Patent ID: 9334182
Filing Date: 2016-05-10
CPC Classification: C02F

Claim Text:
1. A method for preventing the generation of, and/or removing hydrogen sulfide and/or sulfhydryl compounds and their corrosion products, including iron sulfide, in an industrial process fluid or system, which comprises adding to the industrial process fluid or system an effective amount of a composition comprising: (i) at least one aldehyde or aldehyde donor that is not a triazine (ii) the reaction product of a hydroxymethylphosphine or hydroxymethylphosphonium compound and an amino acid and, optionally, (iii) a quaternary ammonium or N-hydrogen compound or mixture thereof, wherein the hydroxymethylphosphine or hydroxymethylphosphonium compound and the amino acid are in a molar ratio of 1:1 to 1:12, and wherein the molar ratio of the aldehyde or aldehyde donor to the reaction product of the hydroxymethylphosphine or hydroxymethylphosphonium compound and the amino acid is from 0.02:1 to 100:1.