共查询到18条相似文献,搜索用时 187 毫秒
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离子液体萃取脱硫的研究 总被引:9,自引:5,他引:4
合成了一系列离子液体用于模拟油的萃取脱硫实验,考察了不同离子液体及其与模拟油的质量比、反应温度和反应时间等因素对模拟油萃取脱硫效果的影响。实验结果表明,离子液体1-丁基-3-乙基咪唑氯盐([BEIM]Cl)的萃取脱硫效果明显优于其他离子液体。当以[BEIM]Cl为萃取剂时,萃取脱硫的最优条件为:[BEIM]Cl与模拟油的质量比1.0,萃取温度30℃,萃取时间30min。在此条件下,单级脱硫率可达52.02%;经5级脱硫后,总脱硫率高达96.56%。采用溶剂反萃取法对[BEIM]Cl进行了再生,再生后[BEIM]Cl的脱硫率可达新鲜[BEIM]Cl的95%。 相似文献
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钱伯章 《精细石油化工进展》2018,(2)
正随着环保法规日趋严格,市场对高效脱硫技术需求紧迫。离子液体具有性质稳定、脱硫效率高、可以再生等优点,可作为良好的萃取脱硫剂,具有很好的应用前景,但由于成本较高一直难以工业化。在2017中国化工学会年会暨成立95周年纪念大会上,业内专家就离子液体脱硫新技术 相似文献
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离子液体的萃取脱硫性能研究 总被引:1,自引:0,他引:1
采用不同性质的离子液体萃取脱除模拟油中的有机含硫化合物。以二苯并噻吩(DBT)和萘的正己烷溶液为模型柴油考察了离子液体的饱和萃取量和选择性。结果表明,离子液体萃取脱硫可以在10min内达到萃取平衡;随着离子液体与油相体积比增大脱硫效果明显改善;离子液体中的阳离子和阴离子对脱硫效果影响很大,疏水性离子液体BMIMPF6对硫化物的萃取量远远大于亲水性离子液体BMIMBF4的萃取量;离子液体与油相体积比为1:1时,BMIMPF6和BMIMBF4萃取柴油中的硫化物,硫含量可以从530ppm分别下降到290ppm和410ppm。 相似文献
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离子液体的合成及其在萃取分离中的应用 总被引:6,自引:0,他引:6
简要介绍了离子液体的合成方法、表征方法及离子液体对高分子材料的溶解性和降解性;详细介绍了离子液体在萃取分离中的应用,包括硫酸钠和牛磺酸的固-固分离,涂料中苯、甲苯、乙苯、二甲苯分离和核废料回收的固-液分离,单偶氮取代的冠醚离子液体对稀有金属的分离及汽油脱硫等液-液萃取分离,离子液体与超临界CO2结合的萃取分离等. 相似文献
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综述了近年来离子液体在萃取精馏领域应用的基础性研究进展。主要介绍了在离子液体中的无限稀释活度系数的测定、汽液平衡的测定、含离子液体物系相平衡与活度系数模型研究以及离子液体萃取精馏的应用。目前离子液体用于萃取精馏存在基础性研究不足、生产成本高和工程应用等方面的问题。 相似文献
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磷酸酯类离子液体在燃油深度脱硫中的应用 总被引:16,自引:6,他引:10
研究了3种磷酸酯类离子液体,即1,3-二甲基咪唑磷酸二甲酯盐([MM im]DM P)、1-乙基-3-甲基咪唑磷酸二乙酯盐([EM im]DEP)和1-丁基-3-甲基咪唑磷酸二丁酯盐([BM im]DBP)的制备过程,考察了这3种磷酸酯类离子液体对模型油中3-甲基噻吩、苯并噻吩和二苯并噻吩的脱除效果及磷酸酯类离子液体的电化学再生方法。实验结果表明,这3种磷酸酯类离子液体的脱硫能力强弱顺序为:[EM im]DEP>[BM im]DBP[MM im]DM P;且对二苯并噻吩的脱除效果最好,对苯并噻吩的脱除效果次之,对3-甲基噻吩的脱除效果较差。以[EM im]DEP为萃取剂,油剂质量比为1∶1时,经5次萃取后,二苯并噻吩的脱除率可达到99.5%。利用电解法对[EM im]DEP进行了再生,在5~10V电压下电解10h,[EM im]DEP的脱硫率可以达到新鲜[EM im]DEP的90%以上。 相似文献
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离子液体用于燃料油脱硫是一种环境友好的新技术。综述了离子液体用于燃料油脱硫的几种方法,包括直接萃取法、氧化-萃取法、络合萃取法和烷基化法,介绍了离子液体的几种再生方法,并进行了对比。 相似文献
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In this work, a low-viscosity ionic liquid 1-buthyl-3-methylimidazole thiocyanate ([BMIM]SCN) was utilized as extractant for the extractive desulfurization of thiophene in model oil. Several conditions were investigated respectively, including extraction time, temperature, and volume ratio of ionic liquid to model oil. Also the kinetics of extraction of thiophene were proposed. Under the optimal extractive conditions, the removal of thiophene in model oil was 55.6%. Other sulfur compounds and real oil were also investigated. Furthermore, the total desulfurization efficiency could reach 98.3%. In addition, the ionic liquid could be recycled seven times with negligible decrease in activity. 相似文献
