US4603040A
Expired / Lapsed
US
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Massive bodies of Maximum Aluminum X-type zeolite
Assignee: Air Products and Chemicals Inc
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Filing: 1985-03-27
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Granted: 1986-07-29
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Expires: 2005-03-27
Abstract
Abstract Maximum Aluminum X-type zeolite is prepared in the form of essentially binderless aggregates. In the optimal case, the composition possesses the maximum theoretical zeolite cation content in a wide-pored zeolite as a solid, massive body.
Inventors
- 👤 Steven M. Kuznicki
- 👤 Charles G. Coe
- 👤 Richard J. Jenkins
- 👤 Stephen A. Butter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/082; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/30; B01J20/3007; B01J20/3028; B01J20/305; B01J20/3064; B01J20/3085; C; C01; C01B; C01B39/00; C01B39/02; C01B39/20; C01B39/22; B01J2220/00; B01J2220/40; B01J2220/42; B01J37/00; B01J37/0009; B01J37/0018; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
13 words
A macroscopic monolithic body of self-bound zeolite comprising substantially Maximum Aluminum X-type zeolite.
Claim 2
Dependent Claim
13 words
A macroscopic monolithic body of self-bound zeolite comprising substantially Maximum Aluminum X-type zeolite.
Claim 3
Dependent Claim
32 words
The body of claim 1 wherein said body is also comprised of at least some A-type zeolite and contains at least as much Maximum Aluminum X-type zeolite as it contains A-type zeolite.
Claim 4
Dependent Claim
24 words
The body of claim 2 wherein said body contains at least nine times as much Maximum Aluminum X-type zeolite as it contains A-type zeolite.
Claim 5
Dependent Claim
149 words
A process for making self-bound monolithic bodies of Maximum Aluminum X-type zeolite from kaolin preforms including the steps of: (a) extruding a mixture, including kaolin and from 10 to 30% of a pore-forming material into a preform body; (b) removing substantially all of said pore-forming material from said preform, thereby creating voids wihin said body; (c) heating said body to a temperature above 600° C. for a period of sufficient duration to permit substantially complete conversion of said kaolin to meta kaolin; (d) placing said body in an aqueous solution of NaOH and KOH such that the solution has an overall composition in the range: (Na.sub.2 O+K.sub.2 O) / SiO.sub.2 =2.0-5.0 Na.sub.2 /(Na.sub.2 O+K.sub.2 O) =0.10-0.90 H.sub.2 O/(Na.sub.2 O+K.sub.2 O) =5-50 (e) crystallizing in situ zeolites in said body with agitation at a temperature at or above 50° C. for a period of from 0.5 hours to 48 hours.
Claim 6
Dependent Claim
149 words
A process for making self-bound monolithic bodies of Maximum Aluminum X-type zeolite from kaolin preforms including the steps of: (a) extruding a mixture, including kaolin and from 10 to 30% of a pore-forming material into a preform body; (b) removing substantially all of said pore-forming material from said preform, thereby creating voids wihin said body; (c) heating said body to a temperature above 600° C. for a period of sufficient duration to permit substantially complete conversion of said kaolin to meta kaolin; (d) placing said body in an aqueous solution of NaOH and KOH such that the solution has an overall composition in the range: (Na.sub.2 O+K.sub.2 O) / SiO.sub.2 =2.0-5.0 Na.sub.2 /(Na.sub.2 O+K.sub.2 O) =0.10-0.90 H.sub.2 O/(Na.sub.2 O+K.sub.2 O) =5-50 (e) crystallizing in situ zeolites in said body with agitation at a temperature at or above 50° C. for a period of from 0.5 hours to 48 hours.
Claim 7
Dependent Claim
32 words
The process of claim 4 wherein said solution containing said body of step (d) is aged at a temperature below 50° C. for a period of from 20 hours to 200 hours.
Claim 8
Dependent Claim
14 words
The process of claim 5 wherein the aging period is carried out with agitation.
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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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |