- 作者: 青山政和 ; 陳振隆 ; Robert, Danielle
- 作者服務機構: Dept. of Wood and Paper Science, North Carolina State Univ., Raleigh, North Carolina, U.S.A.
- 中文摘要: Preliminary studies were conducted on the degradation of guaiacylglycerol-.beta.-aryl ether (.beta.-O-4'), phenylcoumaran (.beta.-5') and biphenyl (5-5') type lignin model compounds in the organic solvent systems such as ethanol-water (1:1, v/v) and 2-butanone-water (1:1, v/v), in the presence of a di- or trivalent inorganic salt to act as a Lewis acid in the temperature range 140-170.degree.C and with a reaction time up to 60 minutes. The inorganic salts investigated include aluminum chloride, aluminum sulfate, ferric chloride, ferric sulfate, and stannic chloride. The results indicate that lignin model compounds of both phenolic and non-phenolic .beta.-O-4' types are susceptible to degradation in organic solvent systems in the presence of one of these salts. Stannic chloride was found to be the most suitable catalyst for the degradation of .beta.-O-4' type lignin model compounds in the organic solvent systems. In contrast, lignin model compounds of .beta.-5' and 5-5' types did not undergo degradation under the same reaction conditions. A possible reaction mechanism for the degradation of .beta.-O-4' type lignin model compounds in organic solvent system in the presence of stannic chloride is discussed.
- 英文摘要: --
- 中文關鍵字: Lignin; Delignification; Organosol Process; Lewis Acid; Acid-Catalyzed Hydrolysis; Kinetics; Reaction Mechanism
- 英文關鍵字: 木質;去木質化;路易士酸;酸催化之水解;動力學;反應機構;有機溶膠程序