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US5308602A Expired / Lapsed US ⏱️ 0.0 years remaining

Synthesis of crystalline ultra-large pore oxide materials

Assignee: Mobil Oil AS
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Filing: 1992-10-13
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Granted: 1994-05-03
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Expires: 2012-10-13
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Abstract

Abstract There is provided a method for preparing crystalline ultra-large pore oxide materials. The materials are formed from reaction mixtures comprising an amphiphilic compound, such as a cetyltrimethylammonium compound, a source of at least one oxide, such as silica, and water. The concentration of amphiphilic compounds in these reaction mixtures is rather low. The addition of an inorganic salt, such as sodium bromide, to the reaction mixture may result in the increased thermal stability of the as-synthesized form of the crystalline material and may also alter the crystalline phase of the product.

Inventors

  • 👤 David C. Calabro
  • 👤 John Hen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 23:46
CPC Classifications
C; C01; C01B; C01B37/00; C01B37/02

Claims Analysis

Total Claims: 20
Claim 1
Independent Claim 120 words
A method for preparing a composition of matter comprising an inorganic, crystalline phase exhibiting an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams anhydrous crystal at 50 torr and 25° C., said method comprising the steps of: (a) forming a reaction mixture comprising an amphiphilic compound, a source of at least one oxide and water, wherein the molar ratio of amphiphilic compound to water is less than 0.004; (b) maintaining said reaction mixture under sufficient conditions to form a crystalline oxide material; and (c) recovering said crystalline oxide material.
Claim 2
Independent Claim 120 words
A method for preparing a composition of matter comprising an inorganic, crystalline phase exhibiting an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams anhydrous crystal at 50 torr and 25° C., said method comprising the steps of: (a) forming a reaction mixture comprising an amphiphilic compound, a source of at least one oxide and water, wherein the molar ratio of amphiphilic compound to water is less than 0.004; (b) maintaining said reaction mixture under sufficient conditions to form a crystalline oxide material; and (c) recovering said crystalline oxide material.
Claim 3
Dependent Claim 31 words
A method according to claim 1, wherein said reaction mixture is maintained under crystallization conditions according to step (b) for a period of from about 4 hours to about 90 hours.
Claim 4
Dependent Claim 19 words
A method according to claim 1, wherein said molar ratio of amphiphilic compound to water is less than 0.002.
Claim 5
Dependent Claim 19 words
A method according to claim 2, wherein said molar ratio of amphiphilic compound to water is less than 0.0015.
Claim 6
Dependent Claim 14 words
A method according to claim 1, wherein said amphiphilic compound is a cetyltrimethylammonium compound.
Claim 7
Independent Claim 253 words
A method for preparing a composition of matter comprising an inorganic, crystalline phase exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per grams anhydrous crystal at 50 torr and 25° C., said method comprising the steps of: (a) forming a reaction mixture comprising an amphiphilic compound, a source of at least one oxide and water, wherein the molar ratio of amphiphilic compound to water is less than 0.004; (b) maintaining said reaction mixture under sufficient conditions to form a crystalline oxide material; (c) recovering said crystalline oxide material in as-synthesized form comprising residual amphiphilic compound, said as-synthesized form of said material having an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, said as-synthesized form of said material not being stable to calcination conditions sufficient to remove said residual amphiphilic compound; (d) stabilizing said material from step (c) to calcination conditions by treating said material from step (c) with a compound of the formula M'X'.sub.2 Y'm where M' is boron, aluminum, silicon or titanium; X' represents alkyl halides having from 1-6 carbon atoms and/or alkoxides having 1-6 carbon atoms; Y' represents X' and/or alkyls with 1-12 carbon atoms; and m=1-2; and (e) calcining said material from step (d) under conditions sufficient to remove residual organic compounds.
Claim 8
Independent Claim 253 words
