Westvaco Corporation

Julian E Parker, Iii

John A Alford

Philip L Robinson

Thomas J Cuff

Sterols from the solvent-extracted or distilled neutrals of saponified tall oil pitch are disclosed to be isolated and purified by a process of a liquid-liquid extraction where the hydrocarbon extraction stream is washed with an aqueous methanol solution to remove methanol-soluble impurities by adding the methanol and water, sequentially or as a blend. The resulting hydrocarbon/neutrals/methanol/water solution separates into an upper organic phase and a lower methanol/water phase, which lower phase is removed. The remaining organic phase is allowed to cool to from about 20-30.degree. C., with agitation, to facilitate crystallization of sterols, which crystals are recovered by filtering.

Isolation and purification of sterols from neutrals fraction of tall oil

The invention relates to polymerizable emulsifiers, methods of preparing the emulsifiers, and latex compositions comprising the emulsifiers. In particular, the invention relates to maleic anhydride propylene sulfonate adducts of rosin and/or fatty acid which can be substituted for the surfactants or emulsifiers traditionally employed in the preparation of butadiene derived latexes.

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Charleston, SC, United States of America

Julian E Parker, Iii