AT244926B - Process for the preparation of surface-active non-cyclic xylitol esters of fatty acids - Google Patents

Process for the preparation of surface-active non-cyclic xylitol esters of fatty acids

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Publication number
AT244926B
AT244926B AT1006762A AT1006762A AT244926B AT 244926 B AT244926 B AT 244926B AT 1006762 A AT1006762 A AT 1006762A AT 1006762 A AT1006762 A AT 1006762A AT 244926 B AT244926 B AT 244926B
Authority
AT
Austria
Prior art keywords
sep
cyclic
preparation
fatty acids
active non
Prior art date
Application number
AT1006762A
Other languages
German (de)
Original Assignee
Ledoga Spa
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 Ledoga Spa filed Critical Ledoga Spa
Priority to AT1006762A priority Critical patent/AT244926B/en
Application granted granted Critical
Publication of AT244926B publication Critical patent/AT244926B/en

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

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Herstellung oberflächenaktiver nichtcyclischer
Xylitester von Fettsäuren 
 EMI1.1 
 

 <Desc/Clms Page number 2> 

 Dichloräthan kristallisiert. Es wurden 540 g eines Produktes mit folgenden Eigenschaften erhalten : 
 EMI2.1 
 
<tb> 
<tb> Verseifungszahl <SEP> 152,1
<tb> Hydroxylzahl <SEP> 456,2
<tb> Palmitinsäure <SEP> 1, <SEP> 560/0 <SEP> 
<tb> Methylpalmitat <SEP> 1, <SEP> 25%
<tb> Feuchtigkeit <SEP> 0, <SEP> 18%
<tb> Monoester <SEP> 63%
<tb> Diester <SEP> 37%
<tb> 
 
 EMI2.2 
 wurde   der Rückstand inHexan   gelöst. Die Lösung wurde zur Entfernung des überschüssigen Xylits mit Wasser gewaschen und zur Trockene eingedampft. Der Rückstand wurde aus Äthylacetat oder Dichloräthan kristallisiert.

   Es wurden 300 g eines Produktes mit folgenden Eigenschaften erhalten : 
 EMI2.3 
 
<tb> 
<tb> Verseifungszahl <SEP> 154,3
<tb> Hydroxylzahl <SEP> 457, <SEP> 1
<tb> Palmitinsäure <SEP> l, <SEP> 42% <SEP> 
<tb> Methylpalmität <SEP> 1, <SEP> 31%
<tb> Feuchtigkeit <SEP> 0, <SEP> 27%
<tb> Monoester <SEP> 63, <SEP> 05% <SEP> 
<tb> Diester <SEP> 36, <SEP> 5%.
<tb> 
 



    PATENTANSPRÜCHE :    
1. Verfahren zur Herstellung oberflächenaktiver,   nichtcyclischer Xylitester   von Fettsäuren, die 6 bis 30 Kohlenstoffatome enthalten, dadurch gekennzeichnet, dass ein niedrigerer Alkylester einer Fettsäure mit 6 - 30 Kohlenstoffatomen mit wenigstens drei Molen Xylit pro Mol des erwähnten Alkylesters in Gegenwart eines alkalischen Katalysators und in Dimethylformamid oder Dimethylsulfoxyd als Lösungsmittels umgesetzt wird, indem unter Stickstoffatmosphäre bei einem Druck von 250 bis 300 mm Hg 12 - 24 h auf 90-100 C erhitzt wird, worauf die erhaltene Reaktionsmasse mit Hexan behandelt, der nicht umgesetzte Xylit abfiltriert, das Lösungsmittel abdestilliert und der Rückstand aus einem Lösungsmittel umkristallisiert wird.



   <Desc / Clms Page number 1>
 



  Process for the preparation of surface-active non-cyclic
Xylitol esters of fatty acids
 EMI1.1
 

 <Desc / Clms Page number 2>

 Dichloroethane crystallizes. 540 g of a product with the following properties were obtained:
 EMI2.1
 
<tb>
<tb> Saponification number <SEP> 152.1
<tb> hydroxyl number <SEP> 456.2
<tb> Palmitic acid <SEP> 1, <SEP> 560/0 <SEP>
<tb> methyl palmitate <SEP> 1, <SEP> 25%
<tb> humidity <SEP> 0, <SEP> 18%
<tb> monoester <SEP> 63%
<tb> Diester <SEP> 37%
<tb>
 
 EMI2.2
 the residue was dissolved in hexane. The solution was washed with water to remove the excess xylitol and evaporated to dryness. The residue was crystallized from ethyl acetate or dichloroethane.

   300 g of a product with the following properties were obtained:
 EMI2.3
 
<tb>
<tb> Saponification number <SEP> 154.3
<tb> hydroxyl number <SEP> 457, <SEP> 1
<tb> Palmitic acid <SEP> l, <SEP> 42% <SEP>
<tb> methyl palmity <SEP> 1, <SEP> 31%
<tb> humidity <SEP> 0, <SEP> 27%
<tb> Monoester <SEP> 63, <SEP> 05% <SEP>
<tb> Diester <SEP> 36, <SEP> 5%.
<tb>
 



    PATENT CLAIMS:
1. A process for the preparation of surface-active, non-cyclic xylitol esters of fatty acids containing 6 to 30 carbon atoms, characterized in that a lower alkyl ester of a fatty acid having 6 - 30 carbon atoms with at least three moles of xylitol per mole of said alkyl ester in the presence of an alkaline catalyst and in Dimethylformamide or dimethyl sulfoxide is reacted as a solvent by heating to 90-100 C for 12-24 hours under a nitrogen atmosphere at a pressure of 250 to 300 mm Hg, after which the reaction mass obtained is treated with hexane, the unreacted xylitol is filtered off, the solvent is distilled off and the residue is recrystallized from a solvent.

Claims (1)

2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als alkalischer Katalysator Natriumcarbonat verwendet wird. 2. The method according to claim 1, characterized in that sodium carbonate is used as the alkaline catalyst. 3. Verfahren nach Anspruch 1 oder 2, d gekennzeichnet, dass das erhaltene Rohpro- Cukt aus Dichloräthan umkristallisiert wird. 3. The method according to claim 1 or 2, d characterized in that the crude product obtained is recrystallized from dichloroethane. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als niedrigerer Fettsäurealkyl- ester Methylpalmitat verwende. wird. EMI2.4 4. The method according to claim 1, characterized in that methyl palmitate is used as the lower fatty acid alkyl ester. becomes. EMI2.4
AT1006762A 1962-12-24 1962-12-24 Process for the preparation of surface-active non-cyclic xylitol esters of fatty acids AT244926B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT1006762A AT244926B (en) 1962-12-24 1962-12-24 Process for the preparation of surface-active non-cyclic xylitol esters of fatty acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1006762A AT244926B (en) 1962-12-24 1962-12-24 Process for the preparation of surface-active non-cyclic xylitol esters of fatty acids

Publications (1)

Publication Number Publication Date
AT244926B true AT244926B (en) 1966-02-10

Family

ID=3619615

Family Applications (1)

Application Number Title Priority Date Filing Date
AT1006762A AT244926B (en) 1962-12-24 1962-12-24 Process for the preparation of surface-active non-cyclic xylitol esters of fatty acids

Country Status (1)

Country Link
AT (1) AT244926B (en)

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