Bazı çam türlerinden kraft kağıt hamuru elde etme sürecinde sodyum borhidrür ilavesinin etkileri

Abstract

The Calabrian pine (Pinus brutia Ten.) and Monterey pine (Pinus radiata D. Don.) species were pulped using an alternative Sodium borohydride (NaBH 4 )-Kraft pulping process with the aim of improving delignification and total yield. The effects of reaction conditions on the pulp yield and degree of delignification were evaluated.The results indicate that adding sodium borohydride to conventional kraft process was effective for improving both delignification and yield of both pine species. It was found that the delignification proceeded more rapidly and more selectively with NaBH 4 -kraft than it did with conventional kraft alone, giving higher yields at a given kappa number. However, the best Sodium borohydride NaBH 4 -Kraft pulping condition for the Calabrian pine was found with 16% Active Alkali, 28% Sulfidity and 0.5% NaBH 4 level whereas the best pulping conditions for Monterey pine was found with 20% Active Alkali, 26% Sulfidity and 0.7% NaBH 4 level.