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US4151189A
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Synthesizing low sodium crystalline aluminosilicate zeolites with primary amines
Assignee: Mobil Oil AS
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Filing: 1978-04-10
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Granted: 1979-04-24
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Expires: 1998-04-10
Abstract
Abstract A method is disclosed for synthesizing a crystalline aluminosilicate zeolite containing an organic nitrogen cation in the presence of a primary monoalkylamine having 2 to 9 carbon atoms in the alkyl portion. The method produces a zeolite having a very low percentage, i.e. less than about 0.14 weight percent, generally less than about 0.1 weight percent of alkali metal, e.g. sodium, in the as-synthesized form. The product can be used directly as a catalyst without intermediate precalcination and cation exchange. This is not possible with zeolites such as those of the ZSM-5 type synthesized by the methods of the art.
Inventors
- 👤 Mae K. Rubin
- 👤 Edward J. Rosinski
- 👤 Charles J. Plank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:39
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2876; B01J29/65; B01J29/70; Y; Y10; Y10S; Y10S423/00; Y10S423/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
In a method for synthesizing a crystalline aluminosilicate zeolite containing an organic nitrogen cation and selected from the group consisting of ZSM-5, ZSM-12, ZSM-35 and ZSM-38, wherein a reaction mixture comprising sources of silica, alumina, alkali metal, water and organo nitrogen cation precursor is prepared and maintained under conditions of temperature and pressure to effect crystallization of said aluminosilicate zeolite, the improvement wherein said precursor consists of a primary amine having 2 to 9 carbon atoms, wherein said zeolite contains, in the as-synthesized form, less than 0.14% by weight of alkali metal and wherein said mixture is stirred during the synthesis of said zeolite.
Claim 2
Dependent Claim
104 words
In a method for synthesizing a crystalline aluminosilicate zeolite containing an organic nitrogen cation and selected from the group consisting of ZSM-5, ZSM-12, ZSM-35 and ZSM-38, wherein a reaction mixture comprising sources of silica, alumina, alkali metal, water and organo nitrogen cation precursor is prepared and maintained under conditions of temperature and pressure to effect crystallization of said aluminosilicate zeolite, the improvement wherein said precursor consists of a primary amine having 2 to 9 carbon atoms, wherein said zeolite contains, in the as-synthesized form, less than 0.14% by weight of alkali metal and wherein said mixture is stirred during the synthesis of said zeolite.
Claim 3
Dependent Claim
13 words
The method of claim 1 in which the said alkali metal is sodium.
Claim 4
Dependent Claim
10 words
The method of claim 1 wherein said zeolite is ZSM-5.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the temperature to effect crystallization is from about 175° F. to about 400° F.
Claim 6
Dependent Claim
24 words
The method of claim 1 in which the zeolite as synthesized has from less than about 0.01% to about 0.10% by weight of sodium.
Claim 7
Dependent Claim
10 words
The method of claim 1 wherein the amine is n-propylamine.
Claim 8
Dependent Claim
10 words
The method of claim 1 wherein the amine is isopropylamine.
Claim 9
Dependent Claim
10 words
The method of claim 1 wherein the amine is butylamine.
Claim 10
Dependent Claim
10 words
The method of claim 1 wherein the amine is ethylamine.
Claim 11
Dependent Claim
10 words
The method of claim 1 wherein the amine is n-pentylamine.
Claim 12
Dependent Claim
10 words
The method of claim 1 wherein the amine is n-hexylamine.
Claim 13
Dependent Claim
10 words
The method of claim 1 wherein the amine is n-heptylamine.
Claim 14
Dependent Claim
10 words
The method of claim 1 wherein the amine is n-octylamine.
Claim 15
Dependent Claim
10 words
The method of claim 1 wherein the amine is n-nonylamine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |