claim 16

A mixture capable of forming crystals of ZSM- 18 upon crystallization, said mixture comprising sources of alkali metal (M), an oxide of trivalent element (X) oxide selected from the group consisting of oxide of aluminum, boron, iron, gallium, indium and mixtures thereof; tetravalent element (Y) oxide selected from the group consisting of oxide of silicon, germanium, tin and mixtures thereof; water and triquat (T) having the formula C.sub.15 H.sub.39 N.sub.4.sup.+++, represented as follows: ##STR4## and having a composition, in terms of mole ratios, within the following ranges:
______________________________________ YO.sub.2 /X.sub.2 O.sub.3 10 to 30 H.sub.2 O/YO.sub.2 10 to 100 OH.sup.- /YO.sub.2 0.10 to 0.80 M/YO.sub.2 0.00 to 0.50 T/YO.sub.2 0.03 to 0.30. ______________________________________