US4623529A
Expired / Lapsed
US
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Method of making a zeolite of the clinoptilolite type by seeding
Assignee: Albemarle Corp
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Filing: 1985-09-16
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Granted: 1986-11-18
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Expires: 2005-09-16
Abstract
Abstract The present invention is directed to the preparation of a synthetic crystalline zeolite of the clinoptilolite type wherein a solid amorphous silica, an alumina source, sodium hydroxide, a seed clinoptilolite and water are mixed together, heated, refluxed, then filtered and a synthetic crystalline zeolite of the clinoptilolite type obtained.
Inventors
- 👤 Robert N. Sanders
- 👤 Sebastian M. Laurent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:18
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2869
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
96 words
A method of producing a synthetic crystalline zeolite of the clinoptilolite type as indicated by diffraction data as set forth in table "A", comprising mixing a finely ground solid amorphous silica and an alumina source, caustic and a seed amount of clinoptilolite to provide a reaction mixture of (2.1±0.5)Na 2 OAl 2 O 3 (10.0±2.0)SiO 2 (110.1±50.0)H 2 O, heating the mixture to a temperature of about 100° C.-200° C. for up to about 240 hours, thereby forming a synthetic crystalline zeolite of said clinoptilolite type, and recovering said synthetic crystalline zeolite of said clinoptilolite type.
Claim 2
Independent Claim
96 words
A method of producing a synthetic crystalline zeolite of the clinoptilolite type as indicated by diffraction data as set forth in table "A", comprising mixing a finely ground solid amorphous silica and an alumina source, caustic and a seed amount of clinoptilolite to provide a reaction mixture of (2.1±0.5)Na 2 OAl 2 O 3 (10.0±2.0)SiO 2 (110.1±50.0)H 2 O, heating the mixture to a temperature of about 100° C.-200° C. for up to about 240 hours, thereby forming a synthetic crystalline zeolite of said clinoptilolite type, and recovering said synthetic crystalline zeolite of said clinoptilolite type.
Claim 3
Dependent Claim
24 words
The method of claim 1, wherein the seed clinoptilolite is added in an amount of about 1% to 20% by weight of the mixture.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein the seed clinoptilolite is obtained from a previously prepared bulk synthetic zeolite of said clinoptilolite type.
Claim 5
Dependent Claim
16 words
The method of claim 1, wherein the heating period is about 12 hour to 160 hours.
Claim 6
Dependent Claim
22 words
The method of claim 1, wherein the mixture is heated to about 135° C.-140° C. for a period of about 72-100 hours.
Claim 7
Dependent Claim
13 words
The method of claim 1, wherein the seed clinoptilolite is a natural clinoptilolite.
Claim 8
Dependent Claim
16 words
The method of claim 1, wherein the reaction system is as follows: 2.1Na.sub.2 O.Al.sub.2 O.sub.3.10.0SiO.sub.2.110.1H.sub.2 O.
Claim 9
Dependent Claim
16 words
The method of claim 1, wherein the reaction system is as follows: 2.1Na.sub.2 O.Al.sub.2 O.sub.3.10.7SiO.sub.2.109H.sub.2 O.
Claim 10
Dependent Claim
12 words
The method of claim 1, wherein the alumina source is alumina trihydrate.
Claim 11
Dependent Claim
12 words
The method of claim 1, wherein the alumina source is sodium aluminate.
Claim 12
Dependent Claim
17 words
The method of claim 1, wherein the mixture is heated to about 120° C. to 175° C.
Claim 13
Dependent Claim
17 words
The method of claim 1, wherein the mixture is heated to about 130° C. to 145° C.
Claim 14
Dependent Claim
16 words
The method of claim 1, wherein the heating period is about 40 hours to 120 hours.
Claim 15
Dependent Claim
16 words
The method of claim 1, wherein the heating period is about 72 hours to 100 hours.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |