PEMBUATAN PULP KAYU PINUS DENGAN PROSES ALKALIN ETANOL (original) (raw)

2004, Prosiding Seminar Nasional MAPEKI VII

Alkaline pulping is the dominant chemical pulping process today, but it has some serious shortcomings : air and water pollution and the high investment costs. In recent years, the search for pulping processes has led to the development of several organosolv methods capable of producing pulps with properties near those of kraft pulps. In this study, the possibility of ethanol as pulping liquor has been evaluated through alkaline-ethanol process. Materials used in this study where 25-year-old pinus trees. The objective of this study was to find out the optimum concentrations of ccoking agents in pinus pulping. The alkaline-ethanol process has 2 factors, i.e. ethanol concentrations (40%, 50%, 60%, v% based on pulping liquor) and caustic soda concentrations (20%, 25%, 30%, w% based on ovendrywood). The research findings revealed that the average values of screened yield and reject were ranged from 43.67 % – 69.55 % and 0.59 %-16.49 %, respectively. The average values of kappa number and solubility in 1% caustic soda were ranged from 28.9 – 37.4 and 13.0 %-35.24 %, respectively. Ethanol concentrations had no significant effect on screened yield, reject, and kappa number but gave interaction with caustic soda concentrations. Ethanol concentration of 40% and caustic soda concentrations o f 30% gained the best results.