Patent US2315898A successfully refreshed from Google Patents.
US3607003A
Expired / Lapsed
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Method of removing acetone and acidic gases from gaseous mixtures
Assignee: HRI Inc
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Filing: 1968-12-13
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Granted: 1971-09-21
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Expires: 1988-12-13
Abstract
Abstract A process for removal of acetone vapors and acidic gas contaminants from a purified hydrogen stream by contacting the stream with an aqueous solution of monoethanolamine when the partial pressure of the acidic gas contaminants is low such that the acidic gas carrying capacity of the monoethanolamine solution exceeds that of acetone.
Inventors
- 👤 Harold H Stotler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/526; B01D53/14; B01D53/1493
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
The process of claim 1 wherein the monoethanolamine solution is an aqueous solution that contains about 15 percent by weight of monoethanolamine.
Claim 2
Dependent Claim
31 words
The process of claim 1 wherein monoethanolamine is recovered from the monoethanolamine-acetone solution and the monoethanolamine solution is recycled for further contact with a stream of mixed gases that contains acetone.
References Cited (Backward Citations)
US2785045A
Cited
US3225519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |