Oxidation of ethoxylated fatty alcohols to alkylpolyglycol carboxylic acids using noble metals as catalysts
DOI:
https://doi.org/10.3989/gya.010309Keywords:
Alkylpolyglycol carboxylic acid, Ethoxy carboxylic acid, Fatty alcohol ethoxylate, Noble-metal catalyst Oxidation, Noble-metal catalyst DehydrogenationAbstract
The conversion of ethoxylated fatty alcohols to the corresponding carboxylic acids through dehydrogenation/ oxidation using noble-metal catalysts has been studied. Ethoxylated primary aliphatic alcohols, ethoxylated random secondary aliphatic alcohols and ethoxylated alkylphenols have been converted to the corresponding acids in the presence of a base. The noble metal catalysts Palladium and Platinum were used without significant degradation of the ethoxyl chain in yields that exceeded 90%. On the other hand, the catalysts Rhodium and Ruthenium gave yields of about 80% and 60% respectively.
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