CH201515A - Process for the preparation of a solid diazonium salt. - Google Patents
Process for the preparation of a solid diazonium salt.Info
- Publication number
- CH201515A CH201515A CH201515DA CH201515A CH 201515 A CH201515 A CH 201515A CH 201515D A CH201515D A CH 201515DA CH 201515 A CH201515 A CH 201515A
- Authority
- CH
- Switzerland
- Prior art keywords
- diazonium salt
- solid
- preparation
- ethylsulfuric acid
- deposited
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines festen Diazoniumsalzes. Gegenstand des vorliegenden Zusatz patentes ist ein Verfahren zur Herstellung eines festen Diazoniumsalzes, welches da durch gekennzeichnet ist, dass man aus einer äthylschwefelsauren Diazolösung von 1 Amino-2-(4'-chlor-phenogy)-5-chlorbenzol das äthylsehwefelsaure Diazoniumsalz in fester Form abscheidet.
<I>Beispiel:</I> 100 Gewichtsteile 1-Amino-2-(4'-chlor- phenogy)-5-chlorbenzol werden fein gemah len und bei zirka 20 C in 450 Gewichtsteile Äthylschwefelsäure von 33,6 % Reingehalt eingetragen. Nach einstündigem Nachrühren werden 72 Gewichtsteile 40gewichtsprozen- tige Natriumnitritlösung bei 15 bis 20 C schnell unter die Oberfläche einfliessen ge lassen.
Nach erfolgter Diazotierung wird mit 1000 Gewichtsteilen Wasser verdünnt und filtriert. In diese Diazolösung werden 450 Ge wichtsteile Ammoniumsulfat eingetragen und dabei auf 0 bis 5 C abgekühlt. Das äthyl- schwefelsaure Diazoniumsalz scheidet sich ab, es wird filtriert und bei niedriger Tem- peratur getrocknet.
Das erhaltene Diazoniumsalz stellt eile kristallines Pulver dar. Es besitzt eine gute Haltbarkeit und ist leicht löslich. Durch Ver mischen mit den gebräuchlichen Färberei hilfsmitteln, wie wasserfreiem Natriumsulfat oder teilentwässertem Aluminiumsulfat usw., kann es auf handelsübliche Form eingestellt werden.
Process for the preparation of a solid diazonium salt. The subject of the present additional patent is a process for the production of a solid diazonium salt, which is characterized in that from an ethylsulfuric acid diazo solution of 1 amino-2- (4'-chlorophenogy) -5-chlorobenzene the ethylsulfuric acid diazonium salt in solid form separates.
<I> Example: </I> 100 parts by weight of 1-amino-2- (4'-chlorophenogy) -5-chlorobenzene are finely ground and added to 450 parts by weight of 33.6% pure ethylsulfuric acid at around 20 C. After stirring for one hour, 72 parts by weight of 40% by weight sodium nitrite solution are allowed to flow rapidly under the surface at 15 to 20 ° C.
After the diazotization has taken place, it is diluted with 1000 parts by weight of water and filtered. 450 parts by weight of ammonium sulfate are added to this diazo solution and the mixture is cooled to 0 to 5 ° C. The ethylsulfuric acid diazonium salt separates out, it is filtered and dried at low temperature.
The diazonium salt obtained is a crystalline powder. It has a good shelf life and is easily soluble. By mixing it with the usual dyeing auxiliaries, such as anhydrous sodium sulfate or partially dehydrated aluminum sulfate, etc., it can be adjusted to the commercially available form.
Claims (1)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201516X | 1936-03-10 | ||
DE201517X | 1936-03-10 | ||
DE201515X | 1936-03-10 | ||
DE201514X | 1936-03-10 | ||
CH199458T | 1937-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH201515A true CH201515A (en) | 1938-11-30 |
Family
ID=27509566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH201515D CH201515A (en) | 1936-03-10 | 1937-03-08 | Process for the preparation of a solid diazonium salt. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH201515A (en) |
-
1937
- 1937-03-08 CH CH201515D patent/CH201515A/en unknown
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