Amino trimethylene phosphonic acid (ATMP), with the CAS number 6419-19-8, is a widely used organophosphorus compound. It appears as a clear, colorless to slightly yellow liquid or a white crystalline powder. The molecular formula of ATMP is C₃H₁₂NO₉P₃, and its molecular weight is approximately 299.04 g/mol.
ATMP has excellent chelating ability and can form stable complexes with metal ions such as calcium, magnesium, and iron. It has good thermal stability and chemical resistance, remaining stable under a wide range of pH values (usually between 2 - 12).
1. Water Treatment: ATMP is a key component in water treatment agents. It can effectively prevent the formation of scale in industrial water systems, such as cooling water systems, boilers, and reverse osmosis membranes. By chelating metal ions, it inhibits the precipitation of calcium carbonate, calcium sulfate, and other scale - forming salts, thus improving the efficiency and service life of water - using equipment.
2. Detergent Industry: In detergents, ATMP can be used as a builder. It helps to enhance the cleaning performance by sequestering metal ions in hard water, preventing the formation of insoluble metal salts on fabrics and improving the surfactant's effectiveness.
3. Pulp and Paper Industry: ATMP is used to control the deposition of metal ions in pulp and paper processing, reducing the formation of scale on equipment surfaces and improving the quality of the final paper products.
1. Dosage: The appropriate dosage of ATMP depends on the specific application and water quality conditions. In water treatment, the dosage usually ranges from 1 - 20 mg/L. For more severe scaling conditions, higher dosages may be required. It is recommended to conduct a small - scale test before large - scale use to determine the optimal dosage.
2. Addition Method: ATMP can be added directly to the water system. It can be added continuously or intermittently, depending on the operation mode of the system. When adding, it should be evenly distributed to ensure its full contact with the water and metal ions.
3. Compatibility: ATMP can be used in combination with other water treatment agents, such as corrosion inhibitors and dispersants. However, it is necessary to ensure the compatibility of different agents to avoid chemical reactions that may reduce their effectiveness.
1. Cooling Water System in a Chemical Plant: A chemical plant was facing serious scaling problems in its cooling water system. The heat transfer efficiency of the cooling equipment decreased significantly, leading to increased energy consumption. After adding ATMP at a dosage of 15 mg/L, the formation of scale was effectively controlled. The heat transfer coefficient of the equipment increased by 20%, and the energy consumption was reduced by 15%. The maintenance frequency of the cooling system also decreased, resulting in significant cost savings.
2. Detergent for a Laundry: A laundry used a detergent formulated with ATMP. The laundry was dealing with hard water, and the clothes often came out with a dull appearance and residual dirt after washing. After switching to the ATMP - containing detergent, the cleaning performance improved significantly. The clothes were cleaner, and the softness of the fabrics was also enhanced. Customer satisfaction increased by 30%, leading to a growth in the laundry's business.
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