DE175583C - - Google Patents
Info
- Publication number
- DE175583C DE175583C DENDAT175583D DE175583DA DE175583C DE 175583 C DE175583 C DE 175583C DE NDAT175583 D DENDAT175583 D DE NDAT175583D DE 175583D A DE175583D A DE 175583DA DE 175583 C DE175583 C DE 175583C
- Authority
- DE
- Germany
- Prior art keywords
- alkalis
- cyanate
- spateisenstein
- excess
- iron oxide
- 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.)
- Active
Links
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 5
- NJYFRQQXXXRJHK-UHFFFAOYSA-N (4-aminophenyl) thiocyanate Chemical class NC1=CC=C(SC#N)C=C1 NJYFRQQXXXRJHK-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000000875 corresponding Effects 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000460 iron oxide Inorganic materials 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- XLJMAIOERFSOGZ-UHFFFAOYSA-N 420-05-3 Chemical compound OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M isothiocyanate Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/20—Thiocyanic acid; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Saccharide Compounds (AREA)
Description
■■■■ vijlMw^ ■■■■ vijlMw ^
PATENTSCHRIFTPATENT LETTERING
- M 175583 KLASSE 12/Λ- GRUPPE- M 175583 CLASS 12 / Λ- GROUP
Dr.WILHELM SIEPERMANN in FREIBURG i. B.Dr.WILHELM SIEPERMANN in FREIBURG i. B.
Patentiert im Deutschen Reiche vom 3. August 1905 ab.Patented in the German Empire on August 3, 1905.
Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Herstellung von cyansauren
Alkalien durch Erhitzen der Rhodanverbindungen mit Spateisenstein in Pulverform.
Wohl ist es bekannt, durch Erhitzen von Rhodanalkalien mit Eisenoxyd cyansäure Alkalien
herzustellen. Jedoch entspricht die Oxydationsstufe des Eisenoxyds nicht der Schweflungsstufe des entstehenden Scbwefeleisens.
Die Folge davon ist die Bildung von Nebenprodukten. Die nach diesem bekannten Verfahren hergestellten Lösungen sind daher
stark alkalisch.The present invention relates to a process for the production of cyanate alkalis by heating the rhodan compounds with Spateisenstein in powder form.
It is well known to produce cyanic acid alkalis by heating Rhodanalkalien with Eisenoxyd. However, the degree of oxidation of the iron oxide does not correspond to the degree of sulphurisation of the resulting sulfuric iron. The consequence of this is the formation of by-products. The solutions produced by this known process are therefore strongly alkaline.
Ein technisch verwendbares Eisenoxydul istA technically usable iron oxide is
z. Z. nicht bekannt. Das vorliegende Verfahren bietet nun · darin etwas neues, daß gefunden wurde, daß der Spateisenstein, der in großen Mengen und genügender Reinheit vorkommt, ein ausgezeichnetes Material ist, um Rhodanalkalien in cyansäure Alkalien umzusetzen.z. Not known at the moment. The present method now offers something new in that that has been found became that the Spateisenstein, which in large quantities and sufficient purity Occurs, an excellent material is to convert rhodan alkalis into cyanic acid alkalis to implement.
Während bei Anwendung von Eisenoxyd jeder Überschuß desselben weitergehende Zersetzung des gebildeten Cyanates und dadurch Verringerung der Ausbeute bedingt, ist beim Arbeiten mit Spateisenstein die Anwendung eines Überschusses geboten, da sonst die Masse stark schäumt, und bewirkt dieser Überschuß, daß die Zersetzung eine vollständige ist und das Produkt keine Spur 35Whereas, with the use of iron oxide, any excess of the same leads to further decomposition of the cyanate formed and thus a reduction in the yield, is the application when working with Spateisenstein an excess is required, otherwise the mass will foam strongly, and this will cause it Excess that the decomposition is complete and the product is not a trace 35
Rhodansalz enthält. Da aber die Reaktionstemperatur weit tiefer liegt, als bei Anwendung von Eisenoxyd, so bewirkt der überschüssige Spateisenstein keine weitere Zersetzung des gebildeten Cyanates.Contains rhodan salt. But since the reaction temperature is far lower than when it was used of iron oxide, the excess spate iron stone does not cause any further decomposition of the cyanate formed.
Man verfährt so, daß man einen Teil Rhodanalkali mit etwa zwei Teilen fein pulverisiertem Spateisenstein mischt, das Gemisch in ein mit Abzugsrohr versehenes passendes Gefäß bringt und auf 280 bis 3400 C. erhitzt. Bei 2800 beginnt schon die Entwickelung von Kohlensäure nach der FormelBy doing so, it finely powdered siderite part thiocyanate alkali mixed with about two parts, brings the mixture into a discharge pipe provided with suitable vessel and heated to 280-340 0 C.. At 280 0 the development of carbonic acid begins according to the formula
MCNS + Fe CO% = MCN0 + Fe S + CO^, ■MCNS + Fe CO % = MCN0 + Fe S + CO ^, ■
dabei bietet die Kohlensäureentwickelung eine sehr scharfe Kontrolle über das Fortschreiten der Reaktion. Pulverisiert man die so erhaltene poröse Schmelze und laugt systematisch mit kaltem Wasser aus, so erhält man direkt eine sehr reine Lösung von Cyanat, aus der das feste Salz auf bekanntem Wege gewonnen werden kann.the development of carbonic acid offers one very keen control over the progress of the reaction. The thus obtained is pulverized porous melt and systematically leaches with cold water, so one obtains directly a very pure solution of cyanate, from which the solid salt is obtained in a known way can be.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE175583C true DE175583C (en) |
Family
ID=440211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT175583D Active DE175583C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE175583C (en) |
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0
- DE DENDAT175583D patent/DE175583C/de active Active
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