Process and equipment for crystallizing an inorganic substance
AssigneeSolvay (Societe Anonyme)
InventorsJacques Darmont, Leopold Detry
Life of this patent
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Abstract
Process and installation for crystallising an inorganic substance in a fluidised bed of crystals (14), which is generated by subjecting a solution supersaturated in the substance to be crystallised to an ascending circulation across a distributor (12), located below the bed (14), of a fluidised-bed reactor, a fraction (22) of the supersaturated solution being taken off upstream of the distributor (12) and being recycled downstream of the distributor (12) into the fluidised bed (14) or into the mother liquor from the crystallisation, and the mother liquor being supersaturated for reconstituting the said supersaturated solution.
Claims9
A process for crystallizing an inorganic substance in a fluidized bed of crystals, comprising:
- generating a fluidized bed of crystals by passing a feed solution supersaturated in said inorganic substance in an ascending flow through a distributor located below the fluidized bed of a fluidized bed crystallizer,
- crystallizing said inorganic substance in a crystallization zone containing the fluidized bed of crystals, the mother liquor from the crystallization zone exiting the crystallization zone downstream of the fluidized bed, said mother liquor being recycled and used in the reconstitution of said feed solution,
- removing a fraction of said feed solution from the ascending circulation upstream of the distributor,
- and supplying said fraction to the crystallization zone downstream of the distributor, at a location prior to the mother liquor exiting the crystallization zone.
Dependencies are inferred from the claim text.