US4444738A
Expired / Lapsed
US
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Process for producing crystalline aluminosilicates
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1981-11-23
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Granted: 1984-04-24
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Expires: 2001-11-23
Abstract
Abstract A process for producing a crystalline aluminosilicate which comprises hydrothermally reacting a starting mixture composed of a silicon compound, an aluminum compound, an alkali metal compound, a compound capable of releasing an organic cation in water, and water, characterized in that said starting mixture comprises at least two colloids having different silicon/aluminum atomic ratios, and that the hydrothermal reaction is carried out, as required, in the presence of a fluorine compound.
Inventors
- 👤 Takashi Suzuki
- 👤 Shoichiro Hashimoto
- 👤 Rieko Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:51
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2876; C07; C07C; C07C1/00; C07C1/20; C07C2529/00; C07C2529/04; C07C2529/06; Y; Y10; Y10S; Y10S423/00; Y10S423/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
166 words
A process for producing a crystalline aluminosilicate which comprises hydrothermally reacting a starting mixture composed of a silicon compound, an aluminum compound, an alkali metal compound, a compound capable of releasing an organic cation in water, and water to form a crystalline aluminosilicate in which each of the crystals is constituted by an integrated mass of many small but distinguishable heterogeneous portions having different silicon/aluminum atomic ratios, wherein said starting mixture comprises at least two types of colloids having different silicon/aluminum atomic ratios, said two types of colloids being two members selected from the group consisting of a gel having the following composition in mole ratio: SiO 2 /Al 2 O 3 : ≧25 Organic cation/SiO 2 : ≧0.01 Alkali metal cation/SiO 2 : 0.05-0.8 H 2 O/SiO 2 : ≧10 and a sol having the following composition in mole ratio: SiO 2 /Al 2 O 3 : ≧25 Organic cation/SiO 2 : 0-1.0 Alkali metal cation/SiO 2 : 0-2.0 H 2 O/SiO 2 : ≧10.
Claim 2
Dependent Claim
166 words
A process for producing a crystalline aluminosilicate which comprises hydrothermally reacting a starting mixture composed of a silicon compound, an aluminum compound, an alkali metal compound, a compound capable of releasing an organic cation in water, and water to form a crystalline aluminosilicate in which each of the crystals is constituted by an integrated mass of many small but distinguishable heterogeneous portions having different silicon/aluminum atomic ratios, wherein said starting mixture comprises at least two types of colloids having different silicon/aluminum atomic ratios, said two types of colloids being two members selected from the group consisting of a gel having the following composition in mole ratio: SiO 2 /Al 2 O 3 : ≧25 Organic cation/SiO 2 : ≧0.01 Alkali metal cation/SiO 2 : 0.05-0.8 H 2 O/SiO 2 : ≧10 and a sol having the following composition in mole ratio: SiO 2 /Al 2 O 3 : ≧25 Organic cation/SiO 2 : 0-1.0 Alkali metal cation/SiO 2 : 0-2.0 H 2 O/SiO 2 : ≧10.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said two types of colloids comprises both said gel and said sol.
Claim 4
Dependent Claim
41 words
The process of claim 1 wherein said starting mixture has the following composition in mole ratio: SiO 2 /Al 2 O 3 : ≧25 Organic cation/SiO 2 : ≧0.01 Alkali metal cation/SiO 2 : 0.05-0.8 H 2 O/SiO 2 : ≧10.
Claim 5
Dependent Claim
20 words
The process of any one of claims 1 to 3 wherein the organic cation is a quaternary organic ammonium ion.
Claim 6
Dependent Claim
19 words
The process of any one of claims 1 to 3 wherein the alkali metal cation is a sodium ion.
Claim 7
Dependent Claim
34 words
The process of claim 1 wherein one colloid in said starting mixture is present in a weight, calculated as SiO 2 , 0.1 to 20 times the weight of other colloid in said mixture.
Claim 8
Dependent Claim
41 words
The process of any one of claims 1 to 3 wherein said starting mixture is composed of said gel and sol, and the weight of said gel calculated as SiO 2 is 0.1 to 20 times the weight of said sol.
Claim 9
Dependent Claim
39 words
The process of claim 1 wherein said starting mixture further contains a fluorine compound, which promotes gellation and crystal growth, in an amount of at least 0.1 mole per mole of the starting mixture calculated as SiO 2 .
Claim 10
Dependent Claim
21 words
The process of claim 8 wherein said fluorine compound is a compound which dissociates in water to release a fluorine ion.
Claim 11
Dependent Claim
17 words
The process of claim 8 or 9 wherein said fluorine compound is sodium fluoride or ammonium fluoride.
Claim 12
Dependent Claim
22 words
The process of claim 8 wherein said fluorine compound is a compound which undergoes hydrolysis in water to release a fluorine ion.
Claim 13
Dependent Claim
19 words
The process of claim 8 or 11 wherein said fluorine compound is silicon fluoride, boron fluoride or sulfur fluoride.
Claim 14
Dependent Claim
23 words
The process of claim 1 wherein the hydrothermal reaction is carried out at a temperature of about 100° C. to about 200° C.
Claim 15
Dependent Claim
32 words
The process of claim 1 wherein said starting mixture is prepared by mixing said at least two types of colloids having different silicon/aluminum ratios by laminar flow mixing wherein shearing is minimized.
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |