AT18269B - Process for the preparation of cyanides. - Google Patents
Process for the preparation of cyanides.Info
- Publication number
- AT18269B AT18269B AT18269DA AT18269B AT 18269 B AT18269 B AT 18269B AT 18269D A AT18269D A AT 18269DA AT 18269 B AT18269 B AT 18269B
- Authority
- AT
- Austria
- Prior art keywords
- salt
- cyanides
- acid
- alkali
- preparation
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 150000002825 nitriles Chemical class 0.000 title description 4
- 238000002360 preparation method Methods 0.000 title description 3
- 239000002253 acid Substances 0.000 claims description 4
- 150000002505 iron Chemical class 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- 239000003513 alkali Substances 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 8
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 6
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229960003351 prussian blue Drugs 0.000 description 1
- 239000013225 prussian blue Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Removal Of Specific Substances (AREA)
Description
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Österreichische
EMI1.1
PATENTSCHRIFT N"18269. GROSSMANN's CYANIDE PATENTS SYNDICATE LIMITED,
FIRMA IN HARPURHEY-MANCHESTER.
Verfahren zur Darstellung von Cyaniden.
In dem Patente Nr. 17247 desselben Erfinders wurde ein Verfahren zur Herstellung von Cyaniden erläutert, welches darin besteht, dass man ein Ferrocyanid mit verdünnter Mineralsäure destilliert, die freiwerdende Cyanwasserstoffsäure in der Lösung eines Alkalihydrates oder des Hydrates einer alkalischen Erde auffängt und das in der Retorte als unlöslicher Rückstand verbleibende Forrocyaneisenalkali (Everitt-Salz) durch Kochen mit Alkalilauge bezw. Alkalicarbonatlösung unter gleichzeitiger Mitwirkung von Luft in Ferrocyanidzurückverwandelt.
Das eben beschriebene Verfahren kann jedoch auch dahin abgeändert werden, dass die Rückverwandlung des Kvoritt-Saizes in Ferro-nid in der Weise geschieht, dass man das Everitt-Salz durch Oxydation in Berlinerblau und das letztere durch Kochen mit Alkali in
EMI1.2
so dass es von neuem für die Zwecke der Oxydation benutzt werden kann. Die nachstehende Gleichung zeigt den Chemismus des Vorganges :
EMI1.3
Es entsteht also stets wiederum Ferrochlorür, das unter Mitwirkung von Luft zur Um-
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Das Verfahren zerfällt also in folgende Stadien: 1. Die Zersetzung von Ferrocyanid mit verdünnter Mineralsäure unter gleichzeitiger Abdestillierung der freiwerdenden Cyan- wasserstoffsäure ; 2.
Absorption der Cyan, wasserstoffsl1ure in Lösungen von Alkalihydrat oder Erdalkalihydrat und 3. Umwandlung des Everiltt-Salzes in Ferrocyanid : a) durch Oxydation des Everitt-Salzes in Berlinerblau mittels eines Oxydationsmittels und Luft oder eines Ferrosalzes und Luft und b) Überführung dos Berlinerblaus in Forrocyanid durch Erhitzen mit Alkali bezw. Alkalicarbonat.
Die beiden ersten Stadien sind mit dem im früheren Patente des Erfinders beschriebenen Verfahren identisch und nur das dritte Stadium weicht von diesem ab. Man erzielt jedoch gleichfalls den grossen Vorteil, dass alles im Ausgangsmaterial enthaltene Cyan in Gestalt von Cyanwasserstoffsäure bezw. Cyanid gewonnen wird.
PATENT. ANSPRÜCHE :
1. Verfahren zur Darstellung von Cyaniden aus Ferrocyaniden durch Zerlegung derselben mittels einer Säure, z. B. Schwefelsäure und Rückverwandlung des hiebei entstehenden unlöslichen Niederschlages von Ferrocyaneisensalz (Everitt-Salz) in Ferrocyanidsalz mit Oxydationsmitteln, wie Salpetersäure, Chromsäure, Eisenchlorid, Forrisulfat etc., dadurch gekennzeichnet, dass man das Erhitzen des Ferrocyaneisensalzes mit den Oxydationsmitteln unter gleichzeitiger Mitwirkung von Luft vornimmt, wonach das erhaltene Berlinerblau in bekannter Weise durch Erhitzen mit Alkalihydrat, Alkalicarbonat oder den Hydraten der alkalischen Erden in Ferrocyanidsalz übergeführt wird.
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Austrian
EMI1.1
PATENT LETTER N "18269. GROSSMANN's CYANIDE PATENTS SYNDICATE LIMITED,
COMPANY IN HARPURHEY-MANCHESTER.
Process for the preparation of cyanides.
In the patent No. 17247 of the same inventor, a process for the production of cyanides was explained, which consists in distilling a ferrocyanide with dilute mineral acid, trapping the released hydrocyanic acid in the solution of an alkali hydrate or the hydrate of an alkaline earth and that in the retort Forrocyaneisenalkali (Everitt salt) remaining as an insoluble residue by boiling with alkali BEZW. Alkali carbonate solution reconverted to ferrocyanide with the simultaneous contribution of air.
The method just described can, however, also be modified so that the conversion of the Kvoritt salt back into ferro-nide takes place in such a way that the Everitt salt is converted into Berlin blue by oxidation and the latter by boiling with alkali in
EMI1.2
so that it can be used again for the purposes of oxidation. The following equation shows the chemistry of the process:
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So there is always again ferrochloride, which with the help of air to
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The process thus breaks down into the following stages: 1. The decomposition of ferrocyanide with dilute mineral acid with simultaneous distillation of the released hydrocyanic acid; 2.
Absorption of the cyano, hydrochloric acid in solutions of alkali hydrate or alkaline earth hydrate and 3. Conversion of the Everiltt salt into ferrocyanide: a) by oxidation of the Everitt salt in Berlin blue by means of an oxidizing agent and air or a ferrous salt and air and b) conversion of the Berlin blue to forrocyanide by heating with alkali respectively. Alkali carbonate.
The first two stages are identical to the method described in the inventor's earlier patent and only the third stage differs from this. However, one also achieves the great advantage that all the cyan contained in the starting material in the form of hydrocyanic acid or. Cyanide is obtained.
PATENT. EXPECTATIONS :
1. A process for the preparation of cyanides from ferrocyanides by decomposing the same by means of an acid, e.g. B. sulfuric acid and reconversion of the resulting insoluble precipitate of ferrocyanic iron salt (Everitt salt) into ferrocyanide salt with oxidizing agents such as nitric acid, chromic acid, iron chloride, form sulfate, etc., characterized in that the ferrocyanic iron salt is heated with the oxidizing agents with the simultaneous participation of air undertakes, after which the Prussian blue obtained is converted into ferrocyanide salt in a known manner by heating with alkali hydrate, alkali carbonate or the hydrates of the alkaline earths.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT18269T | 1903-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT18269B true AT18269B (en) | 1904-11-10 |
Family
ID=3521828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT18269D AT18269B (en) | 1903-12-22 | 1903-12-22 | Process for the preparation of cyanides. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT18269B (en) |
-
1903
- 1903-12-22 AT AT18269D patent/AT18269B/en active
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