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CN105154049B 一种缓蚀剂及其制备方法 有权

一种缓蚀剂及其制备方法
摘要：
本发明涉及一种缓蚀剂及其制备方法。以重量百分比计，该缓蚀剂包括：曼尼希碱50～70％，磷酸酯10～20％，异丙醇10～20％，钼酸钠10～20％。该缓蚀剂的制备方法为：在三口烧瓶中加入N‑甲基苯胺并加热至80℃，用浓盐酸调节pH值到2；将烧瓶加热至95℃，向烧瓶中加入丙酮，加热至150℃；向烧瓶中加入甲醛、苯甲醛，保持温度为150℃，搅拌下回流4小时，得到曼尼希碱；以重量百分比计，将曼尼希碱50～70％，磷酸酯10～20％，异丙醇10～20％，钼酸钠10～20％进行复配，得到缓蚀剂。该缓蚀剂可适用于180℃的高温。在缓蚀剂浓度为100ppm时，N80铁片在180℃下的塔河油田地层水腐蚀6小时后，缓蚀剂的缓蚀率为90.04％。
摘要（英）：

The invention relates to a corrosion inhibitor and a preparation method thereof. The corrosion inhibitor comprises, by weight: 50-70% of Mannich base, 10-20% of phosphate, 10-20% of isopropanol, and 10-20% of sodium molybdate. The preparation method of the corrosion inhibitor comprises: adding N-methylaniline into a three-neck flask, heating the flask to 80 DEG C, and adjusting the pH value to 2 with concentrated hydrochloric acid; heating the flask to 95 DEG C, adding acetone into the flask, and heating the flask to 150 DEG C; adding formaldehyde and benzaldehyde into the flask, maintaining the temperature at 150 DEG C, and performing reflux for 4h while performing stirring to obtain Mannich base; and compounding, by weight, 50-70% of Mannich base, 10-20% of phosphate, 10-20% of isopropanol, and 10-20% of sodium molybdate to prepare the corrosion inhibitor. The corrosion inhibitor can be used at a high temperature of 180 DEG C. When the concentration of the corrosion inhibitor is 100 ppm, an N80 iron sheet is corroded by stratum water of the Tahe Oilfield for 6h at 180 DEG C, and the corrosion inhibition rate is 90.04%.

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