CH203594A - Process for the preparation of a water-soluble azo dye. - Google Patents
Process for the preparation of a water-soluble azo dye.Info
- Publication number
- CH203594A CH203594A CH203594DA CH203594A CH 203594 A CH203594 A CH 203594A CH 203594D A CH203594D A CH 203594DA CH 203594 A CH203594 A CH 203594A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- soluble azo
- azo dye
- preparation
- brown
- Prior art date
Links
- 239000000987 azo dye Substances 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 4
- 238000002360 preparation method Methods 0.000 title description 2
- 239000000975 dye Substances 0.000 claims description 4
- -1 sulfoethylamino Chemical group 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- HVBSAKJJOYLTQU-UHFFFAOYSA-N 4-aminobenzenesulfonic acid Chemical compound NC1=CC=C(S(O)(=O)=O)C=C1 HVBSAKJJOYLTQU-UHFFFAOYSA-N 0.000 claims description 2
- 239000010985 leather Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- IGWIEYXEWVUGCK-UHFFFAOYSA-N 4-aminobenzenesulfonic acid;sodium Chemical compound [Na].NC1=CC=C(S(O)(=O)=O)C=C1 IGWIEYXEWVUGCK-UHFFFAOYSA-N 0.000 description 1
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical class [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000000243 solution 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
-
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
- C09B29/28—Amino naphthols
- C09B29/30—Amino naphtholsulfonic acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines wasserlöslichen Azofarbstoffes. Gegenstand des vorliegenden Zusatz patentes ist ein Verfahren zur Herstellung eines wasserlöslichen Azofarbstoffes, welches dadurch gekennzeichnet ist, dass man diano tierte p-Aminobenzolmonosulfonsäure mit 2 (Sulfoäthylamino)-8-naphtol-6-sulfonsäure in alkalischem Medium vereinigt.
<I>Beispiel:</I> 29,9 Gewichtsteile p-aminobenzolmono- sulfonsaures Natrium (Mol. Gew. 299) wer den in 400 Volumteilen Wässer bei 65 C gelöst, unter Rühren auf<B>10'</B> C gekühlt und mit gesättigter Natriumchloridlösung so weit ausgefällt, dass der Auslauf auf Filtrier papier nur noch gering ist. Dann wird mit 6,9 Gewichtsteilen Natriumnitrit versetzt, 10 Minuten nachgerührt, und 30 Volumteile roher Salzsäure von 20' B6 werden schnell hinzugefügt.
Nach beendeter Dianotierung wird bei 0 C langsam in eine sodaalkalische Lösung von 41 Gewichtsteilen des Dinatrium- salzes der 2-(Sulfoäthylamino)-8-naphtol-6- sulfonsäure gegeben. Die Endreaktion muss sodaalkalisch sein. Der gebildete Farbstoff wird wie üblich isoliert und getrocknet.
Er bildet ein braunes Pulver, das sich in Wasser mit brauner Farbe löst und Leder in tiefbraunen Tönen einfärbt.
Process for the preparation of a water-soluble azo dye. The subject of the present additional patent is a process for the production of a water-soluble azo dye, which is characterized in that diano-oriented p-aminobenzene monosulfonic acid is combined with 2 (sulfoethylamino) -8-naphthol-6-sulfonic acid in an alkaline medium.
<I> Example: </I> 29.9 parts by weight of p-aminobenzene monosulfonic acid sodium (mol. Wt. 299) are dissolved in 400 parts by volume of water at 65 ° C., with stirring to <B> 10 '</B> C cooled and precipitated with saturated sodium chloride solution so far that the leakage on filter paper is only slight. Then 6.9 parts by weight of sodium nitrite are added, stirring is continued for 10 minutes, and 30 parts by volume of crude hydrochloric acid of 20 'B6 are quickly added.
When the dianotization is complete, it is slowly added at 0 ° C. to a soda-alkaline solution of 41 parts by weight of the disodium salt of 2- (sulfoethylamino) -8-naphthol-6-sulfonic acid. The end reaction must be soda-alkaline. The dye formed is isolated as usual and dried.
It forms a brown powder that dissolves in water with a brown color and dyes leather in deep brown tones.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE203594X | 1935-10-15 | ||
| CH199460T | 1938-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH203594A true CH203594A (en) | 1939-03-15 |
Family
ID=25723291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH203594D CH203594A (en) | 1935-10-15 | 1936-10-09 | Process for the preparation of a water-soluble azo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH203594A (en) |
-
1936
- 1936-10-09 CH CH203594D patent/CH203594A/en unknown
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