Process for preparing an organic hydroperoxide, industrial set-up therefore and process wherein such organic hydroperoxide is used in the preparation of an alkylene oxide

1. A process for preparing an organic hydroperoxide, which process comprises:

(a) oxidizing an organic compound to obtain an organic reaction product containing organic hydroperoxide;

(b) mixing at least part of the organic reaction product of step (a) with a basic aqueous solution to obtain a mixture of basic aqueous solution and the organic reaction product;

(c) separating the mixture of step (b) to obtain a separated organic phase containing organic hydroperoxide, and a separated aqueous phase;

(d) mixing at least part of the separated organic phase of step (c) with water to obtain a mixture of an aqueous phase and the organic phase; and

(e) separating the mixture of step (d) to obtain a separated organic phase containing organic hydroperoxide, and a separated aqueous phase;

in which process the separation to a separated organic phase and a separated aqueous phase in step (e) is carried out with the help of a coalescer containing glass fibers.

2. A process according to claim 1 wherein the sequence of steps (d) and (e) is repeated one or more times.

3. A process according to claim 1 , wherein the volume ratio of aqueous phase to organic phase in step (d) lies in the range from 1:100 to 1:2.

4. A process according to claim 1 , wherein the mixture obtained in step d) is a dispersion comprising droplets having a Sauter mean droplet size in the range from 30 to 300 micrometers.

5. A process according to claim 1 , wherein the glass fibers are glass fibers having a diameter in the range from 1 to 20 micrometers.

6. A process according to claim 1 , wherein the mixing in step (d) is carried out by means of a static mixer.