Optimization of acetic acid recovery using tri-n-Alkylphosphine oxide from prepulping extract of hemicellulose by response surface methodology

被引：0
作者：
Kim S.J. [1 ]
Park S.-J. [2 ]
Um B.H. [1 ]
机构：
[1] Department of Chemical Engineering and Interagency Convergence Energy on New Biomass Industry, Hankyong National University, 327, Jungang-ro, Anseong, Gyeonggi-do
[2] Department of Bioresources and Rural Systems Engineering, Hankyong National University, 327, Jungang-ro, Anseong, Gyeonggi-do
来源：
Journal of the Korean Wood Science and Technology | 2016年 / 44卷 / 04期
关键词：
Acetic acid; Prepulping; Response surface methodology; Tri-n-Alkylphosphine oxide;
D O I：
10.5658/WOOD.2016.44.4.477
中图分类号：
学科分类号：
摘要：
A single process using hot water (0% green liquor) and green liquor (GL) was investigated for pre-pulping extraction on two types of raw material. The GL was applied at different alkali charges of 0-5% on a dry wood weight basis. The extractions were performed at an H-factor 900 at 180?. The 0% and 3% GL extraction detected acetic acid (AA) at 10.02 and 9.94 g/ℓ, extracts derived from hardwood, 2.46 and 3.76 g/ℓ, extracts derived from softwood, respectively. The single liquid-liquid extraction (LLE) was studied using tri-n-Alkylphosphine oxide (TAPO). Response surface methodology (RSM) was employed as an efficient approach for predictive model building and optimization of AA recovery conditions. The extraction of AA was evaluated with a three-level factorial design. Three independent variables, pH (0.5-3.5), temperature (25-65?), and residence time (24-48 min) were investigated. Applying the RSM models obtained, the optimal conditions selected of extracts derived from hard-And softwood with a 3% GL were approximately pH 1.4, 26.6?, 43.8 min and approximately pH 0.7, 25.2?, 24.6 min, respectively. The predicted and experimental values of AA recovery yield were similar whilst sugar retention was 100%.
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页码：477 / 493
页数：16
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