Title:
METHOD OF REPLACING DISPERSION MEDIUM
Document Type and Number:
WIPO Patent Application WO/2008/013100
Kind Code:
A1
Abstract:
A method of replacing the first dispersion medium of a raw slurry consisting of
a first dispersion medium and crystalline isophthalic acid with a second dispersion
medium. The raw slurry is fed into the vertically extending cylindrical part
of cyclone nozzle disposed at a superior portion of replacement vessel of a dispersion
medium replacing unit from the tangential direction of the cylindrical part
and makes circular motion along the internal wall surface of the cylindrical
part. The raw slurry making circular motion is allowed to flow out from an opening
disposed at a vertically inferior position of the cylindrical part and dispersed
in a second dispersion medium fed from an inferior portion of the replacement
vessel. The replaced slurry composed mainly of crystalline isophthalic acid
and the second dispersion medium is drawn out from an inferior portion of the replacement
vessel while the first dispersion medium is drawn out from a superior portion
of the replacement vessel.
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Inventors:
INARI MASATO (JP)
ZAIMA FUMIYA (JP)
ZAIMA FUMIYA (JP)
Application Number:
PCT/JP2007/064286
Publication Date:
January 31, 2008
Filing Date:
July 19, 2007
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
INARI MASATO (JP)
ZAIMA FUMIYA (JP)
INARI MASATO (JP)
ZAIMA FUMIYA (JP)
International Classes:
C07C51/43; B01D12/00; C07C51/47; C07C63/24
Foreign References:
| JPH072732A | 1995-01-06 | |||
| JPH08231465A | 1996-09-10 | |||
| JPH1045667A | 1998-02-17 | |||
| JPH08308309A | 1996-11-26 | |||
| JP2001247868A | 2001-09-14 | |||
| JPH07274963A | 1995-10-24 | |||
| JPS543856B1 | 1979-02-27 | |||
| JPS5753431A | 1982-03-30 |
Other References:
See also references of EP 2050732A4
Attorney, Agent or Firm:
OHTANI, Tamotsu (Bridgestone Toranomon Bldg.6F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, JP)
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