Step-wise delignification response in an industrial two-stage oxygen-alkali delignification process

Pulp and Paper Canada

Volumn 102, Issue 6, 2001, Pages 53-55

  Ala Kaila, K ^a   Reilama, I ^a  

^a Metsä Botnia ^*  (Finland)

Author keywords

Alkali treatment; Delignification; Fractionation; Kraft pulps; Lignins; Multi stage process; Oxygen; Softwoods

Indexed keywords

CHEMICAL REACTORS; DELIGNIFICATION; LEACHING; LIGNIN; NATURAL FIBERS; OXYGEN; PAPER AND PULP MILLS; PULP COOKING; SOFTWOODS; STRUCTURE (COMPOSITION); SUSPENSIONS (FLUIDS); WASHING;

KAPPA NUMBER MEASUREMENT; OXYGEN-ALKALI DELIGNIFICATION; PULP FIBER;

KRAFT PULP;

KAPPA NUMBER; LIGNIN CONTENT; MEDIUM CONSISTENCY; PICEA ABIES; PINUS SYLVESTRIS; REACTION TIME; SOFTWOOD PULPS; TWO STAGE PROCESS; UNBLEACHED PULPS; WASHERS;

EID: 0035358170     PISSN: 03164004     EISSN: None     Source Type: Trade Journal    
DOI: None     Document Type: Article

References (18)

1. The effect of ECF and TCF bleaching on the surface chemical composition of kraft pulp as determined by ESCA
2. Washing for low bleach chemical consumption
3. Alkaline leaching of kraft pulps for lignin removal
4. Enhanced lignin removal in brown stock washing
5. Delignification by hot alkali extraction
6. Diffusion of lignin macromolecules within the fibre walls of kraft pulp, Part I: Determination of the restricted diffusion coefficient under alkaline conditions
7. Leaching of organic material from kraft pulps
8. Leaching of organic material in washing after oxygen delignification
9. The rate of solute removal from kraft pulp fibres during washing
10. Pulp washing: Influence of temperature on lignin leaching from kraft pulps
11. Structural changes in lignin during oxygen bleaching
12. Hydrophilic groups in lignin after oxygen bleaching
13. Development and verification of a predictive oxygen delignification model for hardwood and softwood kraft pulp
14. The kinetics of oxygen bleaching
15. Extended delignification by combination of modified kraft pulping and oxygen bleaching
16. Kinetics of oxygen delignification of eucalyptus kraft pulp
17. On the structural significance of the kappa number measurement
18. Dynamic response in pH and the transient behavior of some chemical elements in pulp-water suspensions