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01540 Impact of Ammonium Chloride Salt Deposition on Refinery Operations

Product Number: 51300-01540-SG
ISBN: 01540 2001 CP
Author: Philip R. Petersen, Ph.D., Arthur de Jong, William F. Minyard, and John L. Sigmon
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Fouling and consequent underdeposit corrosion caused by ammonium salts, especially ammonium chloride, have serious impact on the reliability of operation of various process units. Fouling of tower trays can result in the loss of throughput, changes in the vapor pressure and endpoints of product streams, increased pressure drop in the tower, and corrosion of the trays. Salt deposition on heat exchanger tubes causes a decrease in heat transfer efficiency, increased pressure drops, and corrosion. This paper will discuss the causes of ammonium chloride fouling, methods to help prevent and/or mitigate the fouling, and provide several case histories demonstrating the effects of using ammonium chloride dispersants to clean existing ammonium chloride deposits and to help prevent deposition of this salt.
Fouling and consequent underdeposit corrosion caused by ammonium salts, especially ammonium chloride, have serious impact on the reliability of operation of various process units. Fouling of tower trays can result in the loss of throughput, changes in the vapor pressure and endpoints of product streams, increased pressure drop in the tower, and corrosion of the trays. Salt deposition on heat exchanger tubes causes a decrease in heat transfer efficiency, increased pressure drops, and corrosion. This paper will discuss the causes of ammonium chloride fouling, methods to help prevent and/or mitigate the fouling, and provide several case histories demonstrating the effects of using ammonium chloride dispersants to clean existing ammonium chloride deposits and to help prevent deposition of this salt.
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01543 DESIGN CONSIDERATIONS TO MINIMIZE AMMONIUM CHLORIDE CORROSION IN HYDROTREATER REAC'S

Product Number: 51300-01543-SG
ISBN: 01543 2001 CP
Author: Deyuan Fan, William Fort, Cathy Shargay, James Turner, Barry Messer
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