It is shown that the fractional composition for heavy oils and gas oils of catalytic cracking can be estimated from the parameters of the optical absorption spectra. The characteristics of the normal distribution of the composition according to the true boiling point (TBP) curves were obtained by processing the experimental data using the Newton– Raphson optimization method. Relationships linking the average boiling points and the dispersion of the normal distribution law for the composition are established. The obtained relationships can be used to obtain initial estimates of the fractional composition of the feedstock and the efficiency of the fractionating columns of the refinery.

结果表明，催化裂化重油和瓦斯油的馏分组成可以通过光吸收光谱参数进行估算。通过使用 Newton-Raphson 优化方法处理实验数据，获得了根据真沸点 (TBP) 曲线的成分正态分布特征。建立了将平均沸点与组成的正态分布规律的分散联系起来的关系。所获得的关系可用于获得原料的分馏组成和炼油厂分馏塔效率的初始估计值。