ACUMER 3100 Terpolymer The Anti-Scale Deposition for Stressed Cooling Water Conditions

Transcription

1 ACUMER 3100 Terpolymer The Anti-Scale Deposition for Stressed Cooling Water Conditions ACUMER 3100 is a carboxylate/sulfonate/nonionic functional terpolymer. It is a superior dispersant and stabilizer for use in all cooling water programs. When other polymers fail under stressed conditions, ACUMER 3100 will maintain excellent heat transfer and low corrosion rates in the system. Stressed conditions are found in cooling waters containing high levels of calcium, iron, phosphate, or zinc either, naturally occurring in the feedwater or introduced via treatment. These circulating waters may have either a very low or a very high Ryznar Index since ACUMER 3100 performs well in waters with either a scaling or corrosion problem. It is an excellent anti-scalant agent and, also, a stabilizer for corrosion inhibitors such as phosphate and zinc. ACUMER 3100 will disperse particulate matter containing calcium, iron, and kaolin and prevent their adhesion to heat transfer surfaces. This terpolymer also prevents the precipitation of phosphonates, and zinc in circulating water with high amounts of calcium, iron, or alkalinity, to allow controlled film formation of these corrosion inhibitors at the metal surface and, thus, maintain low corrosion rates. PHYSICAL PROPERTIES The typical physical properties of ACUMER 3100 terpolymer are listed in Table 1. TABLE 1 TYPICAL PHYSICAL PROPERTIES (These do not constitute specifications) Total Solids, percent 43.5 Active Solids, percent 39.5 Molecular Weight 4500 Brookfield Viscosity, cps. 200 Specific Gravity 1.2 Bulk Density, lbs./gal. (g/cc) 10 (1.2) ph 2.5 Lbs. (Kg) NaOH (100%) to neutralize Lb. (kg) ACUMER 3100 Rohm and Haas Company, 1999

2 CHEMISTRY AND MECHANISM OF ACTION ACUMER 3100 terpolymer contains three functional groups: strong acid (sulfonate), weak acid (carboxylate), and a nonionic that provide optimal dispersancy for most particulates under a broad range of operating conditions. Among the three functionalities, ACUMER 3100 carboxylate groups are most strongly attracted to particle surfaces, allowing strong dispersant adsorption onto particles. ACUMER 3100 sulfonate groups are only weakly attracted to the particle surface and retain some residual negative charge to provide repulsion of similarly charged particles in the cooling water circuit. This repulsion prevents particles from aggregating into larger particles which can settle and deposit on tube surfaces and low flow areas. ACUMER 3100 nonionic groups further enhance dispersancy by providing steric repulsion between particles. This multi-functional action contrasts sharply to other dispersants, such as polyacrylic acid or polymethacrylic acid, having only carboxylate functionality which can become strongly attached to certain particles, leaving little residual negative charge available to provide dispersancy. Other polymers, such as SSMA can provide better dispersancy than PAA or PMAA on some particle substrates, but do not have the nonionic group which allows ACUMER 3100 terpolymer to function on a broader range of potential foulants. DISPERSANCY PERFORMANCE ACUMER 3100 terpolymer outperforms polymaleic acid and competitive polymers under cooling water conditions. FIGURE 1. IRON OXIDE DISPERSANCY COOLING WATER CONDITIONS, ph = 7.5 Ca +2, as CaCO ppm Fe 2 O 3 : 700 ppm Active Polymer: 3 ppm Settling Time: 4 hours 2

3 STABILIZED PHOSPHATE PROGRAM Stabilizers control the deposition of phosphate to allow the formation of a very thin protective film on metal surfaces but prevent excessive deposits that reduce heat transfer efficiency. The graphs in Figures 2-4 show that ACUMER 3100 is also the best stabilizer for orthophosphate in high levels of calcium and iron. FIGURE 2. COOLING WATER STABILIZED PHOSPHATE PROGRAM Active Polymer: 10 ppm M-Alkalinity: 200 ppm Temperature: 49 C (120 F) Ca as CaCO 3 : 400 ppm Test Duration: 20 hours Mg as CaCO 3 : 200 ppm ph: 7-9 Orthophosphate as PO 4 : 10 ppm 3

4 FIGURE 3. CALCIUM PHOSPHATE STABILIZATION HIGH TEMPERATURE NO IRON FIGURE 4. CALCIUM PHOSPHATE STABILIZATION MODERATE TEMPERATURE WITH IRON ph: 8.5 Temperature: 70 C (158 F) Test Duration: 23 hours Filter Size: 0.2µ Water Chemistry: Ca +2, as CaCO 3 : 1250 ppm PO -3 4, as PO -3 4 : 15 ppm Ryznar Index: 4.5 ph 8.5 Temperature: 49 C (120 F) Test Duration: 20 hours Filter Size: 0.45µ Water Chemistry: Ca +2, as CaCO 3 : Mg +2, as CaCO 3 : M-Alkalinity, as CaCO 3 : Orthophosphate, as PO -3 4 : Fe +3 : 400 ppm 200 ppm 200 ppm 14 ppm 0.5 ppm 4

