Patent ID: 8969517
Filing Date: 2015-03-03
Classification: C11B,Y02W

Abstract:
1. A method for processing plant raw materials from foliage of coniferous and deciduous tree species, said method comprising the steps of: extracting source material by organic solvent; subsequent isolation by settling, cooling and filtrating of waxes to obtain a solution of extractive compounds; separating free acids from the obtained solution of extractive compounds in hydrocarbon solvent using an alkali solution to obtain a neutralized solution; fractionating of the obtained neutralized solution into a solution of neutral compounds in hydrocarbon solvent and an aqueous-alkaline solution of salts of organic acids comprising higher fatty acids, resin acids and chlorophyllin acids; acidifying the aqueous-alkaline solution of salts by inorganic or organic acid; subsequent separation by settling of chlorophyllin acids and a fraction of higher fatty acids and resin acids comprising diterpene acids; selective esterifying the higher fatty acids present in the fraction of higher fatty acids and resin acids comprising diterpene acids, by treating the fraction of higher fatty acids and resin acids comprising diterpene acids with a low molecular weight alcohol with addition of sulphuric acid as a catalyst, wherein the higher fatty acids are esterified into esterified higher fatty acids and the diterpene acids are not esterified; and subsequent fractionating of the non-esterified diterpene acids from esters of the esterified higher fatty acids.