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在许多减压渣油和重质油中都含有迫位缩合芳烃结构。本文就迫位缩合芳烃体系中的各种碳之间的数量关系予以讨论。 迫位缩合芳烃体系中的芳香碳按其相邻原子的差异可分为两种情形。一种是与另外两个芳香碳和一个氢原子直接相联结的碳原子,称之为缩合芳烃体系的外碳(本文简称外碳),用C_?表示;另一种则是与其它三个芳香碳相联结的碳原子,称之为缩合芳烃体系的内碳(本文简称内碳),用C_I表示。在总环数一定时,无论环间排列方式如何变化,其内碳数不变
In many vacuum residue and heavy oil contains a condensed aromatic structure. This paper discusses the quantitative relationship between the various carbons in the condensed aromatic hydrocarbon system. The aromatic carbons in the condensed aromatic hydrocarbon system can be divided into two cases according to the difference of adjacent atoms. One is with two other aromatic carbon and a hydrogen atom directly linked to the carbon atoms, called the condensation of aromatics outside the system of carbon (referred to as the outer carbon), with C_? That the other is with the other three Aromatic carbon linked carbon atoms, called the condensation of aromatics system of carbon (referred to as the carbon inside), with C_I said. When the total number of rings is constant, the number of carbons in the ring will not change, no matter how the arrangement of rings is changed