CH176222A - Process for producing a diazo compound in solid form. - Google Patents
Process for producing a diazo compound in solid form.Info
- Publication number
- CH176222A CH176222A CH176222DA CH176222A CH 176222 A CH176222 A CH 176222A CH 176222D A CH176222D A CH 176222DA CH 176222 A CH176222 A CH 176222A
- Authority
- CH
- Switzerland
- Prior art keywords
- solid form
- sulfate
- sulfuric acid
- diazo compound
- diazonium
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung einer Diazoverbindung in fester Form. Gegenstand des vorliegenden Zusatz patentes ist ein Verfahren zur Herstellung einer Diazoverbindung in fester Form, wel ches dadurch gekennzeichnet ist, dass man 2- Chlor-1 .4-diaminobenzol durch Behandlung mit der zur Diazotierung einer Aminogruppe nötigen Menge Schwefelsäure und salpetriger Säure einseitig diazotiert und dann das Di- azoniumsulfat in fester Form abscheidet.
Das neue Diazosalz soll insbesondere für die Eisfarbenbereitung Verwendung finden. <I>Beispiel</I> r: 143 Teile 2-Chlor-1 .4-diaminobenzol werden in 145 Teilen Schwefelsäure von 78 Gewichtsprozent und 2800 Teilen Wasser bei 10 bis 15 C mit einer Lösung von 72 Tei len Natriumnitrit in 300 Teilen Wasser @di- azotiert. Aus,der filtrierten Diazolösung wird mit 200 Teilen Natriumsulfat und 310 Teilen 78%iger Schwefelsäure das Diazoniumsulfat gefällt.
Das erhaltene kristalline hellgraue Diazo- salz besitzt eine sehr gute Haltbarkeit. Es kann durch Vermischen mit den üblichen färberischen Hilfsmitteln, wie wasserfreiem Natriumsulfat oder teilentwässertem Alu miniumsulfat usw., auf handelsübliche Form eingestellt werden.
Beispiel <I>2:</I> 240,5 Teile saures Sulfat von 2-Chlor- 1 .4-diaminobenzol (erhältlich aus 1 Mol. Chlorphenylendiamin und 1 Mol. Schwefel säure) werden in 1924 Teilen Eisessig bei 15-20' C angeschlämmt. Dann werden bei 15 C und unter gutem Rühren 140 Teile Amylnitrit eingetropft. Hierbei geht das Sulfat der Base langsam in das Diazonium- sulfat über.
Nach zweistündigem Nachrühren bei 15 bis 20 -C wird abgesaugt und bei 40 C getrocknet. Aus der Mutterlauge lässt sich durch Zugabe von Äther noch eine ge ringe Menge Diazoniumsulfat abscheiden. Die Diazotierung kann auch bei Gegen wart anderer organischer Flüssigkeiten, zum Beispiel mit Benzol, ausgeführt werden.
Process for producing a diazo compound in solid form. The subject matter of the present additional patent is a process for the production of a diazo compound in solid form, which is characterized in that 2-chloro-1,4-diaminobenzene is diazotized on one side by treatment with the amount of sulfuric acid and nitrous acid necessary for diazotizing an amino group then the diazonium sulfate separates out in solid form.
The new diazo salt is to be used in particular for the preparation of ice color. <I> Example </I> r: 143 parts of 2-chloro-1,4-diaminobenzene are dissolved in 145 parts of sulfuric acid of 78 percent by weight and 2800 parts of water at 10 to 15 ° C. with a solution of 72 parts of sodium nitrite in 300 parts of water @ diacotized. The diazonium sulfate is precipitated from the filtered diazo solution with 200 parts of sodium sulfate and 310 parts of 78% strength sulfuric acid.
The crystalline light gray diazo salt obtained has a very good shelf life. It can be adjusted to the commercially available form by mixing it with the usual dyeing auxiliaries such as anhydrous sodium sulfate or partially dehydrated aluminum sulfate, etc.
Example <I> 2: </I> 240.5 parts of acid sulfate of 2-chloro-1 .4-diaminobenzene (obtainable from 1 mol. Chlorophenylenediamine and 1 mol. Sulfuric acid) are added to 1924 parts of glacial acetic acid at 15-20 ' C slurried. 140 parts of amyl nitrite are then added dropwise at 15 ° C. and with thorough stirring. Here, the sulfate of the base slowly changes into the diazonium sulfate.
After two hours of stirring at 15 to 20 ° C., the mixture is filtered off with suction and dried at 40 ° C. A small amount of diazonium sulfate can be separated from the mother liquor by adding ether. The diazotization can also be carried out in the presence of other organic liquids, for example with benzene.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE176222X | 1932-05-21 | ||
CH170764T | 1933-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH176222A true CH176222A (en) | 1935-03-31 |
Family
ID=25718977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH176222D CH176222A (en) | 1932-05-21 | 1933-05-18 | Process for producing a diazo compound in solid form. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH176222A (en) |
-
1933
- 1933-05-18 CH CH176222D patent/CH176222A/en unknown
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