响应面法优化磷酸法酸析造纸黑液中的木质素

doi:10.3969/j.issn.1673-5854.2014.02.002

Abstract

Abstract: The process of recovering lignin from black liquor by phosphoric acid was studied. Based on single-factor experiments, three independent variables, i.e., acid extracting temperature, pH value and acid extracting time, were selected as influence factors and the Box-Behnken design (BBD) was used to optimize the preparation conditions of acid process. The optimal preparation conditions were determined as follows: pH value 2, temperature 46 ℃ and acid extracting time 50 min. Under these conditions, the lignin recovery was 190.60 g/L.

Key words: phosphoric acid, black liquor, response surface methodology

CLC Number:

TQ35

TAN Fei, LIN Yong-mei, WANG Su-mei, ZHENG Zhang-wei, HUANG Biao. Optimization of Lignin Extraction from Black Liquor by Phosphoric Acid Using Response Surface Methodology[J]. bce, 2014, 48(2): 8-12.

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Optimization of Lignin Extraction from Black Liquor by Phosphoric Acid Using Response Surface Methodology

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