Pulping Characteristics of Lops and Tops from Five Central Indian Hardwoods (Bastar Area)

摘要

Investigations were carried out on pulping of bottom, middle, top and branch portions of five hardwood species from the Central Indian forests. These were Shorea robusta, Terminalia tomentosa, Pterocarpus mersupium, Diospyros melanoxylon, and Anogeissus latifolia. Black liquors obtained from cooks from the different portions of the trees were also studied with respect to viscosity and precipitation characteristics during evaporation. It was observed that there were only very slight differences in the pulp and the black liquor characteristics from the different portions of the tree. It was concluded that the use of the lops and tops in the hardwood mixture would not have significantly adverse effects on pulp yield, Kappa number, pulp strength characteristics, or the black liquor properties.