Research on xylanase for bleaching of popular kraft pulp.

In this paper,popular 107 was used as the material.After kraft pulping,xylanase was used for the bleaching.Different xylanase amount,temperature,time,pH value and concentration were carried out for pulp bleaching.The results showed as follows:(1)After xylanase bleaching,the Kappa number and viscosity of popular pulp were influenced;(2) The best condition for xylanase dealing with the popular kraft pulp were 5 wU·g-1enzyme concentration,at 50 ℃,reaction for 90 min,at pH value 6.0 and 8% plasma concentration;(3)The impacts of xylanase amount and pH value on the Kappa number and viscosity are much more obviously than other factors.