Patent ID: 9452941
Filing Date: 2016-09-27
CPC Classification: B08B,C01B,C01G,C11D

Claim Text:
1. A method for reducing the amount of iron sulfide in chemical process equipment containing deposits of iron sulfide, the method comprising: injecting steam containing a solution of sodium nitrite into the chemical process equipment; reacting the deposits of iron sulfide with the sodium nitrite; injecting a solution of lauryl dimethylamine oxide; monitoring the progress of the method by testing samples withdrawn from the chemical process equipment for the presence of lauryl dimethylamine oxide while continuing the injection of the solution of lauryl dimethylamine oxide; and, continuing the injection of steam containing a solution of sodium nitrite and a solution of lauryl dimethylamine oxide into the chemical process equipment until the lauryl dimethylamine oxide is no longer being consumed as indicated by the presence of unreduced lauryl dimethylamine oxide in the testing samples.