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. 

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- 

sion products of the reaction between said phosphorus acidic compound and said organic nitrogen compound are also removed by the water treatment. 

19. The process of claim 18 wherein the organic nitrogen compound is selected from the group consisting of diazoles, triazoles, diazines and triazines. nitrogen 

20. The process of claim 19 wherein the organic compound is benzimidazole or benzotriazole. 

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