| 摘要 |
The invention provides for the use of a copolymer, comprising
a) 0.1 to 10 mol-%, based on the weight of the copolymer, of structural units derived from vinylphosphonic acid or of a salt thereof,
b) 40 to 80 mol-%, based on the weight of the copolymer, of structural units
derived from compounds of the formula (1)
c) 1 to 50 mol-%, based on the weight of the copolymer, of structural units derived from compounds of the formula (5)
in which X is OH or NR 3 R 4 , and R 3 and R 4 , independently of one another, are H or C 1 -C 4 -alkyl,
for the inhibition and/or dispersion of inorganic sulphide scales, and for a process for the inhibition and/or dispersion of inorganic sulphide scales, the process comprising adding to water being within an oil or gas containing formation said copolymer. |
