Apparatus for purifying crystals

Details Apparatus for purifying crystals Apparatus for purifying crystals

1987-04-13

1989-02-21

Stoll, Robert L.

Chemical apparatus and process disinfecting, deodorizing, preser

Physical type apparatus

Crystallizer

422253, 422254, 62542, 62544, B01D 900

Patent

active

048063185

ABSTRACT:
An apparatus for purifying crystals comprises a crystal purifying tower having a transverse cross-section of two partially overlapping circles, stirrers each comprising a rotational shaft passing through the center of each of the circles and having blade members disposed spirally on its surface, a solid-liquid separation plate disposed at the bottom portion of the tower, a liquid take out means disposed below the separation plate, a starting crude crystal feed means disposed above the separation plate, a purified crystal take out means disposed at the upper portion of the tower, heating means disposed in the tower in a multistage manner along the longitudinal direction of the tower, and purified crystal circulation means for cooling a portion of purified crystals taken out from the tower and feeding back the cooled crystals to the tower at at least one portion of the tower.

REFERENCES:
patent: 2659761 (1953-11-01), Frevel et al.
patent: 2851368 (1958-09-01), Findlay
patent: 3305320 (1967-02-01), Weech
patent: 3392539 (1968-07-01), Grimmett
patent: 3770386 (1973-11-01), Hayashi et al.
patent: 4544391 (1985-10-01), Oka
patent: 4588562 (1986-05-01), Saitoh et al.

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