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›› 2008, Vol. 28 ›› Issue (04): 93-98.

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Study on Treatment of Auto-catalyzed Ethanol-water Pulping Waste Liquor of Aspen by Distillation-ultrafiltration

CUI Xin, ZHOU Jing-hui, YANG Rui-feng   

  1. College of Chemistry and Material, Dalian Polytechnic University;Liaoning Province Key Laboratory of Pulp and Paper Engineering, Dalian 116034, China
  • Received:2007-08-23 Revised:1900-01-01 Online:2008-08-30 Published:2008-08-30

Abstract: The waste liquor of auto-catalyzed ethanol-water pulping of aspen had complex components and high value of by products. Ethanol and lignin products were separated from waste liquor by distillation-ultrafiltration in order to reduce degree of waste liquor pollution markedly. The effects of different factors on the process of separation were studied to confirm optimal technical conditions. The results showed that the optimal conditions were: volume ratio of concentration 0.5, Mr of interception 10000, pressure 0.20MPa, stirring rate 600 r/min, temperature 30 ℃. This method could recover useful components effectively and reduce degree of waste liquor pollution markedly.

Key words: auto-catalyzed ethanol-water pulping of aspen, ultra-filtration, contamination resistance, retain rate

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