US4196305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removal of phenols from dilute aqueous solutions thereof
Assignee: Chevron USA Inc
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Filing: 1978-08-10
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Granted: 1980-04-01
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Expires: 1998-08-10
Abstract
Abstract A process is disclosed for removing phenols from dilute aqueous solutions thereof. The method consists of contacting the aqueous phenol solution with a mass of olefin polymer fibrils which absorb the phenol from the aqueous solution. Water treated by the method does not give a characteristic phenol color when tested with ferric chloride.
Inventors
- 👤 Clarence R. Murphy
- 👤 S. Paul Thackaberry
- 👤 Robert E. Boehme, deceased
- 👤 legal representative by Helen J. Boehme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:51
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/285
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A process for removing a water-soluble phenol from an aqueous solution thereof containing less than 1 weight % of said phenol which consists essentially of passing said aqueous phenol solution through a column packed with a mass of olefin polymer fibrils; said olefin polymer being selected from the group consisting of: a. an ethylene homopolymer, b. a copolymer containing at least 90 weight % of polymerized ethylene and the balance a polymerized olefin hydrocarbon containing at least 4 carbon atoms, c. a propylene homopolymer, d. a copolymer containing at least 50 weight % of polymerizd propylene and the balance polymerized ethylene; and e. a mixture of any of (a), (b), (c), and (d) said fibrils having been prepared by precipitating an olefin polymer from an organic solvent solution thereof under conditions of high shear.
Claim 2
Dependent Claim
134 words
A process for removing a water-soluble phenol from an aqueous solution thereof containing less than 1 weight % of said phenol which consists essentially of passing said aqueous phenol solution through a column packed with a mass of olefin polymer fibrils; said olefin polymer being selected from the group consisting of: a. an ethylene homopolymer, b. a copolymer containing at least 90 weight % of polymerized ethylene and the balance a polymerized olefin hydrocarbon containing at least 4 carbon atoms, c. a propylene homopolymer, d. a copolymer containing at least 50 weight % of polymerizd propylene and the balance polymerized ethylene; and e. a mixture of any of (a), (b), (c), and (d) said fibrils having been prepared by precipitating an olefin polymer from an organic solvent solution thereof under conditions of high shear.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which the olefin polymer fibril is an ethylene polymer fibril.
Claim 4
Dependent Claim
17 words
The process of claim 2 in which the ethylene polymer fibril bears a coating of polyvinyl alcohol.
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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |