Chloride Corrosion and Fouling In Catalytic Reformers With Naphtha Pretreaters

Abstract

A study was made of chloride corrosion and fouling occurring in low-temperature sections of catalytic reformer naphtha pretreaters. These problems were related to corrosion by aqueous HCl-H2S-NH3 solutions. Laboratory corrosion studies were made with these solutions to establish the effect of pH and composition in the presence or absence of an air atmosphere. Suppression of corrosion by ammonia neutralization and amine-type inhibitors also was studied. Elevated temperature tests were conducted in a nitrogen atmosphere. Field tests were made on six metals in a commercial pretreater reactor effluent stream. The removal of ammonium chloride fouling deposits was discussed briefly. 8.4.3, 4.3.2, 5.7.7, 3.3.2