Process for preparing p-cumylphenol
AssigneeMitsubishi Petrochemical Co., Ltd.
InventorsMakoto Imanari, Hiroshi Iwane, Takahiro Sugawara, Satoshi Ohtaka, Masashi Inaba, Mitsugi Kataoka
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Abstract
A process for preparing p-cumylphenol which comprises reacting phenol and .alpha.-methylstyrene in the presence of an inorganic solid acid catalyst having an acid point of an acid strength Ho of up to -3, for example, activated clay and recovering the aimed p-cumylphenol from the reaction mixture thus obtained by distilling the same while introducing an inert gas such as nitrogen and/or steam into the distillation system is disclosed. The p-cumylphenol thus obtained has a high purity and an improved color compared with those obtained by conventional methods.
Claims7
A process for preparing p-cumylphenol which comprises reacting phenol and .alpha.-methylstyrene in the presence of an inorganic solid acid catalyst, at a temperature of 30.degree. to 200.degree. C., and isolating said p-cumylphenol from the reaction mixture thus obtained by distilling said p-cumylphenol while introducing an inert gas into the distillation system, wherein said distillation system includes a reboiler, a still, a column, a reflux condenser, and a reflux drum, and wherein the column-bottom temperature at the isolation of said p-cumylphenol is maintained at a temperature of from 180.degree. to 300.degree. C.
Dependencies are inferred from the claim text.