A method for preparing a composition of matter comprising an inorganic, crystalline phase exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per grams anhydrous crystal at 50 torr and 25° C., said method comprising the steps of: (a) forming a reaction mixture comprising an amphiphilic compound, a source of at least one oxide and water, wherein the molar ratio of amphiphilic compound to water is less than 0.004; (b) maintaining said reaction mixture under sufficient conditions to form a crystalline oxide material; (c) recovering said crystalline oxide material in as-synthesized form comprising residual amphiphilic compound, said as-synthesized form of said material having an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, said as-synthesized form of said material not being stable to calcination conditions sufficient to remove said residual amphiphilic compound; (d) stabilizing said material from step (c) to calcination conditions by treating said material from step (c) with a compound of the formula M'X'.sub.2 Y'm where M' is boron, aluminum, silicon or titanium; X' represents alkyl halides having from 1-6 carbon atoms and/or alkoxides having 1-6 carbon atoms; Y' represents X' and/or alkyls with 1-12 carbon atoms; and m=1-2; and (e) calcining said material from step (d) under conditions sufficient to remove residual organic compounds.
Claim 9
Dependent Claim 31 words
A method according to claim 6, wherein said reaction mixture is maintained under crystallization conditions according to step (b) for a period of from about 4 hours to about 90 hours.
Claim 10
Dependent Claim 19 words
A method according to claim 6, wherein said molar ratio of amphiphilic compound to water is less than 0.002.
Claim 11
Dependent Claim 19 words
A method according to claim 7, wherein said molar ratio of amphiphilic compound to water is less than 0.0015.
Claim 12
Dependent Claim 14 words
A method according to claim 6, wherein said amphiphilic compound is a cetyltrimethylammonium compound.
Claim 13
Independent Claim 195 words
A method for preparing a composition of matter comprising an inorganic, crystalline phase exhibiting, after, calcination, an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per grams anhydrous crystal at 50 torr and 25.C, said method comprising the steps of: (a) forming a reaction mixture comprising an amphiphilic compound, a source of at least one oxide, an inorganic salt, and water, wherein the molar ratio of amphiphilic compound to water is less than 0.004; (b) maintaining said reaction mixture under sufficient conditions to form a crystalline oxide material; (c) recovering said crystalline oxide material in as-synthesized form comprising residual amphiphilic compound, said as-synthesized form of said material having an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, said as-synthesized form of said material being stable to calcination conditions sufficient to remove said residual amphiphilic compound; (d) calcining said material from step (c) under conditions sufficient to remove said residual amphiphilic compound.
Claim 14
Independent Claim 195 words
A method for preparing a composition of matter comprising an inorganic, crystalline phase exhibiting, after, calcination, an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per grams anhydrous crystal at 50 torr and 25.C, said method comprising the steps of: (a) forming a reaction mixture comprising an amphiphilic compound, a source of at least one oxide, an inorganic salt, and water, wherein the molar ratio of amphiphilic compound to water is less than 0.004; (b) maintaining said reaction mixture under sufficient conditions to form a crystalline oxide material; (c) recovering said crystalline oxide material in as-synthesized form comprising residual amphiphilic compound, said as-synthesized form of said material having an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, said as-synthesized form of said material being stable to calcination conditions sufficient to remove said residual amphiphilic compound; (d) calcining said material from step (c) under conditions sufficient to remove said residual amphiphilic compound.
Claim 15
Dependent Claim 31 words
A method according to claim 11, wherein said reaction mixture is maintained under crystallization conditions according to step (b) for a period of from about 4 hours to about 90 hours.
Claim 16
Dependent Claim 19 words
A method according to claim 11, wherein said molar ratio of amphiphilic compound to water is less than 0.002.
Claim 17
Dependent Claim 19 words
A method according to claim 12, wherein said molar ratio of amphiphilic compound to water is less than 0.0015.
Claim 18
Dependent Claim 14 words
A method according to claim 11, wherein said amphiphilic compound is a cetyltrimethylammonium compound.
Claim 19
Dependent Claim 19 words
A method according to claim 11, wherein said inorganic salt in said reaction mixture comprises an alkali metal halide.
Claim 20
Dependent Claim 22 words
A method according to claim 16, wherein said alkali metal halide is sodium bromide, and wherein said amphiphilic compound is cetyltrimethylammonium bromide.

References Cited (Backward Citations)

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US4859648A Cited
US5098684A Cited
US5102643A Cited
US5110572A Cited
US5156829A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-05-02 1997-11-01 1998-05-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-05-02 2001-11-01 2002-05-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-05-02 2005-11-01 2006-05-03 $7700.00 Window Closed / Lapsed

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