Non-allergenic lanolin and production of same
AssigneeDai-Ichi Croda Chemicals Kabushiki Kaisha
InventorsTakeshi Koresawa, Eiji Yoden
Life of this patent
Estimating the term…
Abstract
Woolgrease or lanolin is fractionated into non-polar lanolin wax and polar lanolin wax by passing a solution of woolgrease or lanolin in a non-polar solvent through a column of an adsorption medium and evaporating the passed solution to recover the non-polar lanolin wax. The non-polar lanolin wax exhibits non-allergenic properties.
Claims8
A method for producing non-allergenic lanolin wax which comprises passing a solution of woolgrease or lanolin dissolved in a non-polar solvent selected from the group consisting of aliphatic and aromatic hydrocarbons, chlorinated hydrocarbons and mixtures thereof through a column of an adsorption medium for free fatty alcohols, eluting the column with said non-polar solvent, and evaporating the passed solution and the eluate.
A method for fractionating woolgrease or lanolin which comprises passing a solution of woolgrease or lanolin dissolved in a non-polar solvent selected from the group consisting of aliphatic and aromatic hydrocarbons, chlorinated hydrocarbons and mixtures thereof through a column of an adsorption medium for free fatty alcohols, eluting the column with said non-polar solvent and a polar solvent selected from the group consisting of an alkanol, an ester thereof and mixtures thereof successively, collecting said non-polar solvent fraction and said polar solvent fraction separately and evaporating said fractions to remove the respective solvents therefrom.
Dependencies are inferred from the claim text.