CH149319A - Process for the preparation of an acetate silk dye. - Google Patents
Process for the preparation of an acetate silk dye.Info
- Publication number
- CH149319A CH149319A CH149319DA CH149319A CH 149319 A CH149319 A CH 149319A CH 149319D A CH149319D A CH 149319DA CH 149319 A CH149319 A CH 149319A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- acetate silk
- dye
- silk dye
- anhydride
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Acetatseidenfarbstoffes. Gegenstand des vorliegenden Zusatzpaten tes ist ein Verfahren zur Darstellung eines Acetatseidenfarbstoffes, welches dadurch ge kennzeichnet ist, dass man 4-Aminonaphtal- säureanhydrid mit Phenylhydrazin kondensiert. Mit dem gleichen Resultat kann man auch die Aminonaphtalsäure selbst als Ausgangs stoff verwenden. Die Umsetzung mit Phenyl- hydrazin verläuft zweifellos über das Anhy- drid dieser Säure.
<I>Beispiel:</I> <B>100</B> Gewichtsteile 4-Aminonaphtalsäure werden mit ca. <B>300</B> Gewichtsteilen Phenyl- hydrazin <B>6</B> Stunden auf 2000 bis 2100 er hitzt. Nach dem Erkalten wird der neue Farbstoff abgesaugt und mit Sprit gewaschen. Das Rohprodukt kann zum Beispiel aus Nitrobenzol umgelöst werden, es kristallisiert in braungelben Nadeln, die bei<B>300'</B> noch nicht geschmolzen sind.
<B>-</B> Die Analyse ergab 13,89 % N, berechnet sind<B>13,93</B> 0/..
Es färbt Zellulose-Ester oder -Äther in einem klaren grünsticbigen Gelb.
Process for the preparation of an acetate silk dye. The subject of the present additional patent is a process for the preparation of an acetate silk dye, which is characterized in that 4-aminonaphthalic anhydride is condensed with phenylhydrazine. With the same result, you can also use aminonaphthalic acid itself as a starting material. The reaction with phenylhydrazine undoubtedly proceeds via the anhydride of this acid.
<I> Example: </I> <B> 100 </B> parts by weight of 4-aminonaphthalic acid with approx. <B> 300 </B> parts by weight of phenylhydrazine <B> 6 </B> hours for 2000 to 2100 he heats up. After cooling, the new dye is sucked off and washed with fuel. The crude product can, for example, be redissolved from nitrobenzene; it crystallizes in brown-yellow needles that have not yet melted at <B> 300 '</B>.
<B> - </B> The analysis showed 13.89% N, the calculated values are <B> 13.93 </B> 0 / ..
It turns cellulose esters or ethers a clear greenish yellow.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH140716T | 1929-01-23 | ||
| DE149319X | 1930-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH149319A true CH149319A (en) | 1931-08-31 |
Family
ID=25713588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH149319D CH149319A (en) | 1929-01-23 | 1930-06-11 | Process for the preparation of an acetate silk dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH149319A (en) |
-
1930
- 1930-06-11 CH CH149319D patent/CH149319A/en unknown
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