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Comparison of the kinetics and composition of ethoxylated methyl dodecanoate and ethoxylated dodecanol with narrow and broad distribution of homologs
Author(s) -
Hreczuch Wieslaw
Publication year - 1999
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-999-0079-2
Subject(s) - chemistry , product distribution , catalysis , kinetics , dodecanol , organic chemistry , physics , quantum mechanics
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.