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Table of Content

    30 November 2012, Volume 46 Issue 6 Previous Issue    Next Issue
    The Preparation and Applications of the Environmentally-friendly Plasticizer DOTP
    CHANG Xia;NIE Xiao-an;CHEN Jie;GAO Yi-wei;LIU Qian;XU Bing
    2012, 46 (6):  1-6. 
    Abstract ( 1390 )   PDF (979KB) ( 3722 )   Save
    We studied the synthesis of plasticizer DOTP using mixed PTA and PTA waste as raw materials along with compound catalyst. After comparing the effects of different reaction conditions, the optimum synthetic conditions were obtained as follows: the molar ratio 2.4:1, the amount of catalyst 0.3%, reaction time 6 h, reaction temperature 220℃; the decolourization dosage 5%, temperature 80℃, time 1 h. Under this condition, the yielded product had the volume resistivity of ≥ 9.0×1011Ω·cm. GC-MS analysis showed that phthalate dioctyl content was up to 95.94%. Compared with DOP, the product has excellent performance, higher heat resistance and more economic benefits.
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    Improvement of Polymerization Process of Turpentine and Preparation of High-quality Terpene Resin
    WANG Jing;ZHAO Zhen-dong;LI Dong-mei;LU Yan-ju;CHEN Yu-xiang;BI Liang-wu;GU Yan;
    2012, 46 (6):  7-11. 
    Abstract ( 821 )   PDF (993KB) ( 1153 )   Save
    To reduce the contents of catalysts remaining in terpene resin produced by the traditional method, a primary improvement for its preparation process was put forward, i.e., SbCl3, a kind of Lewis acids with high toxicity as the co-catalyst in the reaction, was replaced by TMCS. The new process has been proved that it had a remarkable effect on decreasing the residual quantity of catalysts. The obtained products usually have excellent quality and the contents of chlorine and aluminum in it are lower than 100 mg/kg and 5 mg/kg respectively. There is no antimony existing in them. It is considered that terpene resins from new process could serve as food additives according to FDA standard.
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    Optimization of Ultrasonic-assisted Extraction of Tannic Acid from Chinese Gallnut Using Response Surface Method
    ZHANG Zong-he;MIN Fan-qin;QIN Qing;XU Hao;LI Wen-jun;WANG Cheng-zhang;
    2012, 46 (6):  12-16. 
    Abstract ( 717 )   PDF (1240KB) ( 1652 )   Save
    The ultrasonic-assisted extraction of tannic acid from Chinese gallnut with water as extraction agent were determined on the basis of single factor experiment using response surface method (RSM). According to central composite (Box-Behnken) design principle, the effect of three independent variables on the yield of tannic acid, namely liquid to solid ratio, ultrasonic extraction time, and ultrasonic power was investigated. The results showed the optimum ultrasonic-assisted extraction conditions were: 5 g of Chinese gallnut powder, liquid to solid ratio 38:1 (mL:g), ultrasonic extraction time 32 min, ultrasonic power 250 W. Under the optimum conditions, the extraction yield of tannic acid was 66.0%.
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    The Preliminary Study on Plant Gum from Machilus pauhoi Kanehira
    HE Hong-cheng;DENG La-yun;ZENG Jie-fan
    2012, 46 (6):  17-20. 
    Abstract ( 863 )   PDF (910KB) ( 1298 )   Save
    This article mainly presents the processing procedure of Machilus pauhoi Kanehira plant gum, the mechanism of Machilus pauhoi Kanehira plant gum used for drilling fluid additive, and the experiments on viscosity and stability in different parameters of mass fraction, temperature, mineralization and time. It concluded that the viscosity increases greatly with increasing mass fraction, the viscosity decreases gradually with increasing temperature, the viscosity decreases smoothly as time goes on, and the viscosity decreases with increasing mineralization.
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    Preliminary Study on Preparation of Emulsion Bamboo Cellulose-acrylate Pressure-sensitive Adhesive
    ZHOU Jian-zhong;YU Li-yan;MA Hai-jie;KE Da-wei;GUO Ming
    2012, 46 (6):  21-24. 
    Abstract ( 904 )   PDF (843KB) ( 1229 )   Save
    Using bamboo cellulose as raw materials, bamboo cellulose-acrylate emulsion pressure-sensitive adhesive was synthetized by semi-continuous emulsion polymerization method. The results showed that: when the polymerization system temperature 85℃, stirring rate 150 r/min, the hard and soft monomer ratio 4:1, hard monomers methacrylic acid:vinyl acetate 1:4, initiator dosage 0.30%, adding 0.6% of the total mass fraction of bamboo cellulose and reaction time of 3h were used, good performance pressure-sensitive adhesive with viscosity of 21.3 mPa·s, the peel strength of 0.692 N/mm could be obtained, The results provide a useful reference for the new bamboo cellulose matrix pressure-sensitive adhesive.