5 All-Organic Program ALL-ORGANIC cooling water treatments rely on high ph (8-9) and high alkalinity (>200 ppm, as CaCO 3 ) to help passivate metal surfaces. Organic phosphonate is used to inhibit CaCO 3 precipitation and forms a cathodic corrosion-inhibiting film of calcium phosphonate. A yellow-metal inhibitor, such as tolyltriazole, is frequently included to inhibit brass or copper corrosion. Polymers, such as ACUMER 3100, are used to disperse particulates, inhibit CaCO 3 precipitation, and stabilize calcium phosphonate. ACUMER 3100 stands out as the superior polymer for this program. Figure 5 shows results from phosphonate stabilization tests which demonstrate the superiority of ACUMER FIGURE 5. COOLING WATER ALL-ORGANIC PROGRAM Active Polymer: 10 ppm M-Alkalinity: ppm Temperature: 49 C (120 F) Ca as CaCO 3 : ppm Test Duration: 20 hours Mg as CaCO 3 : ppm ph: 9 Phosphate: 5 ppm 5

6 FORMULATION STABILITY Formulated products containing inorganic polyphosphates or triazoles are packaged at a high ph to maintain stability of the concentrated formulation. Unlike some competitive polymers, ACUMER 3100 terpolymer exhibited no loss of performance after six months of storage at a ph of TEST METHODS ACUMER 3100 terpolymer may be analyzed at use concentration with the Hach polyacrylate test kit. This kit employs a patented method developed by Rohm and Haas Company. The kit was jointly developed by Rohm and Haas Company and the Hach Company. MATERIAL SAFETY DATA SHEETS Rohm and Haas Company maintains Material Safety Data Sheets (MSDS) on all of its products. These contain important information that you may need to protect your employees and customers against any known health and safety hazards associated with our products. We recommend you obtain copies of MSDS for our products from your local Rohm and Haas technical representative or the Rohm and Haas Company. In addition, we recommend you obtain copies of MSDS from your suppliers of other raw materials used with our product. Under the OSHA Hazard Communication Standard, workers must have access to and understand MSDS on all hazardous substances to which they are exposed. Thus, it is important that appropriate training and information be provided to all employees and that MSDS be available on any hazardous products in their workplace. Rohm and Haas Company sends MSDS on non-osha-hazardous as well as OSHA-hazardous products to both bill-to and ship-to locations of all our customers upon initial shipment (including samples) of all of our products. Updated MSDS are sent upon revision to all customers of record. In addition, MSDS are sent annually to all customers of record. PATENTS The use of ACUMER 3100 terpolymer for deposit control is covered by Rohm and Haas U.S. patent 4,711,725. ISO-CERTIFICATION All ACUMER polymers are produced in ISO 9002-certified plants. 6

7 For additional information, a sample, a Material Safety Data Sheet or to have a technical representative call for the nearest Rohm and Haas Office. THE AMERICAS Corporate Headquarters Rohm and Haas Company 100 Independence Mall West Philadelphia, PA Phone: Fax: Canada Phone: Fax: Brazil Phone: Fax: Mexico Phone: Fax: EUROPE France, Verneuil en Halatte Phone: Fax: France, Paris Phone: Fax: Germany Phone: Fax: Italy Phone: Fax: ASIA/ PACIFIC Australia/ New Zealand Phone: Fax: China, North Phone: Fax: China, South Phone: Fax: India Phone: Fax: Japan Phone: Fax: Philippines Phone: /98 Fax: Singapore/Malaysia Indonesia Phone: Fax: Internet Address: or Taiwan Phone: Fax: Thailand Phone: Fax: ACUMER is a registrated trademark of Rohm and Haas Company or of its subsidiaries or affiliates. The Company's Policy is to register its trademarks where products designed thereby are marketed by the Company, its subsidiaries or affiliates. These suggestions and data are based on information we believe to be reliable. They are offered in good faith, but without guarantee, as conditions and methods of use of our products are beyond our control. We recommend that the prospective user determine the suitability of our materials and suggestions before adopting them on a commercial scale. Suggestions for uses of our products or the inclusion of descriptive material from patents and the citation of specific patents in this publication should not be understood as recommending the use of our products in violation of any patent or as permission or license to use any patents of the Rohm and Haas Company. ACUMER 3100 is the subject of pending patent applications. FC-164c June 1999 Printed in U.S.A.