Polyethoxylate ester, fatty acid

Dispersants are being increasingly used to combat oil spills in the marine environment. The new generation of dispersants are commonly fatty acid-polyethoxylate esters (25) and are relatively non toxic. The specific compounds in petroleum responsible for MFO induction in fish have not been defined. Dispersed oil could increase the availability of inducing components, either the particulates or solubles, but alternatively, soluble compounds may be rapidly lost from dispersed oil (26). Preliminary experiments have been carried out to assess the effectiveness of dispersed oil in AHH induction. Venezuelan crude and bunker (distillation cut above 300-400°C).and two polyethoxylate oil spill dispersants,... 

An industrial blend of polyethoxylated fatty acid esters was examined by APCI-FIA-MS(+) and -LC-MS(+). The screening approach by FIA-MS confirmed that the industrial blend contained small amounts of impurities from synthesis as recognisable from Fig. 2.9.25. 

An early indication that a widely used agricultural chemical might be metabolized to a nonpolar conjugate in plants came from an in vitro enzyme study with C-labeled surfactants of the Triton family. A crude particulate enzyme preparation from com shoots catalyzed the formation of fatty acid ester conjugates from the two 1"c-labeled polyethoxylated surfactants indicated below (Equation 32). The ester conjugates were formed primarily from palmitic and linoleic acids 0851). They were identified by mass spectrometry and by GLC analysis of hydrolysis products (J48). In vljro, rice and... 

Fatty acids. Fatty acids can be ethoxylated in what amounts to a two-step process where the first mole of EO adds slowly to the dry, precatalyzed acid to yield the hydroxyethyl ester. Because of the presence of carboxylic acid, the reaction runs slowly under general acid catalysis and does not produce substantial quantities of polyethoxylated product. Once the free carboxylic acids are completely capped, the pH of the system becomes alkaline and the reaction proceeds in a comparable manner to any primary alcohol ethoxylation. Some competing transesterification occurs at temperatures above 120°C, leading to a product distribution of PEG monoesters, diesters, and free PEG. 

Chem. Descrip. proprietary blend of heavy range paraffin base petroleum oil, polyol fatty acid esters and polyethoxylated derivatives Ionic Nature Nonionic CAS 64741-88-4 64741-89-5... 

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