title: Catalytic conversion of carbohydrates to 5-hydroxymethylfurfural from the waste liquid of acid hydrolysis NCC.
abstract: The principal goal of this work was to reuse the carbohydrates and recycle sulfuric acid in the waste liquid of acid hydrolysis nanocrystalline cellulose (NCC). Therefore, in this work, the optimizations of further hydrolysis of waste liquid of acid hydrolysis NCC and catalytic conversion of L4 to 5-hydroxymethylfurfural (5-HMF) were studied. Sulfuric acid was separated by spiral wound diffusion dialysis (SWDD). The results revealed that cellulose can be hydrolyze to glucose absolutely under the condition of temperature 35 °C, 3 h, and sulfuric acid's concentration 62 wt%. And 78.3% sulfuric acid was recovered by SWDD. The yield of 5-HMF was highest in aqueous solution under the optimal condition was as follows, temperature 160 °C, 3 h, and sulfuric acid's concentration 12 wt%. Then the effect of biphasic solvent systems catalytic conversion and inorganic salt as additives were still examined. The results showed that both of them contributed to prepare 5-HMF. The yield and selectivity of 5-HMF was up to 21.0% and 31.4%, respectively.
authors.affiliation: Tianjin Key Laboratory of Pulping and Papermaking, Tianjin University of Science and Technology, Tianjin 300457, China.
authors.forename: Yonghui
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Tianjin Key Laboratory of Pulping and Papermaking, Tianjin University of Science and Technology, Tianjin 300457, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Pengtao
authors.initials: P
authors.lastname: Liu
authors.affiliation: Tianjin Key Laboratory of Pulping and Papermaking, Tianjin University of Science and Technology, Tianjin 300457, China. Electronic address: LIU_ZHONG00@126.com.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Liu
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000737:chemistry; D005947:Glucose / Q000737:chemistry*; D006868:Hydrolysis; D013464:Sulfuric Acids / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis*
chemical_list: D002482:Cellulose; D005662:Furaldehyde; D005947:Glucose; D013464:Sulfuric Acids; D062065:Wastewater; C008046:5-hydroxymethylfurfural; C033158:sulfuric acid; C109691:microcrystalline cellulose
keywords: 5-HMF; Biphasic system; Inorganic salt; NCC; Waste water