AT22661B - Process for the preparation of yellow disazo dyes for wool. - Google Patents
Process for the preparation of yellow disazo dyes for wool.Info
- Publication number
- AT22661B AT22661B AT22661DA AT22661B AT 22661 B AT22661 B AT 22661B AT 22661D A AT22661D A AT 22661DA AT 22661 B AT22661 B AT 22661B
- Authority
- AT
- Austria
- Prior art keywords
- wool
- preparation
- disazo dyes
- yellow
- yellow disazo
- Prior art date
Links
- 239000000975 dye Substances 0.000 title claims description 9
- 210000002268 wool Anatomy 0.000 title claims description 7
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 title claims description 3
- 238000000034 method Methods 0.000 title claims description 3
- 238000002360 preparation method Methods 0.000 title claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- QELUYTUMUWHWMC-UHFFFAOYSA-N edaravone Chemical compound O=C1CC(C)=NN1C1=CC=CC=C1 QELUYTUMUWHWMC-UHFFFAOYSA-N 0.000 claims description 3
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- JCUYNPHEESTECG-UHFFFAOYSA-N 3-amino-6-(4-aminophenyl)benzene-1,2-disulfonic acid Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C(S(O)(=O)=O)=C1S(O)(=O)=O JCUYNPHEESTECG-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009967 direct dyeing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
Landscapes
- Coloring (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Darstellung gelber Disazofarbstoffe für Wolle.
Es wurde gefunden, dass man durch Kuppeln der Tetrazoverbindungen der Benzidinbezw. Tolidindisulfosäuren der Formeln :
EMI1.1
mit zwei Molekülen 1-Phenyl-3-methyl-5-pyrazolon zu gelben Wollfarbstoffen gelangt, die sich den bekannten analog zusammengesetzten Farbstoffen der deutschen Patentschriften Nr. 108634 und 138902 gegenüber durch die technisch äusserst wichtige Eigenschaft auszeichnen, dass sie bereits in direkter Färbung gegen weisse Wolle und gegen weisse Baumwolle walkecht sind.
Beispiel. 34-4 Teile Benzidindisulfosäure werden in der bekannten Weise mit Salzsäure und 13-8 Teilen Natriumnitrit diazotiert. Die so erhaltene Tetrazoverbindung wird darauf unter Kühlung mit einer Lösung von 38 Teilen 1-Phenyl-3-methyl-5-pyrazolon in verdünnter Salzsäure versetzt und zu der so erhaltenen Mischung ein Überschuss von Natriumacetat zugesetzt. Nachdem die Kupplung beendet ist, wird durch Zusatz von Soda alkalisch gemacht und der Farbstoff in der üblichen Weise isoliert. Derselbe färbt Wolle gelb.
Der analoge Farbstoff aus der Tolidindisulfosiiure färbt ebenfalls Wolle gelb.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the preparation of yellow disazo dyes for wool.
It has been found that by coupling the tetrazo compounds of Benzidinbezw. Tolidinedisulfonic acids of the formulas:
EMI1.1
with two molecules of 1-phenyl-3-methyl-5-pyrazolone leads to yellow wool dyes, which are distinguished by the technically extremely important property that they are already in direct dyeing compared to the known analogous dyes of German patents Nos. 108634 and 138902 white wool and are stable against white cotton.
Example. 34-4 parts of benzidine disulphonic acid are diazotized in the known manner with hydrochloric acid and 13-8 parts of sodium nitrite. The tetrazo compound thus obtained is then admixed with a solution of 38 parts of 1-phenyl-3-methyl-5-pyrazolone in dilute hydrochloric acid, while cooling, and an excess of sodium acetate is added to the mixture thus obtained. After the coupling has ended, it is made alkaline by adding soda and the dye is isolated in the usual manner. The same dyes wool yellow.
The analogous dye from tolidinedisulfonic acid also dyes wool yellow.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1904160675D DE160675C (en) | 1904-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT22661B true AT22661B (en) | 1906-01-10 |
Family
ID=5681355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT22661D AT22661B (en) | 1904-05-09 | 1905-04-20 | Process for the preparation of yellow disazo dyes for wool. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT22661B (en) |
-
1905
- 1905-04-20 AT AT22661D patent/AT22661B/en active
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