Patent ID: 6146538
Filing Date: 2000-11-14
Classification: C02F

Abstract:
A method for inhibition of calcium based scale in and on components of an oxidizer feed system in a water treatment process comprising:providing an alkaline hypochlorite oxidizer;providing an alkali salt form of polymer selected from the group consisting of calcium polyepoxysuccinic acid (PESA), magnesium PESA, sodium PESA, potassium PESA, lithium PESA, calcium polymaleate, magnesium polymaleate, sodium polymaleate, potassium polymaleate, lithium polymaleate and mixtures thereof;determining carbonate alkalinity of a source of water to be treated;forming an oxidizer feed solution including said oxidizer, said polymer and said source of water;maintaining said oxidizer feed solution at a weight ratio of the alkali salt form of polymer to carbonate based alkalinity within the range of from about 0.1:1 to about 2:1; anddispensing said solution into said water treatment process;whereby effective scale inhibition is achieved in said oxidizer system at LSI values greater than 3.5.