| 摘要 |
<p>The invention relates to a process for the catalytic epoxidation of olefins by reaction with hydrogen peroxide according to the double phase technique with ?onium? salts, characterized in that the reaction is conducted in an aqueousorganic liquid two-phase system, consisting of; (a) an organic phase substantially containing the olefin having the formula: wherein R1 R2, R3 and R4, which may be substituted with functional groups inert to the reaction conditions, represent hydrogen atoms or hydrocarbyl groups selected from alkyls and alkenyls having up to 30 carbon atoms; cycioalkyls and cycloalkenyls having branched; aryls, alkyl-aryls and alkenyl-aryls hav.ing from 6 to 12 carbon atoms; or wherein an R1, R2, R3, R4 group taken together with an adjacent group represents alkyl or alkenyl groups having up to 12 carbon atoms in the resulting cycle; and (b) an aqueous acidic phase substantially containing the hydrogen peroxide, in the presence of a catalytic system consisting of two components, the first being at least one compound selected from W, Mo in the metal state, tungstic, molybdic acids and the corresponding neutral alkaline salts, the metal-car-bonyls W(CO)6-and Mo(CO)6; the oxides MoO2, Mo2O5, Mo2O3, MoO3, W2, W2O5, WO ; sulphides WS2 and WS3; oxychlorides and chlorides of tungsten and molybdenum, and the second being at least one derivative selected from phosphoric, polyphosphoric, pyrophosphoric, arsenic acids and their alkaline salts, the oxides P2O5 and As2O5 and chlorides and oxychlorides PC15, AsCl5, POCl3 and AsOCl3</p> |
