DEVICE FOR CRYSTALLIZING ACRYLIC ACID AND METHOD FOR CRYSTALLIZING ACRYLIC ACID USING SAME

Title:

DEVICE FOR CRYSTALLIZING ACRYLIC ACID AND METHOD FOR CRYSTALLIZING ACRYLIC ACID USING SAME

Document Type and Number:

WIPO Patent Application WO/2011/001887

Kind Code:

A1

Abstract:

A crystallization device is provided with which it is possible to efficiently obtain purified acrylic acid having high purity. The crystallization device is for separating an acrylic-acid-containing solution into a mother liquor and purified acrylic acid, and comprises a crystallizer having a discharge port through which a mother liquor and purified acrylic acid are alternately taken out, a feed line through which the acrylic-acid-containing solution is fed to the crystallizer, and recovery lines which have been connected to the discharge port and through which the mother liquor and the purified acrylic acid are alternately recovered from the crystallizer, the recovery lines having, disposed therein, switch members each comprising a ball valve or gate valve.

Inventors:

SAKAMOTO KAZUHIKO (JP)
UENO KOJI (JP)
ISHII YOSHITAKE (JP)
KITAURA MASATSUGU (JP)

Application Number:

PCT/JP2010/060737

Publication Date:

January 06, 2011

Filing Date:

June 24, 2010

Export Citation:

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Assignee:

NIPPON CATALYTIC CHEM IND (JP)
SAKAMOTO KAZUHIKO (JP)
UENO KOJI (JP)
ISHII YOSHITAKE (JP)
KITAURA MASATSUGU (JP)

International Classes:

C07C51/47; B01D9/02; C07C57/07

Foreign References:

JPH09155101A	1997-06-17
JP2003212818A	2003-07-30
JPS5341637B1	1978-11-06
JPH09155101A	1997-06-17
JP2005015478A	2005-01-20
US20040249199A1	2004-12-09
JP2009155605A	2009-07-16

Other References: