| 简介 |
FIELD : organic chemistry, chemical technology.
SUBSTANCE : invention proposes a method for synthesis of oxirane compounds comprising the following steps : (i) oxidation of alkylaryl wherein alkyl substitute comprises from 2 to 10 carbon atoms to yield alkylaryl hydroperoxide; (ii) contacting at least part of alkylaryl hydroperoxide prepared at the step (i) with olefin at the temperature range 0-200°C and under pressure in the range 1-100 x 105 H/m2 in the presence of a catalyst comprising titanium on silicon dioxide and/or silicate to yield oxirane compound and alkylaryl hydroxyl; (iii) optional interaction of at least part of alkylaryl hydroperoxide prepared at the step (i) to yield phenol and ketone; (iv) separation of oxirane compound from the reaction product from the step (ii0, and (v) contacting at least part of the reaction product no containing oxirane with hydrogen at temperature 100-330°C and under pressure 0.1-50 x 105 H/m2 in the presence of the hydrogenation catalyst to yield alkylaryl and at least part of the latter is re-circulated to the step (i) wherein the hydrogenation catalyst represents catalyst comprising copper compound, zinc compound and at least one compound chosen from the group consisting of aluminum, zirconium, magnesium rare-earth metals and their mixtures. Invention provides the possibility for synthesis of oxirane compounds without necessity for simultaneous synthesis of other compounds.
EFFECT : improved method of synthesis.
5 cl, 7 ex |
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