METHOD AND APPARATUS FOR CRYSTALLIZATION OF ORGANIC COMPOUND THROUGH ADIABATIC COOLING

Title:

METHOD AND APPARATUS FOR CRYSTALLIZATION OF ORGANIC COMPOUND THROUGH ADIABATIC COOLING

Document Type and Number:

WIPO Patent Application WO/2006/112186

Kind Code:

A1

Abstract:

[PROBLEMS] To provide a method and apparatus for the crystallization of an organic compound through adiabatic cooling, which can attain a reduction in operation and equipment cost. [MEANS FOR SOLVING PROBLEMS] In a crystal tank (20), an organic-compound liquid mixture containing a refrigerant is subjected to an operation for adiabatically cooling and vaporizing the refrigerant. The crystal slurry produced by this operation is discharged from the crystal tank (20). The vapor generated is pressurized with a compressor (30) to a pressure not lower than the operation pressure in the crystal tank (20) and led to an absorption condenser (10). In the absorption condenser (10), the pressurized vapor is cooled and condensed while keeping it in contact with a solution of the organic compound. The crystal slurry discharged from the crystal tank (20) is led to a purification means (70) to purify the crystals. The supernatant in the purification means (70) is led to at least one of the crystal tank (20) and the absorption condenser (10).

Inventors:

TAKEGAMI KEIZO (JP)
WAKAYAMA JUNJI (JP)
ISHII KIWAMU (JP)
OUCHI KENJI (JP)

Application Number:

PCT/JP2006/304330

Publication Date:

October 26, 2006

Filing Date:

March 07, 2006

Export Citation:

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Assignee:

TSUKISHIMA KIKAI CO (JP)
TAKEGAMI KEIZO (JP)
WAKAYAMA JUNJI (JP)
ISHII KIWAMU (JP)
OUCHI KENJI (JP)

International Classes:

B01D9/02; C07B63/00; C07C7/14; C07C13/18; C07C15/08

Foreign References:

JPS5333551B1	1978-09-14
JPH0782210A	1995-03-28
JPH04327542A	1992-11-17
JP2003265150A	2003-09-24
JPH0342001A	1991-02-22

Other References: