The Influence of Potassium Borohydride (KBH4) On Kraft Pulp Properties of Maritime Pine

In this study, the effects of potassium borohydride (KBH4) on maritime pine (Pinus pinaster Ait.) kraft pulp and paper properties were investigated. 0.5%, 1%, 1.5%, and 2% (based on oven-dried wood) KBH4 added kraft cookings were carried out under the fixed cooking conditions. KBH4-free kraft cooking was also done as control cooking. The results revealed that pulp yield, kappa number, and beating time increased with addition of KBH4 to cooking liquor. The screened yield increased 7.69 point (from 46,21% to 53.90%) with 2% KBH4 addition to control cooking. The brightness values of handsheets were increased with KBH4 addition. Strength properties of handsheets significantly decreased with addition of KBH4.