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US5332566A
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Synthesis of crystalline ZSM-23
Assignee: Mobil Oil AS
•
Filing: 1993-07-16
•
Granted: 1994-07-26
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Expires: 2013-07-16
Abstract
Abstract This invention relates to a new form of crystalline material identified as having the structure of ZSM-23, 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.
Inventors
- 👤 Ahmad Moini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:29
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; C; C01; C01B; C01B39/00; C01B39/02; C01B39/46; C01B39/48; Y; Y10; Y10S; Y10S423/00; Y10S423/36
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
175 words
A method for synthesizing crystalline material exhibiting a characteristic X-ray diffraction pattern including d-spacing maxima values as shown in Table 1, which comprises (i) preparing a mixture capable of forming said material, said mixture comprising sources of alkali or alkaline earth metal (M), an oxide of trivalent element (X), an oxide of tetravalent element (Y), water and directing agent (R) of the formula (CH 3 ) 3 N + CH 2 CH 2 CH 2 N + (CH 3 ) 2 CH 2 CH 2 CH 2 N + (CH 3 ) 3 , and having a composition, in terms of mole ratios, within the following ranges; ______________________________________
YO.sub.2 /X.sub.2 O.sub.3
30 to 300
H.sub.2 O/YO.sub.2
20 to 100
OH.sup.- /YO.sub.2
0.1 to 0.4
M/YO.sub.2 0.05 to 1.0
R/YO.sub.2 0.02 to 1.0
______________________________________ (ii) maintaining said mixture under sufficient conditions including a temperature of from about 150° C. to about 190° C. until crystals of said material are formed; and (iii) recovering said crystalline material from step (ii), said recovered crystalline material containing said R.
Claim 2
Independent Claim
175 words
A method for synthesizing crystalline material exhibiting a characteristic X-ray diffraction pattern including d-spacing maxima values as shown in Table 1, which comprises (i) preparing a mixture capable of forming said material, said mixture comprising sources of alkali or alkaline earth metal (M), an oxide of trivalent element (X), an oxide of tetravalent element (Y), water and directing agent (R) of the formula (CH 3 ) 3 N + CH 2 CH 2 CH 2 N + (CH 3 ) 2 CH 2 CH 2 CH 2 N + (CH 3 ) 3 , and having a composition, in terms of mole ratios, within the following ranges; ______________________________________
YO.sub.2 /X.sub.2 O.sub.3
30 to 300
H.sub.2 O/YO.sub.2
20 to 100
OH.sup.- /YO.sub.2
0.1 to 0.4
M/YO.sub.2 0.05 to 1.0
R/YO.sub.2 0.02 to 1.0
______________________________________ (ii) maintaining said mixture under sufficient conditions including a temperature of from about 150° C. to about 190° C. until crystals of said material are formed; and (iii) recovering said crystalline material from step (ii), said recovered crystalline material containing said R.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein said mixture has the following composition ranges: ______________________________________
YO.sub.2 /X.sub.2 O.sub.3
45 to 200
H.sub.2 O/YO.sub.2
40 to 70
OH.sup.- /YO.sub.2
0.25 to 0.35
M/YO.sub.2 0.2 to 0.6
R/YO.sub.2 0.05 to 0.15
______________________________________
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein said mixture further comprises seed crystals in sufficient amount to enhance synthesis of said crystalline material.
Claim 5
Dependent Claim
15 words
The method of claim 3 wherein said seed crystals have the structure of ZSM- 23.
Claim 6
Dependent Claim
29 words
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 7
Dependent Claim
13 words
The method of claim 1 wherein X comprises aluminum and Y comprises silicon.
Claim 8
Dependent Claim
138 words
A mixture capable of forming crystals of ZSM-23 structure upon crystallization, said mixture comprising sources of alkali or alkaline earth metal (M), 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 directing agent (R) of the formula (CH 3 ) 3 N + CH 2 CH 2 CH 2 N + (CH 3 ) 2 CH 2 CH 2 CH 2 N 30 (CH 3 ) 3 , and having a composition, in terms of mole ratios, within the following ranges: ______________________________________
YO.sub.2 /X.sub.2 O.sub.3
30 to 300
H.sub.2 O/YO.sub.2
20 to 100
OH.sup.- /YO.sub.2
0.1 to 0.4
M/YO.sub.2 0.05 to 1.0
R/YO.sub.2 0.02 to 1.0
______________________________________
Claim 9
Dependent Claim
138 words
A mixture capable of forming crystals of ZSM-23 structure upon crystallization, said mixture comprising sources of alkali or alkaline earth metal (M), 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 directing agent (R) of the formula (CH 3 ) 3 N + CH 2 CH 2 CH 2 N + (CH 3 ) 2 CH 2 CH 2 CH 2 N 30 (CH 3 ) 3 , and having a composition, in terms of mole ratios, within the following ranges: ______________________________________
YO.sub.2 /X.sub.2 O.sub.3
30 to 300
H.sub.2 O/YO.sub.2
20 to 100
OH.sup.- /YO.sub.2
0.1 to 0.4
M/YO.sub.2 0.05 to 1.0
R/YO.sub.2 0.02 to 1.0
______________________________________
Claim 10
Dependent Claim
64 words
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 11
Dependent Claim
64 words
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 12
Dependent Claim
15 words
The method of claim 8 wherein said replacing ion is hydrogen or a hydrogen precursor.
Claim 13
Dependent Claim
15 words
The method of claim 9 wherein said replacing ion is hydrogen or a hydrogen precursor.
Claim 14
Dependent Claim
11 words
A recovered crystalline material made by the method of claim 1.
Claim 15
Dependent Claim
11 words
A recovered crystalline material made by the method of claim 2.
Claim 16
Dependent Claim
12 words
An R-containing product crystalline material made by the method of claim 8.
Claim 17
Dependent Claim
12 words
An R-containing product crystalline material made by the method of claim 9.
Claim 18
Dependent Claim
12 words
An R-containing product crystalline material made by the method of claim 10.
Claim 19
Dependent Claim
12 words
An R-containing product crystalline material made by the method of claim 11.
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