造纸工业中的硫酸盐法制浆已有一百多年的历史了,至今仍占统治地位。蒸煮液为NaOH和Na_2S混合碱液,加热蒸解木片,游离出纤维素;木质素和醣类物质则转入碱液,在碱回收过程中以回收热能的方式燃烧掉。此法可获得强度好,价格低廉的纸浆,但现在正受到溶剂法制浆的挑战。最近,美国生物能公司和Battelle实验室两个研究机构发展了溶剂法制浆。与硫酸盐法制浆相比, Kraft pulping in the paper industry has been more than a century old and still dominates. The cooking liquor is a mixture of NaOH and Na 2 S lye, which is heated to distill the wood chips and free cellulose. The lignin and sugar substances are transferred to lye and burnt off by means of heat recovery in the alkali recovery process. This method yields strong, low-cost pulp but is now being challenged by solvent-based pulping. Recently, two research institutes, Biomass USA and Battelle Laboratories, developed solvent-based pulping. Compared with kraft pulping,