CRYSTALLIZATION APPARATUS AND CRYSTALLIZATION METHOD

Title:

CRYSTALLIZATION APPARATUS AND CRYSTALLIZATION METHOD

Document Type and Number:

WIPO Patent Application WO/1998/037938

Kind Code:

A1

Abstract:

A crystallization apparatus comprising a crystallization tank (52), seed crystal feed means (70, 72) for feeding a seed crystal of a crystallization material to the crystallization tank, feed solution feed means (82, 84, 78) for feeding a feed solution of the crystallization material to the crystallization tank, crystallization material discharge means (80), a tube baffle (54) disposed inside the crystallization tank, for defining a crystallization portion (D) in an inner area and a lower area of the tube baffle and forming a classification portion (A) in an area between the tube baffle and the crystallization tank, stirring means (56, 58) for stirring the seed crystal and the feed solution in a predetermined direction in the crystallization portion, buffer means disposed in the classification portion, for defining a buffer portion (B) and a gravitational settling portion (C), a classification portion outlet portion (74) so disposed as to communicate with the gravitational settling portion of the classification portion, and gravitational settling portion speed setting means (75) for generating an ascending flow in the gravitational settling portion by discharging the solution from the classification portion outlet and for setting the ascending linear velocity of the ascending flow to a level not lower than the settling rate of the fine crystal to be taken out.

Inventors:

MIYAHARA ICHIRO (JP)
KITAMURA TATSUO (JP)
YOKOYAMA MASATO (JP)
KOUKO TAKASHI (JP)

Application Number:

PCT/JP1998/000738

Publication Date:

September 03, 1998

Filing Date:

February 24, 1998

Export Citation:

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Assignee:

AJINOMOTO KK (JP)
MIYAHARA ICHIRO (JP)
KITAMURA TATSUO (JP)
YOKOYAMA MASATO (JP)
KOUKO TAKASHI (JP)

International Classes:

B01D9/00; (IPC1-7): B01D9/02

Foreign References:

JPS59193101A	1984-11-01
JPS5597203A	1980-07-24

Other References: