Composition for removing iron sulfide

Abstract

Provided is a composition for removing iron sulfide, containing, as an active ingredient, an α,β-unsaturated aldehyde represented by the following general formula (1): wherein R 1 to R 3 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R 1 may be connected to R 2 or R 3 , to constitute an alkylene group having 2 to 6 carbon atoms; and that R 1 and R 2 are not a hydrogen atom at the same time.

1 . A composition for removing iron sulfide, the composition comprising, as an active ingredient, an α,β-unsaturated aldehyde represented by formula (1): 
       
         
           
           
               
               
           
         
         wherein R 1  to R 3  each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R 1  is optionally connected to R 2  or R 3  to constitute an alkylene group having 2 to 6 carbon atoms and that R 1  and R 2  are not a hydrogen atom at the same time. 
       
     
     
         2 . The composition according to  claim 1 , wherein R 1  to R 3  are each independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms. 
     
     
         3 . The composition according to  claim 1 , wherein R 3  is a hydrogen atom. 
     
     
         4 . A method for removing iron sulfide, the method comprising
 contacting the composition of  claim 1  with iron sulfide.   
     
     
         5 . The method according to  claim 4 , wherein the α,β-unsaturated aldehyde in the composition is added in an amount of 0.1 to 100 parts by mass based on 1 part by mass of iron sulfide. 
     
     
         6 . The method according to  claim 4 , wherein said contacting occurs at a temperature of from −30° C. to 150° C. 
     
     
         7 . A method for removing iron sulfide, the method comprising
 removing iron sulfide using the composition according to  claim 1 .