As the members of Chinese Group of the international cooperative project of “Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia”, the authors had the opportunity to review the recent achievement of r...As the members of Chinese Group of the international cooperative project of “Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia”, the authors had the opportunity to review the recent achievement of regional geology in this area. This paper is confined to a brief discussion of the nature, composition and evolution of terranes in a part of Northeast China. Nine terranes were recognized. A splicing pattern of when and how the amalgamation of 9 terranes into one microcontient is proposed here.展开更多
To investigate the green trinitration method of aromatic compounds, with Lewis acid/ionic liquid as catalyst and HNOJAc2O as nitration reagent, a Lewis acid/ionic liquid/HNO3/Ac2O system was established. In various co...To investigate the green trinitration method of aromatic compounds, with Lewis acid/ionic liquid as catalyst and HNOJAc2O as nitration reagent, a Lewis acid/ionic liquid/HNO3/Ac2O system was established. In various combinations of Lewis acids and ionic liquids, Bi(NO3)3-5H2O/[HMIM]CIO4 proved to be a very efficient catalyst for the trinitration of activated aromatic compounds and reusable for 3 times. Reaction conditions for the trinitration were optimized and yields of the trinitro products were from mild to excellent. This sulfuric acid-free system has the advantages of strong trinitration ability, low environment pollution, low toxicity, low cost and high potential for industrial application.展开更多
文摘As the members of Chinese Group of the international cooperative project of “Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia”, the authors had the opportunity to review the recent achievement of regional geology in this area. This paper is confined to a brief discussion of the nature, composition and evolution of terranes in a part of Northeast China. Nine terranes were recognized. A splicing pattern of when and how the amalgamation of 9 terranes into one microcontient is proposed here.
基金Supported by the National Natural Science Foundation of China(No.21376255).
文摘To investigate the green trinitration method of aromatic compounds, with Lewis acid/ionic liquid as catalyst and HNOJAc2O as nitration reagent, a Lewis acid/ionic liquid/HNO3/Ac2O system was established. In various combinations of Lewis acids and ionic liquids, Bi(NO3)3-5H2O/[HMIM]CIO4 proved to be a very efficient catalyst for the trinitration of activated aromatic compounds and reusable for 3 times. Reaction conditions for the trinitration were optimized and yields of the trinitro products were from mild to excellent. This sulfuric acid-free system has the advantages of strong trinitration ability, low environment pollution, low toxicity, low cost and high potential for industrial application.