Organochlorine compounds
(OOCs) with a low boiling point in desalted
crude oil were identified via gas chromatography (GC) with electron
capture detection (ECD), and the possibility of their hydrolysis was
evaluated thermodynamically under the conditions of industrial distillation
of desalted crude oil. Six fractions, namely, gasoline, aviation kerosene,
light diesel, heavy diesel, lubricating oil, and residual oil, were
obtained via true boiling point distillation. Chlorine concentration
results indicated that OOCs with low and high boiling points were
concentrated in the gasoline fraction and residual oil, respectively.
Qualitative and quantitative analyses of low-boiling-point OOCs, such
as carbon tetrachloride, tetrachloroethylene, 1,1,1,3-tetrachloropropane,
and 1,2,4-trichlorobenzenem were performed via GC–ECD. The
four types of OOCs coexisted in the gasoline, aviation kerosene, and
light diesel fractions. Thermodynamic analysis results indicated that
the four types of OOCs could hydrolyze to form corrosive HCl during
industrial distillation of desalted crude oil. High-temperature and
low-pressure conditions will enhance the OOC hydrolysis.
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