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Abstract Extraction of S-compounds from diesel oil by task-specific ionic liquids has been investigated. The influences of different ionic liquids, extraction time, extraction temperature, different S-compounds, the amount, and the recycling of ionic liquid were studied. This process is capable of removing up to 56% of dibenzothiophene in model diesel oil under optimum extraction conditions. At the same time, this process was applied to the real predesulfurized diesel oils. The results indicate that such a process could be an alternative to common hydrodesulfurization for deep desulfurization. 相似文献
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Abstract CuCl-based ionic liquid ([HMim]Cl/CuCl) was synthesized by mixing 1-hydracid-3-methylimidazolium chloride ([HMim]Cl) with CuCl. Ionic liquid ([HMim]Cl/CuCl) was employed as an extractant remove sulfur from gasoline. It was found that [HMim]Cl/CuCl can remove sulfur-containing compounds from gasoline at room temperature. The extractive desulfurization mechanism of ionic liquid was proposed. The effects of extractive conditions on desulfurization of gasoline was investigated. The used ionic liquids can be regenerated by re-extraction using tetrachloromethane and reused five times. 相似文献
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以实验室合成的Zn[C6H11NO]3Cl2、N-甲基咪唑溴化物、Zn[CO(NH3)2]3Cl2、1-丁基-3-甲基咪唑四氟硼酸盐和磷酸酯类离子液体作为脱硫萃取剂,H2O2-冰醋酸体系作为氧化剂,采用"一锅法"对直馏柴油进行脱硫,考察了离子液体种类和用量、H2O2和冰醋酸用量、反应时间及氧化温度对脱硫率的影响。结果表明,磷酸酯类离子液体对直馏柴油的脱硫效果相对较好,在离子液体体积分数为20%、H2O2体积分数为8%、冰醋酸体积分数为4%、20 min、80℃条件下,柴油中硫质量分数由1425 μg/g降至676 μg/g,脱硫率达到52.6%;且回收的离子液体使用5次,其脱硫效率仍达到40%以上。 相似文献
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Abstract Six Lewis acid ionic liquids were synthesized and employed as extractants for desulfurization of the model oil containing dibenzothiophene (DBT). Very promising ionic liquid was 1-butyl-3-methylimidazolium chloride-FeCl3 ([bmim]Cl/FeCl3), which performed best in the studied ionic liquids under the same operating conditions. It can remove DBT from model oil after continuous extraction for four steps, and the desulfurization efficiency can reach 97.9% under mild reaction conditions. Other sulfur-containing compounds were also investigated. The used ionic liquid could be regenerated six times without a significant decrease in activity. 相似文献