Process for the preparation of purified hydroquinone put into the form of flakes, the percentage by weight of particles with dimensions of less than 100μm of which is less than 3%, starting from a crude hydroquinone HQ 0 comprising from 96 to 99.5% by weight of hydroquinone and from 0.5 to 4% by weight of impurities, said impurities including at least resorcinol, pyrogallol and traces of pyrocatechol, characterized in that it comprises the following stages: - a stage of purification of the crude hydroquinone by distillation, comprising: a topping distillation, in which the crude hydroquinone HQ 0 is injected into a distillation column and where the resorcinol is removed as distillation top product, optionally in conjunction with all or part of the other light impurities having a lower evaporation temperature than that of hydroquinone, whereby a crude mixture M, comprising hydroquinone and the heavy impurities, is recovered at the column bottom; and a tailing distillation, in which the crude mixture M obtained in stage is injected into a distillation column and where the pyrogallol is removed at the column bottom, optionally in conjunction with all or part of the other heavy impurities having a higher evaporation temperature than that of hydroquinone, whereby hydroquinone in a purified form is recovered at the column top; the distillation stages and being carried out under an inert atmosphere and so that the temperature in the distillation columns is at least 175°C, the pressure is between 50 and 100 millibar and the residence time is less than 1 hour, - a stage of forming the purified hydroquinone obtained at the distillation outlet, by deposition of the latter in the liquid state as a film on a support made of a thermally conductive material or coated with a thermally conductive material, followed by the solidification thereof by bringing the support to the appropriate temperature, then recovery of the solidified hydroquinone in the form of flakes, using any appropriate means. - a stage of purification of the crude hydroquinone by distillation, comprising: a topping distillation, in which the crude hydroquinone HQ 0 is injected into a distillation column and where the resorcinol is removed as distillation top product, optionally in conjunction with all or part of the other light impurities having a lower evaporation temperature than that of hydroquinone, whereby a crude mixture M, comprising hydroquinone and the heavy impurities, is recovered at the column bottom; and a tailing distillation, in which the crude mixture M obtained in stage is injected into a distillation column and where the pyrogallol is removed at the column bottom, optionally in conjunction with all or part of the other heavy impurities having a higher evaporation temperature than that of hydroquinone, whereby hydroquinone in a purified form is recovered at the column top; the distillation stages and being carried out under an inert atmosphere and so that the temperature in the distillation columns is at least 175°C, the pressure is between 50 and 100 millibar and the residence time is less than 1 hour, a topping distillation, in which the crude hydroquinone HQ 0 is injected into a distillation column and where the resorcinol is removed as distillation top product, optionally in conjunction with all or part of the other light impurities having a lower evaporation temperature than that of hydroquinone, whereby a crude mixture M, comprising hydroquinone and the heavy impurities, is recovered at the column bottom; and a tailing distillation, in which the crude mixture M obtained in stage is injected into a distillation column and where the pyrogallol is removed at the column bottom, optionally in conjunction with all or part of the other heavy impurities having a higher evaporation temperature than that of hydroquinone, whereby hydroquinone in a purified form is recovered at the column top; - a stage of forming the purified hydroquinone obtained at the distillation outlet, by deposition of the latter in the liquid state as a film on a support made of a thermally conductive material or coated with a thermally conductive material, followed by the solidification thereof by bringing the support to the appropriate temperature, then recovery of the solidified hydroquinone in the form of flakes, using any appropriate means.