Method for refining of soaps using solvent extraction
OwnerBjarne Holmbom, Eero Avelainventors
Life of this patent
Estimating the term…
Abstract
A method for refining of soaps, in which method the unsaponifiable neutral substances included in the soap are separated by means of extraction from an aqueous solution containing low molecular weight ketones by water immiscible organic solvents, whereby an organic phase is obtained that contains unsaponifiable neutral substances, and a water phase that contains mainly salts of fatty acids and rosin acids, which phases are separated and processed in a way in itself known, whereby neutral substances and, correspondingly, a crude oil with a high content of free fatty and other acids and, consequently with a high acid number, are obtained.
Claims9
In a method for refining of soaps of the type of crude sulphate soap and soap obtained during alkali treatment of wood extractives, products of tall oil or products of vegetable oils, in which unsaponifiable neutral substances included in the soap are separated by means of extraction with organic solvents;
- the improvement comprising dissolving the soap in a mixture of acetone and water to form a soap solution and extracting unsaponifiable substances from said solution with water-immiscible solvent thereby to form an organic phase containing unsaponifiable neutral substances and a water phase containing salts of fatty and resin acids, separating said phases, removing from said organic phase said neutral substances, and removing from said water phase an oil with a high content of free fatty and/or resin acids.
Dependencies are inferred from the claim text.