DESCALING AGENT AND WATER TREATING PROGRAM USING THE SAME

• Main Authors: YOO, GWANG HUI, HA, JAE MIN, PARK, JUN WON, SHIN, JEONG JU, HAN, SUN JONG, CHOI, DONG JIN
• Format: Patent
• Language: English; Korean
• Published: 13.09.2001
• Edition: 7
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE: An antiscaling agent of preventing scale deposition on pipes has superior performance in water of which calcium hardness(CaH) is higher than 30ppm without toxicity to aqueous living creatures when discharged into water bodies. CONSTITUTION: The antiscaling agent comprises: (i) 0.5-40ppm of an orthophosphate selected from the group consisting of hydroxyethylidene diphosphonic acid, hydroxy phosphonocarboxylic acid, amino trimethylene phosphonic acid and phosphono butane tricarboxylic acid; (ii) 0.5-40ppm of a polyphosphate; (iii) 0.1-50ppm of organic phosphate; (iv) 0.1-20ppm of azole compound selected from the group consisting of tolyltriazole, benzotriazole, and mercapto benzothiazole; and (v) 0.1-100ppm of acrylate trimer represented by chemical formula I, where l, m, and n are identical or different each other, being an integer of 5 to 1000, respectively; R1 and R6 are identical or different each other, and denote hydrogen atom, alkyl or hydroxy respectively; R2 and R3 are identical or different each other, and denote hydrogen atom or alkyl with a carbon number of C1 to C2, respectively; R4 denote hydrogen atom or alkyl with a carbon number of C1 to C5; R5 denote alkyl with a carbon number of C1 to C8 or arylalkyl with a carbon number of C8 to C10; X and Y are identical or different each other, and denote hydrogen atom, alkyl with a carbon number of C1 to C5, hydroxy alkyl with a carbon number of C1 to C5; R0 is selected from chemical formula II, chemical formula III, and chemical formula IV. In the chemical formula II, III, and IV, R6 denote hydrogen atom or alkyl with a carbon number of C1 to C2; R12 denote hydrogen atom or alkyl with a carbon number of C1 to C2; R13 and R14 are identical or different each other, and denote hydrogen atom, alkyl with a carbon number of C1 to C8, cycloalkyl with a carbon number of C6 to C8, benzyl or chemical formula V; R7 denote alkyl with a carbon number of C to C7, allyl with a carbon number of C6 to C8, arylalkyl with a carbon number of C6 to C10 or chemical formula V, wherein i is an integer of 1 to 3; R9 denote hydrogen atom or alkyl with a carbon number of C1 to C2; R10 denote hydrogen atom or alkyl with a carbon number of C1 to C6.