GB938621A - Improvements in or relating to filter aids - Google Patents
Improvements in or relating to filter aidsInfo
- Publication number
- GB938621A GB938621A GB28431/61A GB2843161A GB938621A GB 938621 A GB938621 A GB 938621A GB 28431/61 A GB28431/61 A GB 28431/61A GB 2843161 A GB2843161 A GB 2843161A GB 938621 A GB938621 A GB 938621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aid
- aragonite
- microns
- calcium carbonate
- filter
- 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
- B01D37/00—Processes of filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Sodium aluminate liquor containing suspended red mud is filtered through a canvas cloth in a filter press, with addition of a filter aid consisting of or containing natural or synthetic aragonite (orthorhombic calcium carbonate) and in the proportion of 0,1 to 10 gms. of aid per litre of liquor. The aid may alternatively be applied to the cloth before filtration. A specific filter aid composition comprises in admixture aragonite and calcite (hexagonal calcium carbonate), the aragonite being present as particles from 1 to 5 microns in width and from 5 to 40 microns in length.ALSO:Sodium aluminate liquor containing suspended red mud is filtered through a canvas cloth in a filter press, with addition of a filter acid consisting of or containing natural or synthetic aragonite (orthorhombic calcium carbonate) and in the proportion of 0,1 to 10 gms. of aid per litre of liquor. Other process liquors may have up to 20 gms. of aid per litre. The aid may alternatively be applied to the cloth before filtration. A specific filter aid composition comprises in admixture aragonite and calcite (hexagonal calcium carbonate), the aragonite being present as particles from 1 to 5 microns in width and from 5 to 40 microns in length.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB28431/61A GB938621A (en) | 1961-08-04 | 1961-08-04 | Improvements in or relating to filter aids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB28431/61A GB938621A (en) | 1961-08-04 | 1961-08-04 | Improvements in or relating to filter aids |
Publications (1)
Publication Number | Publication Date |
---|---|
GB938621A true GB938621A (en) | 1963-10-02 |
Family
ID=10275524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28431/61A Expired GB938621A (en) | 1961-08-04 | 1961-08-04 | Improvements in or relating to filter aids |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB938621A (en) |
-
1961
- 1961-08-04 GB GB28431/61A patent/GB938621A/en not_active Expired
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