The Study On New Corrosion And Scale Inhibtor

With principle of green chemistry, we design a one-step synthesis method to develop a polybasic copolymer, phosphonic carboxylic acid, which takes water as solution, maleic anhydride, acrylic acid and sodium hypophosphite as raw materials and hydrogen peroxide as initiator with some catalyst added. Optimized processing conditions and proper mole ratio of reactants also have been established, and the total phosphorous content is less than 5%(based on PO43"). The results of static, dynamic and field tests show that this kind of product has a excellent corrosion inhibition and scale inhibition, low phosphorous content, meets requirements of environment protection and has a promising application future.This high molecular copolymer has phosphono group and carboxyl group. Many function groups coexistence make it not only both advantages of organic phosphonic acid and carboxyl acid, which are high dispersivity and good corrosion inhibition, but also has advantages of stable structure (bearing C-P bond), low phosphorous content(based on PO3-4,≤5%)), little toxicity, no pollution and good compatibility with other water treatment agents; Therefore it can be used in severe conditions of high hardness, high alkaline and high pH. The most important character of this product is adopting aqueous phase synthesis, which avoids environment pollution by using organic solvents; therefore, this product is a green water treatment agent with a simple synthesis process, high stability, low cost; therefore it has a promising developing prospect, and will become alternative of organic phosphonate mono-agent.The major research fields is to produce polycarboxyl acid based on aqueous solvents, including developing catalysts with high efficiency, screening initiator, determining conditions for polymer phosphorization, analyzing structure analysis, measuring molecular weight, testing corrosion inhibition and scale inhibition of product, metering unreacted monomer, assaying total phosphorous content,establishing a economic, effective synthesis process and evaluation molecular of polymers produced.The product's the field test. Adoption titration the analysis method proceeds to clear water system, dirty water system and the groundwater system respectively scale inhibitor the rate monitor, adopt to hang the slice the experiment to proceeds with groundwater systems , clear water system, dirty water system respectively corrosion eclipse the rate monitor.The adoption industry circulates the water standard to decay to try the slice proceedses to hang the slice to experiment, and at any time proceeds to fluid matter corrosion and scale inhibitor monitor, the exploitation hang the slice an experiment, and oil field of gathering and transferr the system water to be proceed to monitor .Through monitor the analysis and hang the slice to experiment, and the function attain to expect the standard, and apply the result to is good.