Electrochemical Delignification Mediated with Violuric Acid and Subsequent Bleaching of Poplar Kraft Pulp

Abstract:

Article Preview

The electrochemically mediated delignification (EM)is one of new methods for pulp delignification and bleaching. In this paper, the electrochemical delignification mediated with violuric acid (VIO) of the kraft pulps were carried out. The results showed that VIO was suitable mediator for the electrochemical delignification of poplar kraf pulp. At the optimum conditions, the Kappa number was reduced from 17.4 to 11.7 and viscosity was decreased from 1144cm3/g to 1059cm3/g. The alkali treatment after EM could further reduce Kappa number and increase brightness of electrochemical-VIO treated pulp. The Kappa number of pulp treated with EME could be reduced to 8.9 with the delignification rate of 48.8% and viscosity only decreased to 1065 cm3/g. The brightness of EM E treated pulp increased from original 39.2%ISO to 50.7%. The EM treated pulps could be bleached to 80%ISO with the subsequent QP or EQP sequences at 2.0% of H2O2 charge.

Info:

Periodical:

Advanced Materials Research (Volumes 201-203)

Edited by:

Daoguo Yang, Tianlong Gu, Huaiying Zhou, Jianmin Zeng and Zhengyi Jiang

Pages:

2854-2857

DOI:

10.4028/www.scientific.net/AMR.201-203.2854

Citation:

F. G. Kong et al., "Electrochemical Delignification Mediated with Violuric Acid and Subsequent Bleaching of Poplar Kraft Pulp", Advanced Materials Research, Vols. 201-203, pp. 2854-2857, 2011

Online since:

February 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.