GB845131A - A process and apparatus for the aftertreatment of chemical substances - Google Patents
A process and apparatus for the aftertreatment of chemical substancesInfo
- Publication number
- GB845131A GB845131A GB37698/57A GB3769857A GB845131A GB 845131 A GB845131 A GB 845131A GB 37698/57 A GB37698/57 A GB 37698/57A GB 3769857 A GB3769857 A GB 3769857A GB 845131 A GB845131 A GB 845131A
- Authority
- GB
- United Kingdom
- Prior art keywords
- container
- filter
- liquid
- residues
- crystals
- 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
- 238000000034 method Methods 0.000 title abstract 4
- 239000000126 substance Substances 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 abstract 10
- 239000013078 crystal Substances 0.000 abstract 7
- 238000000605 extraction Methods 0.000 abstract 4
- 239000000725 suspension Substances 0.000 abstract 4
- 238000006243 chemical reaction Methods 0.000 abstract 3
- 239000000706 filtrate Substances 0.000 abstract 3
- 238000001914 filtration Methods 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- 239000002250 absorbent Substances 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000006149 azo coupling reaction Methods 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 238000010828 elution Methods 0.000 abstract 1
- 239000013067 intermediate product Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
- B01D29/41—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
- B01D29/416—Filtering tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
845,131. Filters; systems of filtration. MULLER, H. K. Dec. 3, 1957 [Dec. 7, 1956; Jan. 8, 1957 ; May 13, 1957], No. 37698/57. Class 46. In the after-treatment of chemical substances which have been separated out from their carrier liquid as residues by filtration, the residues are loosened from the filter elements by centrifugal force, a fresh supply of liquid is added to them to take up at least part of the residues, and the liquid and the residues taken up by it - are discharged into one or more containers connected to the filter, are subsequently returned to the filter after carrying out one or more chemical reactions or physical treating steps in the containers, and are finally filtered off. "Taking up" may be as a suspension or solution. In one process mixture from one (e.g. 19) of the containers 19 to 22 is withdrawn through valve 8 by pump 23 and forced at 4 (valve 15 being closed) into a casing 1, filtrate flowing out at 5 into another of the containers. After filtration the filter elements 3 are rotated to remove the residues centrifugally, optionally with the assistance of gas or liquid means. Next, washing liquid from container 20 is passed through the filter, the driving motor 24 being switched on and off periodically, and finally returned to 20. Then liquid in which the residues are to be suspended is pumped from container 21 to the filter, the filter elements being rotated meanwhile, the suspension finally being returned to container 21 (or another container) by reverse running of pump 23 or by gas under pressure. In the maunfacture of dyestuffs a diazo coupling and precipitation reaction may be carried out in one of the containers to which a suspension of an intermediate product has been passed from the filter. Reagents, and ice to keep the mixture cool, are added to the container. Such reactions may take place in the filter itself. In a re-crystallizing process suspension from container 19 is cyclically filtered until a clear filtrate is obtained in container 19. Liquid remaining in the filter 1 is forced back into 19 through valves 18 and 7 by compressed air introduced at 32, other valves being closed, and the crystal residues remaining on the elements. Gas to dry the crystals is now forced through valve 6 and pipe 5, and then they are washed by liquid from container 20. The filter is emptied of liquid and the crystals dried again, as before. Hot liquid from container 21 is next introduced in to the filter to re-dissolve the crystals, further heat being provided by a steam jacket 23. The solution is thereafter cooled and re-crystallized (either in the filter or in container 21) and again filtered and washed. The crystals are dried by air, optionally hot, supplied at 30, or by vacuum applied at 29 or 5. Finally the crystals are centrifuged off the elements, gas is supplied at a nozzle 26 from a pipe 25, and the crystals are discharged at 28 by a gas injector 34. In a countercurrent extraction process the first filtrate (extract), from mixture supplied in the first instance from container 19, is received in container 20. A second extraction is carried out from container 21, the extract being passed to container 20. Pure solvent from container 22 is used for a third extraction, the resulting extract passing to container 21 for further use. The contents of container 20 are withdrawn for further processing. The residue left in the filter after the extractions is removed by centrifuging. The apparatus may be used for repeated absorption and elution processes using an absorbent.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH845131X | 1956-12-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB845131A true GB845131A (en) | 1960-08-17 |
Family
ID=4541732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB37698/57A Expired GB845131A (en) | 1956-12-07 | 1957-12-03 | A process and apparatus for the aftertreatment of chemical substances |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB845131A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3482693A (en) * | 1965-11-18 | 1969-12-09 | Mueller Hans | Method and arrangement for separating solid material from a viscous substance |
US10295447B2 (en) | 2017-07-10 | 2019-05-21 | Cem Corporation | Rapid energized dispersive solid phase extraction (SPE) for analytical analysis |
US10330573B2 (en) | 2017-07-10 | 2019-06-25 | Cem Corporation | Rapid sample preparation for analytical analysis using dispersive energized extraction |
-
1957
- 1957-12-03 GB GB37698/57A patent/GB845131A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3482693A (en) * | 1965-11-18 | 1969-12-09 | Mueller Hans | Method and arrangement for separating solid material from a viscous substance |
US10295447B2 (en) | 2017-07-10 | 2019-05-21 | Cem Corporation | Rapid energized dispersive solid phase extraction (SPE) for analytical analysis |
US10330573B2 (en) | 2017-07-10 | 2019-06-25 | Cem Corporation | Rapid sample preparation for analytical analysis using dispersive energized extraction |
US10677696B2 (en) | 2017-07-10 | 2020-06-09 | Cem Corporation | Rapid sample preparation for analytical analysis using dispersive energized extraction |
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