木质纤维预水解液糖组分分离及糠醛制备研究进展

Research Progress on the Separation of Sugar Components and Furfural Preparation from Wood Fiber Prehydrolysate

关键词:  预水解液  分离纯化  糠醛  高值化利用

Key Words:prehydrolysate  separation and purification  furfural  high value utilization

摘要:预水解液是使用预水解硫酸盐法制备溶解浆生产过程中产生的废液，含有大量的半纤维素和少量木质素。预水解液中的半纤维素可以通过生物质精炼技术制备糠醛等高附加值产品，而木质素的存在会严重阻碍糠醛的制备，因此实现高效制备糠醛的前提是预水解液的纯化，尤其是木质素的去除。本文对木质纤维预水解液的纯化方法及糠醛制备过程中收率的影响因素进行了综述，详细阐述了吸附法、膜过滤法和絮凝法在预水解液纯化中的应用，探讨了催化剂和反应体系对糠醛制备过程中收率的影响。

Abstract:The prehydrolysate is a waste liquid produced during the production of dissolved pulp via prehydrolyzed sulfate method， containing a large amount of hemicellulose and a small amount of lignin. The hemicellulose in the prehydrolysate can be prepared high value-added products such as furfural based on biomass refining technology， and the presence of lignin would seriously hinder the preparation of furfural. Thus the prerequisite for efficient preparation of furfural is the purification of the prehydrolysate， especially the removal of lignin. In this paper， the purification method of wood fiber prehydrolysate and the influencing factors of yield during furfural preparation were reviewed， the applications of adsorption method， membrane filtration method， and flocculation method in the purification of prehydrolysate were elaborated， and the effects of catalyst and reaction system on the yield during furfural preparation were discussed.