Chloride in A-Tower Residue

Have you analyzed desalted crude, atmospheric residue and hydrotreated stream for chloride content? I think you must close the overall chloride balance first.

Organic halides mostly go overhead in crude units, since they cannot be removed by desalting and later they undergo hydrolysis at elevated temperatures, resulting in higher HCL overhead content. They are usually lower molecular weight and originating from cleaning agents, so it would be quite strange to end up in long residue.

Use adequate laboratory test method (unfortunately, I cannot remember these at the moment), instead of most common conductivity test.






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If memory serves, Petreco and/or Tretolite....now Baker-Hughes....had a method for the determination of organic chlorides which typically pass untouched through the desalting process, but can be hydrolyzed to HCl at elevated temperature. You might contact these folk for some assistance.

Orenda