47  5,744,649  48  * *  *  *  *  20.  The  process  of  claim  19  wherein  the  organic  nitrogen  compound  is  benzimidazole  or  benzotriazole.  19.  The  process  of  claim  18  wherein  the  organic  nitrogen  compound  is  selected  from  the  group  consisting  of  diazoles,  triazoles,  diazines  and  triazines.  sion  products  of  the  reaction  between  said  phosphorus  acidic  compound  and  said  organic  nitrogen  compound  are  also  removed  by  the  water  treatment.  18.  The  process  of  claim  4  wherein  phosphorus  acidic  compounds  present  in  the  reaction  product  fluid  are  scav› enged  by  an  organic  nitrogen  compound  that  is  also  present  in  said  reaction  product  fluid  and  wherein  at  least  some  amount  of  the  phosphorus  acidic  compound  of  the  conver- different  and  represents  a  substituted  or  unsubstituted  monovalent  hydrocarbon  radical  containing  from  1 to  24  carbon  atoms,  a  and  b  can  be  the  same  or  different  and  each  have  a  value  of  O to  6,  with  the  proviso  that  the  sum  of  a+b  is  2 to  6  and  n  equals  a+b. 