AT61826B - Process for the preparation of disazo dyes. - Google Patents
Process for the preparation of disazo dyes.Info
- Publication number
- AT61826B AT61826B AT61826DA AT61826B AT 61826 B AT61826 B AT 61826B AT 61826D A AT61826D A AT 61826DA AT 61826 B AT61826 B AT 61826B
- Authority
- AT
- Austria
- Prior art keywords
- preparation
- dyes
- disazo dyes
- acid
- cotton
- Prior art date
Links
- 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
- 239000000975 dye Substances 0.000 title description 9
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 3
- 229960004889 salicylic acid Drugs 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 229920000742 Cotton Polymers 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 239000000344 soap Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Coloring (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Darstellung von Disazofarbatoffen.
EMI1.1
Diese Farbstoffe sind sehr schwer löslich und werden von Baumwolle nur langsam fixiert.
Für den Baumwolldruck haben sie wegen ihrer Schwerlöslichkeit keine Anwendung gefunden, da sich damit nur unansehnliche Töne erzielen lassen, die gegen Seife wenig 1 widerstandsfähig sind.
Es wurde nun gefunden, dass man durch Kuppeln von tetrazotierter Benzidin-
EMI1.2
der Färberei sowohl wie ganz besonders für den Baumwolldruck wegen ihrer leichten Löslichkeit und wegen ihrer hervorragenden Echtheitseigenschaften geeignet sind. Dieses Resultat war nicht zu erwarten, da die Farbstoffe aus Benzidin bzw. Tolidin und Salizylsäure trotz ihrer schweren Löslichkeit im Baumwolldruck nur wenig seifenocht sind und anzunehmen war, dass durch Einführuug von zwei Sulfogruppen noch weniger seifenechte Farbstoffe entstehen würden. Die neuen Farbstoffe sind aber ganz hervorragend echt, sowohl gegen Seife wie gegen Soda, Chlor und Licht und übertreffen in diesen Eigenschaften alle bisher bekannten, für den Baumwolldruck verwendoten Azofarbstoffe.
Als besonders wertvoll ist die Eigenschaft der neuen Farbstoffe zu bezeichnen, dass sie nach dem Drucken und Dämpfen beim Spülen mit Wasser absolut keinen Farbstoff abgeben, d. h. das Spülwasser bleibt farblos.
EMI1.3
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werden mit 8 kg Ätznatron oder 10#6 kg Soda und 300 l Wasser gelöst, nach Zusatz einer konzentrierten Lösung von 14 kg Natriumnitrit in eine Mischung von 50 leg Salz- säure und 100 kg Eis unter gutem Rühren eingegossen, wobei durch Eiszusatz die Temperatur auf etwa 3 bis 5"C gehalten wird. Dabei scheidet sich die Tetrazodiphenyldisulfosäure zum grössten Teil aus.
Nach vollendetem Zusatz wird noch einige Zeit gerührt und dann die dünnflüssige Paste in eine kalte Lösung von 28 kg Salizylsäure in 30 kg Soda und 150 l Wasser eingetragen. Die Kupplung wird in bekannter Weise durch Zusatz von Natronlauge beendigt und der Farbstoff ausgesalzen, filtriert und getrocknet.
Er stellt ein gelbes ruher dar, ist in Wasser spielend leicht löslich und finit) t Wolle in lebhaft gelben Tönen. Mit Chrombeize auf Baumwolle entsteht ein leuchtendes Gelb, wie es bisher mit keinem anderen Farbstoff erzielt werden konnte.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the preparation of disazo carbates.
EMI1.1
These dyes are very sparingly soluble and are only fixed slowly by cotton.
They have not been used for cotton printing because of their poor solubility, since they can only be used to achieve unsightly tones that are not very resistant to soap.
It has now been found that by coupling tetrazotized benzidine
EMI1.2
both in dyeing and especially for cotton printing because of their easy solubility and their excellent fastness properties. This result was not to be expected, since the dyes made from benzidine or tolidine and salicylic acid are only slightly soapy in spite of their poor solubility in cotton printing and it was to be assumed that the introduction of two sulfo groups would result in even less soap-resistant dyes. However, the new dyes are extremely fast, both against soap and against soda, chlorine and light and in these properties surpass all previously known azo dyes used for cotton printing.
Particularly valuable is the property of the new dyes that, after printing and steaming, they give off absolutely no dye when rinsing with water. H. the rinsing water remains colorless.
EMI1.3
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are dissolved with 8 kg of caustic soda or 10 # 6 kg of soda and 300 l of water, after adding a concentrated solution of 14 kg of sodium nitrite in a mixture of 50 μg hydrochloric acid and 100 kg of ice poured with thorough stirring, the temperature being raised by adding ice about 3 to 5 "C. The tetrazodiphenyldisulfonic acid separates out for the most part.
After the addition is complete, the mixture is stirred for some time and then the thin paste is added to a cold solution of 28 kg of salicylic acid in 30 kg of soda and 150 l of water. The coupling is terminated in a known manner by adding sodium hydroxide solution and the dye is salted out, filtered and dried.
It represents a yellow calm, is easily soluble in water and finite wool in lively yellow tones. With chrome stain on cotton, a bright yellow is created that could not be achieved with any other dye.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE61826X | 1912-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT61826B true AT61826B (en) | 1913-10-25 |
Family
ID=5631131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT61826D AT61826B (en) | 1912-08-30 | 1912-12-04 | Process for the preparation of disazo dyes. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT61826B (en) |
-
1912
- 1912-12-04 AT AT61826D patent/AT61826B/en active
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