US5346535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of crystalline molecular sieves containing charged octahedral sites in removing volatile organic compounds from a mixture of the same
Assignee: BASF Catalysts LLC
•
Filing: 1991-08-23
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Granted: 1994-09-13
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Expires: 2011-08-23
Abstract
Abstract Crystalline molecular sieves containing octahedral sites such as the sieves known as ETS-4, ETS-10 and ETAS-10 are used to remove volatile organic compounds from a mixture of the same with moist air at ambient temperature.
Inventors
- 👤 Steven M. Kuznicki
- 👤 Dinh Dang
- 👤 David T. Hayhurst
- 👤 Kathleen A. Thrush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
A cyclic process for the removal of volatile organic compounds from a mixture of the same with moist gas stream wherein said mixture is adsorbed at ambient temperature or substantially ambient temperature and is subsequently desorbed which comprises contacting said mixture with a molecular sieve containing octahedrally coordinated active sites and thereafter thermally regenerating said sieve at temperatures up to 150° C.
Claim 2
Dependent Claim
62 words
A cyclic process for the removal of volatile organic compounds from a mixture of the same with moist gas stream wherein said mixture is adsorbed at ambient temperature or substantially ambient temperature and is subsequently desorbed which comprises contacting said mixture with a molecular sieve containing octahedrally coordinated active sites and thereafter thermally regenerating said sieve at temperatures up to 150° C.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said gas stream is air.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein desorption takes place by changing the pressure.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein said process comprises a pressure swing.
Claim 6
Dependent Claim
20 words
The process of claim 2 wherein said sieve is ETS-4, ETS-10 and ETAS-10 and chemically modified versions and mixtures thereof.
Claim 7
Dependent Claim
18 words
The process of claim 2 wherein said desorption is caused by passing a fluid through said molecular sieve.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said process comprises a temperature swing.
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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) | 1997-09-12 | 1998-03-14 | 1998-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-12 | 2002-03-14 | 2002-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-12 | 2006-03-14 | 2006-09-13 | $7700.00 | Window Closed / Lapsed |