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Title:
CONTINUOUS PROCESS OF MANUFACTURE AND AFTER-TREATMENT OF POLYSACCHARIDE DERIVATIVE
Document Type and Number:
Japanese Patent JP2003327601
Kind Code:
A
Abstract:

To provide a continuous process of manufacture and after-treatment of polysaccharide derivatives.

(a) A suspension liquid flow consisting of a solid SE and a liquid phase LE is, as necessary, pre-heated at 185°C and continuously introduced into the top portion of the column, as necessary, under a pressure buffer up to 6×106 Pa. Then, the same or a different liquid phase is filled at the same temperature. (b) The solid SE is freely passed through the liquid phase L by gravity and settled at the bottom of the column. In this step, the solid SE is converted into a solid SA by the reaction with the liquid L and/or conditioning. (c) An ascending gas G is discharged from the column at the top. (d) While the filled liquid level is maintained at a specific level, the solid SA is again discharged continuously from the bottom of the column as a suspension liquid by adding the liquid phase LR which is previously taken out from the top of the column and transported to the bottom of the column through a separate connection part and/or by a liquid phase LN newly added from the outside to the bottom.


Inventors:
ECKHARDT VOLKER
LOHRIE MARTIN
SCHRIEWER BERND
TANNEBERGER HOLGER
Application Number:
JP2003129267A
Publication Date:
November 19, 2003
Filing Date:
May 07, 2003
Export Citation:
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Assignee:
WOLFF CELLULOSICS GMBH & CO KG
International Classes:
C08B5/02; C08B11/08; C08B11/12; C08B11/193; C08B11/20; C08B5/10; C08B31/00; C08B31/12; C08B37/00; F42C1/10; F42C15/23; (IPC1-7): C08B5/10; C08B11/08; C08B11/12; C08B31/12
Domestic Patent References:
JP2001334107A2001-12-04
JPH0760009A1995-03-07
JP2000317495A2000-11-21
JPS5926108A1984-02-10
JPH04256405A1992-09-11
JP2005523153A2005-08-04
JP2001334107A2001-12-04
JPH0760009A1995-03-07
JP2000317495A2000-11-21
JPS5926108A1984-02-10
JPH04256405A1992-09-11
JP2005523153A2005-08-04
Foreign References:
US4401809A1983-08-30
US4401809A1983-08-30
Attorney, Agent or Firm:
Toshio Yano (4 outside)



 
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