Comparison of the kinetics and composition of ethoxylated methyl dodecanoate and ethoxylated dodecanol with narrow and broad distribution of homologs

Broad‐ and narrow‐range dodecanol ethoxylates were obtained with sodium hydroxide and a proprietary calcium‐based catalyst, respectively. The proprietary catalyst was also used for direct ethoxylation of methyl dodecanoate ester. Natta‐Mantica distribution coefficients were calculated from the fract...

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Bibliographic Details
Published in:Journal of surfactants and detergents 1999-07, Vol.2 (3), p.287-292
Main Author: Hreczuch, Wieslaw
Format: Article
Language:English
Subjects:
Alcohols and methyl ester ethoxylates
homolog distribution
Natta‐Mantica coefficient
Sodium hydroxide
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Summary:Broad‐ and narrow‐range dodecanol ethoxylates were obtained with sodium hydroxide and a proprietary calcium‐based catalyst, respectively. The proprietary catalyst was also used for direct ethoxylation of methyl dodecanoate ester. Natta‐Mantica distribution coefficients were calculated from the fractional content of the reaction products. A specific sequence of the distribution coefficients was observed in each case. A superior activation of the second addition step in ethoxylation of the methyl dodecanoate ester was noted. The kinetic pattern of the reaction resulted in a product distribution specifically related to the average degree of oxyethylation degree.
ISSN:1097-3958
1558-9293
DOI:10.1007/s11743-999-0079-2