Removing iron-, manganese- and calcareous deposits in drinking water distribution systems, comprises treating deposits with an aqueous cleaning solution comprising a reducing agent, preferably phosphinic acid or oxalic acid, or their salt

摘要

Removing iron-, manganese- and calcareous deposits in drinking water distribution systems, comprises treating the deposits with an aqueous cleaning solution comprising a reducing agent, preferably phosphinic acid or oxalic acid, or their salt. Independent claims are also included for a dry powder mixture for producing the aqueous cleaning solution comprising a powdered reducing agent, preferably phosphinic acid or oxalic acid, or their salt and a powdered complexing agent.