摘要:
An aqueous system containing scale forming salts including both calcium carbonate and calcium phosphate and characterized by high pH and high calcite concentrations which further contains a synergistic effective amount of a combination comprising (A) a polyether polyamino methylene phosphonate, and (B) a terpolymer comprising the monomers of acrylic acid, sulfophenomethallyl ether and maleic acid, is disclosed. A method for inhibiting the formation, deposition and adherence of such scale forming salts in the aqueous system employing the synergistic combination is also provided.
摘要:
The present invention is directed to a composition useful for inhibiting the corrosion of copper and copper alloy metals in an aqueous system comprising mercaptothiazoline and ferrous ions.The present invention is also directed to a method of inhibiting the corrosion of copper and copper alloy metals in an aqueous system comprising maintaining in the aqueous system at least about 1 ppm (parts per million) of mercaptothiazoline, preferably in combination with ferrous ions.
摘要:
A method of simultaneously cleaning and disinfecting an industrial water system is described and claimed. The method involves the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. This cleaning and disinfecting method works in a variety of industrial water systems including cooling water systems.
摘要:
This invention relates to an improved method for inhibiting the formation and deposition of silica and silicate compounds in a water system. In particular, the method includes adding to the water system a relatively low molecular weight organic, anionic polymer. The polymer preferrably has an acrylic acid or methacrylic acid functionality and is preferrably selected from one or more of homopolymers of acrylic acid, a methacrylic acid/polyethylene glycol allyl ether copolymer, a homopolymer of methacrylic acid, an acrylic acid/polyethylene glycol allyl ether copolymer, and an acrylic acid/1-allyloxy-2-hydroxypropane sulfonic acid copolymer, homopolymers of maleic anhydride, copolymers of maleic anhydride and polyethylene glycol allyl ether, and combinations thereof.
摘要:
A method for inhibiting the formation and deposition of silica and silicate compounds in water systems comprising adding to the water in the water system an effective inhibiting amount of one or more water-soluble polymers of formula wherein M is a repeating unit obtained after polymerization of one or more monomers comprising a polymerizable carbon-carbon double bond; r is 0 to about 5 mole percent, s is 100 to about 95 mole percent; R1 is H or C1-C4 alkyl; R2 is a group of formula —(CH2—CHR3—O)n—; R3 is H or CH3, or a mixture thereof; and n is 2 to about 25.
摘要:
The current invention relates to the inhibition of scale deposits in an acidic slurry or solution. The current invention uses an aqueous synthetic mixture comprising a phosphate, phosphonate, anionic polymer, or combinations thereof in the slurry and/or solution to inhibit scale during the processing of ore. The production of scale in an acidic environment is difficult because of the acidic solution neutralizing most known inhibitors. The claimed invention has a significant decrease in the scale production allowing for reduced down time of systems for de-scaling procedures.
摘要:
A method for reducing formation of deposits on a surface in contact with an aqueous system includes applying to the surface a composition comprising a polyoxypropylene-polyoxyethylene block copolymer and a biocide. The composition optionally may also include a dispersant.
摘要:
A method for inhibiting the formation, deposition and adherence of scale forming salts including calcium carbonate and calcium phosphate in an aqueous system having a pH of at least 8.5 and a calcite saturation level of at least 100 times the solubility limit of calcium as calcite, including adding to the aqueous system a synergistic effective amount of a combination comprising (A) a polyether polyamino methylene phosphonate, (B) a terpolymer comprising the monomers of acrylic acid, sulfophenoxymethallyl ether and maleic acid, (C) a hydroxyphosphonoacetic acid, and (D) a phosphonocarboxylic acid copolymer.