GB440943A - Improvements in or relating to filtering masses for gas masks for affording protection against hydrocyanic acid - Google Patents
Improvements in or relating to filtering masses for gas masks for affording protection against hydrocyanic acidInfo
- Publication number
- GB440943A GB440943A GB24505/35A GB2450535A GB440943A GB 440943 A GB440943 A GB 440943A GB 24505/35 A GB24505/35 A GB 24505/35A GB 2450535 A GB2450535 A GB 2450535A GB 440943 A GB440943 A GB 440943A
- Authority
- GB
- United Kingdom
- Prior art keywords
- salt
- precipitated
- basic
- manganese
- protection against
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B21/00—Devices for producing oxygen from chemical substances for respiratory apparatus
Landscapes
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
A gas-mask filter for protection against hydrocyanic acid comprises an inorganic basic salt and an oxide of a heavy metal, e.g. iron, chromium, nickel or manganese. Diluents such as talc, textile fibres, silica gel, and active carbon may be incorporated. A suitable filter has the composition by weight: basic copper carbonate 60, manganese dioxide 90, and diluent 75 parts. The components may be ground together, preferably while wet, dried at a temperature, e.g. 100-120 DEG C., such that no decomposition occurs, and moulded. Alternatively, the metal oxide and basic salt may be precipitated and mixed in one operation. Manganese dioxide may be precipitated from a solution of a manganese salt, the precipitate washed, and suspended in a liquid containing a metallic salt from which a basic salt is precipitated. A mixture of one or more oxides and one or more basic salts of the same metal may be used. The porosity of the product is determined by the liquid medium employed and the moulding pressure. The filter may be employed in alternate layers with other filtering materials.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT440943X | 1934-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB440943A true GB440943A (en) | 1936-01-08 |
Family
ID=11255886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24505/35A Expired GB440943A (en) | 1934-09-18 | 1935-09-02 | Improvements in or relating to filtering masses for gas masks for affording protection against hydrocyanic acid |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB440943A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE976796C (en) * | 1954-03-27 | 1964-04-30 | Auergesellschaft Gmbh | Process for the production of activated carbon compounds containing copper and chromium which absorb hydrogen cyanide and cyanogen chloride |
US4065406A (en) * | 1975-01-29 | 1977-12-27 | Matsushita Electric Industrial Co., Ltd. | Catalyst for use in treating gas |
US20110048107A1 (en) * | 2009-09-03 | 2011-03-03 | Dräger Safety AG & Co. KGaA | Device for gas analysis |
-
1935
- 1935-09-02 GB GB24505/35A patent/GB440943A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE976796C (en) * | 1954-03-27 | 1964-04-30 | Auergesellschaft Gmbh | Process for the production of activated carbon compounds containing copper and chromium which absorb hydrogen cyanide and cyanogen chloride |
US4065406A (en) * | 1975-01-29 | 1977-12-27 | Matsushita Electric Industrial Co., Ltd. | Catalyst for use in treating gas |
US20110048107A1 (en) * | 2009-09-03 | 2011-03-03 | Dräger Safety AG & Co. KGaA | Device for gas analysis |
US8646341B2 (en) * | 2009-09-03 | 2014-02-11 | Dräger Safety AG & Co. KGaA | Filtration system for gas analysis |
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