CH158133A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH158133A
CH158133A CH158133DA CH158133A CH 158133 A CH158133 A CH 158133A CH 158133D A CH158133D A CH 158133DA CH 158133 A CH158133 A CH 158133A
Authority
CH
Switzerland
Prior art keywords
preparation
vat dye
reaction
strongly alkaline
carried out
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH158133A publication Critical patent/CH158133A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines     Küpenfarbstoffes.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung eines     Küpenfarb-          stoffes,    welches dadurch gekennzeichnet ist,  dass man     1.4-Di-(2'.4'dichlorbenzoyl)-naphtba-          lin    mit einem stark alkalischen Kondensa  tionsmittel behandelt.    <I>Beispiel:</I>  47 Gewichtsteile     1.4-Di-(2'.4'-dichlorben-          zoyl)-naphtbalin    (farblose Nadeln, F.

   P. 188  189  , darstellbar aus 1 .     4-Naphthalindicar-          bonsäurechlorid    und     m-Dichlorbenzol)    werden  mit 400 Gewichtsteilen     Chinolin    und 30 Ge  wichtsteilen     Ätzkali    5 Minuten zum Sieden  erhitzt. Man verdünnt. mit Alkohol und saugt  ab. Der braune Rückstand wird nach dem  Auswaschen mit     Hypochloritlösung    behandelt,  wobei der reine Farbstoff in Form einer klar  rotorangefarbenen Paste erhalten wird. Der  so erhältliche Farbstoff ist das bekannte     Di-          chlor-4.    5 . 8 .     9-dibenzpyrenchinon-3    .10.



  Process for the preparation of a vat dye. The subject of this additional patent is a process for the preparation of a vat dye, which is characterized in that 1,4-di- (2'.4'-dichlorobenzoyl) -naphtba- lin is treated with a strongly alkaline condensation agent. <I> Example: </I> 47 parts by weight of 1.4-di- (2'.4'-dichlorobenzoyl) -naphtbalin (colorless needles, F.

   P. 188 189, can be shown from 1. 4-naphthalenedicarboxylic acid chloride and m-dichlorobenzene) are heated to the boil for 5 minutes with 400 parts by weight of quinoline and 30 parts by weight of caustic potash. One dilutes. with alcohol and sucks off. After washing, the brown residue is treated with hypochlorite solution, the pure dye being obtained in the form of a clear red-orange paste. The dye obtainable in this way is the well-known dichlor-4. 5. 8th . 9-dibenzpyrenquinone-3 .10.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man 1.4-Di-(2'.4'-Dichlorbenzoyl)-naphthalin mit einem stark alkalischen Kondensationsmittel behandelt. UNTERANSPRÜCHE: 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als stark alkali sches Kondensationsmittel Ätzkali ver wendet. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reaktion in Gegenwart eines Verdünnungsmittels durch führt. 3. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reaktion in Gegenwart von Chinolin durchführt. PATENT CLAIM: Process for the preparation of a vat dye, characterized in that 1,4-di- (2'.4'-dichlorobenzoyl) naphthalene is treated with a strongly alkaline condensing agent. SUBClaims: 1. Method according to claim, characterized in that caustic potash is used as the strongly alkaline condensation agent. 2. The method according to claim, characterized in that the reaction is carried out in the presence of a diluent. 3. The method according to claim, characterized in that the reaction is carried out in the presence of quinoline.
CH158133D 1930-05-19 1931-05-18 Process for the preparation of a vat dye. CH158133A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE158133X 1930-05-19
CH154511T 1931-05-18

Publications (1)

Publication Number Publication Date
CH158133A true CH158133A (en) 1932-10-31

Family

ID=25716459

Family Applications (1)

Application Number Title Priority Date Filing Date
CH158133D CH158133A (en) 1930-05-19 1931-05-18 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH158133A (en)

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