CH290300A - A process for preparing a disazo dye. - Google Patents
A process for preparing a disazo dye.Info
- Publication number
- CH290300A CH290300A CH290300DA CH290300A CH 290300 A CH290300 A CH 290300A CH 290300D A CH290300D A CH 290300DA CH 290300 A CH290300 A CH 290300A
- Authority
- CH
- Switzerland
- Prior art keywords
- orange
- preparing
- red
- dye
- molecule
- Prior art date
Links
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 title claims description 3
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000000975 dye Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- ZLHGMJOGMLVDFS-UHFFFAOYSA-N 7-benzamido-4-hydroxynaphthalene-2-sulfonic acid Chemical compound C=1C=C2C(O)=CC(S(O)(=O)=O)=CC2=CC=1NC(=O)C1=CC=CC=C1 ZLHGMJOGMLVDFS-UHFFFAOYSA-N 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000004627 regenerated cellulose Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000987 azo dye Substances 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 235000014066 European mistletoe Nutrition 0.000 description 1
- 235000012300 Rhipsalis cassutha Nutrition 0.000 description 1
- 241000221012 Viscum Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003086 colorant Substances 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
- 238000006193 diazotization reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/02—Disazo dyes
- C09B35/039—Disazo dyes characterised by the tetrazo component
- C09B35/28—Disazo dyes characterised by the tetrazo component the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O—
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
Description
Procédé de préparation -d'un colorant disazoïque. Le présent brevet a pour objet un procédé de préparation d'un colorant disazdïque. Ce procédé est caractérisé en ce que l'on diazote une molécule d'acide 4'-(4"-aminobenzoyl- amino)-1,1'-azobenzène-4,3'-disulfonique, puis on copule le diazdique ainsi obtenu avec une molécule d'acide 2-benzoylamino-5-hydroxy- naphtalène-7-sulfonique. <I>Exemple:
</I> On dissout 47,6 parties d'acide 4'-(4"- aminobenzoylamino) -1,1'- azobenzène -4,3' - di- sulfonique dans 250 parties d'eau à l'aide d'hydroxyde de sodium, on ajoute 7 parties de nitrite de sodiiun et on introduit lentement la solution dans un mélange de 45 parties d'acide chlorhydrique à 30 11/o et 100 parties de glace, de façon que la température se main tienne finalement à 5-10 .
Une fois la diazo- tation terminée, ce gui dure environ 3 heures, on fait couler lentement, en l'espace de 30 mi nutes, la suspension du diazdïque dans une solution neutre de 34,3 parties d'acide 2-ben- zoylamino-5-hydroxynaphtalène-7-sulfonique, en ajoutant simultanément du bicarbonate de sodium de façon à maintenir le pH de la solu tion entre 6,5 et 7,0. La copulation s'effectue rapidement et le colorant reste entièrement en solution.
On chauffe à 70 , on précipite le colorant par addition de sel, on le filtre et on le sèche.
Le nouveau colorant se présente sous forme d'une poudre rouge orangé qui se dissout dans l'eau avec une coloration orangée et dans l'acide sulfurique concentré avec une colora tion rouge. Il teint le -coton et la cellulose régénérée en des nuances vives, rouge orangé, très solides à la lumière et bien rongeables.
Process for the preparation of a disazo dye. The present patent relates to a process for preparing a disazdic dye. This process is characterized in that one diazotizes a 4 '- (4 "-aminobenzoyl-amino) -1,1'-azobenzene-4,3'-disulfonic acid molecule, then the diazdic thus obtained is copulated with a molecule of 2-benzoylamino-5-hydroxy-naphthalene-7-sulfonic acid. <I> Example:
</I> 47.6 parts of 4 '- (4 "- aminobenzoylamino) -1,1'-azobenzene -4,3' - disulfonic acid are dissolved in 250 parts of water with the aid of sodium hydroxide, 7 parts of sodium nitrite are added and the solution is slowly introduced into a mixture of 45 parts of 30% hydrochloric acid and 100 parts of ice, so that the temperature is finally maintained at 5 -10.
Once the diazotization is complete, this mistletoe lasts about 3 hours, the suspension of the diazdic is poured slowly over 30 minutes into a neutral solution of 34.3 parts of 2-benzoylamino acid. -5-hydroxynaphthalene-7-sulfonic acid, simultaneously adding sodium bicarbonate so as to maintain the pH of the solution between 6.5 and 7.0. Coupling takes place quickly and the dye remains completely in solution.
Heated to 70, the dye is precipitated by adding salt, filtered and dried.
The new colorant is in the form of an orange-red powder which dissolves in water with an orange color and in concentrated sulfuric acid with a red color. It dyes the cotton and the regenerated cellulose in bright, orange-red shades, very fast to light and easy to eat.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH290300T | 1951-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH290300A true CH290300A (en) | 1953-04-30 |
Family
ID=4487013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH290300D CH290300A (en) | 1951-04-27 | 1951-04-27 | A process for preparing a disazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH290300A (en) |
-
1951
- 1951-04-27 CH CH290300D patent/CH290300A/en unknown
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