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CAS No. 5995-42-6 EINECS No. 227-833-4 Molecular Weight 249 Structural Formula Product Features HEMPA is an organophosphoric acid, which exhibits excellent chelation, scale inhibition and corrosion inhibition. HEMPA is also compatible with methanol and water solution. When built together with other water treatment chemicals, HEMPA shows good synergistic effects. HEMPA is also an excellent dispersant for calcium-based deposits. HEMPA significantly improves the rinsing properties of washing and cleaning formulations. In high saline systems of oilfield applications, HEMPA can show its excellent...

PBTC (2 - Phosphonobutane - 1,2,4 - tricarboxylic acid) scale inhibitor is a kind of important water treatment chemical. Here is an overview of its manufacturing process: 1. Raw materials preparation Acrylic acid : It is a key raw material. High - purity acrylic acid is usually required. It provides the carboxyl groups that are essential for the functionality of PBTC. Phosphorous trichloride : Used to introduce the phosphonic acid group into the molecule. 2. Synthesis process Esterification reaction : Acrylic acid reacts with an alcohol (such as methanol) in the presence of a catalyst (usually a strong acid catalyst like sulfuric acid). The reaction forms an acrylic ester intermediate. For example, the reaction equation can be written. The reaction conditions generally require a certain temperature range (usually around 60 - 80°C) and proper agitation to ensure good mixing of reactants. Addition reaction with phosphorous trichloride : The acrylic ester then reac...