Synthesis of Sulfomethylated Urea, Thiourea, Aniline Derivatives and Their Application

A prospective study on the synthesis of sulfomethylated urea, thiourea and aniline is presented. Experiments were performed under atmospheric pressure. The obtained products and compositions based thereon can be used as inhibitors of mineral scales. Products were prepared at four different composition of components and named DASS-1 to DASS-4. Optimal conditions for the production of desired products are defined. All synthesized products have inhibitory properties, but their individual application for waters with high hardness do not provide the desired result and approximately 50-80 % lower than the standard reference industrial scale inhibitors. However, high effective inhibitors were developed through preparing a composition in equimolecular proportions of the synthesized products with IOMS-1 and OEDP. The inhibition efficiency of the product of DASS-1+OEDP with a concentration of 3.0+2.0 reaches 96.5% at a water hardness of 4-5 mEq/L (about 30% efficiency) and 92.0% at 13-14 mEq/L (10% efficiency). It is proved that the inhibitory properties of complexons (chelating agents) were clearly affected by the denticity of complexing ligands.