US3589023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for removing water from solid surfaces at low temperatures
Assignee: Honeywell International Inc
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Filing: 1969-06-10
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Granted: 1971-06-29
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Expires: 1989-06-10
Abstract
Abstract Process for removing water from a nonabsorbent article comprises immersing an article containing a water contaminated surface into a nonboiling solvent liquid bath which solvent is heavier than water and in which water is about 0.1-5 percent by weight soluble, to displace water therefrom, causing the displaced water and solvent to overflow into a separation zone wherein water is removed from the system and solvent is returned to the nonboiling solvent liquid bath, and removing the article from the nonboiling solvent liquid bath. A preferred solvent is an azeotropic mixture of about 97 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane and about 3 weight percent isopropanol. Apparatus comprises a dewatering sump adapted to contain a liquid at a temperature below its boiling point and in a substantially quiescent state, and preferably equipped with cooling means, a water separating sump possessing a smaller surface area than the dewatering sump adapted to receive liquid which overflows from the dewatering sump, means for removing water from the upper portion of the water separating sump and means for transferring liquid from the lower portion of the water separating sump to the dewatering sump.
Inventors
- 👤 Francis John Figiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:19
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/005; B; B01; B01D; B01D12/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
23 words
The method according to claim 1 in which the solvent is one in which water is between about 0.5-5 percent by weight soluble.
Claim 2
Dependent Claim
70 words
The method according to claim 2 in which the solvent contains at least one substantially water-immiscible halogenated hydrocarbon component boiling between about 0*-100* C. and having a density greater than about 1.3 gm./cm.3 at 20* C. and at least one nonhalogenated organic liquid miscible with the halogenated hydrocarbon component and with water which boils between about 0*-150* C. and has a density less than about 1.0 gm./cm.3 at 20* C.
Claim 3
Dependent Claim
30 words
The method according to claim 3 in which the solvent is a two component mixture in which the substantially water-immiscible component constitutes between about 80-99.5 weight percent of the mixture.
Claim 4
Dependent Claim
46 words
The method according to claim 4 in which the substantially water-immiscible component is a member of the group consisting of 1,1,2-trichloro-1,2,2-trifluoroethane and tetrachlorodifluoroethane and in which the water-miscible component is a member of the group consisting of methanol, ethanol, n-propanol, isopropanol, acetonitrilE, acetone, nitromethane and dioxane.
Claim 5
Dependent Claim
22 words
The method according to claim 5 in which the substantially water-immiscible component is 1,1,2-trichloro-1,2,2-trifluoroethane and in which the water-miscible component is isopropanol.
Claim 6
Dependent Claim
20 words
The method according to claim 6 in which the solvent mixture contains between about 90-98 weight percent of 1,1,2-trichloro-1, 2,2-trifluoroethane.
Claim 7
Dependent Claim
29 words
The method according to claim 7 in which the solvent mixture is an azeotropic mixture consisting of about 97 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane and about 3 weight percent isopropanol.
Claim 8
Dependent Claim
22 words
The method according to claim 5 in which the substantially water-immiscible component is 1,1,2-trichloro-1,2,2-trifluoroethane and in which the water-miscible component is ethanol.
Claim 9
Dependent Claim
22 words
The method according to claim 5 in which the substantially water-immiscible component is 1,1,2-trichloro-1,2,2-trifluoroethane and in which the water-miscible component is acetone.
Claim 10
Dependent Claim
97 words
Apparatus for the removal of water from nonabsorbent articles which comprises in combination: a. a dewatering sump adapted to contain a liquid at a temperature below its boiling point and free of means to create turbulence in liquid contained within said sump, b. a watering separating sump possessing a smaller surface area than the dewatering sump adapted to receive liquid which overflows from the dewatering sump, c. means for removing water from the upper portion of the water-separating sump, and d. means for transferring liquid from the lower portion of the water-separating sump to the dewatering sump.
Claim 11
Dependent Claim
98 words
Apparatus for the removal of water from nonabsorbent articles which consists essentially of in combination: a. a dewatering sump adapted to contain a liquid at a temperature below its boiling point and free of means to create turbulence in liquid contained within said sump, b. a water-separating sump possessing a smaller surface area than the dewatering sump adapted to receive liquid which overflows from the dewatering sump, c. means for removing water from the upper portion of the water-separating sump, and d. means for transferring liquid from the lower portion of the water-separating sump to the dewatering sump.
Claim 12
Dependent Claim
46 words
Apparatus according to claim 11 in which components (a) through (d) are contained within a single treatment vessel and in which the water-separating sump is positioned adjacent the dewatering sump so that liquid which overflows from the dewatering sump falls directly into the water separating sump.
Claim 13
Dependent Claim
19 words
Apparatus according to claim 13 in which the dewatering sump and the water-separating sump are equipped with cooling means.
Claim 14
Dependent Claim
38 words
Apparatus according to claim 14 in which the means for removing water from the water-separating sump is an overflow pipe and the means for removing liquid from the lower portion of the water-separating sump is a drain pipe.
Claim 15
Dependent Claim
28 words
Apparatus according to claim 15 in which the means for transferring the liquid from the water-separating sump to the dewatering sump includes a drying means and a reservoir.
Claim 16
Dependent Claim
47 words
Apparatus according to claim 16 in which the dewatering and water-separating sumps are essentially rectangular in shape and are positioned adjacently so that overflow of liquid from the dewatering sump to the water separating sump can take place only over a single wall of the dewatering sump.
References Cited (Backward Citations)
US3386181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |