Process for the removal of hydroxyacetone from phenol

Details Process for the removal of hydroxyacetone from phenol Process for the removal of hydroxyacetone from phenol

1979-02-23

1981-02-17

Sever, Frank

Distillation: processes, separatory

With measuring, testing or inspecting

Of temperature or pressure

203 3, 568754, B01D 342

Patent

active

042513251

ABSTRACT:
Phenol containing less than 30 ppm hydroxyacetone is produced by feeding hydroxyacetone-contaminated phenol obtained by the decomposition of cumene hydroperoxide, which phenol is substantially free from cleavage catalyst and light ends such as acetone and water, and up to 22% by weight of cumene and/or alpha-methyl styrene to an intermediate point in a distillation column from which there is removed overhead a fraction containing cumene and/or alpha-methyl styrene and a substantial proportion of the hydroxyacetone in the feed and there is removed from the base a fraction comprising phenol containing less than 30 ppm hydroxyacetone, whilst maintaining the column under such conditions of temperature and pressure that cumene and/or alpha-methyl styrene forms from 55 to 80% by weight of the composition on the uppermost 15 to 70% of the trays in the stripping section and phenol forms greater than 50% by weight of the composition on the bottommost 10 to 50% of the trays in the stripping section.

REFERENCES:
patent: 3672961 (1972-06-01), Nixon
patent: 3896006 (1975-07-01), Cooke

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