Biorefining of crude tall oil
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United States of America Patent
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Nov 22, 2016
Grant Date -
Oct 29, 2015
app pub date -
Dec 21, 2012
filing date -
Dec 21, 2012
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Abstract
A process for pre-treatment of a crude tall oil (CTO) for removal of impurities is disclosed. The process comprises a first pre-treatment step involving a CTO wash and a separation of a first oil phase comprising refined CTO and an aqueous phase holding impurities, and a second step involving a separation of a second oil phase from the aqueous phase. A process for refining of crude tall oil (CTO) is also disclosed. The process comprises fractionation under vacuum of a refined CTO into at least one stream of refined tall diesel (RTD) or tall oil fatty acids (TOFA) and at least one stream of resin acid(s) (RA). The stream of RTD or TOFA is deoxygenated forming hydrocarbon compounds in a subsequent step. This invention also relates to a refined tall diesel. Furthermore, a process for the production of a refined tall diesel (RTD) composition, wherein crude sulphate turpentine(s) (CST) is added to the refined tall diesel (RTD) composition, is described.
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