Slurry crystallization method using bubbles directed at a heat e

Details Slurry crystallization method using bubbles directed at a heat e Slurry crystallization method using bubbles directed at a heat e

1995-06-02

1997-01-14

Breneman, R. Bruce

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth from liquid or supercritical state

Having pulling during growth

117 41, 4222451, 422251, C30B 750

Patent

active

055934960

ABSTRACT:
A surface-cooled fluid bed crystallizer apparatus and method are disclosed wherein submerged heat exchanger surfaces (typically heat exchanger tubes or plates through which a coolant is passed) are bathed with a stream of gas bubbles (preferably air). The gas bubbles increase localized velocity at the heat exchanger surfaces, improves heat transfer, reduces crystallization on the heat exchanger surfaces and gently keeps the crystals in suspension, thereby avoiding unwanted nucleation as is characterized by the use of mechanical circulation devices. By continuously removing the depleted magma and crystals, the crystallizer can be operated in a continuous mode.

REFERENCES:
patent: 3476430 (1976-08-01), Houston et al.
patent: 3599702 (1971-08-01), Mollerstedt et al.
patent: 3883311 (1975-05-01), Kanai et al.
patent: 3891395 (1975-06-01), Winkler

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