工业木质素的氧化氨解改性研究  

Modification of technical lignin by ammoxidation

作　　者：全金英[1] 曹玲[1] 李忠正[1] 

机构地区：[1]南京林业大学,南京210037

出　　处：《纤维素科学与技术》1997年第4期39-47,共9页Journal of Cellulose Science and Technology

摘　　要：用氧化氨解方法对工业木质素进行改性，探讨了氧化氨解的最佳反应条件，并比较研究了三种不同的木质素磷酸盐的氧化氨解反应性能。制备出含氮量较高、C／N比较低的氧化氨解产品，具有很好的生物降解活性，可作为一种缓慢释放的氮资源应用于相应的领域，尤其是作为长效缓释氮肥具有很好的应用前景。N-medified lignins were synthesized by amnwhdation from technical lignosulfonates. The optimum reaction conditions were obtained by investigating the effects of reaction time, temperature, oxygen pressure, amount of axnia, addition method of reactants and firing speed on the amount of fixed nitroge and the CM ratio- The effects of raw materials on amrnkidation were also studied. The reactivity of three ligncouifonates (Cals,CA and SFP) towards ammxidation was comared. Results showed that they are all reactive. The tond nitrogen content of ou-OA, CAOA, SFP-OA are 20 .06%, 17 .85 %,23 .09% respectively. The CM raties are all less than 3. Amon thetn, SFP is the rnost suitable for ammoxidation because of its better reactivity and high nitrogen contents, especially organic nitreqen content.

关 键 词：工业木质素 木质素 磺酸盐 氧化 氨解 改性 

分 类 号：TQ351.377[化学工程] TQ351.013