Beads of a phenolic compound and a method of obtaining same
AssigneeRhodia Chimie
InventorJean-Claude Le Thiesse
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Abstract
The present invention relates to a novel presentation of a phenolic compound in the solid form. More particularly, the invention provides beads of hydroquinone. The invention also pertains to the preparation of said beads. The process of the invention is characterized in that a hot concentrated aqueous solution of a phenolic compound is prepared, then the solution is fragmented into droplets and the droplets obtained are cooled in a gas stream so that they solidify into beads which are then recovered and dried.
Claims30
1-30. (canceled)
The beads of a phenolic compound having a high hot solubility of at least 500 g/l at a reference temperature of 90° C., and a large difference of solubility between its hot solubility and cold solubility, i.e. between a first operational temperature being the temperature in a fragmentation apparatus and a second operational temperature the being the temperature of a cooling gas stream, said beads being both attrition resistant and porous.
42 The beads according to claim 35, having an attrition resistance of between 90% and 100%, optionally more than 98%.
Dependencies are inferred from the claim text.