GB1299488A - Drying method and apparatus - Google Patents
Drying method and apparatusInfo
- Publication number
- GB1299488A GB1299488A GB2783870A GB2783870A GB1299488A GB 1299488 A GB1299488 A GB 1299488A GB 2783870 A GB2783870 A GB 2783870A GB 2783870 A GB2783870 A GB 2783870A GB 1299488 A GB1299488 A GB 1299488A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- carbon dioxide
- sample
- alcohol
- temperature
- 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
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
1299488 Critical point drying IMPERIAL CHEMICAL INDUSTRIES Ltd 25 May 1971 [9 June 1970] 27838/70 Heading A2D [Also in Division F4] The water in a biological sample 26 is replaced by ethyl alcohol (which is miscible with liquid carbon dioxide), the sample 26- is placed in a pressure vessel 10 (which is then sealed by valves 14 and 16), the vessel 10 is cooled to a temperature (e.g. O‹C by means of an ice-water bath or coils carrying cooling fluid) below the critical temperature (31‹C) of carbon dioxide, carbon dioxide gas is admitted from a cylinder 15 (at 20-25‹C) to the vessel 10 so that it condenses, fills the vessel 10, and replaces the alcohol in the sample, the vessel 10 is warmed to a temperature (e.g. 40‹C) above the critical temperature of carbon dioxide so that carbon dioxide gas is formed without a phase boundary passing through the sample, and the carbon dioxide gas is allowed to escape from the vessel 10 at a controlled rate, to produce the dried sample. The wet sample 26 (mounted on a slide) is initially passed through a series of water-alcohol baths of increasing alcohol content, placed in a depression 25, and covered with alcohol. The warming of the vessel 10 may be with a hot water bath, or coils carrying heating fluid, or electrical means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2783870A GB1299488A (en) | 1970-06-09 | 1970-06-09 | Drying method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2783870A GB1299488A (en) | 1970-06-09 | 1970-06-09 | Drying method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1299488A true GB1299488A (en) | 1972-12-13 |
Family
ID=10266133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2783870A Expired GB1299488A (en) | 1970-06-09 | 1970-06-09 | Drying method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1299488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0385759A2 (en) * | 1989-03-01 | 1990-09-05 | Terry Floyd | High temperature and high pressure digestion vessel assembly |
-
1970
- 1970-06-09 GB GB2783870A patent/GB1299488A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0385759A2 (en) * | 1989-03-01 | 1990-09-05 | Terry Floyd | High temperature and high pressure digestion vessel assembly |
| EP0385759A3 (en) * | 1989-03-01 | 1990-11-28 | Terry Floyd | High temperature and high pressure digestion vessel assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |