Oxygen delignification of RDH kraft pulp and conventional kraft pulp from eucalyptus was studied, and optimum conditions of oxygen delignification were determined.

This paper systematically investigated bleaching properties of AS-AQ pulp of Japanese larch and compared the differences between AS-AQ pulp and KP pulp in order to understand physical properties of Japanese larch pulp.

This article was first introduced Eucalptuspellita as raw material,Studied the fiber morphology and chemical composition of different families,KP pulp,bio-technology for bleaching,beating and the characteristics of the process,and biobleaching to explore the mechanism.

This article analyzed the morphology of fibers and fines in masson pine kraft pulp and white water.

This paper analyzed the morphology of vessel cell of bleached acacia kraft pulp in different beating levels.

As a result,the physical properties of KP unbleached pulp were close to B grade national standard of unbleached softwood KP pulp,those of KP bleached pulp reached A grade national standard of bleached softwood KP pulp.

The results showed that the cooking yield of AS-AQ pulp is higher than KP by 2 percent, and intrinsic viscosity is higher by 20% when the kappa number are alike.

Delignification of wheat straw kraft pulp with laccase mediator system(LMS) and the affecting factors including reaction time, temperature, dosage of laccase mediator on delignification were studied in this paper.