Patent US3902993A successfully refreshed from Google Patents.
US3902993A
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Flotation separation of crystalline aluminosilicate zeolite
Assignee: Mobil Oil AS
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Filing: 1974-02-20
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Granted: 1975-09-02
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Expires: 1994-02-20
Abstract
Abstract A process is provided for effecting separation by flotation of a crystalline aluminosilicate zeolite of the molecular sieve type from an aqueous salt solution, such as mother liquor, or from an aqueous slurry containing amorphous contaminant with which said zeolite is intermixed. It has been found that crystalline aluminosilicate zeolites have a specific affinity for air bubbles and rise to the surface in the froth produced during flotation and are thus separated from residual components.
Inventors
- 👤 Abbott F Houser
- 👤 Guenter H Kuehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:03
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/36; C01B39/38; C01B39/40; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/02; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838; C01B33/2853; C01B33/2884; B03D2201/00; B03D2201/002; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
A PROCESS FOR EFFECTING SEPARATION OF A CRYSTALLINE ALUMINOSILICATE ZEOLITE OF THE MOLECULAR SIEVE TYPE FROM AN AQUEOUS SALT SOLUTION OR FROM AN AQUEOUS SLURRY CONTAINING AMORPHOUS MATERIAL WITH WHICH SAID ZEOLITE IS INTERMIXED WHICH COMPRISES ADDING TO SUCH MIXTURE A SMALL AMOUNT, GENERALLY LESS THAN ABOUT 1 WEIGHT PERCENT, BASED ON SOLIDS CONTENT, OF N-CETYL, N-ETHYL MORPHILINIUM ETHOSULFATE, INTRODUCING A STREAM OF AIR INTO THE RESULTING COMPOSITE TO PRODUCE A FOAM CONTAINING SUSPENDED PARTICLES OF ZEOLITE AND COLLECTING AND DRYING THE FOAM SO PRODUCED TO OBTAIN PARTICLES OF SAID ZEOLITE SUBSTANTIALLY FREE OF OTHER COMPONENTS OF THE INITIAL MIXTURE.
Claim 2
Dependent Claim
100 words
A PROCESS FOR EFFECTING SEPARATION OF A CRYSTALLINE ALUMINOSILICATE ZEOLITE OF THE MOLECULAR SIEVE TYPE FROM AN AQUEOUS SALT SOLUTION OR FROM AN AQUEOUS SLURRY CONTAINING AMORPHOUS MATERIAL WITH WHICH SAID ZEOLITE IS INTERMIXED WHICH COMPRISES ADDING TO SUCH MIXTURE A SMALL AMOUNT, GENERALLY LESS THAN ABOUT 1 WEIGHT PERCENT, BASED ON SOLIDS CONTENT, OF N-CETYL, N-ETHYL MORPHILINIUM ETHOSULFATE, INTRODUCING A STREAM OF AIR INTO THE RESULTING COMPOSITE TO PRODUCE A FOAM CONTAINING SUSPENDED PARTICLES OF ZEOLITE AND COLLECTING AND DRYING THE FOAM SO PRODUCED TO OBTAIN PARTICLES OF SAID ZEOLITE SUBSTANTIALLY FREE OF OTHER COMPONENTS OF THE INITIAL MIXTURE.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the particle diameter of the crystalline aluminosilicate zeolite is less than about 1 micron.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the particle diameter of the crystalline aluminosilicate zeolite is between about 0.005 and about 0.1 micron.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is zeolite ZSM-5.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is zeolite Y.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is zeolite ZK-22.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein said aqueous salt solution is the mother liquor in which crystallization of said zeolite has occurred.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein said amorphous material and said zeolite are contained in a naturally occurring ore.
References Cited (Backward Citations)
US2132902A
Cited
US2173909A
Cited
US2310315A
Cited
US2990958A
Cited
US3240556A
Cited
US3282416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |