US4416798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsed regeneration of adsorption column
Assignee: WESTVACO Corp A CORP OF DE
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Filing: 1982-03-12
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Granted: 1983-11-22
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Expires: 2002-03-12
Abstract
Abstract An activated carbon adsorption column for the treatment of waste water is continuously sterilized and/or regenerated in pulsed batches of carbon amounting to 5 to 25 percent of the working column quantity transferred, alternately, from the influent face of the column to one of two, off-stream blow case vessels for steam processing and returned to the effluent face of the working column upon the next programmed pulsing interim.
Inventors
- 👤 Donald G. Hager
- 👤 Michael L. Massey
- 👤 Frederick Rubel, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:19
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; B01J20/30; B01J20/34; B01J20/3416; B01J20/345; B01J20/3458; B01J20/3466; B01J20/3475; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/36; B01J2220/00; B01J2220/50; B01J2220/58; C02F2303/00; C02F2303/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
A method of regenerating adsorptive material used in an adsorptive fluid treatment column comprising the steps of: A. delivering influent to one face of a vertical column of adsorptive material; B. withdrawing effluent from another face of said vertical column; C. periodically withdrawing from the one face of said column a fractional portion of spent adsorptive material and depositing same in a first ancillary pressure vessel; D. replenishing said column at the other face with a similar fractional portion of steam regenerated adsorptive material drawn from a second ancillary pressure vessel; and, E. regenerating said first vessel spent material with steam over the period between successive withdrawals of said material whereby the spent material portion in said first vessel withdrawn during a first transfer interim becomes the regenerated material portion supplied by said second vessel during a second, successive transfer interim.
Claim 2
Independent Claim
141 words
A method of regenerating adsorptive material used in an adsorptive fluid treatment column comprising the steps of: A. delivering influent to one face of a vertical column of adsorptive material; B. withdrawing effluent from another face of said vertical column; C. periodically withdrawing from the one face of said column a fractional portion of spent adsorptive material and depositing same in a first ancillary pressure vessel; D. replenishing said column at the other face with a similar fractional portion of steam regenerated adsorptive material drawn from a second ancillary pressure vessel; and, E. regenerating said first vessel spent material with steam over the period between successive withdrawals of said material whereby the spent material portion in said first vessel withdrawn during a first transfer interim becomes the regenerated material portion supplied by said second vessel during a second, successive transfer interim.
Claim 3
Dependent Claim
17 words
A method as described by claim 1 wherein said spent material regeneration is a steam sterilization process.
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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |