Method for purifying alkyl hydroperoxide by extraction with water and separation of the aqueous phase

A process for the purification of a mixture containing at least one alkyl hydroperoxide and at least one dialkyl peroxide, wherein it successively comprises:

• a) at least one stage of extraction, carried out with water, of said mixture so as to obtain a first phase rich in alkyl hydroperoxide and a second phase rich in dialkyl peroxide, wherein the extraction stage a) is carried out with a water content which is at least 5 times greater than a content by weight of the mixture,
• b) at least one stage of concentration of the first phase obtained in stage a) so as to obtain two new phases, known as third and fourth phase,
• c) optionally a stage of separation by settling of the third phase so as to obtain a fifth and sixth phase,
• d) optionally a stage of recovery of the fifth phase obtained in stage c).