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4579415 
Journal Article 
Flocculation Process of PEO for Lignin Removal from Pre-hydrolysis Liquor of Mixed Hardwood 
Liu, G; Shi, H; Ping, Q; Zhang, J; Li, Na; Niu, M 
2013 
Yes 
Advanced Materials Research
ISSN: 1022-6680 
Trans Tech Publications Ltd 
Guilin, PEOPLES R CHINA 
Advanced Materials Research 
726-731 
1859-1862 
English 
WOS:000333767500372 
To isolate lignin of PHL, PEO with various molecular weights (MW)s were added to PHL under different process conditions, and the turbidity and size of complexes formed in the PHL, as well as the lignin, hemicelluloses (sugar) and chemical oxygen demand (COD) of PHL were assessed after PEO treatments. Alternatively, poly aluminum chloride (PAC) (200 mg/l) and PEO (8 MDa MW) (200 mg/l) were employed in a dual polymer system to extract the lignin of NIL In this work, the maximum removals of 46% lignin, 18.8% sugars, and 32% COD were obtained under the conditions of 400 mg/g PEO (with a MW of 8 MDa) at pH 2 and room temperature in a singular PEO polymer system. 
poly ethylene oxide; pre-hydrolysis liquor; lignin; flocculation; hemicelluloses; COD.. 
Paper Engn, Dalian Peoples R. China