Preparation and Activation of Heteroatom Containing ACF

研究了AlCl3催化下由喹啉和异喹啉制备的含氮沥青的结构和性能。在相同的制备条件下，喹啉表现出较高的沥青产率、较高的软化点和较高的相对分子质量。在280ﾟC下反应4h后，喹啉沥青和异喹啉沥青均为各向同性，但在无AlCl3存在下，在380ﾟC下热处理6h后，喹啉沥青转变为中间相沥青。反之，异喹啉沥青不能生成中间相沥青。考虑到喹啉和异喹啉在萘环1位和2位上的不同氮离子，讨论了缩合机理。X射线衍射表明，喹啉沥青具有较大的流动范围和良好的石墨化能力，而异喹啉沥青产生各向同性焦炭，石墨化能力较差。在整个碳化过程中，脱氢过程非常相似，而碳化过程中的脱氮速率却有很大的不同。通过碳化过程中氮原子的行为和沥青性质的变化，研究了沥青的碳化过程。还考察了生产焦炭的碱度。

Structure and properties of nitrogen containing pitches prepared catalytically from quinoline and lsiquinoline by aid of AlCl_3 were studied. In spite of the same preparative conditions, quinoline exhibited higher pitch yield, slightly higher softening point and higher molecular weight. Both of quinoline and isoquinoline pitches which were prepared at 280ﾟC for 4hrs were isotropic, however quinoline pitch was converted to mesophase pitch after heat-treatment at 380ﾟC for 6hrs in absence of AlCl_3. On the contrary isoquinoline pitch could not produce mesophase pitch.The condensation mechanism is discussed by taking account of different nitrogen Iocation of uinoline and isoquinoline in the 1 or 2 position of the naphthalene ring.Quinoline and isoquinoline pitches were found to be carbonized to cokes of different optical textures. Quinoline pitch exhibited large flow domain and goo graphitizability which was measured by means of X-ray diffraction, whereas isoquinoline pitch produced isotropic cokes and poor graphitizability. Dehydrogenation was very similar all through the carbonization process, while the elimination rate of nitrogen was very different in the carbonization. The carbonization process was investigated in terms of behavior of nitrogen atom and changes of properties o pitches during the carbonization. The basicity of produced cokes was also examined.