Pulping Catalysts from Lignin

摘要: Lignin, a common material in trees and woody plants, is currently byproduct of pulp paper production. However, joint research at the National Renewable Energy Laboratory Institute Paper Science Technology aimed broadening commercial uses lignin. One project assessing potential converting lignin into anthraquinone-like pulping catalysts. Anthraquinone (AQ) improves kraft pulping, but its cost, which ranges from $4.00 to $4.50 per pound, hinders widespread use. Three processes for catalysts were evaluated their technical economic feasibility. Preliminary results indicate that two appear viable. Amortized production costs using without intermediate conversion vanillin syringaldehyde, organosolv estimated be $1.24 79 cents respectively. Comparing these competing petrochemical- based, AQ-producing methods, showed lignin-based routes potentially most cost effective.