Process for Concentrating a Mixture Containing Organic Hydroperoxide

摘要

Method for concentrating an organic hydroperoxide mixture comprising a hydrocarbon and a hydroperoxide corresponding thereto comprises evaporating a first liquid mixture in a thin-film evaporation device followed by separation in a separation zone. Both the evaporation device and the separation zone operate at a low absolute pressure at a temperature lower than the thermal degradation temperature of the hydroperoxide to prevent thermal decomposition thereof. The process is particularly useful for concentrating an oxidation product made from the oxidation of cyclohexylbenzene.

主权项

1. A process for making a cyclohexylbenzene hydroperoxide product, the process comprising:
(I) providing a first liquid mixture comprising cyclohexylbenzene and cyclohexylbenzene hydroperoxide; (II) forming a second vapor/liquid mixture stream and a second liquid stream by passing the first liquid mixture through a first thin-film evaporation device under a first absolute pressure of at most 80 kPa; (III) separating the second vapor/liquid mixture stream in a first separation zone under a second absolute pressure of at most 80 kPa to obtain a third liquid stream and a third vapor stream; (IV) condensing a part of the third vapor stream to obtain a fourth liquid stream and a fourth vapor stream; (V) recycling at least a part of the fourth liquid stream to the first thin-film evaporation device; and (VI) obtaining the cyclohexylbenzene hydroperoxide product from the third liquid stream and/or the second liquid stream, wherein the cyclohexylbenzene hydroperoxide product has a higher concentration of cyclohexylbenzene hydroperoxide compared to the first liquid mixture.