Effects of Mixed Anionic and Cationic Surfactants on Rate of Transesterification and Hydrolysis of Esters

✍ Scribed by Mohammad Niyaz Khan

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 81 KB
• Volume: 182
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0505

✦ Synopsis

NOTE Effects of Mixed Anionic and Cationic Surfactants on Rate of Transesterification and Hydrolysis of Esters appearance of the product, phenolate ion, at 290 nm. The observed data (absorbance, A obs , versus time, t) were found to obey pseudo-first-order The effects of mixed sodium dodecyl sulfate (SDS) and cetyltrirate law. The details of the kinetic procedure and data analysis are described methylammonium bromide (CTABr) surfactants on pseudo firstelsewhere (10). order rate constants ( k obs ) for methanolysis of ionized phenyl salic-It was shown in an earlier report (11) that the rates of hydrolysis of ylate (PS 0 ) and alkaline hydrolysis of phenyl benzoate (PB) reveal PS 0 and MS 0 (where MS 0 , ionized methyl salicylate, is the methanolysis the presence of micelle type aggregates or micelles, anionic in product of PS 0 ) are negligible compared to the rate of methanolysis of nature when X § 4 and cationic in nature when X £ 0.3, where PS 0 under the experimental conditions of the present study. This appears X Å [SDS]/[CTABr].