METHODS OF REMOVING CALCIUM MATERIAL FROM A SUBSTRATE OR CATALYTIC CONVERTER

摘要

Methods of removing or softening calcium material from a substrate (e.g., a catalytic converter) and regenerating a catalytic converter are provided. A substrate (e.g., a catalyst support material) having a calcium containing material (e.g., calcium-containing fly ash) embedded or deposited thereon can be treated with a composition including one or more organosulfur oxoacids or salts thereof.

主权项

1. A method of softening or removing a calcium material from a substrate, comprising:
a. providing a substrate comprising a catalytic converter, said catalytic converter including the calcium material deposited directly or indirectly on at least a portion of the catalytic converter; b. treating the catalytic converter with a treatment composition comprising at least one organosulfur oxoacid or salt thereof.