| CHARACTERISTICS OF LIGNIN REACTIONS IN SODA COOKING OF WHEAT STRAW PART 1 REACTION OF UNCONDENSED LIGNIN |
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| 引用本文： | Huamin Zhai College of Chemical Engineering,Nanjing Forestry University,Nanjing,China,210037 Yuanzong Lai Paper Science and Engineering Faculty,state University of New York,College of Environmental Science and Forestry,Syracuse,NY 13210 USA. CHARACTERISTICS OF LIGNIN REACTIONS IN SODA COOKING OF WHEAT STRAW PART 1 REACTION OF UNCONDENSED LIGNIN[J]. 天津科技大学学报, 2004, 19(Z2) |
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| 作者姓名： | Huamin Zhai College of Chemical Engineering Nanjing Forestry University Nanjing China 210037 Yuanzong Lai Paper Science and Engineering Faculty state University of New York College of Environmental Science and Forestry Syracuse NY 13210 USA |
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| 作者单位： | Huamin Zhai College of Chemical Engineering，Nanjing Forestry University，Nanjing，China，210037 Yuanzong Lai Paper Science and Engineering Faculty，state University of New York，College of Environmental Science and Forestry，Syracuse，NY 13210 USA |
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| 基金项目： | Inc，the US Department of Energy，the fok Ying Tung Education Foundation is Gratefully acknowledged |
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| 摘 要： | INTRODUCTIONWheatstrawisanimportantfiberrawmaterialinmanycountries熏particularlyinAsia熏EasternEurope熏andLatinAmerica熏whereareshortofwoodsuppliessuitableforthepurpose.Ithasbeenreportedthatnon-woodplantfiberswillplayanincreasingroleintheglobalpulpandpaperindustry熏andtheworldstrawproductionwasapproximately10熏000milliontonsin1998眼1演.ThelargestcapacityforproducingpulpfromthestrawisconcentratedinChina.IntheEuropeanCommunitythereisalsoagrowinginterestinthedevelopmentofnon-foodapplicati…
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| 关 键 词： | Wheat straw Alkaline cooking Lignin Ozone analysis β- O - 4 ether linkage Phenolic group |
CHARACTERISTICS OF LIGNIN REACTIONS IN SODA COOKING OF WHEAT STRAW-- PART 1 REACTION OF UNCONDENSED LIGNIN |
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| Huamin Zhai,Yuanzong Lai. CHARACTERISTICS OF LIGNIN REACTIONS IN SODA COOKING OF WHEAT STRAW-- PART 1 REACTION OF UNCONDENSED LIGNIN[J]. Journal of Tianjin University of Science & Technology, 2004, 19(Z2) |
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| Authors: | Huamin Zhai Yuanzong Lai |
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| Affiliation: | 1. College of Chemical Engineering, Nanjing Forestry University, Nanjing, China, 210037
2. Paper Science and Engineering Faculty, stateUniversity of New York, College of EnvironmentalScience and Forestry, Syracuse, NY 13210 USA |
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| Abstract: | Characteristics of uncondensed lignin reactions in soda cooking of wheat straw were studied. Mild and intense cooking conditions were used to get the pulp sample in which lignin was dissolved physically and the pulp sample in which lignin was dissolved chemically respectively. The pulp samples were analyzed by phenolic group determination, alkaline nitrobenzene oxidation and ozonation method. The results indicated that around 90% of lignin in wheat straw is alkali-soluble at the mild conditions, is basically dissolved physically without chemical change. The phenolic group content was not changed greatly, the nitrobenzene oxidation yield only changed slightly during the mild cooking. The phenolic group content was increased obviously and uncondensed lignin content was decreased very much when the intense cooking conditions were applied and the delignification was over 90%. The lignin structure was changed greatly during this period. |
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| Keywords: | Wheat straw Alkaline cooking Lignin Ozone analysis β- O - 4 ether linkage Phenolic group |
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