![]() | Only 14 pages are availabe for public view |
Abstract SUMMARY The work done in this thesis, synthesis of nonionic and anionic surfaceactive agents (sulfated and sulfonated) obtained from non-edible Gawafa fat, were considered because of the remarkable properties and wide scope of uses of these compounds. This study has been represented in the following sections Section I: It includes the preparation of the fat samples by cold extraction with n-hexane. The extracted fat was subjected to chemical characterisation and fatty acids composition via G. L. C. The mixed fatty esters prepared were subjected to reduction with LiAlHt to the corresponding fatty alcohols. Nonionic surfactants from the mentioned compounds were prepared by propylene oxide (3,5 and 7 mole) adduct, in presence ofKOH as catalyst. Also, in this section, anionic surfactants, were prepared by reacting the individualfatty alcohols (decanol ClO, dodecanol C12,tetradecanol C14, hexadecanol C16, octadecanol CIS and 9-octadecenol) and / or fatty alcohols of Gawafa Fat, with chlorosulfonic acid followed by neutralization using NaOH to pH = 7; and / or addition of propylene oxide (n =1,2 and 3) followed by sulfation and neutralization with sodium hydroxide (2 N). The structure of the synthesized surfactants was confirmed by examination of their infrared and proton nuclear magnetic resonance spectra. Section II: Was concerned with the synthesis of sulfo-fatty esters from acrylic, methacrylic acids and fatty alcohols (decyl, dodecyl, tetradecyl, hexdecyl, octadecly, octadec9-enyl, and fatty alcohols of Gawafa Fat) followed by addition of NaHS03 forming bisulfite adducts where, the surface active properties showed that; these compounds gave high surface 104 properties as detergent with high Ca2+ stability. On other hand sulfo-fatty esters, were prepared by the reaction of fatty acids with allyl alcohol, followed by addition of sodium bisulfate forming anionic surface active agents. Section III: In this section mono- and diesters of itaconic acid or diester were prepared using the standard method of esterification followed by addition of sodium bisulfite where, the sulfo-mono fatty alkyl itaconic acid esters showed more surface properties than diesters. Micro-analytical data; IR and H1NMR spectra established the structures of the prepared compounds. The surface active properties were studied and it is clear that, some of these compounds showed high Ca++ stability hence they might be utilized in hard water and most of these compounds showed good biodegradability properties which manifested the importance of their application avoiding pollution problems. More improved properties, were obtained by introducing propylene oxide (3 mole) to sulfo-alkyl esters of acrylic and itaconic acids with fatty acids and/or fatty alcohols of Gawafa Fat. The physical and surface active properties of the prepared surfactants were evaluated as illustrated in (34 Tables) and (17 Figures) which revealed that:. the surface active properties in this study were quite satisfactory and it is hoped that, they will find uses in some industrial application. |