CH146265A - Process for the preparation of thymol - Google Patents

Process for the preparation of thymol

Info

Publication number
CH146265A
CH146265A CH146265D CH146265D CH146265A CH 146265 A CH146265 A CH 146265A CH 146265 D CH146265 D CH 146265D CH 146265 D CH146265 D CH 146265D CH 146265 A CH146265 A CH 146265A
Authority
CH
Switzerland
Prior art keywords
thymol
preparation
hydrogen
cresol
condensation product
Prior art date
Application number
CH146265D
Other languages
German (de)
Inventor
Hermann Dr. Wunderlich
Otto Prof. Dr. Bayer
Harald Dr. Gleinig
Original Assignee
Schering-Kahlbaum 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 Schering-Kahlbaum Ag filed Critical Schering-Kahlbaum Ag
Publication of CH146265A publication Critical patent/CH146265A/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/79—Polyolefins
    • D06P3/795—Polyolefins using metallisable or mordant dyes, dyeing premetallised fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/79—Polyolefins
    • D06P3/794—Polyolefins using dispersed dyes

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung von     Thymoi.       Es wurde gefunden,     dass    man aus dem  nach dem Verfahren des Patentes     Nr.   <B>1275922</B>       o#ewinnbaren    Kondensationsprodukt aus     m-          Kresol    und Aceton in guter Ausbeute     Thy-          mol    erhalten kann, wenn man es im Wasser  stoffstrom auf seine Zersetzungstemperatur  erhitzt und die mit dem Wasserstoff gemisch  ten Dämpfe über einen     Hydrierungskatalysa-          tor    leitet.

   Der     Ilydrierungskatalysator    ist  zweckmässig     auf    eine Trägersubstanz,     zual     Beispiel Bimsstein, niedergeschlagen. Bei dem  Zerfall des Kondensationsproduktes bildet  sich     Isopropylen-m-kresol,    das unter den ge  gebenen Bedingungen zu     -3-Methyl-6-iso-          propylplienol        (Thymol)    reduziert wird.  



  <I>Beispiel:</I>  Das nach dem Verfahren des Patentes       Nr.        127522    erhältliche     Kondensationspro.-          dukt    aus     m-Kresol    und     Acefon    wird unter  Durchleiten eines Wasserstoffstromes auf    etwa<B>300'</B> erhitzt und die vom     #Vasserstof        f     mitgeführten Dämpfe der     Zerfallprodukte     werden durch ein auf etwa 200' geheiztes  Rohr geleitet, das mit einem auf Bimsstein  niedergeschlagenen Nickelkatalysator be  schickt ist. Die das Rohr verlassenden  Dämpfe werden kondensiert und das     Thymol     durch Fraktionierung abgetrennt.



  Method for the preparation of thymoi. It has been found that thymol can be obtained in good yield from the condensation product of m-cresol and acetone which can be obtained by the process of patent no. 1275922, if it is added to its stream of hydrogen The decomposition temperature is heated and the vapors mixed with the hydrogen are passed over a hydrogenation catalyst.

   The Ilydration catalyst is expediently deposited on a carrier substance, for example pumice stone. When the condensation product decomposes, isopropylene-m-cresol is formed, which is reduced to -3-methyl-6-isopropylplienol (thymol) under the given conditions.



  <I> Example: </I> The condensation product obtained from m-cresol and acefone using the process of patent no. 127522 is heated to about <B> 300 '</B> while a stream of hydrogen is passed through it. Hydrogen entrained vapors of the decomposition products are passed through a pipe heated to about 200 ', which is sent with a nickel catalyst deposited on pumice stone. The vapors leaving the tube are condensed and the thymol is separated off by fractionation.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung von Thymol, dadurch gekennzeichnet, dass man das nach dem Verfahren des Patentes Nr. <B>1-27522</B> er- hältliche Kondensationsprodukt ins in-Kre- sol und Aceton im Wasserstoffstrom auf seine Zersetzungstemperatur erhitzt und die vom Wasserstoff mitgeführten Dämpfe iiber einen Hydrierungskatalysator leitet. <B> PATENT CLAIM: </B> Process for the preparation of thymol, characterized in that the condensation product obtainable by the process of patent no. 1-27522 is converted into in-cresol and acetone heated to its decomposition temperature in a hydrogen stream and the vapors carried along by the hydrogen passed over a hydrogenation catalyst.
CH146265D 1928-12-31 1929-12-10 Process for the preparation of thymol CH146265A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE146265X 1928-12-31

Publications (1)

Publication Number Publication Date
CH146265A true CH146265A (en) 1931-06-16

Family

ID=5671245

Family Applications (1)

Application Number Title Priority Date Filing Date
CH146265D CH146265A (en) 1928-12-31 1929-12-10 Process for the preparation of thymol

Country Status (1)

Country Link
CH (1) CH146265A (en)

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