Patent US4670156A successfully refreshed from Google Patents.
US4670156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorbent for oil or other liquid hydrocarbons
Assignee: UNIVERSAL FIBERS Inc A DE CORP
•
Filing: 1984-02-27
•
Granted: 1987-06-02
•
Expires: 2004-02-27
Abstract
Abstract Disclosed herein is a hydrophobic sorbent, particularly useful for the sorption of oil or other similar tacky or viscous hydrocarbons, which is prepared by subjecting a water-containing, fibrous cellulosic product, particularly sulphite reject fibers, to rapid heating to cause expansion of the fibers through gasification of the water therein. The sorbent is capable of exceptionally rapid and tight sorption and binding of even heavy oils.
Inventors
- 👤 Bo Grenthe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:47
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; B01J20/24; B01J20/28; B01J20/28014; B01J20/28023; B01J20/30; B01J20/3078; B01J20/32; B01J20/3202; B01J20/3206; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; C; C09; C09K; C09K3/00; C09K3/32; B01J2220/00; B01J2220/40; B01J2220/48; B01J2220/4812; B01J2220/4825; B01J2220/4831; B01J2220/4875; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
A method for removing oil or other liquid hydrocarbons from surfaces contaminated therewith, comprising contacting said oil or hydrocarbon with an amount of a sorbent material sufficient to substantially sorb the oil or hydrocarbon and to bind said oil or hydrocarbon within said sorbent to a degree which renders the oil- or hydrocarbon-laden sorbent essentially non-sticky, said sorbent material comprising the product obtained by subjecting a moisture-containing fibrous starting material, consisting essentially of a member selected from the group consisting of reject fibers obtained from the chemical pulping of wood according to a sulphite process, reject fibers obtained from the chemical pulping of wood according to a sulphate process, and mixtures thereof, to rapid heating at a temperature sufficient to expand the fibers through gasification of the moisture therein.
Claim 2
Independent Claim
129 words
A method for removing oil or other liquid hydrocarbons from surfaces contaminated therewith, comprising contacting said oil or hydrocarbon with an amount of a sorbent material sufficient to substantially sorb the oil or hydrocarbon and to bind said oil or hydrocarbon within said sorbent to a degree which renders the oil- or hydrocarbon-laden sorbent essentially non-sticky, said sorbent material comprising the product obtained by subjecting a moisture-containing fibrous starting material, consisting essentially of a member selected from the group consisting of reject fibers obtained from the chemical pulping of wood according to a sulphite process, reject fibers obtained from the chemical pulping of wood according to a sulphate process, and mixtures thereof, to rapid heating at a temperature sufficient to expand the fibers through gasification of the moisture therein.
Claim 3
Independent Claim
129 words
A method for removing oil or other liquid hydrocarbons from solid surfaces contaminated therewith, comprising contacting said oil or hydrocarbon with an amount of a sorbent material sufficient to sorb the oil or hydrocarbon and to bind said oil or hydrocarbon within said sorbent to a degree which renders the oil- or hydrocarbon-laden sorbent essentially non-sticky, said sorbent material comprising the product obtained by subjecting a moisture-containing fibrous starting material, consisting essentially of a member selected from the group consisting of reject fibers obtained from the chemical pulping of wood according to a sulphite process, reject fibers obtained from the chemical pulping of wood according to a sulphate process, and mixtures thereof, to rapid heating at a temperature sufficient to expand the fibers through gasification of the moisture therein.
Claim 4
Independent Claim
129 words
A method for removing oil or other liquid hydrocarbons from solid surfaces contaminated therewith, comprising contacting said oil or hydrocarbon with an amount of a sorbent material sufficient to sorb the oil or hydrocarbon and to bind said oil or hydrocarbon within said sorbent to a degree which renders the oil- or hydrocarbon-laden sorbent essentially non-sticky, said sorbent material comprising the product obtained by subjecting a moisture-containing fibrous starting material, consisting essentially of a member selected from the group consisting of reject fibers obtained from the chemical pulping of wood according to a sulphite process, reject fibers obtained from the chemical pulping of wood according to a sulphate process, and mixtures thereof, to rapid heating at a temperature sufficient to expand the fibers through gasification of the moisture therein.
Claim 5
Independent Claim
129 words
A method for removing oil or other liquid hydrocarbon from aqueous surfaces contaminated therewith, comprising contacting said oil or hydrocarbon with an amount of a sorbent material sufficient to sorb the oil or hydrocarbon and to bind said oil or hydrocarbon within said sorbent to a degree which renders the oil- or hydrocarbon-laden sorbent essentially non-sticky, said sorbent material comprising the product obtained by subjecting a moisture-containing fibrous starting material, consisting essentially of a member selected from the group consisting of reject fibers obtained from the chemical pulping of wood according to a sulphite process, reject fibers obtained from the chemical pulping of wood according to a sulphate process, and mixtures thereof, to rapid heating at a temperature sufficient to expand the fibers through gasification of the moisture therein.
Claim 6
Independent Claim
129 words
A method for removing oil or other liquid hydrocarbon from aqueous surfaces contaminated therewith, comprising contacting said oil or hydrocarbon with an amount of a sorbent material sufficient to sorb the oil or hydrocarbon and to bind said oil or hydrocarbon within said sorbent to a degree which renders the oil- or hydrocarbon-laden sorbent essentially non-sticky, said sorbent material comprising the product obtained by subjecting a moisture-containing fibrous starting material, consisting essentially of a member selected from the group consisting of reject fibers obtained from the chemical pulping of wood according to a sulphite process, reject fibers obtained from the chemical pulping of wood according to a sulphate process, and mixtures thereof, to rapid heating at a temperature sufficient to expand the fibers through gasification of the moisture therein.
Claim 7
Dependent Claim
28 words
A method according to claim 3 wherein said fibrous starting material consists essentially of reject fibers obtained from the chemical pulping of wood according to a sulphate process.
Claim 8
Independent Claim
24 words
A method according to claims 1, 2, 3 or 4 wherein said moisture-containing fibrous starting material contains at least about 10% moisture by weight.
Claim 9
Independent Claim
31 words
A method according to claims 1, 2, 3 or 4 wherein said rapid heating is conducted at a temperature in a range of from about 200° F. to about 1200° F.
Claim 10
Independent Claim
32 words
A method according to claims 1, 2, 3, or 4 wherein said rapid heating is effected by suspending said fibrous starting material in a stream of air heated to said sufficient temperature.
References Cited (Backward Citations)
DE1248197B
Cited
US3382170A
Cited
DE1519797A1
Cited
US3591524A
Cited
US3630891A
Cited
DE2212605A1
Cited
CA982951A
Cited
US3756948A
Cited
US3770575A
Cited
US4011159A
Cited
AT347362B
Cited
US4551253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |