CH198006A - Carbonic acid absorbents, particularly for gas protection devices, and process for their manufacture. - Google Patents
Carbonic acid absorbents, particularly for gas protection devices, and process for their manufacture.Info
- Publication number
- CH198006A CH198006A CH198006DA CH198006A CH 198006 A CH198006 A CH 198006A CH 198006D A CH198006D A CH 198006DA CH 198006 A CH198006 A CH 198006A
- Authority
- CH
- Switzerland
- Prior art keywords
- carbonic acid
- absorbent according
- dependent
- protection devices
- gas protection
- Prior art date
Links
- 230000002745 absorbent Effects 0.000 title claims description 11
- 239000002250 absorbent Substances 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 238000000034 method Methods 0.000 title description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 239000000292 calcium oxide Substances 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims 8
- 230000001419 dependent effect Effects 0.000 claims 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims 2
- 239000001569 carbon dioxide Substances 0.000 claims 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims 1
- 239000000920 calcium hydroxide Substances 0.000 claims 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims 1
- 229910000027 potassium carbonate Inorganic materials 0.000 claims 1
- 239000001103 potassium chloride Substances 0.000 claims 1
- 235000011164 potassium chloride Nutrition 0.000 claims 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims 1
- 229910052939 potassium sulfate Inorganic materials 0.000 claims 1
- 235000011151 potassium sulphates Nutrition 0.000 claims 1
- 239000003518 caustics Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
Kohlensäure-Absorptionsmittel, insbesondere für Gassehatzgeräte, und Verfahren zu seiner Herstellung. Als trockene Absorptionsmittel für Koh lensäure, insbesondere in Gasschutzgeräten, benutzt man im allgemeinen Ätzalkalien oder Natronkalk. Der übliche Natronkalk des Handels enthält ausserordentlich hohe Anteile an Atznatron. Diese Materialien werden in gekörnter Form angewendet.- Es hat sich nun herausgestellt, dass,
auch mit zu Körnern geformtem Kalziumhydrogyd mit einem Wassergehalt von 10 bis 25 % eine ausgezeichnete gohlensäureabsorption her vorzubringen ist.
Besonders zweckmässig ist dies für Gasschutzgeräte. Es hat sich gezeigt, dass das Kalziumhydrogyd Wasser nicht so heftig absorbiert, wie die Ätzalkalien; daher ist die bei der Regeneration der Ausatemluft Entstehende Wärme wesentlich geringer, weil die Kondensationswärme des Wassers und die Hydratationswärme der gebildeten Karbo nate fehlen, Grössen, die bei Ätzalkalien ver- hältnismässig stark ins Gewicht fallen.
Das Verfahren zur Herstellung des Absorptions- mittels ist dadurch gekennzeichnet, dass ge brannter Kalk mit der zwei- bis dreifachen theoretischen Wassermenge gelöscht wird, dann die entstehende Masse geknetet, geformt und bei Temperaturen zwischen 50 und 70 getrocknet wird. Das Verfahren wird bei spielsweise wie folgt ausgeführt: Gebrannter Kalk wird mit der zwei- bis dreifachen Menge des theoretisch zum Ab löschen notwendigen Wassers vorsichtig ver mischt. Es entsteht dabei eine feuchte kom pakte Masse. Diese wird gut durchgeknetet und in bekannter Weise aus Düsen heraus zu Fäden gespritzt..
Die auf diese Weise ent stehenden Stränge von etwa 3 bis 5 mm Dicke werden in etwa 2 bis 3 mm lange Stückchen zerschnitten und dann getrocknet. Gegebenenfalls können auch die Stränge erst getrocknet und dann zerkleinert werden. Die Trockentemperatur bewegt sich zwischen 50 und 70 . Es ist wesentlich, dass die Trocken- temperatlzr nicht zu hoch ist. Das fertige Produkt soll noch etwa 20% Wasser ent halten.
Es kann zweckmässig sein, dem Kalk vor dem Formen Bindemittel, zum Beispiel eine Alkaliverbindung hinzuzufügen. Man kann zum Beispiel das Ablöschen des gebrannten Kalks statt mit Wasser mit einer verdünn ten Alkalihydroxy dlösung vornehmen. Dabei darf der Alkaligehalt in dem Gesamtprodukt höchstens 2 % ausmachen. Statt der Ätz- alkalien lassen sich auch mit dem gleichen Effekt entsprechende Mengen von Karbona- ten, Sulfaten, Chloriden und andern Salzen der Alkalien verwenden.
Carbonic acid absorbent, particularly for gas hitting devices, and process for its manufacture. In general, caustic alkalis or soda lime are used as dry absorbents for carbon acid, especially in gas protection devices. The usual soda lime in the trade contains extremely high proportions of caustic soda. These materials are used in granular form.- It has now been found that,
Excellent carbonic acid absorption can also be achieved with granular calcium hydrogen with a water content of 10 to 25%.
This is particularly useful for gas protection devices. It has been shown that the calcium hydrogen does not absorb water as violently as the caustic alkalis; therefore, the heat generated during the regeneration of the exhaled air is much lower because the heat of condensation of the water and the heat of hydration of the carbonates formed are missing, quantities that are relatively important in the case of caustic alkalis.
The process for producing the absorbent is characterized in that burnt lime is extinguished with two to three times the theoretical amount of water, then the resulting mass is kneaded, shaped and dried at temperatures between 50 and 70. The process is carried out, for example, as follows: Quick lime is carefully mixed with two to three times the amount of water theoretically required to extinguish it. This creates a moist, compact mass. This is well kneaded and injected into threads from nozzles in a known manner.
The resulting strands of about 3 to 5 mm thick are cut into about 2 to 3 mm long pieces and then dried. If necessary, the strands can also be dried first and then comminuted. The drying temperature is between 50 and 70. It is essential that the dry temperature is not too high. The finished product should contain around 20% water.
It can be useful to add binding agents, for example an alkali compound, to the lime before molding. For example, the quick lime can be extinguished with a dilute alkali metal hydroxide solution instead of water. The alkali content in the overall product must not exceed 2%. Instead of the caustic alkalis, corresponding amounts of carbonates, sulfates, chlorides and other salts of the alkalis can also be used with the same effect.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE198006X | 1936-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH198006A true CH198006A (en) | 1938-05-31 |
Family
ID=5756721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH198006D CH198006A (en) | 1936-02-29 | 1937-02-23 | Carbonic acid absorbents, particularly for gas protection devices, and process for their manufacture. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH198006A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE942608C (en) * | 1941-12-05 | 1956-05-03 | Draegerwerk Ag | Acid gases, especially carbon dioxide, absorbent materials for breathing apparatus and absorption apparatus |
| DE2715635A1 (en) * | 1977-04-07 | 1978-10-12 | Draegerwerk Ag | PROCESS FOR PRODUCING A CARBON ABSORPTION AGENT, A DEVICE FOR CARRYING OUT THE PROCESS AND A CARBON ABSORPTION AGENT IN KERNEL FORM PRODUCED WITH IT |
| DE3015977A1 (en) * | 1980-04-25 | 1981-11-05 | Heinz Ing.(grad.) 4390 Gladbeck Hölter | Dry chemisorption process following fossil fuel combustion plant - gives calcium sulphate mixt. used as filler for filter ash or slag |
| DE3728423A1 (en) * | 1987-08-26 | 1989-03-09 | Hoelter Heinz | Filter for eliminating bacteria, viruses and air pollutants, preferably for occupied spaces |
| FR2640158A1 (en) * | 1988-12-14 | 1990-06-15 | Draegerwerk Ag | CO2 ABSORBING PASTE |
| DE8816866U1 (en) * | 1987-05-18 | 1991-02-28 | FTU GmbH, 82319 Starnberg | Finely powdered calcium hydroxide for gas and exhaust gas purification |
| US5352647A (en) * | 1990-05-02 | 1994-10-04 | Ftu Gmbh | Composition for separating out noxious substances from gases and exhaust gases |
-
1937
- 1937-02-23 CH CH198006D patent/CH198006A/en unknown
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE942608C (en) * | 1941-12-05 | 1956-05-03 | Draegerwerk Ag | Acid gases, especially carbon dioxide, absorbent materials for breathing apparatus and absorption apparatus |
| DE2715635A1 (en) * | 1977-04-07 | 1978-10-12 | Draegerwerk Ag | PROCESS FOR PRODUCING A CARBON ABSORPTION AGENT, A DEVICE FOR CARRYING OUT THE PROCESS AND A CARBON ABSORPTION AGENT IN KERNEL FORM PRODUCED WITH IT |
| DE3015977A1 (en) * | 1980-04-25 | 1981-11-05 | Heinz Ing.(grad.) 4390 Gladbeck Hölter | Dry chemisorption process following fossil fuel combustion plant - gives calcium sulphate mixt. used as filler for filter ash or slag |
| DE8816866U1 (en) * | 1987-05-18 | 1991-02-28 | FTU GmbH, 82319 Starnberg | Finely powdered calcium hydroxide for gas and exhaust gas purification |
| DE3728423A1 (en) * | 1987-08-26 | 1989-03-09 | Hoelter Heinz | Filter for eliminating bacteria, viruses and air pollutants, preferably for occupied spaces |
| FR2640158A1 (en) * | 1988-12-14 | 1990-06-15 | Draegerwerk Ag | CO2 ABSORBING PASTE |
| DE3842048A1 (en) * | 1988-12-14 | 1990-06-21 | Draegerwerk Ag | CO (DOWN ARROW) 2 (DOWN ARROW) ABSORBER DIMENSIONS |
| US5352647A (en) * | 1990-05-02 | 1994-10-04 | Ftu Gmbh | Composition for separating out noxious substances from gases and exhaust gases |
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