GB499992A - Improvements in the manufacture of decolorizing and filtering agents - Google Patents
Improvements in the manufacture of decolorizing and filtering agentsInfo
- Publication number
- GB499992A GB499992A GB2927937A GB2927937A GB499992A GB 499992 A GB499992 A GB 499992A GB 2927937 A GB2927937 A GB 2927937A GB 2927937 A GB2927937 A GB 2927937A GB 499992 A GB499992 A GB 499992A
- Authority
- GB
- United Kingdom
- Prior art keywords
- decolourizing
- kieselguhr
- woody
- wood
- vary
- 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
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
Abstract
A decolourizing and filtering agent is obtained by reducing kieselguhr and woody materials separately to powders which are then mixed and carbonized, for example at 600 DEG C., and then activated by means of steam or combustion gases, with or without added air, at a high temperature, e.g. 900 DEG C., and this temperature is preferably not allowed to drop below the carbonization temperature. The woody materials include plant stalks, piths, husks, barks, corks, and woody seeds as fruit seeds, and tree wood, such as sawdust, particularly from coniferous trees. The reduction of the woody material to powder is facilitated by first heating the wood until water is driven off and it darkens and becomes fragile. The proportions used may vary in accordance with the filtering value and decolourizing power required and may vary from equal parts to 12 parts of raw wood and 1 part of kieselguhr. Examples are given comparing the filtering value and decolourizing power of the product with those of kieselguhr, decolourizing carbon and a mixture of kieselguhr and decolourizing carbon, in respect of sugar solutions.ALSO:A decolourizing and filtering agent is obtained by reducing kieselguhr and woody materials separately to powders which are then mixed and carbonized, for example at 600 DEG C., and then activated by means of steam or combustion gases, with or without added air at a high temperature, e.g. 900 DEG C., and this temperature is preferably not allowed to drop below the carbonization temperature. The woody materials include plant stalks, piths, husks, barks, corks and woody seeds as fruit seeds and tree wood, such as sawdust particularly from coniferous trees. The reduction of the woody material to powder is facilitated by first heating the wood until water is driven off and it darkens and becomes fragile. The proportions used may vary in accordance with the filtering value and decolourizing power required and may vary from equal parts to 12 parts of raw wood and 1 part of kieselguhr. Examples are given comparing the filtering value and decolourizing power of the product with those of kieselguhr, decolourizing carbon and a mixture of kieselguhr and decolourizing carbon in respect of sugar solutions.ALSO:A decolourizing and filtering agent is obtained by reducing kieselguhr and woody materials separately to powders which are then mixed and carbonized, for example at 600 DEG C., and then activated by means of steam or combustion gases, with or without added air at a high temperature, e.g. 900 DEG C., and this temperature is preferably not allowed to drop below the carbonization temperature. The woody materials include plant stalks, piths, husks, barks, corks and woody seeds, as fruit seeds, and tree wood, such as sawdust, particularly from coniferous trees. The reduction of the woody material to powder is facilitated by first heating the wood until water is driven off and it darkens and becomes fragile. The proportions used may vary in accordance with the filtering value and decolourizing power required and may vary from equal parts to 12 parts of raw wood and 1 part of kieselguhr. Examples are given comparing the filtering value and decolourizing power of the product with those of kieselguhr, decolourizing carbon and a mixture of kieselguhr and decolourizing carbon in respect of sugar solutions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2927937A GB499992A (en) | 1937-10-26 | 1937-10-26 | Improvements in the manufacture of decolorizing and filtering agents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2927937A GB499992A (en) | 1937-10-26 | 1937-10-26 | Improvements in the manufacture of decolorizing and filtering agents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB499992A true GB499992A (en) | 1939-02-01 |
Family
ID=10289015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2927937A Expired GB499992A (en) | 1937-10-26 | 1937-10-26 | Improvements in the manufacture of decolorizing and filtering agents |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB499992A (en) |
-
1937
- 1937-10-26 GB GB2927937A patent/GB499992A/en not_active Expired
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