CH168014A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH168014A CH168014A CH168014DA CH168014A CH 168014 A CH168014 A CH 168014A CH 168014D A CH168014D A CH 168014DA CH 168014 A CH168014 A CH 168014A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- preparation
- dye
- water
- sodium
- Prior art date
Links
- 239000000987 azo dye Substances 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 6
- 239000000975 dye Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 239000012084 conversion product Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- ISXSFOPKZQZDAO-UHFFFAOYSA-N formaldehyde;sodium Chemical compound [Na].O=C ISXSFOPKZQZDAO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Azofarbstoffes. Es wurde gefunden, dass man zu einem wertvollen Umwandlungsprodukt eines Azo- farbstoffes dadurch gelangt, dass man den Azofarbstoff aus diazotiertem 4-Nitro-l- aminobenzol-2-sulfäthylanilid mit 2-Amino- 8-oxynaphthalin-6-sulfosäure in alkalischem Medium mit formaldehydsulfoxylschwefel- saurem Natrium behandelt.
<I>Beispiel:</I> 572 Teile des Farbstoffes, der erhalten wird nach dem D. R. P. Nr. 298 432, Bei spiel 1, durch Kupplung von diazotiertem 4 Nitro-l-aminobenzol-2-sulfäthylanilid mit 2- Amino-8-oxynaphthalin-6-sulfosäure im sau ien Medium, werden mit Wasser und etwas Alkohol angeteigt und bei gleichzeitiger Zu gabe der theoretischen Gewichtsmenge form aldehydsulfoxylschwefelsauren Natriums und 40 Gewichtsteilen Natriumhydroxyd in ein Gemisch von 700 Teilen Wasser mit 200 Tei- len Alkohol bei 50 bis 60 C im Verlauf von einer Stunde eingetragen.
Die Farbstoff lösung wird mit verdünnter Salzsäure schwach alkalisch gestellt und der Farbstoff durch Zu gabe von Kochsalz ausgesalzen. Getrocknet stellt er ein braunes Pulver dar, welches in Wasser leicht löslich ist.
Process for the preparation of an azo dye. It has been found that a valuable conversion product of an azo dye can be obtained by using the azo dye from diazotized 4-nitro-1-aminobenzene-2-sulfethylanilide with 2-amino-8-oxynaphthalene-6-sulfonic acid in an alkaline medium formaldehyde sulfoxylsulfate treated with sodium.
<I> Example: </I> 572 parts of the dye that is obtained according to DRP No. 298 432, Example 1, by coupling diazotized 4-nitro-1-aminobenzene-2-sulfethylanilide with 2-amino-8- Oxynaphthalene-6-sulfonic acid in an acidic medium are made into a paste with water and a little alcohol and, with simultaneous addition of the theoretical amount by weight of sodium formaldehyde sulfoxylsulfuric acid and 40 parts by weight of sodium hydroxide, in a mixture of 700 parts of water with 200 parts of alcohol at 50 to 60 ° C entered in the course of an hour.
The dye solution is made slightly alkaline with dilute hydrochloric acid and the dye is salted out by adding sodium chloride. When dried, it is a brown powder that is easily soluble in water.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE168014X | 1931-11-24 | ||
| CH164200T | 1932-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH168014A true CH168014A (en) | 1934-03-15 |
Family
ID=25717938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH168014D CH168014A (en) | 1931-11-24 | 1932-11-11 | Process for the preparation of an azo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH168014A (en) |
-
1932
- 1932-11-11 CH CH168014D patent/CH168014A/en unknown
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