Studies on the Processing Conditions for Preparation of Polyol Using Beet Pulp

Abstract:

The catalyzed liquefaction degradation of beet pulp (BP) had been studied in the system of solid silicotungstic acid and polyethylene glycol 400 (PEG400)/glycerol (GLY), in which the solid silicotungstic acid served as the catalyst, and the latter was the complex liquefacient. This paper investigated the influence of processing conditions of BP liquefaction on the liquefaction reaction and the properties of liquefaction product. The results showed that BP had a good liquefaction effect, and the optimum liquefaction processing conditions were founded as follows: the weight ratio of PEG 400/glycerol was 4:1, the liquefaction temperature was 175oC, the catalyst amount was 8%wt, the solid-liquid weight ratio was 1:12, and the liquefaction time was 135 min. In these conditions, it was found that the best liquefaction rate would reach 99.5%, the hydroxyl and acid values of liquefaction mixtures were 52-82mg/g and 0.61-0.75mg/g respectively, the final products were lower hydroxyl value plant-based polyol.

• Periodical: Applied Mechanics and Materials (Volume 189)
• Pages: 7-11
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.189.7
• Online since: July 2012
• Authors: Xiao Lin Yan, Ke Bing Wang
• Keywords: Beet Pulp, Degradation, Liquefaction Reaction, Polyol, Silicotungstic Acid

References

[1] Yan Ning, Zhao Chen, Gan Weijia, et al. Polyols: a new generation of energy platform [J]. Chinese Journal of Catalysis, 2006, 27(12): 1159-1163.

[2] Akdeniz F, Gundogdu M. Direct and alkali medium liquefaction of Laurocerasus officinalis Roem [J]. Energy Conversion and Management, 2007, 48(1): 189-192.

DOI: 10.1016/j.enconman.2006.04.018

[3] Xu Chunbao, Timothy Etcheverry. Hydro-liquefaction of woody biomass in sub and supercritical ethanol with iron based catalysts [J]. Fuel, 2008, 87(3): 335-345.

DOI: 10.1016/j.fuel.2007.05.013

[4] Pang Hao, Liu Yusheng, Liao Bing, et al. Study on Preparation of Rigid Polyurethane Foam from Bagasse Polyol[J]. Chemistry and Induatry of Forest Products, 2006, 26(2): 57-60.

[5] Zhang Jinping, Du Menghao, Wang Jingwen, et al. Liquefaction of phyllostachys edulis(carr. ) lehaie powderin polyhydric alcohol and analysis of reaction products[J]. Journal of Cellulose Science and Technology, 2010, 18(2): 15-21.

[6] Ge Jinjie, Zhang Zhinan, Xu Jiangtao. Studies on the environmentally safe materials based on corn-cob (I)The liquefaction of corn-cob and preparation of biomass polyol [J]. Polymer Materials Science & Engineering, 2003, 19(3): 194-197.

[7] Wang Gaosheng, Zhang Jihong, Chen Fushang, et al. Study on the polyhydric alcohol liquefaction of corn stalk[J]. Biomass Chemical Engineering, 2007, 41(7): 14-18. (in Chinese with English abstract).

[8] Chen Qiuling, Li Ruyan, Sun Kewei, et al. Research on liquefaction of wheat straw for polyurethane polyol [J]. Polymer Bulletin, 2009, 7(11): 37-43.

[9] Kurimoto Y, Doi S, Tamura Y. Special effects on wood-liquefaction in polyhydric alcohols[J]. Holzforschung, 1999, 53(6): 617-622.

DOI: 10.1515/hf.1999.102

[10] Rodrigo Briones, Luis Serrano, Rached Ben Younes, et al. Polyol production by chemical modification of date seeds [J]. Industrial Crops and Products, 34 (2011) 1035– 1040.

DOI: 10.1016/j.indcrop.2011.03.012

[11] Renard C M, Thibault J F. Structure and properties of apple and sugarbeet pectins extracted by Chelating Agents[J]. Carbohydrate Research, 1993, 244(1): 99-114.

DOI: 10.1016/0008-6215(93)80007-2

[12] Guillon F, Thibauh J F. Oxidative cross—linking of chemically and enzymatically modified sugar-beet pectin [J]. Carbohydrate Polymers, 1990, 12(4): 353-374.

DOI: 10.1016/0144-8617(90)90087-9

[13] Yao Y G, Yoshioka M, Shiraishi N, et a1. Rigid polyurethane foams from combined liquefaction mixtures of wood and starch [J]. Mokuzai Gakkaishi, 1995, 41(7): 659-668.

[14] Kurimoto Y, Shirakawa K, Yoshioka M, et a1. Chemical Modification of Lignocellulosics [C]. New Zealand, 1992, 163-l72.

[15] Kobayashi M, Asano T, Kajiyama M, et a1. Combined liquefaction of wood and starch in a polyethylene glycol glycerin blended solvent [J]. Jpn Wood Res Soc, 2004, 50(5): 407-414.

[16] Lee W J, Lin M S. Preparation and application of polyurethane adhesives made from polyhydric alcohol liquefied Taiwan acacia and China fir [J]. Journal of Applied Polymer Science, 2008, 109(1): 23-31.

DOI: 10.1002/app.28007