Kraft Borate Laboratory Cooks with Varying Sulfidity, 2002 Fall Technical Conference

This paper presents the results of a kraft pulping study conducted on western hemlock with white liquor prepared in mill trials using the autocausticizing process. Experiments were performed at 28% and 20% sulfidity levels using both autocausticized and conventional kraft liquors obtained from a pulp mill located in the western United States. The primary conclusion drawn from this work is that for western hemlock at equivalent kappa numbers, the screened pulp yield improved with the use of autocausticized white liquor. At a given kappa number, a higher Hfactor was required for the pulp cooked using autocausticized liquor compared to that cooked using the conventional liquor; however, the pulp viscosity and strength were not affected much by the increase in the H-factor, which suggests that borate may protect cellulose fibers from extended damage expected at higher H-factors.

Author: Genco, J.M., Zou, H., Bennett, P.D., Kochesfahani, S., Bair, C.
Kraft Borate Laboratory Cooks with Varying Sulfidity, 2002 F
Kraft Borate Laboratory Cooks with Varying Sulfidity, 2002 Fall Technical Conference
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