甲基叔丁基醚(MTBE)/轻汽油醚化装置腐蚀原因分析及解决措施  

Cause analysis and solutions of corrosion for MTBE and light gasoline etherification unit

作　　者：李林[1] 孙丽琳[1] 薛金召[2] 张尚勇 LI Lin;SUN Lilin;XUE Jinzhao;ZHANG Shangyong(Lanzhou Petrochemical Branch,PetroChina Company limited,Lanzhou 730060,China;Hunan Petrochemical Vocational Technology College,Yueyang 414012,China;Sales Company of Baoji Petroleum Machinery Co.,Ltd.,Baoji 721002,China)

机构地区：[1]中国石油天然气股份有限公司兰州石化分公司,甘肃兰州730060 [2]湖南石油化工职业技术学院,湖南岳阳414012 [3]宝鸡石油机械有限责任公司销售公司,陕西宝鸡721002

出　　处：《精细石油化工进展》2025年第2期37-41,共5页Advances in Fine Petrochemicals

基　　金：湖南省教育厅科学研究项目“固定床渣油加氢装置原料预处理技术研究”(22C1070)。

摘　　要：甲基叔丁基醚(MTBE)/轻汽油醚化装置在生产运行过程中因强酸性树脂催化剂磺酸基脱落、强酸性树脂催化剂中存在残余的游离酸、原料中存在金属离子和碱性物质、甲醇原料中存在微量酸性组分等问题,导致装置反应分馏系统和甲醇回收系统中的部分设备和管线发生腐蚀。为预防或减轻装置的腐蚀问题,通过优化设备选材、控制原料质量、稳定反应器温度、置换甲醇回收系统萃取水、碱中和萃取水以及增加萃取水脱酸系统等措施,来实现装置长周期稳定运行,其中,萃取水脱酸技术是目前醚化装置使用较多、能够解决装置腐蚀问题的技术,具有较好的应用前景。During the production and operation of the MTBE and light gasoline etherification unit,corrosion occurred in some equipment and pipelines in the reaction distillation system and methanol recovery system due to the detachment of sulfonic acid groups from the strongly acidic resin catalyst,residual free acid in the strongly acidic resin catalyst,metal ions and alkaline substances in the raw materials,and trace acidic components in the methanol raw materials.To solve the corrosion problem,measures such as optimizing equipment material selection,controlling raw material quality,stabilizing reactor reaction temperature,methanol recovery system extraction water displacement,extraction water injection alkali neutralization,and adding extraction water deacidification system can prevent or reduce the corrosion problem of the device,and play a positive role in achieving long-term stable operation of the device.Among them,the extraction water deacidification technology is currently the most commonly used technology to solve the corrosion problem in etherification units with good application prospects.

关 键 词：醚化 反应分馏 甲醇回收 腐蚀 脱酸剂 甲基叔丁基醚 强酸性树脂 

分 类 号：TE6[石油与天然气工程—油气加工工程]