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US5084427A
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Aqueous suspensions of aluminosilicate molecular sieves
Assignee: Honeywell UOP LLC
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Filing: 1990-10-22
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Granted: 1992-01-28
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Expires: 2010-10-22
Abstract
Abstract Stable aqueous suspensions of crystalline aluminosilicate molecular sieve particles, particularly hydrophobic crystalline siliceous molecular sieves, are provided in compositions having a consistency ranging from thin lotions to semi-solid "stick" formulations. The aqueous suspensions are maintained using hydrophilic colloids, particularly a mixture of a colloidal magnesium silicate having the structure of smectite and an alkali metal salt of the carboxymethoxy ether of cellulose.
Inventors
- 👤 Michael C. Tsoucalas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:54
CPC Classifications
A; A61; A61Q; A61Q15/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61L; A61L9/00; A61L9/01; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
Composition suitable for eliminating organic odors by contact with the odor source which comprises a suspension of particles of crystalline molecular sieves in an aqueous medium comprising water, a colloidal magnesium silicate having the structure of smectite and an alkali metal salt of the carboxymethoxy ether of cellulose.
Claim 2
Dependent Claim
48 words
Composition suitable for eliminating organic odors by contact with the odor source which comprises a suspension of particles of crystalline molecular sieves in an aqueous medium comprising water, a colloidal magnesium silicate having the structure of smectite and an alkali metal salt of the carboxymethoxy ether of cellulose.
Claim 3
Dependent Claim
56 words
Composition according to claim 1 wherein the particles of crystalline molecular sieves are hydrophobic siliceous molecular sieves, have particle sizes in the range of 1.5 to 20 micrometers and are present in an amount of from about 1 to about 75 parts by weight on the basis that the molecular sieves are in the anhydrous state.
Claim 4
Dependent Claim
40 words
Composition according to claim 2 wherein the crystalline hydrophobic siliceous molecular sieve particles are present in an amount of from about 5 to about 50 parts by weight on the basis that the molecular sieves are in the anhydrous state.
Claim 5
Dependent Claim
22 words
Composition according to claim 3 wherein the hydrophobic crystalline siliceous molecular sieves have particles in the range of 1.5 to 6.0 micrometers.
Claim 6
Dependent Claim
16 words
Composition according to claim 1 wherein the colloidal magnesium silicate is a colloidal magnesium aluminum silicate.
Claim 7
Dependent Claim
35 words
Composition according to claim 5 wherein the alkali metal salt carboxymethoxy ether of cellulose is the sodium salt and has a DP of from 200 to 1000 and a DS of from 0.38 to 1.45.
Claim 8
Dependent Claim
24 words
Composition according to claim 5 wherein the colloidal magnesium aluminum silicate is present in an amount of from 0.45 to 2.5 parts by weight.
Claim 9
Dependent Claim
23 words
Composition according to claim 6 wherein the DS of the sodium carboxymethoxy ether of cellulose is within the range of 0.65 to 0.90.
Claim 10
Dependent Claim
43 words
Process for imparting particles of a hydrophobic crystalline siliceous molecular sieve to a surface which comprises incorporating said particle into an aqueous suspension having a composition according to claim 1, applying said suspension to said surface and removing the aqueous constituent by evaporation.
Claim 11
Dependent Claim
18 words
Process according to claim 8 wherein the surface to which the particles are applied is a fibrous surface.
Claim 12
Dependent Claim
80 words
Process for preparing a composition of claim 1 which comprises providing an aqueous medium, imparting to said aqueous medium a colloidal magnesium silicate having the structure of smectite and maintaining the resulting composition until the silicate is swelled and completely hydrated, adding an alkali metal salt of a carboxymethoxy ether of cellulose to the aqueous medium containing the silicate and maintaining the resultant composition until the ether is swelled and completely hydrated and thereafter adding the particles of molecular sieve.
References Cited (Backward Citations)
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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) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |