Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
Bioresour Technol. 2011 Nov;102(21):10035-9. doi: 10.1016/j.biortech.2011.08.058. Epub 2011 Aug 22.
Dissolved lignocelluloses from the pre-hydrolysis liquor (PHL) of kraft-based dissolving pulp production process were recovered by adsorption to lime mud produced in the causticizing plant of the kraft process. The adsorption of lignocelluloses was a fast process, and could be completed within one hour. The addition of polydiallyldimethylammonium chloride (PDADMAC) significantly increased the amounts of adsorbed lignin and hemicelluloses, which more than doubled at the PDADMAC dosage of 0.1% (based on the weight of PHL). The measured heating values of the adsorbed lignocelluloses indicate that adsorption of lignocelluloses to lime mud may result in the energy saving of the lime kiln. The process proposed in this study could also be adapted to decrease inhibitor concentrations (lignin and acetic acid) if the dissolved hemicelluloses in the PHL were used to produce value-added products, e.g., ethanol, xylitol, based on the fermentation process.
从硫酸盐法制浆溶解浆生产过程的预水解液（PHL）中回收溶解的木质纤维素，方法是通过吸附到苛化工段产生的石灰泥中来实现。木质纤维素的吸附是一个快速的过程，可以在一个小时内完成。添加聚二烯丙基二甲基氯化铵（PDADMAC）显著增加了吸附木质素和半纤维素的量，在 PDADMAC 用量为 0.1%（基于 PHL 的重量）时，吸附量增加了一倍以上。测量吸附木质纤维素的发热值表明，木质纤维素吸附到石灰泥中可能导致石灰窑的节能。如果 PHL 中的溶解半纤维素用于生产附加值产品，例如基于发酵过程的乙醇、木糖醇等，则本研究中提出的工艺也可以适应降低抑制剂浓度（木质素和乙酸）。
