US4416782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for separating oil from aqueous or solvent dispersions
Assignee: Girmes Werke AG
•
Filing: 1982-03-18
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Granted: 1983-11-22
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Expires: 2002-03-18
Abstract
Abstract For separating oil from aqueous or solvent dispersions the dispersion is passed through a porous flat-shaped textile article which comprises at least partly of oleophilic fibres each having a titer below 1 dtex. The flat-shaped textile article is preferably a three dimensional article, and can have a pile and possibly also a substrate comprising of extremely fine oleophilic artificial fibres. The pile threads and eventually also the threads of the substrate are split by means of a swelling agent into many extremely fine oleophilic fibres having a low titer. The small and very small oil drops in the dispersion are withheld on the extremely fine oleophilic fibres and coalesce to larger oil droplets or oil drops which rise to the surface of the liquid due to their lower density than the liquid. The oil can be easily removed from the surface of the liquid.
Inventors
- 👤 Bruno Kerres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:28
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/045; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A method for separating oil from oil bearing aqueous or solvent liquid dispersions wherein the oil has a lower density than the liquid dispersions, said method being characterized in that an oil containing liquid disperson is passed through a porous textile flat-shaped article having upstanding free ended piles formed at least partly of oleophilic fibers each having a titer between 0.05 and about 0.5 dtex whereby very small oil drops having a diameter of about 1 to 30 microns in the dispersions are withheld on the oleophilic fibers and coalesce to larger oil droplets which rise to the surface of the liquid dispersions due to their lower density than the liquid dispersions, the said porous textile article being thereby continuously and automatically cleaned by said coalescence from oil agglomerations, so that the fibers are always prepared for new coalescing actions.
Claim 2
Independent Claim
140 words
A method for separating oil from oil bearing aqueous or solvent liquid dispersions wherein the oil has a lower density than the liquid dispersions, said method being characterized in that an oil containing liquid disperson is passed through a porous textile flat-shaped article having upstanding free ended piles formed at least partly of oleophilic fibers each having a titer between 0.05 and about 0.5 dtex whereby very small oil drops having a diameter of about 1 to 30 microns in the dispersions are withheld on the oleophilic fibers and coalesce to larger oil droplets which rise to the surface of the liquid dispersions due to their lower density than the liquid dispersions, the said porous textile article being thereby continuously and automatically cleaned by said coalescence from oil agglomerations, so that the fibers are always prepared for new coalescing actions.
Claim 3
Independent Claim
173 words
An apparatus for separating oil from oil bearing aqueous or solvent liquid dispersions, said apparatus comprising a filter device and means for delivering an oil bearing dispersion through said filter device in a predetermined direction, said filter device being characterized in that it comprises a porous textile flat-shaped article having upstanding free ended piles extending in the direction of dispersion flow and for receiving dispersions, said piles being formed at least partly of oleophilic article fibers each having a titer between about 0.05 and about 0.5 dtex whereby very small oil drops having a diameter of about 1 to 30 microns in liquid dispersions are withheld on the oleophilic fibers and coalesce to larger oil droplets which rise to the surface of a liquid dispersion due to their lower density than the liquid dispersions, the said porous textile article being thereby continuously automatically cleaned by said coalescence from oil agglomerations, so that the fibers are always prepared for new coalescing actions, and means for withdrawing separately the separated oil and the remaining liquid.
Claim 4
Independent Claim
173 words
An apparatus for separating oil from oil bearing aqueous or solvent liquid dispersions, said apparatus comprising a filter device and means for delivering an oil bearing dispersion through said filter device in a predetermined direction, said filter device being characterized in that it comprises a porous textile flat-shaped article having upstanding free ended piles extending in the direction of dispersion flow and for receiving dispersions, said piles being formed at least partly of oleophilic article fibers each having a titer between about 0.05 and about 0.5 dtex whereby very small oil drops having a diameter of about 1 to 30 microns in liquid dispersions are withheld on the oleophilic fibers and coalesce to larger oil droplets which rise to the surface of a liquid dispersion due to their lower density than the liquid dispersions, the said porous textile article being thereby continuously automatically cleaned by said coalescence from oil agglomerations, so that the fibers are always prepared for new coalescing actions, and means for withdrawing separately the separated oil and the remaining liquid.
Claim 5
Dependent Claim
20 words
A device as claimed in claim 2, characterized in that said fibers are in the form of a fiber fleece.
Claim 6
Dependent Claim
22 words
A device as claimed in claim 2, characterized in that said flat-shaped textile article is a knitted or raschel knitted pile fabric.
Claim 7
Dependent Claim
23 words
A device as claimed in claim 4, characterized in that said piles of said pile fabric are formed of extremely fine oleophilic fibers.
Claim 8
Dependent Claim
25 words
A device as claimed in claim 2, characterized in that said flat-shaped textile article is a flat woven fabric having one or more woven layers.
Claim 9
Dependent Claim
25 words
A device as claimed in claim 2, characterized in that said flat-shaped textile article is a flat knitted fabric having one or more knitted layers.
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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 |