Water treatment compositions

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C - Chemistry, Metallurgy

02

F

C02F 5/14 (2006.01) B01F 17/00 (2006.01) C07F 9/38 (2006.01) C11D 1/34 (2006.01) C23F 11/167 (2006.01)

Patent

CA 2205144

The reaction of a water soluble phosphite salt with a water soluble fumarate salt in aqueous solution and in the presence of a free radical initiator provides a synergistic mixture of a phosphonosuccinate with from 0.1 to 5% by weight of a salt of 1-phosphono-1,2,3,4-tetracarboxybutane, which mixture is superior to conventionally prepared phosphonosuccinates and to maleate/phosphite reaction products as a corrosion and scale inhibitor for aqueous systems and as a deflocculant and sequestrant.

Réaction d'un phosphite, sel hydrosoluble, avec un fumarate, autre sel hydrosoluble, dans une solution aqueuse, en présence d'un initiateur de type radical libre, donnant un mélange synergiste d'un phosphonosuccinate avec 0,1 à 5 % en poids d'un sel de 1-phosphono-1,2,3,4-tétracarboxybutane; ce mélange est supérieur comme agent antitartre pour systèmes aqueux et comme défloculant et séquestrant, aux phosphonosuccinates préparés par voie classique ainsi qu'aux produits de réaction de maléate/phosphite.

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