CH179683A - Process for the production of a new vat dye. - Google Patents

Process for the production of a new vat dye.

Info

Publication number
CH179683A
CH179683A CH179683DA CH179683A CH 179683 A CH179683 A CH 179683A CH 179683D A CH179683D A CH 179683DA CH 179683 A CH179683 A CH 179683A
Authority
CH
Switzerland
Prior art keywords
production
red
nitrobenzene
bromine
vat dye
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH179683A publication Critical patent/CH179683A/en

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
    • C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/40—Pyranthrones
    • C09B3/44—Preparation from starting materials already containing the pyranthrone nucleus
    • C09B3/46—Preparation from starting materials already containing the pyranthrone nucleus by halogenation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Coloring (AREA)

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>176037.</B>    Verfahren zur Herstellung eines     Hüpenfarbstoffes.       Es wurde gefunden,     dass    man einen rein       rotoranwe    färbenden     Küpenfarbstoff    erhält.,  wenn man     Pyranthron.    in     nitröbenzolisehem     Medium in Gegenwart von mindestens<B>5 %</B>  Chlorzink mit etwa 1,4 Teilen Brom     bro-          miert.    Das so erhaltene Produkt, das einen  Bromgehalt von etwa<B>228 %</B> aufweist, bildet  ein rotes Pulver, das sich. in konzentrierter  Schwefelsäure mit blauer Farbe löst.

   Das  selbe gibt eine blauviolette     Küpe,    aus der  Baumwolle in reinen rotorangen Tönen ge  färbt wird, die röter sind als diejenigen, die  mit einem     Bromierungsprodukt    von gleichem  Bromgehalt, das durch     Bromieren    des     Pyr-          anthrons    in Nitrobenzol ohne Zusatz von  Chlorzink hergestellt worden ist, erhalten  werden.  



  <B>b</B><I>Beispiel:</I>       L,'l    Teil     Pyranthron    und<B>0,5</B> Teile wasser-  
EMI0001.0017     
  
     erwärmt. Dann     lässt    man innert etwa<B>6</B> Stun  den 1,4 Teile Brom, gelöst in<B>8</B> Teilen     Ni-          trobenzol,        zutropfen,        unterInnehaltung    einer  Temperatur von<B>180</B> bis<B>185</B>     '.    Nach been  deter Bromzugabe     lässt    man noch 4 Stunden       nachreagieren    und hierauf erkalten. Man  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 main patent no. <B> 176037. </B> Process for the production of a Hüpen dye. It has been found that a vat dye which stains purely rotoranwe is obtained if pyranthrone is used. Brominated in nitrobenzolene medium in the presence of at least <B> 5% </B> zinc chloride with about 1.4 parts of bromine. The product obtained in this way, which has a bromine content of about 228%, forms a red powder that forms. dissolves in concentrated sulfuric acid with a blue color.

   The same gives a blue-violet vat from which cotton is dyed in pure red-orange tones, which are redder than those obtained with a bromination product of the same bromine content, which has been prepared by brominating the pyranthone in nitrobenzene without the addition of zinc chloride will.



  <B>b</B> <I> Example: </I> L, 'l part of pyranthrone and <B> 0.5 </B> parts of water
EMI0001.0017
  
     warmed up. Then 1.4 parts of bromine, dissolved in <B> 8 </B> parts of nitrobenzene, are added dropwise within about <B> 6 </B> hours while maintaining a temperature of <B> 180 </B> to <B> 185 </B> '. After the addition of bromine has ended, the reaction is allowed to continue for 4 hours and then allowed to cool. It is filtered off with suction and the filter cake is treated with steam with the addition of soda.

    The nitrobenzene-free residue is filtered, washed with water, then with dilute hydrochloric acid and finally again with water and dried.

Claims (1)

UNTERANSPRüCHE, Verfahren zur Herstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man Pyranthron in nitrobenzolischem Me dium in Gegenwart von mindestens äro Chlorzink mit etwa 1,4 Teilen Brom bro- miert. Das so erhaltene Produkt, das einen Brom gehalt von etwa<B>28</B> % aufweist, bildet ein rotes Pulver, das sieh in konz. Schwefelsäure mit blauer Farbe löst. SUBSTANTIAL CLAIMS, process for the production of a vat dye, characterized in that pyranthrone is brominated in nitrobenzene medium in the presence of at least anhydrous zinc chloride with about 1.4 parts of bromine. The product obtained in this way, which has a bromine content of about 28%, forms a red powder which can be seen in conc. Sulfuric acid with a blue color dissolves. Dasselbe gibt eine violeitrote Küpe, aus der Baumwolle in rei nen, rotorangen Tönen gefärbt wird, die röter sind als diejenigen, die mit einem Bromierungsprodukt von gleichem Brom- gehalt. das durch Bromieren des Pyran- throns in Nitrobenzol ohne Zusatz von Chlor zink hergestellt worden ist, erhalten werden. The same thing gives a purple-red vat from which cotton is dyed in pure, red-orange tones, which are redder than those made with a bromination product of the same bromine content. which has been prepared by brominating the pyranothrone in nitrobenzene without the addition of chlorine zinc, can be obtained.
CH179683D 1934-05-19 1934-05-19 Process for the production of a new vat dye. CH179683A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH179683T 1934-05-19
CH176037T 1934-05-19

Publications (1)

Publication Number Publication Date
CH179683A true CH179683A (en) 1935-09-15

Family

ID=25719797

Family Applications (1)

Application Number Title Priority Date Filing Date
CH179683D CH179683A (en) 1934-05-19 1934-05-19 Process for the production of a new vat dye.

Country Status (1)

Country Link
CH (1) CH179683A (en)

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