PROCESS FOR PREPARING PURIFIED HYDROQUINONE

摘要

The present invention relates to a process for preparing hydroquinone devoid of the impurities resulting from its preparation process. The process for preparing purified hydroquinone from a crude hydroquinone essentially containing hydroquinone and small amounts of impurities including at least resorcinol, pyrogallol and traces of pyrocatechol is characterized in that it comprises at least the following steps: dissolving the crude hydroquinone in water, crystallizing the hydroquinone, separating the purified hydroquinone, and, optionally, a step of drying the purified hydroquinone. The process of the invention may include other steps, and, depending on the embodiment selected, which may include a different sequence of the steps, it is possible to obtain hydroquinone in various degrees of purity.