Add time:07/27/2019         Source:sciencedirect.com

Ammonia triethyl amide (ATEA) was synthesized by a new facile one-step method using chloroacetamide and ammonia as raw materials, and its structure was characterized by FTIR and 1HNMR. TGA showed that the decomposition temperature of compounds was about 110 °C, which had good thermal stability. Its performance of inhibiting salt deposition was evaluated and the mechanism of salt inhibition was analyzed systematically. On the one hand, the optimal concentration of ATEA was 10 kg/m3 and the dispersion rate at this concentration was 79.6%. XRD and SEM analysis confirmed that the structure of NaCl crystal was not changed, but it had a tendency to grow into star-shaped crystal. On the other hand, with the increase of aging time and temperature, the solubilization rate decreased, and with the increase of pH value, the solubilization rate increased first and then decreased. At a concentration of 10 kg/m3, the solubilization rate was 6.58% after aging 16 days, was 6.35% when pH = 10 and was 5.43% at 95 °C. The maximum dispersion rate (88.35%) and the maximum solubilization rate (10.38%) were achieved when the mass concentration ratio of ammonia triethyl amide to potassium ferrocyanide were 6:4 and 7:3, respectively. The experimental results showed that ammonia triethyl amide had good synergy effect with potassium ferrocyanide for removing sodium chloride deposition.

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