CH155458A - Process for the preparation of a brown wool dye. - Google Patents
Process for the preparation of a brown wool dye.Info
- Publication number
- CH155458A CH155458A CH155458DA CH155458A CH 155458 A CH155458 A CH 155458A CH 155458D A CH155458D A CH 155458DA CH 155458 A CH155458 A CH 155458A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- acid
- brown
- preparation
- yellow
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 6
- 238000002360 preparation method Methods 0.000 title claims description 4
- 210000002268 wool Anatomy 0.000 title claims description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- ADTKEYLCJYYHHH-UHFFFAOYSA-N 2-chloro-3,5-dinitrobenzoic acid Chemical compound OC(=O)C1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1Cl ADTKEYLCJYYHHH-UHFFFAOYSA-N 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 159000000000 sodium salts Chemical group 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims 3
- 239000011230 binding agent Substances 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 229960000583 acetic acid Drugs 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines braunen Wollfarbstoffes. Die vorliegende Erfindung betrifft ein Verfahren zur Darstellung eines braunen Wollfarbstoffes, welches dadurch gekennzeich net ist, dass 3.5-Dinitro-2-chlorbenzoesäure und Hydrazin in einem organischen Lösungs mittel bei Siedetemperatur zusammen kon densiert werden.
Der neue Farbstoff bildet eine gelbe, kristalline Farbstoffsäure, unlöslich in kaltem, wenig löslich mit gelbbrauner Farbe in heissem Wasser; in Alkalien löst er sich leicht tief braun. Konzentrierte Schwefelsäure nimmt den Farbstoff farblos auf. Das Natriumsalz bildettiefbraunschwarze, grünlich schimmernde feine Prismen.
<I>Beispiel:</I> In methylalkoholischer Lösung lässt man 50 Gewichtsteile Hydrazinhydrat und 246 Gewichtsteile 3.5-Dinitro-2-chlorbenzoesäure in Gegenwart von 136 Gewichtsteilen kristal- ilisertem Natriumacetat bei Siedeterüperatur aufeinander einwirken. Nach kurzer Zeit hat sich der gebildete Farbstoff als schwarzbraune kristalline lasse ausgeschieden. Das Natrium salz kristallisiert aus Wasser in feinen dun kelbraunen Nadeln; die freie Farbstoffsäure bildet aus Eisessig umkristallisiert derbe gelbe Kristalle.
Process for the preparation of a brown wool dye. The present invention relates to a process for the preparation of a brown wool dye, which is characterized in that 3,5-dinitro-2-chlorobenzoic acid and hydrazine are condensed together in an organic solvent at the boiling point.
The new dye forms a yellow, crystalline dye acid, insoluble in cold, slightly soluble with a yellow-brown color in hot water; in alkalis it dissolves easily in a deep brown color. Concentrated sulfuric acid absorbs the dye colorless. The sodium salt forms deep brown-black, greenish shimmering fine prisms.
<I> Example: </I> In a methyl alcoholic solution, 50 parts by weight of hydrazine hydrate and 246 parts by weight of 3,5-dinitro-2-chlorobenzoic acid are allowed to act on one another in the presence of 136 parts by weight of crystallized sodium acetate at boiling temperature. After a short time, the dye formed has precipitated as black-brown crystalline leaves. The sodium salt crystallizes from water in fine dark brown needles; the free dye acid forms solid yellow crystals recrystallized from glacial acetic acid.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE155458X | 1930-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH155458A true CH155458A (en) | 1932-06-30 |
Family
ID=5677027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH155458D CH155458A (en) | 1930-07-28 | 1931-07-28 | Process for the preparation of a brown wool dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH155458A (en) |
-
1931
- 1931-07-28 CH CH155458D patent/CH155458A/en unknown
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