Use of chelating agents in water desalination

Details Use of chelating agents in water desalination Use of chelating agents in water desalination

C - Chemistry, Metallurgy

02

F

202/99, 182/15.3

C02F 1/04 (2006.01) C02F 5/10 (2006.01) C02F 5/12 (2006.01) C02F 5/14 (2006.01)

Patent

CA 1212349

USE OF CHELATING AGENTS IN WATER DESALINATION Abstract Processes for the desalination of saline water, especially seawater, which contains hardness ions (e.g. Ca2+ and Mg2+) and transition metal corrosion ions e.g. Fe3+), and in which an organic polymer antiscalant (e.g. a low molecular weight maleic acid- acrylamide-styrene terpolymer) is being used to control alkaline earth hardness, have been improved by adding a chelating agent to the saline water before, or at the same time as, adding the antiscalant. Typical chelating agents which can be used are citric acid, gluconic acid and hydroxyethylidenediphosphonic acid.

462208

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