Title:
METHOD OF RECOVERING CRYSTAL COMPONENT AND CRYSTAL COMPONENT RECOVERING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/135738
Kind Code:
A1
Abstract:
A method of recovering a crystal component, in which without circulatory use of
a filtrate or washing filtrate as a washing liquid and without circulatory use
thereof in re-slurrying of crystal component, a reaction solvent can be efficiently removed
from the crystal component; and a relevant crystal component recovering system.
There is provided a method of recovering a crystal component, comprising the
steps of feeding a crystal-component-containing slurry produced by reactor (50)
into first rotary filter (23) where the crystal component is recovered as a cake
layer on a filter cloth surface thereof, washing the cake with 95% acetic acid
to thereby remove mainly impurities from the crystal component and feeding the
obtained crystal component into re-slurrying tank (24); feeding pure water alone
into the re-slurrying tank (24) to thereby obtain a re-slurry from the cake; and
feeding the re-slurry into second rotary filter (30) where the crystal component is
recovered as a cake layer on a filter cloth surface thereof and washing the cake layer
with pure water to thereby remove acetic acid.
Inventors:
YAMASHITA AKIO (JP)
HUJIWARA AKIRA (JP)
HUJIWARA AKIRA (JP)
Application Number:
PCT/JP2006/310330
Publication Date:
November 29, 2007
Filing Date:
May 24, 2006
Export Citation:
Assignee:
MITSUBISHI KAKOKI KK (JP)
YAMASHITA AKIO (JP)
HUJIWARA AKIRA (JP)
YAMASHITA AKIO (JP)
HUJIWARA AKIRA (JP)
International Classes:
B01D37/00; B01D33/06
Foreign References:
| JPH11179115A | 1999-07-06 | |||
| JPH06327915A | 1994-11-29 | |||
| JPS63265804A | 1988-11-02 |
Attorney, Agent or Firm:
OHARA, Hajime (14-14 Shinyokohama 2-chome,Kohoku-k, Yokohama-shi Kanagawa 33, JP)
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