Gas oil desalting reduces chlorides in crude

A new atmospheric gas oil (AGO) electrical-desalting process reduced the amount of chlorides in the main fractionator of a Chinese fluid-catalytic cracking unit (FCCU). Although desalting the crude before it enters the crude-distillation unit (CDU) removes some chlorides, the Sinopec Luoyang, China, petrochemical complex (LPC) found that adding a desalting step to the AGO improves FCCU operations.Chloride problemsChlorides in crude oil form areas of salt accumulation in processing units. These areas of accumulation seriously corrode key equipment, especially those that run in the low-temperature ranges in which hydrogen chloride forms.The conventional method of removing chlorides is a com...

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