DE578153C - Process for the preparation of brown dyes - Google Patents

Process for the preparation of brown dyes

Info

Publication number
DE578153C
DE578153C DEH115839D DEH0115839D DE578153C DE 578153 C DE578153 C DE 578153C DE H115839 D DEH115839 D DE H115839D DE H0115839 D DEH0115839 D DE H0115839D DE 578153 C DE578153 C DE 578153C
Authority
DE
Germany
Prior art keywords
chloranil
brown
preparation
dyes
brown dyes
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
Application number
DEH115839D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Holliday Co Ltd L B
JOE KITSON
Original Assignee
Holliday Co Ltd L B
JOE KITSON
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Holliday Co Ltd L B, JOE KITSON filed Critical Holliday Co Ltd L B
Application granted granted Critical
Publication of DE578153C publication Critical patent/DE578153C/en
Expired legal-status Critical Current

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
    • C09B59/00—Artificial dyes of unknown constitution

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

Verfahren zur Darstellung brauner Farbstoffe Die Erfindung betrifft ein Verfahren zur Herstellung brauner Farbstoffe und beruht darauf, daß durch Hydrolyse von Chloranil oder Bromanil Farbstoffe erhalten werden können, welche gebeizte oder ungebeizte Wolle und Seide echt anfärben. E,s ist gefunden worden, daß bei Behandlung von Chloranil mit verdünntem Ätznatron bei mäßiger Temperatur ein braunes Produkt entsteht gemeinsam mit dem bekannten Natriumsalz des 2, 5-Dioxy-3, 6-dichlorbenzochinons. Wird von dem unveränderten Chloranil und dem Natriumsalz des Dioxydichlorbenzochinons abgefiltert und das braune Filtrat mit Chlorwasserstoffsäure oder ähnlichen Säuren versetzt, so scheidet sich der braune Farbstoff in Form eines Niederschlages aus. Beispiele i. i kg Chloranil wird mit o,61 35°Jaiger Atznatronlösung und 15 1 Wasser bei 4.o° C während 2o Stunden er-,Wärmt. Nach dem Abkühlen wird von dem unveränderten Chloranil und dem Natriumsalz des Dioxydichlorbenzochinons abgefiltert und der Farbstoff aus dem Filtrat durch Ausfällen oder Aussahen getrennt.Method of Preparing Brown Dyes The invention relates to a process for the production of brown dyes and is based on that by hydrolysis from chloranil or bromanil dyes can be obtained which are stained or Real dyeing of unstained wool and silk. It's been found that when treating of chloranil with dilute caustic soda at a moderate temperature a brown product formed together with the well-known sodium salt of 2, 5-dioxy-3, 6-dichlorobenzoquinone. Made from the unchanged chloranil and the sodium salt of dioxydichlorobenzoquinone filtered off and the brown filtrate with hydrochloric acid or similar acids added, the brown dye separates out in the form of a precipitate. Examples i. 1 kg of chloranil is mixed with 0.61 35 ° caustic soda solution and 15 liters of water heated at 40 ° C for 20 hours. After cooling it will be unchanged from the Chloranil and the sodium salt of dioxydichlorobenzoquinone are filtered off and the dye separated from the filtrate by precipitation or sighting.

Wird Sodalösung anstatt des Ätznatrons verwendet, so wird ebenfalls ein brauner Farbstoff erzielt, welcher Wolle und Seide anfärbt.If soda solution is used instead of caustic soda, it is also used a brown dye is obtained, which dyes wool and silk.

2. 8 kg Chloranil werden mit 5 kg Natriumkarbonat und ioo 1 Wasser bei 8o° C während zwei Stunden erhitzt, das unveränderte Chloranil und das Natriumsalz des Dioxydichlorbenzochinons abgefiltert und der braune Farbstoff aus dem Filtrat durch Chlorwasserstoffsäure ausgefällt.2. 8 kg of chloranil are mixed with 5 kg of sodium carbonate and 100 l of water heated at 80 ° C for two hours, the unchanged chloranil and the sodium salt of the dioxydichlorobenzoquinone filtered off and the brown dye from the filtrate precipitated by hydrochloric acid.

Es kann in den angeführten Beispielen das Chloranil durch Bromanil ersetzt werden, wodurch abweichende braune Farbtöne erzeugt werden.In the examples given, chloranil can be replaced by bromanil can be replaced, creating different brown shades.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung brauner Farbstoffe, dadurch gekennzeichnet, daß man Chloranil in wässerigem Alkali erhitzt, darauf von dem unlöslichen, aus Alkalisalz des 2, 5-Dioxy-3, 6-dichlorbenzochinons und unverändertem Chloranil bestehenden Rückstand abfiltriert und aus dem Filtrat den Farbstoff ausfällt. PATENT CLAIMS: i. Process for the production of brown dyes, characterized in that chloranil is heated in aqueous alkali, then the insoluble residue consisting of the alkali salt of 2,5-dioxy-3, 6-dichlorobenzoquinone and unchanged chloranil is filtered off and the dye precipitates from the filtrate. 2. Ausführungsform des Verfahrens nach Anspruch i, gekennzeichnet durch die Verwendung von Bromanil an Stelle des Chloranils.2. Embodiment of the method according to claim i, characterized by the use of bromanil in place of chloranil.
DEH115839D 1927-03-30 1928-03-25 Process for the preparation of brown dyes Expired DE578153C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB578153X 1927-03-30

Publications (1)

Publication Number Publication Date
DE578153C true DE578153C (en) 1933-06-10

Family

ID=10480092

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH115839D Expired DE578153C (en) 1927-03-30 1928-03-25 Process for the preparation of brown dyes

Country Status (1)

Country Link
DE (1) DE578153C (en)

Similar Documents

Publication Publication Date Title
DE578153C (en) Process for the preparation of brown dyes
DE241910C (en)
DE578735C (en) Process for the preparation of brown dyes
DE536997C (en) Process for the preparation of 1-methyl-4-chloro-3-oxybenzene-2-carboxylic acid
DE542801C (en) Process for the production of real Kuepen dyes
DE468757C (en) Process for the preparation of aminoarylarsic acids and their derivatives
DE364036C (en) Process for the preparation of akridine derivatives
DE515680C (en) Process for the preparation of pyrazolanthrone-2-carboxylic acid
DE817754C (en) Process for the isolation of piperazine from reaction mixtures containing it
DE510452C (en) Process for the preparation of 2,4'-oxyarylaminonaphthalenecarboxylic acids
CH228850A (en) Process for the production of a new anthraquinone dye.
CH149623A (en) Process for the production of a sulfur dye.
CH215043A (en) Process for the preparation of an azo dye.
CH199465A (en) Process for the preparation of a dye of the anthraquinone series.
CH144485A (en) Process for the preparation of a disazo dye.
CH167040A (en) Process for the production of a metal-containing dye.
CH211819A (en) Process for the preparation of an azo dye.
DEM0005837MA (en) Process for the production of o-aminothiophenol or its alkali salts
CH115461A (en) Process for the production of a new azo dye.
CH153382A (en) Process for the preparation of an o-amino-p-cresol carboxylic acid.
CH148348A (en) Process for the preparation of an m-oxy-phenylarylamine carboxylic acid.
CH145851A (en) Process for the production of a metal-containing dye.
CH148349A (en) Process for the preparation of an m-oxy-phenylarylamine carboxylic acid.
CH157526A (en) Process for the production of a new azo dye.
CH185839A (en) Process for the production of a new azo dye.