GB495734A - Improvements in the dehumidification of gases and in compositions for absorbing water vapour - Google Patents
Improvements in the dehumidification of gases and in compositions for absorbing water vapourInfo
- Publication number
- GB495734A GB495734A GB2432637A GB2432637A GB495734A GB 495734 A GB495734 A GB 495734A GB 2432637 A GB2432637 A GB 2432637A GB 2432637 A GB2432637 A GB 2432637A GB 495734 A GB495734 A GB 495734A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mole
- bromide
- calcium
- lithium
- chloride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Gases (AREA)
Abstract
495,734. Drying gases; refrigerating. TENNANT, W. J. (Dow Chemical Co.) Sept. 6, 1937, No. 24326. [Classes 29 and 34 (i)] A method of dehumidifying a gas, such as air, comprises contacting the moist gas with an aqueous solution of a mixture of lithium bromide with one or more of the salts lithium chloride, calcium chloride, and calcium bromide in such proportions that the solution if saturated would have a lower vapour pressure than a saturated lithium bromide solution at the same temperature. The invention also comprises a method of cooling water by partial evaporation thereof under sub-atmospheric pressure, the water vapour being absorbed by an aqueous solution of a mixture of lithium bromide with one or more of the salts lithium chloride, calcium chloride and calcium bromide, in the same proportions as required for the method of dehumidifying a gas. The proportions of the salts from which the solutions can be made may be ascertained by the chart shown, in which the corner A represents one mole of calcium chloride, B one mole of calcium bromide, C one mole of lithium chloride and D one mole of lithium bromide. A point E, for example, represents a solute composition containing À3 mole of calcium chloride and À7 mole of calcium bromide. The curved lines or isobars 11, 12, 13, 14 are lines traced by a point representing solute compositions of solutions saturated at 90‹ F, all of which on the same curve have been found to have substantially the same vapour pressure. The solute compositions in the area between the two lines 11 representing the vapour pressure of 1À8 mm. and the intersected portions of the sides BD, CD, all produce solutions having a substantially lower vapour pressure than 2À1 mm. which is that of saturated lithium bromide solution at the same temperature. The lowest vapour pressures are obtained by the solutions, the solutes of which are indicated by points within the isobar 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2432637A GB495734A (en) | 1937-09-06 | 1937-09-06 | Improvements in the dehumidification of gases and in compositions for absorbing water vapour |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2432637A GB495734A (en) | 1937-09-06 | 1937-09-06 | Improvements in the dehumidification of gases and in compositions for absorbing water vapour |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB495734A true GB495734A (en) | 1938-11-18 |
Family
ID=10209940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2432637A Expired GB495734A (en) | 1937-09-06 | 1937-09-06 | Improvements in the dehumidification of gases and in compositions for absorbing water vapour |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB495734A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991015284A1 (en) * | 1990-04-03 | 1991-10-17 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Membrane separation process for dehydrating a gas or vapour or liquid mixture by pervaporation, vapour permeation or gas separation |
| GB2252738A (en) * | 1991-02-14 | 1992-08-19 | Mountain Breeze Ltd | Dehumidifier |
| CN114874753A (en) * | 2021-07-29 | 2022-08-09 | 东南大学 | Saturated vapor pressure temperature sensitive dehumidifying solution |
-
1937
- 1937-09-06 GB GB2432637A patent/GB495734A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991015284A1 (en) * | 1990-04-03 | 1991-10-17 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Membrane separation process for dehydrating a gas or vapour or liquid mixture by pervaporation, vapour permeation or gas separation |
| GB2252738A (en) * | 1991-02-14 | 1992-08-19 | Mountain Breeze Ltd | Dehumidifier |
| CN114874753A (en) * | 2021-07-29 | 2022-08-09 | 东南大学 | Saturated vapor pressure temperature sensitive dehumidifying solution |
| CN114874753B (en) * | 2021-07-29 | 2024-05-10 | 东南大学 | Saturated vapor pressure temperature-sensitive dehumidifying solution |
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