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石油最基本的成份是直链烷烃,其物化常数常常是生产和研究所不可缺少的。为此,进行了大量的物化数据的实验测定工作。但是,由于烷烃的异构物很多,要分离和制备各个烷烃的纯淨样品相当困难,因而,不少烷烃的物化数据仍然沒有进行实验测定。为了设计和研究的需要,不得不在已经测得的数据的基础上,采用经验的和半经验的方法,
The most basic component of petroleum is straight-chain alkanes, whose physicochemical constants are often indispensable for production and research. To this end, a large number of physical and chemical data of the experimental determination. However, due to the large number of isomers of paraffins, it is rather difficult to separate and prepare pure samples of individual paraffins. Therefore, the physico-chemical data of many paraffins have not yet been experimentally determined. In order to meet the needs of design and research, we must adopt the empirical and semi-empirical methods based on the measured data,