RECOVERY OF LIGNOCELLULOSIC MATERIALS FROM THE PHL OF KRAFT-BASED DISSOLVING PULP PROCESS USING CATIONIC POLYMERS
The pre-hydrolysis liquor (PHL) of kraft-based dissolving pulp production process contains lignin that can be used as fuel source, and hemicelluloses that can be used in the production of various valueadded products. The anionic charges associated with these materials facilitate their interactions with cationic polymers. In this study, the influence of two cationic polymers, i.e., poly diallyldimethyl ammonium chloride (PDADMAC) and chitosan with two different molecular weights, on the flocculation and separation of lignocellulosic materials dissolved in PHL were discussed. The results showed that the maximum removals of 6％~10％ monomeric sugars, 25％ oligomeric sugars, 45％~60％ furfural, 10％~14％ acetic acid, and 20％~30％ lignin were obtained by adding less than 2 mg/g cationic polymers to the PHL. The changes in the turbidity of the PHL solution and the amount of cationic polymers in the flocculants were also investigated. These results imply that, by adding different dosages of cationic polymers to PHL, it was possible to obtain the floes that would possess different ratios of hemicelluloses to lignin.
PDADMAC biorefinery pre-hydrolysis liquor hemicelluloses lignin
Abrar Saeed Pedram Fatehi Yonghao Ni
Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
983-988
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）