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Refining of tall oil pitch
Author(s) -
Erä V.,
Noronen K.,
Holmbom B.
Publication year - 1979
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02674150
Subject(s) - unsaponifiable , chemistry , hexane , chromatography , fraction (chemistry) , adsorption , extraction (chemistry) , refining (metallurgy) , sterol , composition (language) , organic chemistry , cholesterol , biochemistry , linguistics , philosophy
Six grades of tall oil pitch (TOP) were subjected to extraction by n‐hexane and subsequent adsorption by SiO 2 ‐activated carbon blend. Treated pitch samples contained 32.9–48.4% free acids, 24.2–35.0% esterified acids, and 25.0–36% unsaponifiable neutral compounds. Each of the above fractions was analyzed by high resolution gas chromatography. The portion insoluble in n‐hexane contained 83.9% free acids, 10.6% esterified acids, and 5.5% unsaponifiable neutral compounds, indicating enrichment of the acidic compounds in this fraction. The decolorizing effect was observed in all treated TOP grades.