US3260035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recovering sulfur dioxide from a gas stream
Assignee: Iowa State University Research Foundation Inc
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Filing: 1963-04-29
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Granted: 1966-07-12
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Wheelock
- 👤 David R Boylan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:05
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN THE PREPARATION OF SULFUR DIOXIDE, THE METHOD OF REMOVING DUST AND WATER FROM A WARM GAS STREAM CONTAINING SULFUR DIOXIDE, WATER VAPOR, AND DUST, THE STEPS OF: (A) SCRUBBING SAID STREAM CONTERCURRENTLY WITH LIQUID WATER AT A TEMPERATURE HIGH ENOUGH TO MAINTAIN MOST OF SAID WATER VAPOR IN SAID GAS STREAM AS VAPOR AND REMOVING SAID DUST WITH THE LIQUID SCRUB WATER; (B) CONDENSING SAID WATER VAPOR IN THE SCRUBBED GAS STREAM IN A CONDENSER TO REDUCE THE WATER CONTENT OF SAID SCRUBBED GAS STREAM AND SEPARATING SAID GASEOUS SULFUR DIOXIDE FROM THE CONDENSED WATER TO PROVIDE LIQUID WATER FOR SAID SCRUBBING STEP; AND (C) UTILIZING SAID CONDENSED AND SEPARATED WATER AS AT LEAST THE MAJOR SOURCE OF THE LIQUID WATER FOR SAID SCRUBBING STEP; WHEREBY THE DUST AND WATER CONTENT OF THE SULFUR DIOXIDE CAN BE EFFECTIVELY REDUCED WITH A MINIMUM LOSS OF SULFUR DIOXIDE.
Claim 2
Dependent Claim
147 words
IN THE PREPARATION OF SULFUR DIOXIDE, THE METHOD OF REMOVING DUST AND WATER FROM A WARM GAS STREAM CONTAINING SULFUR DIOXIDE, WATER VAPOR, AND DUST, THE STEPS OF: (A) SCRUBBING SAID STREAM CONTERCURRENTLY WITH LIQUID WATER AT A TEMPERATURE HIGH ENOUGH TO MAINTAIN MOST OF SAID WATER VAPOR IN SAID GAS STREAM AS VAPOR AND REMOVING SAID DUST WITH THE LIQUID SCRUB WATER; (B) CONDENSING SAID WATER VAPOR IN THE SCRUBBED GAS STREAM IN A CONDENSER TO REDUCE THE WATER CONTENT OF SAID SCRUBBED GAS STREAM AND SEPARATING SAID GASEOUS SULFUR DIOXIDE FROM THE CONDENSED WATER TO PROVIDE LIQUID WATER FOR SAID SCRUBBING STEP; AND (C) UTILIZING SAID CONDENSED AND SEPARATED WATER AS AT LEAST THE MAJOR SOURCE OF THE LIQUID WATER FOR SAID SCRUBBING STEP; WHEREBY THE DUST AND WATER CONTENT OF THE SULFUR DIOXIDE CAN BE EFFECTIVELY REDUCED WITH A MINIMUM LOSS OF SULFUR DIOXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |