Optimization of Paulownia Fortunei L. Autohydrolysis-Organosolv Pulping as a Source of Xylooligomers and Cellulose Pulp
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- 作者：S. Caparró ; s ; J. Ariza ; G. Garrote ; F. Ló ; pez ; M. J. Dí ; az
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2007
- 出版时间：January 17, 2007
- 年：2007
- 卷：46
- 期：2
- 页码：623 - 631
- 全文大小：500K
- 年卷期：v.46,no.2(January 17, 2007)
- ISSN：1520-5045
文摘
This paper will consider the influence of the autohydrolysis pretreatment on Paulownia fortunei L. woods toobtain a liquid phase (which can be used as a commercial source of organic reagents) and also a solid phase(which is valuable as raw material for pulping processes). Moreover, the influence of the operating conditions-viz., ethanol concentration (20%-60%), temperature (150-180 
C), and pulping time (30-90 min)-on theorganosolv pulping (the initial liquor-to-solid ratio was 8:1, with 10% of soda and 0.5% of anthraquinone) ofthe obtained Paulownia fortunei L. solid after the autohydrolysis process has been considered to determinethe best pulping conditions and characteristics of the solid phase. In that form, the yield, kappa number,glucan and lignin contents, and tensile index values of the resulting pulps and paper sheets have been studied.The optimum of solubilized components has been obtained at 190 C (0.92 g/L glucose, 1.61 g/L xylose,0.60 g/L arabinose, 0.93 g/L acetic acid, 0.047 g/L 5-hydroxymethylfurfural, 0.141 g/L furfural, and 14.66g/L oligomers). Under these conditions, a suitable chemical composition of pulps and acceptable yield (38%),kappa number (45), and tensile index (28.87 N m/g) could be obtained through operation at high temperature(180 C), short pulping time (30 min), and low ethanol concentration (20%).
C), and pulping time (30-90 min)-on theorganosolv pulping (the initial liquor-to-solid ratio was 8:1, with 10% of soda and 0.5% of anthraquinone) ofthe obtained Paulownia fortunei L. solid after the autohydrolysis process has been considered to determinethe best pulping conditions and characteristics of the solid phase. In that form, the yield, kappa number,glucan and lignin contents, and tensile index values of the resulting pulps and paper sheets have been studied.The optimum of solubilized components has been obtained at 190 C (0.92 g/L glucose, 1.61 g/L xylose,0.60 g/L arabinose, 0.93 g/L acetic acid, 0.047 g/L 5-hydroxymethylfurfural, 0.141 g/L furfural, and 14.66g/L oligomers). Under these conditions, a suitable chemical composition of pulps and acceptable yield (38%),kappa number (45), and tensile index (28.87 N m/g) could be obtained through operation at high temperature(180 C), short pulping time (30 min), and low ethanol concentration (20%).