DE545875C - Pest repellants - Google Patents
Pest repellantsInfo
- Publication number
- DE545875C DE545875C DED60917D DED0060917D DE545875C DE 545875 C DE545875 C DE 545875C DE D60917 D DED60917 D DE D60917D DE D0060917 D DED0060917 D DE D0060917D DE 545875 C DE545875 C DE 545875C
- Authority
- DE
- Germany
- Prior art keywords
- hydrocyanic acid
- hydrogen cyanide
- gas
- nitrogen
- burning
- 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
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D7/00—Compositions for gas-attacks
Description
Schädlingsbekämpfungsmittel Es ist bekannt, Schädlinge durch Ausräuchern ihrer Baue mit Hilfe von Brandsätzen zu bekämpfen und nach Möglichkeit zu vernichten. Man verwendet dabei mit Vorliebe solche Brandsätze, die beim Abbrennen giftig wirkende Gase entwickeln, wie Kohlenoxyd, schweflige Säure und andere Schwefelverbindungen.Pesticides It is known to remove pests by fumigating to fight their burrows with the help of incendiary devices and, if possible, to destroy them. It is preferred to use incendiary devices that are poisonous when burned down Gases evolve, such as carbon monoxide, sulphurous acid and other sulfur compounds.
Als ganz besonders wirksam haben sich nun Blausäuredämpfe in Verbinäung mit den üblichen Verbrennungsprodukten, die beim Abbrennen derartiger Brandsätze entstehen, ergeben.Hydrocyanic acid vapors in connection have now proven to be particularly effective with the usual products of combustion that result from burning such incendiary agents arise, surrender.
Damit beim Abbrennen der Brandsätze Blausäure entsteht, ist es notwendig, stickstoffreiche Verbindungen zuzusetzen, wobei solche Verbindungen, die den Cyanrest bereits enthalten, sich als besonders vorteilhaft erweisen, aber nicht Bedingung sind. Die Entstehung von Blausäure beim Abbrennen solcher Sätze war nicht ohne weiteres vorauszusehen, da ihre reichliche Bildung z. B. aus Kohlenoxyd und Ammoniak von der Einhaltung eines optimalen Temperaturbereichs von 70o° bis goo° abhängt. Es mull weiterhin eine schnelle Abkühlung der Verbrennungsgase stattfinden, damit die Blausäure als endotherme Verbindung nicht wieder zerfällt oder durch das gleichzeitig gebildete Wasser verseift wird. Diese Bedingungen sind offenbar bei den weiter unten angegebenen Brandsätzen, die einen starken Sauerstoffmangel und eine niedrige Verbrennungstemperatur aufweisen, erfüllt.In order to produce hydrogen cyanide when the incendiary burns, it is necessary to add nitrogen-rich compounds, with compounds containing the cyano radical already included, prove to be particularly beneficial, but not a requirement are. The formation of hydrogen cyanide when burning such sentences was not straightforward to be foreseen, since their abundant education z. B. from carbon monoxide and ammonia of the maintenance of an optimal temperature range from 70o ° to goo ° depends. It mull, the combustion gases continue to cool down rapidly so that the Hydrocyanic acid as an endothermic compound does not disintegrate again or through that at the same time formed water is saponified. These conditions are apparently among those below indicated incendiary devices that have a severe lack of oxygen and a low combustion temperature have fulfilled.
Als stickstoffreiche Zusätze kommen vor allem folgende.Stoffe in Betracht: Kalkstickstoff, Dicyandiamid, Harnstoff, Guanidin, Hexamethylentetramin, Nitroharnstoff, Nitroguanidin und ähnliche Verbindungen dieser und verwandter Körperklassen.The following substances are particularly suitable as nitrogen-rich additives: Calcium cyanamide, dicyandiamide, urea, guanidine, hexamethylenetetramine, nitrourea, Nitroguanidine and similar compounds of this and related body classes.
Die Blausäureentwicklung wird unterstützt durch die Anwesenheit aromatischer Nitroverbindungen, wie Pikrinsäure, Nitroverbindungen des Benzols, Toluols und Naphthalins, die beim Abbrennen neben reichlicher Kohlenaxydentwicklung auch ihrerseits Blausäuredämpfe liefern.The development of hydrocyanic acid is supported by the presence of aromatic Nitro compounds such as picric acid, nitro compounds of benzene, toluene and naphthalene, which, in addition to the abundant evolution of carbon dioxide, also produce hydrocyanic acid vapors when they are burned off deliver.
Ferner wird die Blausäurebildung begünstigt durch die Anwesenheit katalytisch wirkender Stoffe, in diesem Falle besonders durch die Beimischung von Tonerde, Kieselsäure, z. B. Quarzpulver, Kieselsäuregel oder anderer kieselsäurehaltiger Substanzen.Furthermore, the formation of hydrocyanic acid is favored by its presence catalytically active substances, in this case especially through the admixture of Alumina, silica, e.g. B. quartz powder, silica gel or other silica containing Substances.
Die Grundzusammensetzung der an sich bekannten Brandsätze besteht aus Kohlenstoffträgern, z. B. Holzkohle oder Holzmehl, und Sauerstoffträgern; -zl. B. Nitraten, Chloraten öder Perchloraten.The basic composition of the incendiary devices known per se consists from carbon carriers, e.g. B. charcoal or wood flour, and oxygen carriers; -zl. B. nitrates, chlorates or perchlorates.
Beispiel i
Beispiel 2 '
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED60917D DE545875C (en) | 1931-04-16 | 1931-04-16 | Pest repellants |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED60917D DE545875C (en) | 1931-04-16 | 1931-04-16 | Pest repellants |
Publications (1)
Publication Number | Publication Date |
---|---|
DE545875C true DE545875C (en) | 1932-03-07 |
Family
ID=7058061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED60917D Expired DE545875C (en) | 1931-04-16 | 1931-04-16 | Pest repellants |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE545875C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE899734C (en) * | 1945-06-04 | 1953-12-14 | Ici Ltd | Smoke-producing pest repellent |
-
1931
- 1931-04-16 DE DED60917D patent/DE545875C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE899734C (en) * | 1945-06-04 | 1953-12-14 | Ici Ltd | Smoke-producing pest repellent |
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