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    Effects of Ultrasound Parameters on the Stability of Lignocellulosic Bio-diesel Fuel
    WEI Xiao-li;WANG Shu-yang;WANG Zhuo
    2012, 46 (6):  25-29. 
    Abstract ( 908 )   PDF (1171KB) ( 1395 )   Save
    According to the request of the experiment, the variable frequency controlled waveform ultrasonic emulsification device was designed. Optimal operating parameters of ultrasonic generator were studied by orthogonal experiment. The preparation conditions of the emulsified liquid were: HLB=5, dosage of emulsifiers 3%, addition of bio-oil 20%, 0# diesel 80%, methanol used as auxiliary emulsifier, and emulsifying temperature at the room temperature. 40 mL of emulsified liquid was added to the variable frequency controlled waveform ultrasonic emulsification device to emulsify. According to the results, treating time had the most significant influence on the stability, followed by power, frequency, and waveform. The optimal operating parameter was power of 30 W, frequency of 25 kHz, treating time of 8 min and waveform of square wave pulse. The emulsification stability under these conditions was the best and the setting time was 2 256 h.
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    Synthesis of (+)-2-Hydroxy-3-Pinanone from (-)-α-Pinene by Selective Oxidation
    LIU Bing;BI Zhong-bao;WANG Shi-fa
    2012, 46 (6):  30-34. 
    Abstract ( 702 )   PDF (893KB) ( 993 )   Save
    (+)-2-hydroxy-3-pinanone was synthesized through selective oxidation from (-)-α-pinene. The synthetic technology was studied and affecting factors such as different oxidation systems, amount of oxidant, reaction time and temperature were investigated. The results showed that the suitable synthetic technology of (+)-2-hydroxy-3-pinanone from (-)-α-pinene were as follows: 13.7 g α-pinene (93.0% purity),α-pinene/KMnO4 molar ratio 1:2, acetone and water used as the solvent at ratio of 110:12(mL:mL), reaction temperature 0~5℃ and reaction time 5 h. Under these conditions, the conversion of α-pinene was 97.1%, selectivity of oxidation was 78.4%, purity and yield of the product were 92.1% and 76.1%, respectively; specific rotation [α]D25+26°(c=0.5 mol/L, CHCl3). The structure of (+)-2-hydroxy-3-pinanone was determined by IR, GC-MS and 1HNMR, 13CNMR spectra.
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    Research and Application of Lignin-based Dye Dispersants
    BAI Meng-xian;QIN Yan-lin;YANG Dong-jie
    2012, 46 (6):  35-39. 
    Abstract ( 997 )   PDF (902KB) ( 4110 )   Save
    The development situation of dye dispersant is introduced. After a review of the relationship of structure and perfor-mance of lignosulfonates, the problems of lignosulfonatestype used in dyeing and printing industry are analyzed. The main research contents are summarized. Some suggestions for the development and industrial applications of the lignin-based dye dispersants are given.
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    Research Progress of the Conversion of Agricultural Residue into Energy and High-value Chemicals
    LI Hui-ling;REN Jun-li;WANG Shuai-yang;SUN Run-cang
    2012, 46 (6):  55-60. 
    Abstract ( 902 )   PDF (969KB) ( 1574 )   Save
    Based on introduction of the major components and content of agricultural residue biomass, this article briefly described the recent development in the conversion of celluloses, hemicelluloses and lignin as the main components in the cell wall of agricultural residue biomass into bioenergy such as ethanol, acetone and high-value chemicals such as furfural and furans. Furthermore, the problems in the conversion of biomass into bioenergy and high value-added chemicals were pointed out. The future development was brought forward, as well.
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    Research Progress on Development and Utilization of Value-added Chemicals from Forestry Biomass
    CHEN Qiang;HUANG Ping;LUO Yan-qing;WANG Yan;MA Sha;KONG Ling-xi
    2012, 46 (6):  40-46. 
    Abstract ( 764 )   PDF (1085KB) ( 2036 )   Save
    Biomass has been recognized as a sustainable replacement of petroleum sources for production of high value added chemical products in recent years. In this paper, the research advances in the major components and conversion methods of forestry biomass were summarized. Current status of development and utilization of starch, wood and triglyceride materials was introduced. At last, the prospect of developing value-added chemicals from forestry biomass is pointed out.
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    Research Progress of Nonisocyanate Polyurethane-Novel Environmental-friendly Polyurethane
    CHEN Cai-feng;LIU Gui-feng;KONG Zhen-wu;WU Guo-min;
    2012, 46 (6):  47-54. 
    Abstract ( 853 )   PDF (982KB) ( 1777 )   Save
    Nonisocyanate polyurethane (NIPU) is a novel environmental friendly polyurethane which was prepared from cyclic carbonates oligomer reaction with amino-oligomer. The synthesis principle of nonisocyanate polyurethane was introduced. The technology progress on preparation methods and applications of cyclic carbonates and their oligomer, linear NIPU, hybrid NIPU and modificated NIPU was also reviewed.
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