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Application of a combined fibrous coalescence technique in deep purification separation of composite ionic liquid alkylation reaction products
Journal of Cleaner Production ( IF 9.7 ) Pub Date : 2020-03-25 , DOI: 10.1016/j.jclepro.2020.121290
Zhaojin Lu , Ziqiang Hu , Huiqing Luo , Zhishan Bai , Bin Zhang

Composite ionic liquid (CIL), as a novel green catalyst, has been successfully used for C4 alkylation to produce alkylate oil. However, owing to the large effluent discharge volumes (about 75000 tons per year) produced because of the difficulty in separating the CIL from emulsified reaction products in the alkylation production process, there is a requirement for a high-efficiency and rapid separation technique on an industrial scale to facilitate cleaner production. In this study, wettable and non-wettable woven fiber layers were combined to create a combined fibrous coalescer for emulsified composite ionic liquid alkylation (CILA) reaction products treatment. The laboratory research results indicated that the coalescer had the unique advantages of high separation performance and outstanding anti-blocking capability. Also, the separation efficiency could reach 99.6% at the superficial velocity of 0.5 m/min and the pressure drop across the fibrous beds was stable during the long cycle. The CIL concentration in the reaction products from the CILA industrial unit reduced from 3000 mg/L to below 20 mg/L, with a retention time of 7 min and a pressure drop of 40 KPa. The daily discharge of waste alkaline water and wastewater from the CILA industrial unit decreased by 60% and 58%, respectively, significantly reducing the volume of industrial effluent and associated environmental pollution, which are critical concerns in the treatment of CILA reaction products. In addition, these findings can facilitate further applications of CILA technology and significantly improve its environmental benefits.



中文翻译:

组合纤维聚结技术在复合离子液体烷基化反应产物深度纯化分离中的应用

复合离子液体(CIL),作为一种新型绿色催化剂,已成功用于C4烷基化生产烷基化油。然而,由于在烷基化生产过程中难以从乳化反应产物中分离CIL,产生的废水排放量大(每年约75,000吨),因此需要一种高效,快速的分离技术。工业规模,以促进清洁生产。在这项研究中,将可润湿和不可润湿的机织纤维层结合在一起,以形成一种组合的纤维聚结剂,用于乳化复合离子液体烷基化(CILA)反应产物的处理。实验室研究结果表明,聚结器具有分离性能高,抗结块能力强等独特优点。也,在0.5 m / min的表观速度下,分离效率可达到99.6%,并且在长周期内,穿过纤维床的压降是稳定的。CILA工业装置的反应产物中的CIL浓度从3000 mg / L降至20 mg / L以下,保留时间为7分钟,压降为40 KPa。CILA工业装置的碱性废水和废水的每日排放量分别减少了60%和58%,从而大大减少了工业废水的排放量和相关的环境污染,这是处理CILA反应产物的关键问题。此外,这些发现可以促进CILA技术的进一步应用并显着改善其环境效益。以5 m / min的速度通过纤维床的压降在长周期内保持稳定。CILA工业装置的反应产物中的CIL浓度从3000 mg / L降至20 mg / L以下,保留时间为7分钟,压降为40 KPa。CILA工业装置的碱性废水和废水的每日排放量分别减少了60%和58%,大大减少了工业废水的排放量和相关的环境污染,这是处理CILA反应产物的关键问题。此外,这些发现可以促进CILA技术的进一步应用并显着改善其环境效益。以5 m / min的速度通过纤维床的压降在长周期内保持稳定。CILA工业装置的反应产物中的CIL浓度从3000 mg / L降至20 mg / L以下,保留时间为7分钟,压降为40 KPa。CILA工业装置的碱性废水和废水的每日排放量分别减少了60%和58%,从而大大减少了工业废水的排放量和相关的环境污染,这是处理CILA反应产物的关键问题。此外,这些发现可以促进CILA技术的进一步应用并显着改善其环境效益。CILA工业装置的反应产物中的CIL浓度从3000 mg / L降至20 mg / L以下,保留时间为7分钟,压降为40 KPa。CILA工业装置的碱性废水和废水的每日排放量分别减少了60%和58%,从而大大减少了工业废水的排放量和相关的环境污染,这是处理CILA反应产物的关键问题。此外,这些发现可以促进CILA技术的进一步应用并显着改善其环境效益。CILA工业装置的反应产物中的CIL浓度从3000 mg / L降至20 mg / L以下,保留时间为7分钟,压降为40 KPa。CILA工业装置的碱性废水和废水的每日排放量分别减少了60%和58%,从而大大减少了工业废水的排放量和相关的环境污染,这是处理CILA反应产物的关键问题。此外,这些发现可以促进CILA技术的进一步应用并显着改善其环境效益。大大减少了工业废水的量和相关的环境污染,这是处理CILA反应产物的关键问题。此外,这些发现可以促进CILA技术的进一步应用并显着改善其环境效益。大大减少了工业废水的量和相关的环境污染,这是处理CILA反应产物的关键问题。此外,这些发现可以促进CILA技术的进一步应用并显着改善其环境效益。

更新日期:2020-03-26
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