Title:
両性樹脂を利用してパルプ化用液から硫化物を分離する方法
Document Type and Number:
Japanese Patent JP4320057
Kind Code:
B2
Abstract:
A process using an amphoteric ion-exchange resin, also known as a "snake-cage polyelectrolyte" resin separates kraft white liquor into sulphide-rich and caustic-rich components. The sulphide-rich component can be used in the initial stage of pulping, pretreatment of wood chips prior to pulping, or it can be used to make polysulphide-rich liquor. The caustic-rich component can be used in the final delignification phase, in place of sodium hydroxide or white liquor in oxygen delignification, pH adjustment and flue gas scrubbing. The same system can be used to separate green and polysulphide liquors into sulphide-rich and sulphide-poor components, and to remove sulphide from other mill caustic streams contaminated with sulphide.
Inventors:
Palologue, Michelle
Thompson, Roxalley
Barry, Richard, McKinnon
Brown, Craig, Jay.
Michelle, C-Day
Thompson, Roxalley
Barry, Richard, McKinnon
Brown, Craig, Jay.
Michelle, C-Day
Application Number:
JP53143998A
Publication Date:
August 26, 2009
Filing Date:
January 23, 1998
Export Citation:
Assignee:
FP Innovations
Eco-Tech Limited
Eco-Tech Limited
International Classes:
D21C11/04; B01J43/00; D21C11/00
Domestic Patent References:
| JP55090693A | ||||
| JP5031374A | ||||
| JP8209573A |
Foreign References:
| US5536384 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Katsunori Ando
Yukihiro Ikeda
Sadafumi Kobori
Hajime Asamura
Katsunori Ando
Yukihiro Ikeda
Sadafumi Kobori
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