CONTINUOUS RESIN RECOVERY APPARATUS AND METHOD OF RECOVERY

Title:

CONTINUOUS RESIN RECOVERY APPARATUS AND METHOD OF RECOVERY

Document Type and Number:

WIPO Patent Application WO/2004/009653

Kind Code:

A1

Abstract:

A continuous method of resin recovery for recovering a highly purified resin suitable for optical use from which foreign matter and volatile contents have been removed to a high degree. The continuous method of resin recovery comprises the steps of heating a resin solution in a heating pipe at a temperature not lower than the boiling point of solvent; introducing the resin solution heated at a temperature not lower than the boiling point of solvent into a preliminary drying chamber maintained at reduced pressure; separating the resin from solvent vapor in the preliminary drying chamber; melting the separated resin; introducing the molten resin into a precision drying chamber maintained at reduced pressure; and causing the molten resin to pass through a perforated plate in the precision drying chamber.

Inventors:

KURASHIMA KAZUYOSHI (JP)
SUMI YOSHITERU (JP)
ETOH YASUO (JP)
MINEZAKI KUMIKO (JP)
NINOMIYA DAISUKE (JP)

Application Number:

PCT/JP2003/009336

Publication Date:

January 29, 2004

Filing Date:

July 23, 2003

Export Citation:

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Assignee:

ASAHI GLASS CO LTD (JP)
KURASHIMA KAZUYOSHI (JP)
SUMI YOSHITERU (JP)
ETOH YASUO (JP)
MINEZAKI KUMIKO (JP)
NINOMIYA DAISUKE (JP)

International Classes:

B01D1/00; B01D1/02; B01D1/18; C08F6/00; C08F6/12; C08F6/28; F26B5/04; (IPC1-7): C08F6/00

Domestic Patent References:

WO2003004550A1

2003-01-16

Foreign References:

JP2002119811A	2002-04-23
JPS5515645A	1980-02-02
JPH0632821A	1994-02-08

Other References: