DE545875C - Pest repellants - Google Patents

Pest repellants

Info

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
Application number
DED60917D
Other languages
German (de)
Inventor
Dr Adolf Berthmann
Dr H Kuekenthal
Dr Ph Naoum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DYNAMIT AG
Original Assignee
DYNAMIT AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DYNAMIT AG filed Critical DYNAMIT AG
Priority to DED60917D priority Critical patent/DE545875C/en
Application granted granted Critical
Publication of DE545875C publication Critical patent/DE545875C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06DMEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
    • C06D7/00Compositions 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 Kalisalpeter ........ 3004, Dicyandiamid ....... 25 0/0) Holzkohle .......... io 0/0, Trinitrotoluol ....... 2704, Dinitrotoluol ....... 3 0/0. Bauxit ............ 5 0%. ioo g dieses Räuchersatzes entwickeln 401 Gas, die 4. g Blausäure enthalten. Der Gehalt dieses Gases an Blausäuregas beträgt somit 8,3 Volumprozent.Example i Potash nitrate ........ 3004, Dicyandiamide ....... 25 0/0) Charcoal .......... io 0/0, Trinitrotoluene ....... 2704, Dinitrotoluene ....... 3 0/0. Bauxite ............ 5 0%. 100 g of this incense substitute generate 40 liters of gas that contain 4. g of hydrocyanic acid. The hydrogen cyanide gas content of this gas is thus 8.3 percent by volume.

Beispiel 2 ' Kaliumchlorat ...... 2o0/,>, Dicyandiamid ....... 25 0@ o. Holzkohle .......... 5%, Trinitrotoluol ....... 35 0'0, Dinitrotoluol ....... o 3 Paraffin ........... 20/", Bauxit ............ io 04. ioo g dieses Räuchersatzes entwickeln 31 1 Gas, die 4,2 g Blausäure enthalten. Der Gehalt dieses Gases an Blausäuregas beträgt somit 11,2 Volumprozent. Beispiel Kaliumchlorat ..... 35 %, Hexamethylentetramin 2o0/", Holzkohle .......... 15 %, Paraffinöl .......... io 0@o, Calciumcarbid ...... 2o 0@o. ioo g dieses Räuchersatzes entwickeln 301 Gas mit z,38 g Blausäure. Der Gehalt dieses Gases an Blausäuregas beträgt somit 6,6 Volumprozent.Example 2 ' Potassium chlorate ...... 2o0 /,>, Dicyandiamide ....... 25 0 @ O. Charcoal .......... 5%, Trinitrotoluene ....... 35 0'0, Dinitrotoluene ....... o 3 Paraffin ........... 20 / ", Bauxite ............ io 04. 100 g of this incense substitute develop 31 liters of gas containing 4.2 g of hydrocyanic acid. The hydrogen cyanide gas content of this gas is therefore 11.2 percent by volume. example Potassium chlorate ..... 35%, Hexamethylenetetramine 2o0 / ", Charcoal .......... 15%, Paraffin oil .......... io 0 @ o, Calcium carbide ...... 2o 0 @ o. 100 g of this incense substitute develop 301 gas with about 38 g of hydrogen cyanide. The hydrogen cyanide gas content of this gas is thus 6.6 percent by volume.

Claims (2)

PATENTANSPRÜCHE; r. Schädlingsbekämpfungsmittel, dadurch gekennzeichnet, daß man an-sich bekannten Brandsätzen mit Sauerstoffmangel' zum Zwecke der Blausäureent-. Wicklung beim Abbrennen solche stickstoffhaltigen Verbindungen zusetzt, die den Stickstoff entweder bereits als Cyanrest oder als Amido-, Imido- oder Nitrogruppen enthalten. PATENT CLAIMS; r. Pesticides, characterized in that known incendiary agents with a lack of oxygen are used for the purpose of hydrogen cyanide. Winding adds nitrogen-containing compounds which already contain nitrogen as a cyano radical or as amido, imido or nitro groups when burning off. 2. Schädlingsbekämpfungsmittel nach Anspruch i, dadurch gekennzeichnet, daß man außer den genannten Stoffen solche zusetzt, die die Blausäurebildung katalytisch begünstigen.2. Pesticide according to claim i, characterized in that that in addition to the substances mentioned, those are added which catalyze the formation of hydrocyanic acid favor.
DED60917D 1931-04-16 1931-04-16 Pest repellants Expired DE545875C (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE899734C (en) * 1945-06-04 1953-12-14 Ici Ltd Smoke-producing pest repellent

Cited By (1)

* Cited by examiner, † Cited by third party
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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