Solid Formation during Composite-Ionic-Liquid-Catalyzed Isobutane Alkylation
Solid Formation during Composite-Ionic-Liquid-Catalyzed Isobutane Alkylation
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DOI：
10.1021/ef500684r
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发表时间：
2014-07
期刊：
影响因子：
5.3
通讯作者：
Hao Ma;Rui Zhang;X. Meng;Zhichang Liu;Haiyan Liu;Chunming Xu;Ren-Jie Chen;P. A. A. Klusener-P.-A.-A.-Klusener-9
中科院分区：
文献类型：
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作者：
Hao Ma;Rui Zhang;X. Meng;Zhichang Liu;Haiyan Liu;Chunming Xu;Ren-Jie Chen;P. A. A. Klusener-P.-A.-A.-Klusener-9
以盐酸三乙胺、无水氯化铝和氯化亚铜为原料制备的复合离子液体是一种新型的异丁烷烷基化催化剂。该复合离子液体烷基化（CILA）工艺可制得产物分布良好的烷基酸盐。CILA是一种很有前途的替代硫酸和氢氟酸烷基化技术。但烷基化过程中会形成一些固体，且固体量随反应时间的延长而增加。在许多分离步骤中，将使用过的CIL分为液体和固体。核磁共振、x射线衍射、x射线光电子能谱和元素分析对这些组分进行了表征。研究了固体中酸溶性油（ASO）的含量。结果表明，该固体主要为氯化亚铜，ASO含量约为1wt %。氯化铝的损失和CuCl作为固体形式从CIL中脱离，导致CIL的酸度和产物选择性下降。
Composite ionic liquid (CIL) prepared from triethylamine hydrochloride, anhydrous aluminum(III) chloride, and cuprous chloride is a new catalyst for isobutane alkylation. This composite ionic liquid alkylation (CILA) technology yields an alkylate with favorable product distribution. CILA is a promising replacement for sulfuric acid and hydrofluoric acid alkylation technologies. However, some solids are formed during alkylation, and solid amount increases with time on stream. In a number of separation steps, the used CIL was divided into liquid and solid. Nuclear magnetic resonance, X-ray diffraction, X-ray photoelectron spectroscopy, and elemental analyses were applied to characterize these fractions. The content of acid-soluble oil (ASO) in solid was also investigated. The results showed that the solid was mainly cuprous chloride and contained about 1 wt % ASO. The loss of aluminum chloride and detachment of CuCl as a form of solid from CIL resulted in the decrease of CIL acidity and product selectivity.