EXTRACTION OF HARDWOOD BIOMASS USING DILUTE ALKALI, 2011 PEERS Conference

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The “near neutral hemicellulose extraction process” involves the extraction of wood hemicellulose using green liquor prior to conventional kraft pulping. The objective of this work was to develop correlations that could be used in process design and economic studies. Experimental data are presented for the extraction of northeast hardwood chips using green liquor. The effect of green liquor application rate, liquor-to-wood ratio and H-factor on the removal of sugars and organic acids are discussed. Empirical correlations are developed that embody green liquor application rate (GL), liquor-to-wood ratio (L/W) and the H-factor (H).