玉米秸秆发酵残渣在多羟基醇中液化反应的研究

doi:10.3969/j.issn.0253-2417.2014.05.009

Abstract

Abstract: Fermentation residue of corn stover was liquefied in polyhydric alcohols in the presence of sulfuric acid as the catalyst at the temperature from 140 to 180 ℃. The liquefied product was used as polyol component for the preparation of rigid polyurethane foam. The results indicated that the highest yield of liquefaction was 64.54%, which was achieved in the mixed solvents of polyethylene 200 and glycol(mass ratio 7:3)with a liquid/solid mass ratio of 4:1, and a mass fraction of sulfuric acid 4 % at 160 ℃ after 2 h. The hydroxyl number and the viscosity of the liquefied product were 349 mg/g and 979 mPa·s, respectively. The benzene/ethanol extractives from fermentation residue was 96.59 % using the optimum reaction conditions. The liquefied product of the extractives, which has a hydroxyl number of 474 mg/g and a viscosity of 791 mPa·s, could be used for the preparation of rigid PU foam, too.

Key words: corn stover, fermentation residue, liquefaction, rigid polyurethane foam

CLC Number:

TQ35

WEI Bing, CHEN Fan-geng, LI Zhi-hao, CHENG Yuan-chao. Liquefaction of Fermentation Residue of Corn Stover in Polyhydric Alcohols[J]. Chemistry and Industry of Forest Products, 2014, 34(5): 53-59.

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Liquefaction of Fermentation Residue of Corn Stover in Polyhydric Alcohols

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