Catalytic production of tert-amylphenols.

摘要

A phenol is reacted with 2-methyl-1-butene and/or 2-methyl-2-butene (isoamylenes) in the presence of an inorganic solid catalyst (e.g. silica-alumina or activated clay) or an acidic sulfonic-acid type ion exchange resin as catalyst, usually at 30 to 120 DEG C at a pressure of 1 to 10 kg/cm<2> for from 1 to 7 h, batchwise; the catalyst is removed, and the unreacted isoamylene removed and the concentrate is distilled and purified to yield a corresponding 2,4-di-tert- or para-tert-amylphenol in high purity and good yield.
Optionally a diluting hydrocarbon is used, e.g. obtained by hydrogenating an isoprene-extracted C5 fraction in the presence of a metallic (P; Ni) hydrogenation catalyst.