What is the typical level of chloride ions that should be controlled in the feed oil used for diesel and gasoline hydrogenation?
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Ammonium chloride crystallizes into ammonium salts at 230 degrees. What is the typical level of chloride ions that is controlled in crude oil? How can it be prevented?
Reply to 1# Heartthrob: Generally, the chlorine content in crude oil is very low, below 10 ppm; therefore, chloride ions in the hydroprocessing feedstock are usually not measured. High chlorine levels in crude oil are often the result of human addition, such as the use of chlorine-containing detergents
Not more than 1PPm, including water injection
Where does this data come from?
Design data, now relaxed to 1.5PPm
The chlorine content in the crude oil is not necessarily high; if it is high, salt formation will occur in the coking stabilization unit or the heavy catalytic stabilization unit. Chlorine is mostly introduced by hydrogen. In our plant, reforming hydrogen is used, and this hydrogen is dechlorinated before entering the plant using a low-temperature dechlorination tank, with very good results.