重质高酸原油破乳剂复配合成及应用

摘要

To effectively solve the demulsification problem during heavy and high acidic crude oil desalting process, some of the universal demulsifiers with good performance were selected based on the crude oil properties firstly.Then the selected demulsifiers one by one mixed with different additives to test its dehydrating performance.Among of them, two kinds of demulsifiers with the best dehydration were selected.Finally, a good oil soluble demulsifier FO6 was obtained by comparing desalting effect, dosage and cost.The FO6 was then applied in a dynamic desalting experiment and industrial trial.The results indicate that when the dosage of demulsifier FO6 is 10 μg/g, the salt and water in crude after desalting is less than 3 mg/L and 0.3%, respectively.The oil content in electric desalting discharge sewage is lower than 150 mg/L, The process indicators conform to the requirements of processing crude of refinery.%针对重质高酸原油破乳脱盐困难的问题,首先在原油性质分析的基础上对市售部分破乳剂进行性能评定,筛选几种性能优良的破乳剂单剂,将这些破乳剂单剂与不同助剂进行复配,筛选出两种脱水效果较好的破乳剂.通过比较两种破乳剂的加注量、脱盐效果及使用成本最终得到油溶性破乳剂FO6.破乳剂FO6动态脱盐试验及工业应用结果表明:当添加量为10 μg/g时,脱后原油含盐量低于3 mg/L,脱后原油含水量低于0.3%,电脱盐排水中污水含油量小于150 mg/L,各项工艺控制指标符合炼油厂原油加工要求.