Inhibition of silica and silicate deposition

Details Inhibition of silica and silicate deposition Inhibition of silica and silicate deposition

C - Chemistry, Metallurgy

23

F

C23F 11/10 (2006.01) C02F 5/10 (2006.01)

Patent

CA 2336247

A method of controlling the deposition of silica-containing scales and their adhesion to surfaces in contact with an aqueous system is disclosed which comprises adding to the aqueous system a synergistic combination of: (a) diethylenetriamine penta methylene phosphonic acid; and (b) a material selected from the group consisting of 2 phosphonobutane-1,2,4-tricarboxylic acid; high molecular weight, 3:1, acrylic acid/allylhydroxy-propylsulfonate ether copolymer; ethylene oxide-propylene oxide block copolymers; and polyepoxysuccinic acid and salts thereof.

L'invention concerne un procédé éliminant le dépôt de tartre contenant de la silice et son adhésion à des surfaces au contact d'un système aqueux consistant à ajouter au système aqueux une combinaison synergique: (a) de l'acide diéthylènetriamine pentaméthylène phosphonique; et (b) d'une matière choisie dans le groupe comprenant l'acide de phosphonobutane-1,2,4-tricarboxylique, un copolymère de masse moléculaire élevée, 3:1, acide acrylique/allylhydroxypropylsulfonate éther; des copolymères séquencés d'oxyde d'éthylène-oxyde de propylène et des acides polyépoxysuccinique et leurs sels.

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