Refining of tall oil pitch

• DOI: 10.1007/bf02674150
• Publication Date: 2007-07-17T07:39:01Z
• Authors: V. Erä; K. Noronen; B. Holmbom
• Keywords: Unsaponifiable; Hexane; Fraction (chemistry); Refining (metallurgy)

Abstract Six grades of tall oil pitch (TOP) were subjected to extraction by n‐hexane and subsequent adsorption SiO 2 ‐activated carbon blend. Treated samples contained 32.9–48.4% free acids, 24.2–35.0% esterified 25.0–36% unsaponifiable neutral compounds. Each the above fractions was analyzed high resolution gas chromatography. The portion insoluble in 83.9% 10.6% 5.5% compounds, indicating enrichment acidic compounds this fraction. decolorizing effect observed all treated TOP grades.