CH122751A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH122751A CH122751A CH122751DA CH122751A CH 122751 A CH122751 A CH 122751A CH 122751D A CH122751D A CH 122751DA CH 122751 A CH122751 A CH 122751A
- Authority
- CH
- Switzerland
- Prior art keywords
- disazo dye
- preparation
- dye
- mol
- nitro
- Prior art date
Links
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 4
- 238000002360 preparation method Methods 0.000 title claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- DMLAVOWQYNRWNQ-UHFFFAOYSA-N azobenzene Chemical compound C1=CC=CC=C1N=NC1=CC=CC=C1 DMLAVOWQYNRWNQ-UHFFFAOYSA-N 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- 238000004040 coloring Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ARALQFYZUBVTRF-UHFFFAOYSA-N 5-diazo-6-methoxy-2-nitrocyclohexa-1,3-diene Chemical compound [N+](=O)([O-])C=1C=CC(C(C1)OC)=[N+]=[N-] ARALQFYZUBVTRF-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Disazofarbstoffes. Durch den Patentanspruch des Haupt patentes wird ein Verfahren zur Darstellung eines Disazofarbstoffes unter Schutz gestellt, welches dadurch gekennzeichnet ist, dass man <B>1</B> Mol. 2. 4-Diiaitrochlorbenzol auf<B>1</B> Mol. des Disazofarbstoffes:
EMI0001.0008
erhältlich oxynaphtalin-3.6-disulfosä,ure durch Kuppeln von mit 1-Amino-8- 4-Nitro- diazobenzol in Gegenwart von Säure und,-iiit Diazobenzol in Gegen-wart von Alkall und Reduktion der Nitrogruppe, einwirken lässt,.
Man erhält einen ganz ähnlichen Farbstof <B>f,</B> wenn man auf<B>1</B> Mol. des Disazofarbstoffes:
EMI0001.0026
erhältlich durch Kuppeln von 1-Amino-8- oxynaplitalin-4. 6-,disulfosäure mit 5-Nitro- 2-diazo-l-methoxybenzol in Gegenwart von Säure und mit Diazobenzol in Gegenwart von Alkali und Reduktion<B>-</B> der Nitrogruppe, <B>1</B> Mol. 2.
4-Dinitrochlorbeuzol ein-wirken lässt. Der erhaltene Farbstoff hat die gleichen färberisclien Eigenschaften wie derjenige des Hauptpatentes. <I>Beispiel:</I> <B>61,6</B> Teile des der vorstehenden Formel entsprechenden Disazofarbstoffes werden in <B>1000</B> Teilen Wasser gelöst, mit 20 Teilen <B>2.</B> 4-Dinitro-l-chlorbenzol und 20 Teilen kristallisiertem Natriumaeetat <B>10</B> Stunden unter Rüekfluss gekocht.
Das ausgeschiedene ReaktionsproJukt wird nach dem Erhalten abfiltriert, zweckmässig mit etwas ganz ver dünntem Salzwasser gewaschen und getrock net.
Process for the preparation of a disazo dye. The claim of the main patent puts a process for the preparation of a disazo dye under protection, which is characterized in that <B> 1 </B> mol. 2. 4-diitrochlorobenzene to <B> 1 </B> mol. of the disazo dye:
EMI0001.0008
obtainable oxynaphtalin-3,6-disulfosä, ure by coupling with 1-amino-8-4-nitro-diazobenzene in the presence of acid and, -iiit diazobenzene in the presence of alkali and reduction of the nitro group.
A very similar dye <B> f </B> is obtained if one uses <B> 1 </B> mol. Of the disazo dye:
EMI0001.0026
obtainable by coupling 1-amino-8-oxynaplitalin-4. 6-, disulfonic acid with 5-nitro-2-diazo-1-methoxybenzene in the presence of acid and with diazobenzene in the presence of alkali and reduction of the nitro group, 1 mol. 2.
4-Dinitrochlorbeuzol can act. The dye obtained has the same coloring properties as those of the main patent. <I> Example: </I> <B> 61.6 </B> parts of the disazo dye corresponding to the above formula are dissolved in <B> 1000 </B> parts of water, with 20 parts of <B> 2. </ B> 4-Dinitro-1-chlorobenzene and 20 parts of crystallized sodium acetate boiled for 10 hours under reflux.
The precipitated reaction product is filtered off after it has been obtained, washed suitably with a little very dilute salt water and dried.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE122751X | 1925-05-15 | ||
| CH120802T | 1926-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH122751A true CH122751A (en) | 1927-10-01 |
Family
ID=25709569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH122751D CH122751A (en) | 1925-05-15 | 1926-05-15 | Process for the preparation of a disazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH122751A (en) |
-
1926
- 1926-05-15 CH CH122751D patent/CH122751A/en unknown
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