Preparation method of benzophenanthrene

The invention discloses a preparation method of benzophenanthrene, which is characterized in that fluorobenzene which is low in price and easy to obtain is used as a raw material, butyl lithium is subjected to hydrogen extraction to form lithium salt, sodium tert-butoxide is used for replacement to form sodium salt, then heating is performed, and benzophenanthrene is directly polymerized, and the preparation method is completed by adopting a one-pot method, is simple to operate, good in purity, high in yield and low in cost, and can be used for large-scale production. The method is used for solving the problem that large-scale industrialization is restricted in the prior art. 本发明公开了一种苯并菲的制备方法，以价格低廉且易得的氟苯为原料，在丁基锂拔氢成锂盐，用叔丁醇钠置换成钠盐后升温，直接聚合成苯并菲，采用一锅法完成，操作简单，纯度好，收率高，成本低，能大规模生产，用于解决现有技术中制约大规模产业化的问题。