DE652819C - Process for the preparation of a yellow substantive cotton dye - Google Patents
Process for the preparation of a yellow substantive cotton dyeInfo
- Publication number
- DE652819C DE652819C DEI50916D DEI0050916D DE652819C DE 652819 C DE652819 C DE 652819C DE I50916 D DEI50916 D DE I50916D DE I0050916 D DEI0050916 D DE I0050916D DE 652819 C DE652819 C DE 652819C
- Authority
- DE
- Germany
- Prior art keywords
- preparation
- yellow
- cotton dye
- dye
- substantive cotton
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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
- C09B27/00—Preparations in which the azo group is formed in any way other than by diazotising and coupling, e.g. oxidation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines gelben substantiven Baumwollfarbstoffs Nach der Patentschrift 654o2 erhält man durch Einwirkung alkalischer Oxydationsmittel auf Dehydrothiotoluidinsulfosäure und ihre Homologen gelbe substantive Baumwollfarbstoffe.Process for the preparation of a yellow substantive cotton dye According to the patent specification 654o2, the action of alkaline oxidants is obtained on dehydrothiotoluidine sulfonic acid and its homologues yellow substantive cotton dyes.
Es wurde nun gefunden, daß man einen wesentlich lichtechteren, grünstichiggelben Farbstoff erhält, wenn man die in der Patentschrift :277395 beschriebene' 2-p-Aminophenyl-6-carboxybenzthiazolsulfosäure dem obigen Verfahren unterwirft.It has now been found that a significantly more lightfast, greenish yellow dye is obtained if the '2-p-aminophenyl-6-carboxybenzthiazolesulfonic acid described in patent specification: 277395 is subjected to the above process.
Beispiel In die Lösung von 35 Teilen 2-p-Aminophenyl-6-carboxybenzthiazolsulfosäure in 8 bis 9 Teilen Ätznatron und ßoo bis iooo Teilen Wasser läßt man unter gutem Rühren i 8o Teile einer Natriumhypochloritlösung, die ioo bis i 2o Teile aktives Chlor im Liter enthält, einfließen, rührt vorteilhaft mehrere Stunden bei Raumtemperatur nach und erhitzt dann zur Vollendung der Farbstoffbildung auf 7o bis 8o°. Der Farbstoff wird durch Aussalzen isoliert. Er bildet ein oranges, in Wasser leicht lösliches Pulver und färbt die pflanzliche Faser in einem grünstichigen, sehr lichtechten Gelb. In konz. Schwefelsäure löst er sich mit rotbrauner Farbe.Example Into the solution of 35 parts of 2-p-aminophenyl-6-carboxybenzthiazolesulfonic acid in 8 to 9 parts of caustic soda and 300 to 100 parts of water are left under good Stir i 8o parts of a sodium hypochlorite solution, the 100 to i 2o parts active Contains chlorine per liter, pour in, stir advantageously for several hours at room temperature and then heated to 7o to 8o ° to complete the dye formation. The dye is isolated by salting out. It forms an orange color that is easily soluble in water Powder and colors the vegetable fiber in a greenish, very lightfast Yellow. In conc. Sulfuric acid dissolves with a red-brown color.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI50916D DE652819C (en) | 1934-11-08 | 1934-11-08 | Process for the preparation of a yellow substantive cotton dye |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI50916D DE652819C (en) | 1934-11-08 | 1934-11-08 | Process for the preparation of a yellow substantive cotton dye |
Publications (1)
Publication Number | Publication Date |
---|---|
DE652819C true DE652819C (en) | 1937-11-09 |
Family
ID=7192939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEI50916D Expired DE652819C (en) | 1934-11-08 | 1934-11-08 | Process for the preparation of a yellow substantive cotton dye |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE652819C (en) |
-
1934
- 1934-11-08 DE DEI50916D patent/DE652819C/en not_active Expired
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