DE298780C - - Google Patents
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- Publication number
- DE298780C DE298780C DENDAT298780D DE298780DA DE298780C DE 298780 C DE298780 C DE 298780C DE NDAT298780 D DENDAT298780 D DE NDAT298780D DE 298780D A DE298780D A DE 298780DA DE 298780 C DE298780 C DE 298780C
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- DE
- Germany
- Prior art keywords
- formaldehyde
- water
- nitrate
- potassium
- mixture
- 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.)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
- A61L2/204—Formaldehyde
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- Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
In dem Hauptpatent 281553 ist ein Verfahren zur Entwicklung von Formaldehydgas oder zur Herstellung wäßriger Formaldehydlösungen aus polyjnerem Formaldehyd zwecks Raumdesinfektion geschützt worden, bei dem polymerer Formaldehyd in Mischung mit Wasser oder Wasserdampf in Gegenwart der Chloride der Alkalien, des Calciums, Strontiums, Bariums entpolymerisiert wird.In the main patent 281553 is a method for the development of formaldehyde gas or for the production of aqueous formaldehyde solutions made of polymeric formaldehyde for the purpose of room disinfection polymeric formaldehyde mixed with water or steam in the presence of Chloride of alkalis, calcium, strontium, barium is depolymerized.
Wie weitere Versuche gezeigt haben, gelingt nun die Entpolymerisierung auch durch andere neutrale Salze, wenn sie in heißem Wasser leicht löslich sind, so daß die Fähigkeit der Entpolymerisierung des festen Formaldehyds eine Funktion des Lösungsvermögens der angewandten Neutralsalze zu sein scheint. Als solche Salze kommen hauptsächlich in Betracht diejenigen der Alkalien und alkalischen Erden, soweit sie nicht unter das Hauptpatent fallen, der Erden und der Schwermetalle.As further experiments have shown, depolymerization can now also be achieved by others neutral salts, if they are easily soluble in hot water, so that the ability of Depolymerization of solid formaldehyde is a function of the solvency of the applied Seems to be neutral salts. Such salts are mainly those of the alkalis and alkaline earths, as far as they do not fall under the main patent, earths and heavy metals.
Salze, welche auf den Formaldehyd oxydierend, reduzierend oder in anderer Weise zersetzend wirken, sind ausgeschlosen.Salts which are oxidizing, reducing or otherwise on the formaldehyde have a corrosive effect are excluded.
2S ■ . Beispiel 1. 2 S ■. Example 1.
15 g Kaliumacetat und 30 g Trioxymethylen werden im offenen Gefäße mit 100 g Wasser erhitzt. Es tritt quantitative Entpolymerisierung ein.15 g of potassium acetate and 30 g of trioxymethylene are mixed with 100 g of water in an open vessel heated. Quantitative depolymerization occurs.
10 g Chlorzink und 30 g Formaldehyd mit 100 g Wasser in offenem Gefäße erhitzt, ergeben eine klare Formaldehydlösung ohne Rückstand.10 g of zinc chloride and 30 g of formaldehyde heated with 100 g of water in an open vessel result a clear formaldehyde solution with no residue.
Als weitere geeignete Neutralsalze seien folgende beispielsweise angeführt:The following are examples of other suitable neutral salts:
Kaliumbromid, Kaliumkarbonat, Kaliumiodid, Kaliumsulfat, Kaliumrhodanid, Kaliumnitrit, Kaliumnitrat, Kaliumacetat, Alkali formiat, Natriumacetat, Borax, Soda, Natriumthiosulfat, Natriumphosphat, Natriumsulfat, Natriumnitrat, Ammoniumsulfat, Ammoniumrhodanid, Ammonacetat, Ammoniumnitrat, Ammonnatriumphosphat, Calciumnitrat, CaI-ciumjodid, Bariumnitrat, Strontiumnitrat, Bariumjodid, Magnesiumsulfat, Magnesiumchlorid, ■ -bromid, Wismuthnitrat, Chlorzink, Bleiacetat, Cernitrat, Beryllnitrat, Zinntetrachlorid, Thornitrat, Kaliumnatriumtartrat.Potassium bromide, potassium carbonate, potassium iodide, potassium sulfate, potassium rhodanide, potassium nitrite, Potassium nitrate, potassium acetate, alkali formate, sodium acetate, borax, soda, sodium thiosulphate, Sodium phosphate, sodium sulfate, sodium nitrate, ammonium sulfate, ammonium rhodanide, Ammonium acetate, ammonium nitrate, ammonium sodium phosphate, calcium nitrate, calcium iodide, Barium nitrate, strontium nitrate, barium iodide, magnesium sulfate, magnesium chloride, ■ -bromide, bismuth nitrate, zinc chloride, lead acetate, cerium nitrate, beryl nitrate, tin tetrachloride, thorn nitrate, Potassium sodium tartrate.
Es ist bereits vorgeschlagen worden, Trioxymethylen (Paraformaldehyd) mit Wasser und einem neutralen Salze unter einem Drucke von 5 bis 6 Atm. bei einer Temperatur von 130 bis 135 ° C zu zersetzen. Nach den AngabenIt has already been suggested to use trioxymethylene (paraformaldehyde) with water and a neutral salt under a pressure of 5 to 6 atm. at a temperature of 130 to 135 ° C to decompose. According to the information
der deutschen /Patentschrift 181509 übt bei diesem .Verfahren das zugesetzte neutrale Salz jedoch / irgendwelche besonderen Wirkungen nicht ,,aus*. /the German / Patent 181509 exercises However, the neutral salt added to this process / any special effects not from*. /
Diesem .Stande der Technik gegenüber war es in der/Tat überraschend, daß es nach vorstehendejn Verfahren gelingt, durch den Zusatz der oben näher gekennzeichneten Salze eine so starke Wirkung auf den Paraformaldehyd auszuüben, daß er bereits bei Wasserbadtemperatur, also etwa bei 100 °, und in offenen Gefäßen praktisch quantitativ in wirksames Formaldehydgas übergeführt werden kann. Dieser Effekt wurde, wie beispielsweise aus der deutschen Patentschrift 233651 hervorgeht, durch die bisher bekannten, ohne Überdruck arbeitenden, sog. »apparatlosen» Verfahren auch nicht annähernd erreicht, obwohl diese Verfahren sich kostspieliger Zusätze von oxydierend wirkenden Salzen, Metallpulver u. dgl. bedienen.In relation to this state of the art it was indeed surprising that according to the above The process succeeds by adding the salts identified in more detail above exert such a strong effect on the paraformaldehyde that it is already at water bath temperature, thus around 100 °, and in open vessels practically quantitatively in effective Formaldehyde gas can be transferred. This effect was, as can be seen, for example, from the German patent specification 233651, by the so-called "apparatus-less" processes known up to now, which work without excess pressure, not even remotely achieved, although these processes are expensive additions of oxidizing salts, metal powder and the like.
Wesentlich ist bei dem neuen Verfahren, daß sich die Entpolymerisierung und praktisch quantitative Vergasung bei der angewandten Temperatur so schnell ermöglichen läßt, wie es für die Raumdesinfektion erforderlich ist.It is essential in the new process that the depolymerization and practical allows quantitative gasification at the applied temperature as quickly as possible it is necessary for room disinfection.
Claims (2)
Applications Claiming Priority (1)
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DE298780T |
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DE298780C true DE298780C (en) |
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ID=32875912
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DENDAT281553D Active DE281553C (en) | |||
DENDAT298780D Active DE298780C (en) |
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DENDAT281553D Active DE281553C (en) |
Country Status (1)
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DE (2) | DE298780C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2129946A1 (en) * | 1971-03-23 | 1972-11-03 | Gonin Lab | Disinfecting process - utilising formaldehyde vapour for use in cante |
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- DE DENDAT281553D patent/DE281553C/de active Active
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