Study on the structure of ammoxidative lignin
1998
Cao Ling | Quan Jinying | Li Zhongzheng(Nanjing Forestry Uni., Nanjing (China). Coll. of Chemical Engineering)
The structure of three kinds of ammoxidative lignosulfonate was studies by elementary analysis, GPC, FTIR and UV. The proper reaction mechanism based on investigation was provided. Results indicated that: molecular weights of products decreased; aromatic structure degraded partly; nitrogen contents increased and C/N ration decreased. Among three lignins (CaLs, SEP and CA), the nitrogen content of SFP increased, most N mainly exits in amine, amide and cyclic bonded nitrogen.
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