... a continuous water wash upstream of the reactor effluent air cooler (REAC) to mitigate corrosion and fouling from ammonium chloride and/or bisulfide salts. In an informal survey of low severity hydroprocessing units, the water washing practices were inconsistent and the trends showed no relationship...

... of hydroprocessing water wash best practices and addresses both design and operational issues by using state-of-the-art process engineering and corrosion prediction models. The goal is to develop cost-effective and robust solutions to reliability problems in reactor effluent air coolers and associated piping...

... Locations within Hydrotreater Units In general, ammonium chloride deposits tend to collect upstream of the water wash injection point(s) in the colder areas in equipment and piping. Heat exchanger tubing, piping deadlegs, vent piping, level gauge piping, etc., are the usual areas of concern...

... discussed along with measures for their mitigation. amines alkanolamine gas treating corrosion erosion cyanide water wash ammonium polysulfide acid gases SSC HIC SOHIC ASCC ammonium bisulfide chloride heat stable salts INTRODUCTION Refinery amine units must be designed to overcome...

... on the efficacy of the water wash/water soluble chemicals approach to corrosion control are discussed. The limitations that this conclusion puts on the ability to predict the initial dewpoint conditions are also identified. Finally, these findings are used to explain why the loss of crude preheat, which...