摘要:
Hydroxycarboxylic acids and/or transition metal salts may be added to an aqueous system to inhibit corrosion and/or scale deposition within the aqueous system. In a non-limiting embodiment, a phosphorous-containing component may not be added to or include in the aqueous system. The hydroxycarboxylic acid may have two or more carboxylic acid groups. The transition metal salt may have or include a transition metal, such as but not limited to, Zn (II), Zn (IV), Sn, Al, Mn, and combinations thereof. The aqueous system may be or include a cooling tower, a cooling water system, and combinations thereof.
摘要:
Provided are a method and an agent for treating water in a cooling water system equipped with an iron-made facility, both of which can prevent the corrosion of iron and can also prevent the formation of calcium-containing scales effectively. A method for treating water in a cooling water system equipped with an iron-made facility, which comprises adding a combination of tungstic acid and/or a tungstate, and polyacrylic acid and/or a copolymer to the cooling water system, wherein the copolymer is produced by copolymerizing acrylic acid with a monomer having a sulfonic acid group, and the content of acrylic acid in the copolymer is 97% or more.
摘要:
An object is to provide a sea water desalinating method that is capable of efficiently producing purified water, such as fresh water, from unpurified water, such as sea water. There is a step of carrying out a wastewater treatment by subjecting inorganic wastewater to precipitation and separation. Thus obtained supernatant water is further filtered e.g. by sand filtration means, microfiltration or ultrafiltation and the permeate is directed to the reverse osmosis unit. The RO concentrate is considered low salt concentration water and is mixed, as diluent water, into sea water to produce mixed water. The mixed water prepared by the mixing is finally subjected to reverse osmosis membrane filtration, thereby generating fresh water.
摘要:
Beschrieben wird ein Verfahren zur Reduktion der Spülkosten von Entwässerungssystemen, welches dadurch gekennzeichnet ist, dass dem abfliessenden Wasser im Entwässerungssystem eine wirksame Menge eines Wirkstoffs zudosiert wird und dieser einen wirksamen Gehalt an Fruchtsäure enthält.
摘要:
An object of the present invention is to provide: a water-soluble polymer which can exercise a high calcium-ion-binding ability and a high clay dispersibility even under circumstances where high-hardness water is used; and a process for producing such a water-soluble polymer with ease and good productivity. As a means of achieving this object, the water-soluble polymer according to the present invention has: (1) a calcium-ion-binding ability of not less than 470 mgCaCO3/g and further a clay dispersibility of not less than 0.90 in a test liquid having a calcium concentration of 50 ppm in terms of calcium carbonate; or (2) a calcium-ion-binding ability of not less than 430 mgCaCO3/g and further a clay dispersibility of not less than 0.70 in a test liquid having a calcium concentration of 100 ppm in terms of calcium carbonate.
摘要:
An all in one boiler water treatment composition includes an oxygen scavenging system, an alkalinity control agent such as sodium carbonate, diethylaminoethanol as a condensate treatment, a polymer system including polymethacrylate or polyacrylate and polymaleic acid along with an oxygen scavenging system. The oxygen scavenging system includes the diethylaminoethanol, a polyhydroxy acid and a sulfite.
摘要:
This invention is directed to the use of an improved composition for inhibiting the precipitation of calcium oxalate in aqueous systems. The composition contains: (a) a water soluble phosphate; and (b) a water soluble polycarboxylate having a weight average molecular weight of about 7,000 to about 9,000; wherein the ratio of component (a) to component (b) ranges from 10:1 to 1:10.