CH174345A - Process for the production of a condensation product. - Google Patents

Process for the production of a condensation product.

Info

Publication number
CH174345A
CH174345A CH174345DA CH174345A CH 174345 A CH174345 A CH 174345A CH 174345D A CH174345D A CH 174345DA CH 174345 A CH174345 A CH 174345A
Authority
CH
Switzerland
Prior art keywords
production
condensation product
sulfuric acid
yellow
pyrene
Prior art date
Application number
Other languages
German (de)
Inventor
Scholl Roland Dr Prof
Meyer Kurt Ing Dr
Original Assignee
Scholl Roland Dr Prof
Meyer Kurt Ing Dr
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 Scholl Roland Dr Prof, Meyer Kurt Ing Dr filed Critical Scholl Roland Dr Prof
Publication of CH174345A publication Critical patent/CH174345A/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
    • C09B57/00—Other synthetic dyes of known constitution
    • C09B57/001—Pyrene dyes

Landscapes

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

Description

  

      'Verfahren        zur    Herstellung     eines    Kondensationsproduktes.    Es wurde gefunden, dass man ein neues  Kondensationsprodukt erhält, wenn man in  Gegenwart von Schwefelsäure     Akrolein    auf       Pyren    einwirken lässt. Statt     Akrolein    ist es  zweckmässig, Verbindungen zu verwenden,  die, wie     Glycel-in,    unter den Kondensations  bedingungen in     Akrolein    übergehen können.  



  Die neue Verbindung, die zur Herstellung  von     Farbstoffen    verwendet werden soll, kri  stallisiert in braungelben Nadeln, sublimiert       unzersetzt    und schmilzt nach vorherigem  Dunkeln bei etwa 2430. Sie löst sich leicht  in konzentrierter Schwefelsäure gelbrot mit  roter Fluoreszenz.  



  <I>Beispiel:</I>  25 Teile     Pyren    werden mit 750 Teilen  Schwefelsäure von 62       B6    und 50 Teilen       Glycerin    auf<B>1000</B> ei-wärmt, bis alles     Pyren     verschwunden ist. Die grüne Lösung wird    dann in Wasser eingetragen, der Nieder  schlag mit verdünnter Natronlauge ausge  kocht und das gelbe Rohprodukt durch     LTm-          kristallisieren,    zum Beispiel aus Eisessig,  gereinigt.



      Process for the production of a condensation product. It has been found that a new condensation product is obtained if acrolein is allowed to act on pyrene in the presence of sulfuric acid. Instead of acrolein, it is advisable to use compounds which, like glycel-in, can transform into acrolein under the condensation conditions.



  The new compound, which is to be used for the production of dyes, crystallizes in brown-yellow needles, sublimes undecomposed and melts after prior darkening at about 2430. It dissolves easily in concentrated sulfuric acid yellow-red with red fluorescence.



  <I> Example: </I> 25 parts of pyrene are egg-heated with 750 parts of sulfuric acid from 62 B6 and 50 parts of glycerine to <B> 1000 </B> until all of the pyrene has disappeared. The green solution is then introduced into water, the precipitate is boiled out with dilute sodium hydroxide solution and the yellow crude product is purified by crystallization, for example from glacial acetic acid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Konden sationsproduktes, dadurch gekennzeichnet, dass man in Gegenwart von Schwefelsäure Akrolein auf Pyren einwirken lässt. Die neue Verbindung, die zur Herstellung von Farbstoffen verwendet werden soll, kri stallisiert in braungelben Nadeln, sublimiert unzersetzt und schmilzt nach vorherigem Dunkeln bei etwa 243 . Sie löst sich leicht in konzentrierter Schwefelsäure gelbrot mit roter Fluoreszenz. PATENT CLAIM: Process for the production of a condensation product, characterized in that acrolein is allowed to act on pyrene in the presence of sulfuric acid. The new compound, which is to be used for the production of dyes, crystallizes in brown-yellow needles, sublimates without decomposition and melts at around 243 after being darkened beforehand. It dissolves easily in concentrated sulfuric acid yellow-red with red fluorescence.
CH174345D 1933-10-28 1933-10-28 Process for the production of a condensation product. CH174345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH174345T 1933-10-28

Publications (1)

Publication Number Publication Date
CH174345A true CH174345A (en) 1935-01-15

Family

ID=4425388

Family Applications (1)

Application Number Title Priority Date Filing Date
CH174345D CH174345A (en) 1933-10-28 1933-10-28 Process for the production of a condensation product.

Country Status (1)

Country Link
CH (1) CH174345A (en)

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