Abstract
The results of this study on the role of neutral resin components on pitch deposition provide the broadest base so far available for relating variation in pulping stages to variation in tendency of pitch accumulation. It is of interest to note that dominant presence of neutral components in lauan resin is the primary cause of the so-called pitch problems associated with pulp manufacturing from lauan waste wood. There are limits within which there would be varying degrees of polarity of the neutral fractions with their pitch-causing potential, and beyond which the polarity of one or other of the neutral fractions does not cause severe pitch trouble. Fvaulation of the components of the neutral fraction of Lauan resin indicates that saturated higher hydrocarbons, saturated aliphatic alcohols, β-sitostero, Ψ-taraxasterone and Ψ-taraxasterol are main constitutents of the pitch trouble causing fractions. The significance of these result is discussed.
