| 摘要 |
PROBLEM TO BE SOLVED: To produce the subject purified phenol with economical advantage by feeding crude phenol to the first distillation column and recovering the cumene-containing volatile fraction from the top of the column head and the α-methylstyrene-containing heavy fraction from the column bottom. SOLUTION: Crude phenol that is obtained from the cumene process for producing phenol and includes acetone, water, hydroxyacetone, cumene, α- methylstyrene and phenol (preferably obtained from the acid catalytic decomposition step of cumene hydroperoxide) is fed to the first distillation column, the light fraction including cumene is recovered from the column top and the heavy fraction containing α-methylstyrene from the column bottom. In a preferred embodiment, the light fraction containing cumene recovered from the column top is fed to the second distillation column to effect the reactive distillation and acetone as a product is obtained by the side cut of the second distillation column. |
