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    30 September 2006, Volume 40 Issue 5 Previous Issue    Next Issue
    Effect of Heat Transfer Methods on Energy Efficiency of heating Room
    CAI Ming-yuan;JIANG Jian-chun;ZHOU Hao
    2006, 40 (5):  25-27. 
    Abstract ( 571 )   PDF (520KB) ( 575 )   Save
    The energy efficiencies of two heat transfer methods: immersion evaporation and falling film evaporation were compared. The results showed that although the evaporation intensity of falling film evaporation was two times higher than that of immersion evaporation, but in practice, if the heater was set up around the wall of heating room, the energy efficiency of immersion evaporation was about 57% higher than that of falling film evaporation.
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    Statement on Biomass Energy Standard System (Ⅱ) ——Biofuel Ethanol Standardization Progress
    LIU Jun-li;JIANG Jian-chun
    2006, 40 (5):  53-57. 
    Abstract ( 596 )   PDF (781KB) ( 866 )   Save
    Biomass energy is a renewable clean energy. Focusing on biomass energy products and according to their different physical states, the national standardization system of biomass energy is proposed in the course series on the basis of investigation of the international standardization of major products. The progress of biofuel ethanol standardization is reviewed in this paper. On the basis of analyzing the status of international fuel ethanol industry development, the typical standards of fuel ethanol in the world are introduced. The specifications of fuel ethanol from different countries are compared each other. The standardization study of China fuel ethanol products from non-edible raw material and wood cellulose should be enhanced according to the present situation of production and standardization of China fuel ethanol. The draft of fuel ethanol standards could be expedited by the way of adopting international standards.
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    Development of Forestry Biomass Energy Industry in Germany and Sweden
    JIANG Jian-chun;YING Hao;SUN Yun-juan
    2006, 40 (5):  31-36. 
    Abstract ( 815 )   PDF (1538KB) ( 736 )   Save
    The progress situation of policy, rule of law, technology research, development and industrialization about biomass thermochemical conversion in Europe Countries, such as Germany and Sweden,was introdured, according to investigation and information of technology situation in these conntries.
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    Study Situation of Forest Chemical Products Associated with Medical and Health Product
    GUO Xue-fei
    2006, 40 (5):  43-46. 
    Abstract ( 507 )   PDF (883KB) ( 679 )   Save
    This paper reviewed the study situation of several forest chemical products associated with medical and health products, such as sterols,paclitaxel,betulinic acid and hinokitol.
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    Research on the Synthesis of Perfume From Industrial Dipentene
    SUN Chong-lu;HUANG Ke-ying;CHEN Cong-jin;ZHANG Yan-qiang
    2006, 40 (5):  47-50. 
    Abstract ( 617 )   PDF (739KB) ( 854 )   Save
    This text overviewed current domestic and international progresses of the synthesis of perfume from industrial dipentene, which is produced as by-products in the synthesis of camphor or terpineol from turpentine.And it can help to find a more efficient way to utilize industrial dipentene.
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    The Technical Innovation of Multi-tube Furnace in Activated Carbon Production
    DU Jing-rong
    2006, 40 (5):  51-52. 
    Abstract ( 588 )   PDF (374KB) ( 612 )   Save
    The theory foundation and the unsolved problems of multi-tube furnace technical innovation in the process of wooden activated carbon production were introduced.The diameter of activation tubes was decreased. Some advices to improve the multi-tube furnace were given.
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    Supercritical CO2 Extraction of Polyphenol from the Husk of Earthnut
    SHI Li-li;LUO Jin-yue
    2006, 40 (5):  21-24. 
    Abstract ( 632 )   PDF (755KB) ( 793 )   Save
    The extraction and isolation conditions of polyphenol from the husk of earthnut by supercritical CO2 process were stu-died. Influences of extraction temperature, extraction pressure, and extraction time on the content of polyphenol were investigated, and suitable conditions were determined based on the single-factor tests. They were as follows: extraction temperature 60℃, extraction time 2 h, extraction pressure 20 MPa, 80% ethanol was used as a modifier, and its dosage was 4 mL for per gram material. The yield of polyphenol was 6.19% under above conditions.
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    Study on Catalytic Reaction for Preparation of High Purity Longifolene from Heavy Turpentine
    MI Shi-wu;FAN Fang
    2006, 40 (5):  28-30. 
    Abstract ( 680 )   PDF (630KB) ( 955 )   Save
    The products containing 80%, 85% and 90%(GC) of longifolene were made from semifinished longifolene products by catalytic reaction. The experiment result showed that the catalytic reaction can reduce the β-caryophyllene content of semifini-shed longifolene products which were obtained by rectification from heavy turpentine. The yield was 97.0%.
