CH201516A - Process for the preparation of a solid diazonium salt. - Google Patents
Process for the preparation of a solid diazonium salt.Info
- Publication number
- CH201516A CH201516A CH201516DA CH201516A CH 201516 A CH201516 A CH 201516A CH 201516D A CH201516D A CH 201516DA CH 201516 A CH201516 A CH 201516A
- Authority
- CH
- Switzerland
- Prior art keywords
- diazonium salt
- solid
- preparation
- methylsulfuric acid
- weight
- 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 mineralsauren Diazolösung von 1-Amino-2- phenoxy-5-chlorbenzol nach Zusatz von me- thylschwefelsaurem Natrium das methyl- schwefelsaure Diazoniumsalz in fester Form abscheidet.
<I>Beispiel:</I> 100 Gewichtsteile 1-Amino-2-phenoxy-5- chlorbenzol werden bei 25 bis 30 C portions- weise in 151,9 Gewichtsteile 40%ige Nitro- sylschwefelsäure eingetragen. Nach beende tem Eintragen wird so lange bei dieser Tem peratur gerührt, bis eine Probe in Wasser klar löslich ist. Die Diazotierung wird nun in 500 Gewichtsteile Wasser und 200 Gewichts teile Eis gegossen und die Diazolösung fil triert.
Das Filtrat wird dann mit 154,6 Ge wichtsteilen einer 41,5 gewichtsprozentigen Lösung von methylschwefelsaurem Natrium versetzt und die alsbald beginnende Abschei- dung durch Zusatz von 80 Gewichtsteilen Glaubersalz vervollständigt. Das methyl- schwefelsaure Diazoniumsalz wird bei niedri ger Temperatur getrocknet.
Das erhaltene Diazoniumsalz stellt ein gelblichweisses kristallines Pulver dar. Es besitzt eine gute Haltbarkeit und ist leicht löslich. Durch Vermischen mit den gebräuch lichen Färbereihilfsmitteln, wie wasserfreiem Natriumsulfat oder teilentwässertem Alu- miniumsulfat usw., kann es auf handels übliche 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 by
that one separates the methylsulfuric acid diazonium salt in solid form from a mineral acid diazo solution of 1-amino-2-phenoxy-5-chlorobenzene after addition of methylsulfuric acid.
<I> Example: </I> 100 parts by weight of 1-amino-2-phenoxy-5-chlorobenzene are introduced in portions at 25 to 30 ° C. into 151.9 parts by weight of 40% strength nitrosylsulfuric acid. After the end of the entry system, the mixture is stirred at this temperature until a sample is clearly soluble in water. The diazotization is then poured into 500 parts by weight of water and 200 parts by weight of ice and the diazo solution is fil trated.
154.6 parts by weight of a 41.5 percent by weight solution of sodium methylsulfuric acid are then added to the filtrate, and the separation which soon begins is completed by adding 80 parts by weight of Glauber's salt. The methyl sulfuric acid diazonium salt is dried at a lower temperature.
The diazonium salt obtained is a yellowish-white crystalline powder. It has a good shelf life and is easily soluble. By mixing it with the usual dyeing auxiliaries, such as anhydrous sodium sulphate or partially dehydrated aluminum sulphate, etc., it can be adjusted to the commercially available form.
Claims (1)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201516X | 1936-03-10 | ||
DE201517X | 1936-03-10 | ||
DE201514X | 1936-03-10 | ||
CH199458T | 1937-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH201516A true CH201516A (en) | 1938-11-30 |
Family
ID=27429710
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH201517D CH201517A (en) | 1936-03-10 | 1937-03-08 | Process for the preparation of a solid diazonium salt. |
CH201516D CH201516A (en) | 1936-03-10 | 1937-03-08 | Process for the preparation of a solid diazonium salt. |
CH201514D CH201514A (en) | 1936-03-10 | 1937-03-08 | Process for the preparation of a solid diazonium salt. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH201517D CH201517A (en) | 1936-03-10 | 1937-03-08 | Process for the preparation of a solid diazonium salt. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH201514D CH201514A (en) | 1936-03-10 | 1937-03-08 | Process for the preparation of a solid diazonium salt. |
Country Status (1)
Country | Link |
---|---|
CH (3) | CH201517A (en) |
-
1937
- 1937-03-08 CH CH201517D patent/CH201517A/en unknown
- 1937-03-08 CH CH201516D patent/CH201516A/en unknown
- 1937-03-08 CH CH201514D patent/CH201514A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH201517A (en) | 1938-11-30 |
CH201514A (en) | 1938-11-30 |
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