Abstract: Wen13-1/2 oil field liquefied petroleum gas (LPG) recovery project was CNOOC Zhanjiang branch so far the only LPG recycling project, the project had been put into operation so far, had created a good economic and social benefits.In recent years, it sometimes occured that WenChang oil field LPG products copper corrosion test was not qualified.After a series of research and demonstration, copper corrosion exceeding was demonstrated to be in relation of the hydrogen sulfide.Liquefied petroleum gas desulfurization agent Could be a good solution to the problem.This paper discussed the synthetic liquefied gas desulfurization agent, the optimum reaction conditions of:reaction time is 8h, 50% mass fraction of PMA, reaction temperature of 70 DEG C, DEA/MEA mixture of 40% mass fraction, liquefied gas desulfurizer desulfurization rate reached 99.13%.Liquefied gas desulfurization agent in the pH below 5, the reaction temperature was higher than 100 when the desulfurization efficiency will be affected.At a dosage of 50mL/min of Liquefied gas desulfurization agent for 6 months, copper corrosion test decreased from 2a to 1a.LPG products met the national standard requirements.

Key words: liguefied petroleum gas, corrosion, hydrogen sulfide scavenger

摘要： 文昌油田液化石油气(LPG)回收项目是中海油湛江分公司到目前为止唯一一个海上LPG回收项目,项目投产至今,创造了良好的经济效益和社会效益。近年来检测文昌油田LPG产品时而会发生铜腐测试不合格情况。经过现场调研论证发现该铜腐超标和LPG中夹带硫化氢相关。利用液化石油气脱硫剂能够很好地解决该问题。本文讨论了合成液化气脱硫剂的最佳反应条件:合成反应时间8h、PMA质量分数50%、反应温度70℃,DEA/MEA混合液质量分数40%,液化气脱硫剂的脱硫率最高可以达到99.13%。通过以上合成条件,合成了脱硫剂ETTS-1D2。ETTS-1D2在pH低于5,反应温度高于100℃时脱硫效率会受到一定影响。液化气脱硫剂以加注量50mL/min,在现场应用的6个月的时间里,可以有效地将铜腐指标从2a降低到1a。确保LPG产品符合国标标准要求。

关键词: 液化石油气, 腐蚀, 脱硫剂