Test procedures for evaluating deposit control polymers

TEST PROCEDURES

Test Procedures for Evaluating Deposit Control Polymers
Lubrizol’s test procedures for evaluating threshold inhibition, dispersancy, metal ion stabilization, deposit control, and product use considerations for deposit control polymers are discussed herein. A list of test methods discussed herein appears below. 1) Threshold Inhibition a) Calcium carbonate i) Static moderateconditions ii) Stirred severe conditions b) Calcium sulfate c) Barium sulfate d) Calcium phosphate e) Calcium phosphonate f) Silica polymerization 2) Dispersancy a) Iron oxide b) Hydroxyapatite c) Kaolin clay 3) Metal ion stabilization a) Iron b) Zinc 4) Deposit Control a) Calcium carbonate b) Calcium sulfate 5) Product Use Considerations a) Calcium ion Tolerance i) Long term ii) Short term b)Chlorine compatibility c) Hydrolytic stability d) Thermal stability e) Total solids

CBS-TPEDCPP (Oct-07) ™ Trademark of The Lubrizol Corporation
The information contained herein is believed to be reliable, but no representations, guarantees or warranties of any kind are made as to its accuracy, suitability for particular applications or the results to be obtained. The information is based onlaboratory work with small-scale equipment and does not necessarily indicate end product performance. Because of the variations in methods, conditions and equipment used commercially in processing these materials, no warranties or guarantees are made as to the suitability of the products for the applications disclosed. Full-scale testing and end product performance are the responsibility of the user.Lubrizol Advanced Materials, Inc. shall not be liable for and the customer assumes all risk and liability of any use or handling of any material beyond Lubrizol Advanced Materials, Inc.'s direct control. The SELLER MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Nothing contained herein is to beconsidered as permission, recommendation, nor as an inducement to practice any patented invention without permission of the patent owner. © 2007 The Lubrizol Corporation

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Threshold Inhibition Testing Methods
Static Calcium Carbonate Inhibition (Moderate Conditions) 1. Prepare supersaturated solutions of CaCO3 [560 ppm Ca+2 as CaCO3, 630 ppm (HCO3)-1 as CaCO3, and 30 ppm (CO3)-2 as CaCO3] at a pH of 8.3 containing 0 to 5.0 ppm scale inhibitor. 2. Store in capped 500-mL Erlenmeyer flasks and place in a 66°C oven for 24 hours without agitation. 3. Filterthrough a 0.22-µm filter paper, and analyze for Ca+2 concentration using standard EDTA solution. 4. Calculate inhibition using the following formula: [ Ca+2] sample – [Ca+2] control % Inhibition = [Ca+2] initial – [Ca+2] control Where the terms above are as follows: Inhibition (%) = [Ca+2] sample = [Ca+2] blank = [Ca+2] initial = %I Ca+2 concentration in the presence of inhibitor at the end of thetest Ca+2 concentration in the absence of inhibitor at the end of the test Ca+2 concentration at the beginning of test

x 100

For the test procedures that follow, the constituents or parameters evaluated and measured may vary but the terms in the equations are defined in the same way as follows: “% I” or “% S” [Parameter of interest] sample [Parameter of interest] blank [Parameter of interest]initial = = = = Inhibition (%) or Stabilization (%) Concentration for parameter of interest in the presence of inhibitor at the end of the test Concentration for parameter of interest in the absence of inhibitor at the end of the test Concentration for the parameter of interest at the beginning of the test

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Stirred Threshold...