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PURASPEC CLEAR Chloride guards

Chlorides in a refinery. Where does it come from? Chlorides are introduced into the refinery flowsheet in several ways. Some crude sources can bring both inorganic and organic chloride content. Desalter processes and chemical additives are used to remove chlorides and prevent corrosion and fouling caused by these chlorides. The other major source is from the Catalytic Reforming Unit (CRU). This unit upgrades straight run naphtha value for use in the gasoline pool or as petrochemical feedstock. Chlorides are injected onto CRU catalyst to attenuate acid function required to provide the best naphtha property enhancement. These chlorides are not permanently held on the catalyst and progress into the product streams, which are primarily hydrogen-rich offgases, stabilized naphtha, and LPG.

Why is it important?
Chlorides have significant effect on the integrity of refinery equipment, particularly around and downstream of the CRU. This is critical on the hydrogen-rich product as it is typically used as a key hydrogen feedstock for a number of high value units around the refinery. Two major issues come from not addressing chloride content in CRU product streams: corrosion and fouling.ed for RCl removal.

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