Methods for reducing chlorine dioxide associated corrosion

Abstract

Methods for inhibiting chlorine dioxide associated corrosion in industrial equipment by treating industrial equipment (e.g., pipes, washers and other metallic, e.g., stainless steel surfaces) or process streams in contact with industrial equipment with one or more haloperoxidases, preferably, a chloroperoxidase, in an amount effective to reduce chlorine dioxide associated corrosion.

1 . A method for inhibiting chlorine-dioxide associated corrosion in an industrial process comprising contacting an industrial process stream comprising chlorine dioxide with one or more haloperoxidases in an amount effective to reduce the concentration of the chlorine dioxide. 
     
     
         2 . The method of  claim 1 , wherein said industrial process is a paper and pulp process. 
     
     
         3 . The method of  claim 1 , wherein said contacting is performed following a chlorine dioxide bleaching process. 
     
     
         4 . The method of  claim 1 , wherein said contacting is performed following a chlorine dioxide disinfectant process. 
     
     
         5 . The method of  claim 1 , wherein said one or more haloperoxidase is a chloroperoxidase. 
     
     
         6 . The method of  claim 5 , wherein said chloroperoxidase is obtained from  Streptomyces aureofaciens, Streptomyces lividans, Pseudomonas fluorescens, Caldariomyces fumago, Curvularia inaequalis  or  Corallina officinalis.    
     
     
         7 . The method of  claim 5 , wherein said chloroperoxidase is obtained from  Caldariomyces fumago.    
     
     
         8 . A method for inhibiting chlorine-dioxide associated corrosion in a pulp or paper process comprising contacting a process stream comprising chlorine dioxide with one or more haloperoxidases in an amount effective to reduce the concentration of the chlorine dioxide. 
     
     
         9 . The method of  claim 8 , wherein said contacting is performed following a chlorine dioxide bleaching process. 
     
     
         10 . The method of  claim 8 , wherein said one or more haloperoxidase is a chloroperoxidase. 
     
     
         11 . The method of  claim 8 , wherein said chloroperoxidase is obtained from  Streptomyces aureofaciens, Streptomyces lividans, Pseudomonas fluorescens, Caldariomyces fumago, Curvularia inaequalis  or  Corallina officinalis.    
     
     
         12 . The method of  claim 8 , wherein said chloroperoxidase is obtained from  Caldariomyces fumago.