CH281981A - Process for converting an azo dye. - Google Patents
Process for converting an azo dye.Info
- Publication number
- CH281981A CH281981A CH281981DA CH281981A CH 281981 A CH281981 A CH 281981A CH 281981D A CH281981D A CH 281981DA CH 281981 A CH281981 A CH 281981A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- azo dye
- converting
- dye
- azo
- Prior art date
Links
- 239000000987 azo dye Substances 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- -1 azo carbate Chemical compound 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C09B29/02—Monoazo dyes prepared by diazotising and coupling from diazotised o-amino-hydroxy compounds
-
- 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 Umwandlung eines Azofarbatoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Umwandlung eines Azo- farbstoffes, welches dadurch gekennzeichnet ist, dass man den durch saure Kupplung von 1 11o1 2 - I)iazobenzol - l - earbonsä.ure-.l-sulfon- säure mit 7 Mol 2 Amino-5-oxynaphthalin-7- sulfonsäure erhältlichen Azofarbstoff mit ver dünnter Salzsäure kocht.
<I>Beispiel:</I> 46,7 Teile des aus 2-Diazohenzol-1.-earbon- säure-.l-sulfons#ui e durch saure Kupplun auf 2-Amino-5-oly naphtlialiii-7-sulfonsäure erhält lichen Farbstoffes werden in 700 Teilen Was ser mit 35 Teilen konzentrierter Salzsäure 2 Stunden am Rückfluss gekocht.. Der neue Farbstoff wird durch Aussalzen und Filtra tion isoliert. Getrocknet. stellt er ein braun rotes Pulver dar, das sieh in konzentrierter Schwefelsäure mit rotstichig blauer Farbe löst.
Process for converting an azo carbate. The subject of the present patent is a process for converting an azo dye, which is characterized in that the acidic coupling of 1 11o1 2 -I) iazobenzene-1-carboxylic acid-.l-sulfonic acid with 7 mol 2 Amino-5-oxynaphthalene-7-sulfonic acid available azo dye boils with ver dilute hydrochloric acid.
<I> Example: </I> 46.7 parts of that obtained from 2-diazohenzene-1.-earbon- säure-.l-sulfone by acid coupling on 2-amino-5-oly naphthylialiii-7-sulfonic acid Union dye are refluxed for 2 hours in 700 parts of water with 35 parts of concentrated hydrochloric acid .. The new dye is isolated by salting out and Filtra tion. Dried. it represents a brown-red powder that dissolves in concentrated sulfuric acid with a reddish blue color.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH281981T | 1950-03-02 | ||
| CH278942T | 1950-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH281981A true CH281981A (en) | 1952-03-31 |
Family
ID=25731870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH281981D CH281981A (en) | 1950-03-02 | 1950-03-02 | Process for converting an azo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH281981A (en) |
-
1950
- 1950-03-02 CH CH281981D patent/CH281981A/en unknown
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