Oxygen-Alkali Treatment of Kraft Pulp and Cellobiitol. Model Experiments and Applied Studies of Interest for Oxygen Bleaching
Doctoral thesis, 1992

During oxygen delignification of kraft pulp the alkalinity has a decisive influence upon the selectivity, defined as viscosity at a given kappa number. Using 0.2% pulp consistency in order to achieve constant pH-levels a minimum selectivity was reached at pH 13, corresponding to 0.1 M NaOH. At higher pH-levels the selectivity increased and the yield decreased. By lowering the pH the selectivity and the yield increased. With Na2CO3 as active alkali the selectivity increased with decreasing alkalinity. Additions of large amounts of magnesium converted the alkali to Mg(OH)

selectivity

pH-levels

copper

oxygen delignification

catalytic effects

iron

alkali

cellobiitol

magnesium

yield

Author

Bengt Järrehult

Department of Engineering Chemistry

Other publications Research

Subject Categories (SSIF 2011)

Chemical Sciences

ISBN

91-7032-715-7

Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 879

More information

Created

10/7/2017

Feedback and support

If you have questions, need help, find a bug or just want to give us feedback you may use this form, or contact us per e-mail research.lib@chalmers.se.

About

Research.chalmers.se contains research information from Chalmers University of Technology, Sweden. It includes information on projects, publications, research funders and collaborations.

More about coverage period and what is publicly available

Privacy and cookies

Accessibility

Citation Style Language
citeproc-js (Frank Bennett)

Links

Chalmers University of Technology

SE-412 96 GOTHENBURG, SWEDEN
PHONE: +46 (0)31-772 10 00
WWW.CHALMERS.SE