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Direct Isomerization of Linoleic Acid to Conjugated Linoleic Acids (CLA) using Gold Catalysts

Bauer, Peter ; Horlacher, Peter ; Claus, Peter (2009)
Direct Isomerization of Linoleic Acid to Conjugated Linoleic Acids (CLA) using Gold Catalysts.
In: Chemical Engineering & Technology, 32 (12)
doi: 10.1002/ceat.200900384
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Supported gold catalysts, e.g., Au on Al₂O₃, Fe₂O₃, CeO₂, MnO₂, TiO₂, ZrO₂, activated carbon, titanium silicalite TS-1, were prepared and used for the isomerization of linoleic acid (cis-9,cis-12-octadecadienoic acid) to conjugated linoleic acids (CLA) in the presence of hydrogen at 165 °C in a batch reactor. The best results were obtained using a catalyst with 2 wt % Au on TS-1, which exhibits a high selectivity (78 %) towards CLA. The two biologically active target CLA isomers, i.e., cis-9,trans-11-CLA and trans-10,cis-12-CLA, were the main products. During the isomerization of linoleic acid to CLA, consecutive reactions also took place. These were the hydrogenation of linoleic acid and CLA to monounsaturated octadecenoic acids and the further hydrogenation of monounsaturated acids to stearic acid. Thus, gold catalysts are capable of isomerizing linoleic acid to CLA and hydrogenating their double bonds to an extent that depends on the Au catalyst used.

Typ des Eintrags: Artikel
Erschienen: 2009
Autor(en): Bauer, Peter ; Horlacher, Peter ; Claus, Peter
Art des Eintrags: Bibliographie
Titel: Direct Isomerization of Linoleic Acid to Conjugated Linoleic Acids (CLA) using Gold Catalysts
Sprache: Englisch
Publikationsjahr: Dezember 2009
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Chemical Engineering & Technology
Jahrgang/Volume einer Zeitschrift: 32
(Heft-)Nummer: 12
DOI: 10.1002/ceat.200900384
Kurzbeschreibung (Abstract):

Supported gold catalysts, e.g., Au on Al₂O₃, Fe₂O₃, CeO₂, MnO₂, TiO₂, ZrO₂, activated carbon, titanium silicalite TS-1, were prepared and used for the isomerization of linoleic acid (cis-9,cis-12-octadecadienoic acid) to conjugated linoleic acids (CLA) in the presence of hydrogen at 165 °C in a batch reactor. The best results were obtained using a catalyst with 2 wt % Au on TS-1, which exhibits a high selectivity (78 %) towards CLA. The two biologically active target CLA isomers, i.e., cis-9,trans-11-CLA and trans-10,cis-12-CLA, were the main products. During the isomerization of linoleic acid to CLA, consecutive reactions also took place. These were the hydrogenation of linoleic acid and CLA to monounsaturated octadecenoic acids and the further hydrogenation of monounsaturated acids to stearic acid. Thus, gold catalysts are capable of isomerizing linoleic acid to CLA and hydrogenating their double bonds to an extent that depends on the Au catalyst used.

Freie Schlagworte: Conjugated linoleic acid (CLA) • Fatty acids • Functional food • Gold catalysts • Hydrogenation • Isomerization
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Published Online: 16. Oktober 2009

Fachbereich(e)/-gebiet(e): 07 Fachbereich Chemie
07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Technische Chemie > Technische Chemie II
07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Technische Chemie
Hinterlegungsdatum: 17 Sep 2009 09:21
Letzte Änderung: 05 Mär 2013 09:23
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