US5082475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste air purification process
Assignee: Novartis Corp
•
Filing: 1989-04-25
•
Granted: 1992-01-21
•
Expires: 2009-04-25
Abstract
Abstract A novel waste air purification process based on a buffer unit/biofilter system and equipment for carrying out this process are described.
Inventors
- 👤 Rolf Bentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/025; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/84; B01D53/85; C02F3/10; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
50 words
A process for the disposal and purification of waste air loaded with pollutants, which comprises passing said waste air through a system consisting of at least one absorbent buffer and at least one biofilter, such that said pollutants are more or less uniformly released form said buffer into said biofilter.
Claim 2
Dependent Claim
50 words
A process for the disposal and purification of waste air loaded with pollutants, which comprises passing said waste air through a system consisting of at least one absorbent buffer and at least one biofilter, such that said pollutants are more or less uniformly released form said buffer into said biofilter.
Claim 3
Dependent Claim
25 words
A process according to claim 1, which comprises passing the waste air first through at least one buffer and then through at least one biofilter.
Claim 4
Dependent Claim
32 words
A process according to claim 1, which comprises passing the waste air first through at least one biofilter, then through at least one buffer and subsequently through at least one further biofilter.
Claim 5
Dependent Claim
39 words
A process according to claim 1, which comprises passing the waste air first through at least one buffer, then through at least one biofilter, subsequently through at least one further buffer and finally through at least one further biofilter.
Claim 6
Dependent Claim
25 words
A process according to claim 1, which comprises passing the waste air through a system which contains at least one device for moistening the biofilters.
Claim 7
Dependent Claim
16 words
A process according to claim 5, wherein said device is located upstream of a buffer/biofilter system.
Claim 8
Dependent Claim
27 words
A process according to claim 1, which comprises bringing the waste air to a temperature and pollutant concentration which are harmless to the microorganisms in the biofilters.
Claim 9
Dependent Claim
32 words
A process according to claim 1, wherein 1 m 3 of waste air of a pollutant concentration of up to 50 g is passed through per m3 of biofilter volume per hour.
Claim 10
Dependent Claim
47 words
A process according to claim 1 wherein said adsorbent used is active charcoal or animal charcoal, silica gel, kieselguhr, bleaching earth, an alumina, a molecular sieve, bauxite, glass, ceramics or a mixture and the absorbent used is a high-boiling organic liquid which is homogeneously miscible with water.
Claim 11
Dependent Claim
13 words
A process according to claim 1, wherein said adsorbent used is active charcoal.
Claim 12
Dependent Claim
20 words
A process according to claim 1, wherein the pollutants in the waste air are organic or inorganic compounds or mixtures.
Claim 13
Dependent Claim
13 words
A process according to claim 1 , wherein the pollutants are organic compounds.
Claim 14
Dependent Claim
45 words
A process according to claim 12 , wherein said organic compounds are hydrocarbons or halogenated hydrocarbons such as alkanes or cycloalkanes having 1 to 12 carbon atoms, or aromatics, aldehydes, ketones, ethers, carboxylic acid esters, sulfones, alcohols, thiols, nitro compounds or amino compounds, or mixtures.
Claim 15
Dependent Claim
41 words
A process according to claim 12, wherein said organic compounds are butane, pentane, octane, heptane, cyclohexane, cyclooctane, decalin, methylene chloride, benzene, toluene, phenol, xylene, chlorobenzene, dichlorobenzene, acetone, dioxane, sulfolan, tetrahydrofuran, methyl isobutyl ketone, methanol, ethanol, butanol, pyridine, dimethylformamide, acetonitrile or mixtures.
Claim 16
Dependent Claim
18 words
A process according to claim 1, wherein the pollutants in the waste air are gases, aerosols and vapors.
Claim 17
Independent Claim
44 words
An apparatus for the disposal and purification of waste air loaded wit pollutants, which comprise at least one adsorbant or absorbant buffer and at least one biofilter and means for passing said waste air through said buffer or buffers and at least one biofilter.
Claim 18
Independent Claim
44 words
An apparatus for the disposal and purification of waste air loaded wit pollutants, which comprise at least one adsorbant or absorbant buffer and at least one biofilter and means for passing said waste air through said buffer or buffers and at least one biofilter.
Claim 19
Dependent Claim
15 words
An apparatus according to claim 16, wherein the biofilter comprises a carrier material and microorganisms.
Claim 20
Dependent Claim
30 words
An apparatus according to claim 17, wherein said carrier material consists of compost, peat, earth, wood chips, plant residues selected from brushwood, straw, bark and heather, or a mixture thereof.
Claim 21
Dependent Claim
20 words
An apparatus according to claim 16, wherein at least one adsorbant or absorbant buffer is provided upstream of one biofilter.
Claim 22
Dependent Claim
20 words
An apparatus according to claim 16, wherein, upstream of the adsorbant or absorbant buffer, several biofilters are connected in parallel.
Claim 23
Dependent Claim
27 words
An apparatus according to claim 16, wherein, upstream of the absorbant or absorbant buffer, several biofilters are connected sequentially in the manner of a chest of drawers.
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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) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |