Technologies for the isolation of lignin from pulping process streams are reviewed in this article. Based on published data, the WestVaco process, the LignoBoost process, the LigoForce SystemTM and the SLRP process are reviewed and discussed for the isolation of lignin from Kraft black liquor. The three new processes that have now joined the WestVaco process are compared from the perspective of product quality. Further, isolation processes of lignosulfonates from spent sulfite liquor are reviewed. The limitation for this review is that data are only available from lab scale and pilot scale experiments and not from industrial processes. Key output of this paper is a technology summary of the state of the art processes for technical lignins, showing the pros and cons of each process.

中文翻译：

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对技术木质素分离过程的系统评价

本文综述了从制浆工艺流中分离木质素的技术。根据公开的数据，对WestVaco工艺，LignoBoost工艺，LigoForce SystemTM和SLRP工艺进行了审查和讨论，以从牛皮纸黑液中分离木质素。从产品质量的角度比较了现已加入WestVaco流程的三个新流程。此外，综述了从废亚硫酸盐溶液中分离木质素磺酸盐的方法。此审查的局限性在于，只能从实验室规模和中试规模的实验中获得数据，而不能从工业过程中获得数据。本文的主要输出是对技术木质素工艺的最新技术总结，显示了每种工艺的利弊。