CH179685A - Process for the production of a new vat dye. - Google Patents
Process for the production of a new vat dye.Info
- Publication number
- CH179685A CH179685A CH179685DA CH179685A CH 179685 A CH179685 A CH 179685A CH 179685D A CH179685D A CH 179685DA CH 179685 A CH179685 A CH 179685A
- Authority
- CH
- Switzerland
- Prior art keywords
- nitrobenzene
- production
- zinc chloride
- dihydro
- bromine
- Prior art date
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
- C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
- C09B5/24—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2 or 2-3 position
- C09B5/44—Azines of the anthracene series
Description
Zusatzpatent zum Hauptpatent Nr. 176037. Verfahren zur Herstellung eines Itüpenfarbstoffes. Es wurde gefunden, dass man einen grünstich blau färbenden Küpenfarbstoff erhält, wenn man Dihydro-1 . 2 .<B>l',</B> 2'-an- thrachinonazin in nitrobenzolischem Medium in Gegenwart von mindestens 5 % Chlorzink mit etwa 1,2 'feilen Brom bromiert. Das so erhaltene Produkt, das einen Bromgehalt von etwa 28/'0 aufweist, bildet ein dunkles Pulver, das sich in konzentrierter Schwefel säure mit gelber Farbe löst.
Dasselbe gibt eine blaue Küpe, aus der Baumwolle in rei nen, grünstichig blauen Tönen gefärbt wird, die eine bedeutend bessere Chlorechtheit be sitzen, als diejenigen, die mit einem Bromie- rungsprodukt von gleichem Bromgehalt, das durch Bromieren von Dihvdro-1 . 2. 1'. 2' . - anthrachinonazin in Nitrobenzol ohne Zusatz von Chlorzink hergestellt worden ist, erhal ten werden.
<I>Beispiel:</I> 1 Teil Dihydro-1 . 2 . 1' . 2'-anthrachinon- azin und 0,4 Teile wasserfreies Zinkchlorid werden in 16 Teilen trockenem Nitrobenzol unter Rühren auf 180 erwärmt. Dann lässt man innert etwa 6 Stunden 1,2 Teile Brom, gelöst in 8 Teilen Nitrobenzol, zutropfen, unter Innehaltung einer Temperatur von 180 bis 185 .
Nach beendeter Bromzugabe lässt man noch 4 Stunden nachreagieren und hier auf erkalten. 14Tan saugt ab und behandelt den Nutschkuchen unter Zusatz von Soda mit Wasserdampf. Der nitrobenzolfreie Rückstand wird filtriert, mit Wasser, dann mit verdünnter Salzsäure, und zuletzt wieder mit Wasser ausgewaschen und getrocknet.
Additional patent to the main patent No. 176037. Process for the production of an Itupen dye. It has been found that a greenish blue vat dye is obtained if Dihydro-1. 2. <B> 1 ', </B> 2'-anthrachinonazine brominated in a nitrobenzene medium in the presence of at least 5% zinc chloride with about 1.2% bromine. The product thus obtained, which has a bromine content of about 28 / '0, forms a dark powder which dissolves in concentrated sulfuric acid with a yellow color.
The same thing gives a blue vat from which cotton is dyed in pure, greenish blue tones, which have significantly better chlorine fastness than those made with a bromination product of the same bromine content, which is obtained by brominating Dihvdro-1. 2. 1 '. 2 '. - Anthraquinone azine has been produced in nitrobenzene without the addition of zinc chloride, can be obtained.
<I> Example: </I> 1 part Dihydro-1. 2. 1' . 2'-anthraquinone azine and 0.4 part of anhydrous zinc chloride are heated to 180 in 16 parts of dry nitrobenzene with stirring. Then 1.2 parts of bromine, dissolved in 8 parts of nitrobenzene, are added dropwise over the course of about 6 hours, while maintaining a temperature of 180 to 185.
After the addition of bromine has ended, the reaction is allowed to continue for 4 hours and then cool down. 14Tan sucks off and treats the filter cake with water vapor while adding soda. The nitrobenzene-free residue is filtered, washed with water, then with dilute hydrochloric acid, and finally again with water and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH176037T | 1934-05-19 | ||
CH179685T | 1934-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH179685A true CH179685A (en) | 1935-09-15 |
Family
ID=25719799
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH179685D CH179685A (en) | 1934-05-19 | 1934-05-19 | Process for the production of a new vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH179685A (en) |
-
1934
- 1934-05-19 CH CH179685D patent/CH179685A/en unknown
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