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    Adsorption Ability of Magnetic Bamboo Charcoal for Acid Red B
    PENG Yang-fei;CHEN Qing-song;LAI Shou-lian;LI Xiao-yan;LIN Wen-bing
    2006, 40 (5):  11-14. 
    Abstract ( 674 )   PDF (675KB) ( 641 )   Save
    The magnetic bamboo charcoal materials magnetized by MnFe2O4 and CuFe2O4 were prepared by chemistry-coprecipitation method. The adsorption ability of the materials for acid red B was studied. Results showed that:MnFe2O4-bamboo charcoal material (MnFe2O4-BC) and CuFe2O4-bamboo charcoal material (CuFe2O4-BC) possessed magnetism. CuFe2O4-BC has stronger adsorbability for acid red B. When the dosage of CuFe2O4-BC was 2 g/L and the initial concentration of acid red B was 150 mg/L, the adsorption velocity was fast and the removal of acid red B was 82% in the first 30 min. The adsorptive equilibrium reached at about 20 h. Saturation capacity was about 33 mg/g;the greatest adsorption of acid red B occurred at pH 4.5. the adsorption isotherm of acid red B accorded with the isothermal adsorption equations of Langmuir and Freundlich.
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    The Preparation and Homogeneity Examination of Simao Rosin Reference Materials
    WANG Zhen-hong;SONG Zhan-qian;SHANG Shi-bin;YE Bai-hui
    2006, 40 (5):  1-6. 
    Abstract ( 571 )   PDF (757KB) ( 973 )   Save
    Simao rosin reference materials were prepared from Pinus kesiya var. langbinanensis oleoresin. Rosin resin acid content was analyzed with GC quantitative analysis by using DB-5 capillary column. Statistical analysis was applied to homogeneity examination of standard reference materials.
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    Determination of the Hydroxyl Value of Lignin and Modified Lignin Resin
    WEI Min;YAN Li-nan;JIANG Jian-chun
    2006, 40 (5):  18-20. 
    Abstract ( 876 )   PDF (558KB) ( 791 )   Save
    Hydroxyl values of straw alkali lignin and modified lignin resin were determined by potentiometric titration in suitable composite acylation system. This kind of assay is a simple, quick and precise method with good repetition. It is also easy for practical use.
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    Study on Surface Chemistry Characteristics of Fines (Ⅰ) ——The Effects of pH Value in Wet-end System on Characteristics of Fines
    LIU Li-sha;DAI Hong-qi;WANG Shu-mei;YE Chun-hong
    2006, 40 (5):  7-10. 
    Abstract ( 706 )   PDF (635KB) ( 718 )   Save
    In this paper, the charge demand, beating degree, and water retention value (WRV) of fines including original (P200) and fiber fragment (P'200) which comes from KP bleached eucalyptus pulp are studied when they are affected by pH value. The results show that pH value affected the surface charge of fines, and had greatly effect to the beating degree and the WRV. When pH value raises from 4 to 10, the cationic demands of both P200 and P'200 increase respectively from 0.033 and 0.050 meq/g to 0.060 and 0.110 meq/g;the maximum anion demands of P200 and P'200 are respectively 0.014 and 0.010 meq/g. In the range of pH value 4~10, P200 and P'200 represent negative charge state. At pH neutral condition, the maximum CTR values of P200 and P'200 are respectively 0.4 and 0.2. The effect of pH value on beating degree of P200 is higher than that of P'200, and the effect of pH value on WRV of P200 is less, than that of P'200, P'200 has greater beginning beating degree and WRV.
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    Review on Dimethyl Ether Synthesis Technology
    CAI Fei-peng;LIN Le-teng;SUN Li
    2006, 40 (5):  37-42. 
    Abstract ( 602 )   PDF (1298KB) ( 803 )   Save
    The property and application of dimethyl ether(DME) were simply introduced. The technical routes of one-step method and two-step method were explained in detail. The characteristic of every technical route, technical research progress in DME production, and industrial application situtation were also introduced. The feasibility and the appropriate process route of DME synthesis from biomass were indicated.
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    Determination of Tannin Content of Valonea Tannin Extracts by Colloidal Titration
    DAI Li-jun;SU Xiao-bao;LU Yu-dong;CHEN Shao-ping;WU Zong-hua
    2006, 40 (5):  15-17. 
    Abstract ( 887 )   PDF (553KB) ( 798 )   Save
    Method of collidal titration was adopted to determine tannin content of valonea tannin extract. Tannin contents is correlated linearly with charge densities of the extract (expressed as titration value) in the mass range of tannin from 0.6 mg to 3.0 mg at pH 5. Average recoveries of samples XK-2 and XK-3 are 101.1% and 103.4% respectively, and relative standard deviations are 5.4% and 1.5% respectively. Compared with hide powder method, colloidal titration has the advantages of rapidity, simplicity,and low sample consumption.
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