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AT66048B - Process for the production of indigo dyes in finely divided form. - Google Patents

Process for the production of indigo dyes in finely divided form.

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Publication number
AT66048B
AT66048B AT66048DA AT66048B AT 66048 B AT66048 B AT 66048B AT 66048D A AT66048D A AT 66048DA AT 66048 B AT66048 B AT 66048B
Authority
AT
Austria
Prior art keywords
finely divided
production
divided form
indigo dyes
indigo
Prior art date
Application number
Other languages
German (de)
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Application granted granted Critical
Publication of AT66048B publication Critical patent/AT66048B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Herstellung von Indigofarbstoffen in fein verteilter Form. 



   In der Patentschrift Nr. 50509 wurde beschrieben, dass man beim Ausrübren z. B. von INdigoweissalkalilösungen bei Gegenwart von Formaldehyd einen   äusserst   fein verteilten kolloid- ähnlichen Indigo erhält. 



   Dies ist auch der Fall, wenn man von dem bekannten, fertiggebildeten FormaldehydIndigweiss ausgeht. 



   Beispiel :
100 Teile Formaldehyd-Indigweiss in Pastenform werden unter Zusatz von 30 Teilen 
 EMI1.1 
 sehr fein verteilte Indigo wird abgesaugt und mit Wasser gewaschen. Er gleicht in seinen Eigenschaften durchaus dem in der Patentschrift Nr. 65891 beschriebenen Produkt. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the production of indigo dyes in finely divided form.



   In the patent no. 50509 it was described that one z. B. from INdigoweissalkali solutions in the presence of formaldehyde an extremely finely divided colloid-like indigo is obtained.



   This is also the case if one starts from the known, fully formed formaldehyde indigweiss.



   Example:
100 parts of formaldehyde indig white in paste form are added with 30 parts
 EMI1.1
 very finely divided indigo is suctioned off and washed with water. Its properties are very similar to the product described in patent specification No. 65891.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Abänderung des Verfahrens nach Patent Nr. 50509 zur Herstellung von fein verteilten EMI1.2 EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Modification of the process according to patent no. 50509 for the production of finely divided EMI1.2 EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT66048D 1909-09-27 1911-08-21 Process for the production of indigo dyes in finely divided form. AT66048B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE50509X 1909-09-27
DE66048X 1911-02-04

Publications (1)

Publication Number Publication Date
AT66048B true AT66048B (en) 1914-08-10

Family

ID=25749139

Family Applications (1)

Application Number Title Priority Date Filing Date
AT66048D AT66048B (en) 1909-09-27 1911-08-21 Process for the production of indigo dyes in finely divided form.

Country Status (1)

Country Link
AT (1) AT66048B (en)

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