GB1005087A - Improvements in or relating to the extraction of liquid mixtures - Google Patents
Improvements in or relating to the extraction of liquid mixturesInfo
- Publication number
- GB1005087A GB1005087A GB2258962A GB2258962A GB1005087A GB 1005087 A GB1005087 A GB 1005087A GB 2258962 A GB2258962 A GB 2258962A GB 2258962 A GB2258962 A GB 2258962A GB 1005087 A GB1005087 A GB 1005087A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- flow
- plates
- rest
- period
- 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
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0426—Counter-current multistage extraction towers in a vertical or sloping position
- B01D11/043—Counter-current multistage extraction towers in a vertical or sloping position with stationary contacting elements, sieve plates or loose contacting elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0484—Controlling means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
In a countercurrent liquid-liquid extraction process in a column comprising perforated plates arranged one below the other, the liquids are fed alternately, each liquid flowing only when flow of the other is interrupted and each liquid flowing in the form of discrete drops so that phase separation occurs between each pair of plates. The flow ratio of one liquid to the other may be controlled by different flow times and/or by different pressures. The period of rest of each liquid is preferably longer than the period of flow of the other, the difference being as small as possible but generally at least 0.2 second, and the times of flow and rest should be such that a permanent emulsion is not formed. The lighter liquid should not wet the upper surfaces of the perforated plates nor the heavier liquid the lower surfaces, suitable varnishes being used if necessary and the distance between plates should be at least 5 times the diameter of liquid drops formed, e.g. about 50 mm. It is also useful for the holes in the plates to be conical in shape, narrower at the top than the bottom. In an example a benzene/acetone mixture is contacted with water to obtain benzene of reduced acetone content.ALSO:In a countercurrent liquid-liquid extraction process in a column comprising perforated plates arranged one below the other, the liquids are fed alternately, each liquid flowing only when flow of the other is interrupted and each liquid flowing in the form of discrete drops so that phase separation occurs between each pair of plates. The flow ratio of one liquid to the other may be controlled by different flow times and/or by different pressures. The period of rest of each liquid is preferably longer than the period of flow of the other, the difference being as small as possible but generally at least 0,2 second, and the times of flow and rest should be such that a permanent emulsion is not formed. The lighter liquid should not wet the upper surfaces of the perforated plates nor the heavier liquid the lower surfaces, suitable varnishes being used if necessary and the distance between plates should be at least five times the diameter of liquid drops formed, e.g. about 50 mm. It is also useful for the holes in the plates to be conical in shape, narrower at the top than the bottom. In an example a benzene/acetone mixture is contacted with water to obtain benzene of reduced acetone content.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST017945 | 1961-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1005087A true GB1005087A (en) | 1965-09-22 |
Family
ID=7457661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2258962A Expired GB1005087A (en) | 1961-06-13 | 1962-06-12 | Improvements in or relating to the extraction of liquid mixtures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1005087A (en) |
-
1962
- 1962-06-12 GB GB2258962A patent/GB1005087A/en not_active Expired
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