Single-crystal – oriented-crystal – and epitaxy growth processes; – Apparatus – For crystallization from liquid or supercritical state
Patent
1993-03-09
1995-03-14
Breneman, R. Bruce
Single-crystal, oriented-crystal, and epitaxy growth processes;
Apparatus
For crystallization from liquid or supercritical state
117200, 117202, 117204, C30B 704
Patent
active
053968638
ABSTRACT:
Installation for the crystallization of an inorganic substance in a crystal slurry, by desupersaturation of a supersaturated solution, the installation comprising a crystallization chamber which has a vertical axis and is divided into a central zone (4) and an annular zone (5), a device (9, 10) designed to bring about a vertical translation of the slurry in the central zone (4) and a translation in the opposite direction in the annular zone (5), a device (8) for withdrawing slurry, comprising a tube (23, 24) which opens into one of the abovementioned zones, a member (14) for mechanical shearing of the slurry, comprising, a disc (17) carrying a ring of shearing teeth (19), and a tube (6, 31) passing through the cover (30) and serving to introduce anhydrous sodium carbonate, the tube (31) having a prolongation inside the crystallization chamber, over which prolongation a film of water is caused to circulate.
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Breton Claude
Ninane Leon
Breneman R. Bruce
Garrett Felisa
Solvay ( Societe Anonyme)
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