alexa alpha-Terpineol from hydration of crude sulfate turpentine oil.
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): Pakdel H, Sarron S, Roy C

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Abstract Hydration of alpha-pinene under various conditions was studied and compared with the literature. Optimal reaction conditions have been established for the hydration of alpha-pinene and crude turpentine oil in the absence of catalyst and using a low volume of acetone. A detailed reaction product analysis is reported. The main hydration product, alpha-terpineol, was obtained at a yield of 67 wt \% of the initial alpha-pinene by reacting with 15\% aqueous sulfuric acid and an excess of acetone in an oil bath heated to 80-85 degrees C over the course of 4 h. A progressive transformation of alpha-terpineol to 4-(2-hydroxypropyl)-1-methylcyclohexanol (1,8-terpine) takes place as the hydration time exceeds 4 h. A crude turpentine oil sample was also hydrated under conditions similar to those of alpha-pinene. The alpha-terpineol yield was 77 wt \% of the initial alpha-pinene in the crude turpentine oil. The chemical analysis of the crude turpentine oil before and after hydration was carried out, and the distribution of the products was discussed.
This article was published in J Agric Food Chem and referenced in Journal of Chromatography & Separation Techniques

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