关键词: 酯季铵盐 , 防膨 , 缓蚀

Abstract: The N,N,N-3-ethyl-2-hydroxy-3-lauroyloxy propyl triethyl ammonium chloride (CELA) was synthesized with lauric acid, epichlorohydrin and triethylamine as the main starting materials. The main reaction include esterification and quaternization. The reaction process was studied and the result as follows, the esterification conditions: n(lauric acid)/n(epichlorohydrin)=1.0:1.2, reaction temperature was 80 ℃, reaction time was 8 h,benzyl triethylammonium chloride (TEBAC) was the catalyst and the lauric acid-2-hydroxy-3-chlorine-propyl ester yield rate is 98.7%. The quaternization conditions: n(intermediate)/n(triethylamine)=1.0:1.8, the temperature was 80 ℃, isopropyl alcohol was the solvent, reaction time was 25 h,the active mass fraction of purified production is 95.0%. The product was identified by FT-IR and the property was tested. The cmc of CELA solution was 0.21 mmol/L and surface tension was 33.27 mN/m at 25 ℃. The antiswelling rate to kaoline is 80% when the mass concentration of CELA was 20 g/L. Corrosion mitigation rate to A3 steel is 87.5% when the mass concentration of CELA was 40 mg/L.

Key words: Esterquat, Antiswelling, Corrosion mitigation 