CRYSTALLIZATION APPARATUS AND CRYSTALLIZATION METHOD

Title:

CRYSTALLIZATION APPARATUS AND CRYSTALLIZATION METHOD

Document Type and Number:

WIPO Patent Application WO/2001/014037

Kind Code:

A1

Abstract:

A crystallization apparatus having an agitating vessel, a liquid circulating means which circulates a liquid or slurry along the wall of the agitating vessel and one or more means for generating a temperature difference which can generate a temperature difference on the wall of the vessel. The temperature difference generating means is disposed, for example, in or below a region at which a liquid or slurry being sprayed from a liquid spraying device by the rotation of the device contacts with the wall of the vessel and renders the temperature of the liquid or slurry sprayed to be higher or lower than that of a liquid or slurry surrounding it. The crystallization apparatus provides large areas for evaporation and heat transfer, which leads to a decreased induction period for crystal formation, and thus results in the formation of crystals having a large average particle size and a narrow particle size distribution. Further, the apparatus can be used for obtaining substantially only crystals of a specific crystal form, that is, the apparatus enables the control of crystal polymorphism.

Inventors:

OOSHIMA HIROSHI (JP)
NODA HIDEO (JP)

Application Number:

PCT/JP2000/002469

Publication Date:

March 01, 2001

Filing Date:

April 14, 2000

Export Citation:

Click for automatic bibliography generation Help

Assignee:

KANSAI CHEM ENG (JP)
OSHIMA HIROSHI (JP)
NODA HIDEO (JP)

International Classes:

B01D9/00; B01F7/00; B01F7/16; B01F15/00; B01F15/06; C13B30/02; (IPC1-7): B01D9/02; B01F15/06; B01F7/16

Foreign References:

EP0861685A2	1998-09-02
JPS58104603A	1983-06-22
JPS56152702A	1981-11-26
JPS472712A

Other References: