US4818345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation apparatus
Assignee: JOENSSON ANN SOFI
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Filing: 1986-06-16
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Granted: 1989-04-04
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Expires: 2006-06-16
Abstract
Abstract A distillation apparatus intended for distilling liquid, primarily water, comprising a distillation unit which includes a porous, hydrophobic membrane (2) which is pervious to steam, or vapor, but impervious to liquid, and a condensation surface (3) located at a distance from the membrane, such as to present an air gap (4) between the membrane and the condensation surface, the distillation apparatus further comprising units for conducting the liquid (20) to be distilled on the membrane surface remote from the air gap (4), and a unit for conducting a liquid (22) which is colder than the first mentioned liquid (20) on the side of the condensation surface (3) remote from the air gap (4). According to the invention the distance (L) between the membrane (2) and the condensation (3) lies in the range of about 0.2 mm-about 1 mm, and the thickness (b) of the membrane (2) is less than about 0.5 mm.
Inventors
- 👤 Ann-Sofi Jonsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:09
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/36; B01D61/364; Y; Y10; Y10S; Y10S159/00; Y10S159/27; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
Apparatus for distilling a liquid, comprising: a porous membrane, said membrane being pervious to vapor but impervious to liquid, and having a thickness of less than about 0.5 mm; a condensation surface spaced a predetermined distance apart from the membrane; an open gap between the membrane and the condensation surface, said open gap having a width of between about 0.2 mm and about 1.0 mm, said vapor diffusing only across said membrane and said open gap; means for supplying the liquid to be distilled to the surface of said membrane remote from the open gap; and means for maintaining the temperature of the condensation surface remote from the open gap at a lower temperature than the temperature of the liquid to be distilled.
Claim 2
Dependent Claim
123 words
Apparatus for distilling a liquid, comprising: a porous membrane, said membrane being pervious to vapor but impervious to liquid, and having a thickness of less than about 0.5 mm; a condensation surface spaced a predetermined distance apart from the membrane; an open gap between the membrane and the condensation surface, said open gap having a width of between about 0.2 mm and about 1.0 mm, said vapor diffusing only across said membrane and said open gap; means for supplying the liquid to be distilled to the surface of said membrane remote from the open gap; and means for maintaining the temperature of the condensation surface remote from the open gap at a lower temperature than the temperature of the liquid to be distilled.
Claim 3
Dependent Claim
16 words
The distillation apparatus of claim 1, wherein said membrane has a relative pore area exceeding 0.7.
Claim 4
Dependent Claim
16 words
The distillation apparatus of claim 2, wherein said membrane has a relative pore area exceeding 0.8.
Claim 5
Dependent Claim
24 words
The distillation apparatus of claim 1, wherein said membrane further includes a vapor impervious gap-maintaining spacer interposed between said condensation surface and the membrane.
Claim 6
Dependent Claim
24 words
The distillation apparatus of claim 2, wherein said membrane further includes a vapor impervious gap-maintaining spacer interposed between said condensation surface and the membrane.
Claim 7
Dependent Claim
11 words
The distillation apparatus of claim 4, wherein said spacer comprises fibers.
Claim 8
Dependent Claim
11 words
The distillation apparatus of claim 5, wherein said spacer comprises fibers.
Claim 9
Dependent Claim
129 words
Apparatus for distilling a liquid, comprising: a porous membrane, said membrane being pervious to vapor but impervious to liquid, and having a thickness of less than about 0.5 mm; a condensation surface spaced a predetermined distance apart from the membrane; an open gap between the membrane and the condensation surface, said open gap having a width of between about 0.2 mm and about 1.0 mm, said vapor diffusing only across said membrane and said open gap; means for supplying the liquid to be distilled to the surface of said membrane remote from the open gap; and means for supplying a coolant to the side of the condensation surface remote from the open gap, said coolant being at a lower temperature than the temperature of the liquid to be distilled.
Claim 10
Dependent Claim
129 words
Apparatus for distilling a liquid, comprising: a porous membrane, said membrane being pervious to vapor but impervious to liquid, and having a thickness of less than about 0.5 mm; a condensation surface spaced a predetermined distance apart from the membrane; an open gap between the membrane and the condensation surface, said open gap having a width of between about 0.2 mm and about 1.0 mm, said vapor diffusing only across said membrane and said open gap; means for supplying the liquid to be distilled to the surface of said membrane remote from the open gap; and means for supplying a coolant to the side of the condensation surface remote from the open gap, said coolant being at a lower temperature than the temperature of the liquid to be distilled.
Claim 11
Dependent Claim
19 words
The appartus of claim 1, wherein said open gap communicates with a channel for supplying air into the gap.
Claim 12
Dependent Claim
19 words
The apparatus of claim 8, wherein said open gap communicates with a channel for supplying air into the gap.
References Cited (Backward Citations)
US3266223A
Cited
US3878054A
Cited
US3563860A
Cited
US4391676A
Cited
US4545862A
Cited
US4620900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |