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Abstract

The present disclosure relates to a method of preparing propylene oxide comprising the steps:

(a) oxidizing alpha-methylbenzyl alcohol with air to form a first reaction mixture comprising hydrogen peroxide and acetophenone;(b) reacting propylene with the first reaction mixture in the presence of a catalyst to form a second reaction mixture comprising propylene oxide;(c) separating the propylene oxide from the second reaction mixture to form a third reaction mixture;(d) heating the third reaction mixture to decompose hydrogen peroxide, whereby a fourth reaction mixture is formed;(e) hydrogenating the acetophenone in the fourth reaction mixture with hydrogen to form a fifth reaction mixture comprising alpha-methylbenzyl alcohol; and(f) separating alpha-methylbenzyl alcohol from the fifth reaction mixture and returning the methyl benzyl alcohol to step (a).

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First Claim