US5120694A
Expired / Lapsed
US
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Method of coating aluminum substrates with solid adsorbent
Assignee: Honeywell UOP LLC
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Filing: 1989-07-28
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Granted: 1992-06-09
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Expires: 2009-07-28
Abstract
Abstract Layered adsorbent-substrate composites are prepared by methods comprising heating the surface of an aluminum substrate, contacting the surface of the substrate with a slurry containing the adsorbent and a binder, and heating the coatings to form hardened surfaces which can have excellent adsorption and mechanical properties and have a variety of uses such as adsorbents in automobile mufflers and as desiccants in multiple pane windows.
Inventors
- 👤 Stephen R. Dunne
- 👤 Michael J. McKeon
- 👤 Alan P. Cohen
- 👤 Albert S. Behan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:09
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183; B01J20/0203; B01J20/0248; B01J20/28; B01J20/28002; B01J20/28004; B01J20/28014; B01J20/2803; B01J20/30; B01J20/3042; B01J20/3078; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3238; B01J20/3291; B01J20/3297; B01J2220/00; B01J2220/40; B01J2220/42; B01J2220/50; B01J2220/64
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
109 words
Method of coating a surface of an aluminum substrate with a layer of solid adsorbent selected from the group consisting of crystaline molecular sieves, activated alumina, and mixtures thereof which comprises heating said surface in an oxygen containing atmosphere to a temperature of at least about 200° C. and sufficient to enable bonding of the solid adsorbent to said surface, contacting the heated surface with a slurry comprising the adsorbent and a binder selected from the group consisting of volclay, kaolin, sepiolite, attapulgite, silicates, aluminates, activated alumina, and mixtures thereof in a suspending liquid to form a slurry-coated surface, and removing sufficient liquid to form an adsorbent coating thereon.
Claim 2
Dependent Claim
109 words
Method of coating a surface of an aluminum substrate with a layer of solid adsorbent selected from the group consisting of crystaline molecular sieves, activated alumina, and mixtures thereof which comprises heating said surface in an oxygen containing atmosphere to a temperature of at least about 200° C. and sufficient to enable bonding of the solid adsorbent to said surface, contacting the heated surface with a slurry comprising the adsorbent and a binder selected from the group consisting of volclay, kaolin, sepiolite, attapulgite, silicates, aluminates, activated alumina, and mixtures thereof in a suspending liquid to form a slurry-coated surface, and removing sufficient liquid to form an adsorbent coating thereon.
Claim 3
Dependent Claim
23 words
Method of claim 1 wherein the temperature sufficient to enable bonding of the said adsorbent to said surface is from about 250°-650° C.
Claim 4
Dependent Claim
12 words
Method of claim 2 wherein the temperature is from about 350°-650° C.
Claim 5
Dependent Claim
13 words
Method of claim 1 wherein the heating causes said surface to become oxidized.
Claim 6
Dependent Claim
17 words
Method of claim 1 wherein the oxygen containing atmosphere contains at least about 1 mol % oxygen.
Claim 7
Dependent Claim
11 words
Method of claim 5 wherein the oxygen containing atmosphere is air.
Claim 8
Dependent Claim
18 words
Method of claim 1 wherein the removing of sufficient liquid is accomplished by heating at an elevated temperature.
Claim 9
Dependent Claim
26 words
Method of claim 1 which further comprises heating the adsorbent coating at an elevated temperature and for a time sufficient to cause hardening of the coating.
Claim 10
Dependent Claim
21 words
Method of claim 8 wherein the temperature sufficient to cause hardening of the coated surface is greater than about 200° C.
Claim 11
Dependent Claim
15 words
Method of claim 9 wherein the temperature is from about 400° C. to 650° C.
Claim 12
Dependent Claim
20 words
Method of claim 8 wherein the time sufficient to cause hardening of the coated surface is at least 0.25 hours.
Claim 13
Dependent Claim
11 words
Method of claim 11 wherein the time is about 1 hour.
Claim 14
Dependent Claim
12 words
Method of claim 1 wherein the crystalline molecular sieve is a zeolite.
Claim 15
Dependent Claim
24 words
Method of claim 13 wherein the zeolite is selected from the group consisting of Zeolite A, Zeolite X, Zeolite Y, chabazite and mixtures thereof.
Claim 16
Dependent Claim
25 words
Method of claim 1 wherein the solid adsorbent and the binder in the slurry have a particle size of from about 1 to 500 microns.
Claim 17
Dependent Claim
22 words
Method of claim 1 wherein the aluminum substrate is selected from the group consisting of aluminum metal, aluminized steel, and aluminized ceramic.
Claim 18
Dependent Claim
130 words
Method of coating an aluminum surface with a layer of zeolite molecular sieve which comprises; (a) heating said surface in an oxygen containing atmosphere to a temperature of about 350°-650° C. and sufficient to form a heated, oxidized, surface, (b) contacting said heated, oxidized, surface with a slurry having solid materials comprising about 60 to 95 wt. % molecular sieve and about 5 to 40 wt % volclay binder, said solid materials comprising about 10 to 40 wt. % of the total weight of the slurry with the balance comprising a suspending liquid, to form a slurry-coated surface, and (c) heating the slurry coated surface to a temperature of from about 550°-650° C. for about 1 hour to remove sufficient liquid to form a coating thereon and cause hardening thereof.
Claim 19
Dependent Claim
130 words
Method of coating an aluminum surface with a layer of zeolite molecular sieve which comprises; (a) heating said surface in an oxygen containing atmosphere to a temperature of about 350°-650° C. and sufficient to form a heated, oxidized, surface, (b) contacting said heated, oxidized, surface with a slurry having solid materials comprising about 60 to 95 wt. % molecular sieve and about 5 to 40 wt % volclay binder, said solid materials comprising about 10 to 40 wt. % of the total weight of the slurry with the balance comprising a suspending liquid, to form a slurry-coated surface, and (c) heating the slurry coated surface to a temperature of from about 550°-650° C. for about 1 hour to remove sufficient liquid to form a coating thereon and cause hardening thereof.
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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) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |