Form of hydroquinone and production thereof
AssigneeRhodia Operations
InventorJean-Claude Le Thiesse
Life of this patent
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Abstract
Novel hydroquinone flakes are prepared from a powder thereof, by, if necessary, melting the hydroquinone powder, depositing the hydroquinone in the liquid state as a film on a support made of a material or coated with a material which conducts heat, solidifying the hydroquinone by adjusting the support to an appropriate temperature, and recovering the solidified product in the form of flakes.
Claims8
Flakes of hydroquinone, comprising particles having a platelet shape and having a length ranging from 0.5 to 6 cm, a width ranging from 0.5 to 3 cm and a thickness ranging from 400 μm to 1,500 μm, said flakes having a level of fine particles, particles having dimensions of less than 100 μm, of less than 3% by weight thereof, wherein said flakes are formed by depositing hydroquinone in a molten liquid state as a film on a support made of a thermally conductive material or coated with a thermally conductive material, solidifying the hydroquinone by bringing the support to the appropriate temperature, recovering the solidified product in the form of flakes using any appropriate means.
Dependencies are inferred from the claim text.