C₄ alkylate oil is an ideal blending component of automotive gasoline, and the green removal of sulfuric acid and sulfates from the high-temperature sulfuric acid alkylation reaction products (SAARP) has always been a hot issue in the field of clean alkylation production. In this paper, a novel coalescence separation-depth adsorption (CS-DA) coupling dry separation technique is introduced to efficiently separate acid-hydrocarbon emulsions, with the aim to supersede the alkaline washing-water washing (AW-WW) process in alkylation unit. Lateral line tests were conducted on the coupling treatment of the alkylation reaction products (ARP) produced in the STRATCO alkylation unit of Sinopec Tianjin Branch. The sulfur morphology analysis shows that the sulfides in the ARP mainly come from C₄ feedstocks and alkylation reaction, including mercaptans, thioethers, thiophenes, trace hydrogen sulfide and sulfur dioxide. The mechanism of coalescence separation reveals that the efficient removal process of sulfuric acid by fiber coalescence separation also has a function similar to "pickling extraction" to remove sulfates. In addition, we investigated the influence of CS-DA coupling treatment on the total sulfur and sulfuric acid content in the ARP and performed the copper corrosion and water-soluble acid assays. The research findings indicated that the back sideline of the acid coalescer had the most outstanding separation effect relative to the front and rear lateral lines of the heat exchanger. The total sulfur content in the ARP after separation can be reduced to less than 5 mg/L, without water-soluble acid and copper corrosion (1a). The industrial application shows that the CS-DA coupling dry separation technique can completely replace the AW-WW process, which makes the various indicators of alkylate oil strictly controlled and the sulfur content up to the industrial standard. The novel dry separation technique provides a promising alternative for solving the difficulties in the emulsion treatment of high-temperature sulfuric acid alkylation and promoting the clean production of alkylation.

C ₄烷基化油是车用汽油的理想调和组分，高温硫酸烷基化反应产物（SAARP）中硫酸和硫酸盐的绿色脱除一直是清洁烷基化生产领域的热点问题。本文介绍了一种新型的聚结分离-深度吸附（CS-DA）耦合干分离技术，以有效分离酸烃乳液，旨在取代烷基化装置中的碱洗-水洗（AW-WW）工艺。 . 对中石化天津分公司STRATCO烷基化装置生产的烷基化反应产物（ARP）的偶联处理进行了侧线试验。硫形态分析表明，ARP中的硫化物主要来自C ₄原料和烷基化反应，包括硫醇、硫醚、噻吩、微量硫化氢和二氧化硫。聚结分离机理揭示了纤维聚结分离高效去除硫酸的过程也具有类似于“酸洗萃取”的去除硫酸盐的作用。此外，我们研究了CS-DA偶联处理对ARP中总硫和硫酸含量的影响，并进行了铜腐蚀和水溶性酸测定。研究结果表明，酸聚结器后侧线相对于换热器前后侧线的分离效果最为突出。分离后的ARP总硫含量可降至5mg/L以下，无水溶性酸和铜腐蚀（1a）。工业应用表明，CS-DA耦合干法分离技术可以完全替代AW-WW工艺，使烷基化油各项指标得到严格控制，硫含量达到行业标准。新的干法分离技术为解决高温硫酸烷基化乳液处理中的困难和促进烷基化的清洁生产提供了有希望的替代方法。