Utilization of Common Hazelnut (Corylus avellana L.) Prunings for Pulp Production

For the purpose of this study, pulp and handseet were produced from common hazelnut (Coryllus avellana L.) wood by using Kraft methods. Chip/solution ratio was chosen as 1/5, cooking temperature was 170°C and time for reaching the maximum temperature was 90 minutes. Screened yield was found best in 20/26 active alkali/sulfidity ratio with 47.59 %. With increased active alkali/sulfi dity ratios, screened yield was decreased. The best beating degree has been identified as the 50 SR°. According to cooking parameters, while NaOH/Na2S ratio was 20/26 %, tearing index, breaking length and burst index were reached to the maximum value of 3.83 mN · m2/g, 43.23 N · m/g and 1.87 kPa · m2/g, respectively. These values were used for selecting the optimum cooking parameters.