how is phenol prepared from benzene symphonic acid
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You can prepare phenols in large quantities by the pyrolysis of the sodium salt of benzene sulfonic acid, by the Dow process, and by the air oxidation of cumene. ... You can also prepare small amounts of phenol by the peroxide oxidation of phenylboronic acid and the hydrolysis of diazonium salts.
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Benzene sulphonic acid is initially treated with an aqueous solution of NaOH. It is then mixed with solid NaOH and fused at high temperature. The resulting product is then acidified to yield phenol. The entire process has been schematically shown above.
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