Title:
A method for carrying out caustification of the green liquor
Document Type and Number:
Japanese Patent JP6283693
Kind Code:
B2
Abstract:
A process for recausticizing green liquor in a sulphate or Kraft process for wood pulp production, in which a green liquor consisting of an aqueous solution of sodium carbonate as the major component and sodium sulphide is admixed with calcium oxide in a slaker and undergoes a reaction in a recausticizer to form an aqueous suspension containing sodium hydroxide and calcium carbonate as the major components, which suspension is filtered on a first filter and subsequently, after dilution with water in a dilution vessel, is fed over further filters two or three times and filtered to separate solids suspended therein, characterized in that after a first separation of calcium carbonate as the major component and calcium oxide as the minor component, carbon dioxide is added to the aqueous suspension at least during dilution in a dilution vessel and in particular in the dilution vessel (s) upstream of a second and/or a third filter.
Inventors:
Ruff, butter
Hacker, manfred
Raphalt, Stephan
Hacker, manfred
Raphalt, Stephan
Application Number:
JP2015558301A
Publication Date:
February 21, 2018
Filing Date:
February 18, 2014
Export Citation:
Assignee:
Mondi Akchen Gesell Shaft
International Classes:
D21C11/04
Domestic Patent References:
| JP2005179785A | ||||
| JP2009262040A |
Foreign References:
| WO2012027223A1 |
Attorney, Agent or Firm:
Kawaguchi International Patent Office