Positive effect of secondary structure creation in mordenites on alkylation of benzene with 1-tetradecene

Horňáček, Michal; Hudec, Pavol; Velebná, Klaudia; Lovás, Peter

doi:10.1016/j.catcom.2015.01.018

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…Among the isomers of LAB, 2-LAB exhibits the highest biodegradability, making it a dominant detergent intermediate. [6][7][8] HF or AlCl 3 was commonly used as a homogenous catalyst in the industrial production of LAB. This kind of catalysts showed serious problems including environment contamination, equipment corrosion, difficult separation, and low 2-LAB selectivity.…”

Section: Introductionmentioning

confidence: 99%

Durability enhanced ionic liquid catalyst for Friedel–Crafts reaction between benzene and 1-dodecene: insight into catalyst deactivation

Wan

Zhang

et al. 2015

RSC Adv.

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Friedel-Craft alkylation of benzene with 1-dodecene, which is an important reaction of synthetic detergent, was studied using the catalyst of [bmim][TFSI]/AlCl3 (1-butyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide/AlCl3). These ionic liquid catalysts show biphasic behaviors at specific condition. Active site species and Lewis acidity were determined by NMR and acetonitrile probe FT-IR. NMR spectroscopy investigations indicated that "Coordinated" and "uncoordinated"[TFSI]existed in the ionic liquid catalyst system sumultaneity, while tetrahedral 4-coordinate Al2Cl7was the main active specie for Friedel-Craft alkylation. The complexation [AlClx(TFSI)y]tend to decompose and release 4-coordinated Al2Cl7and [TFSI] -. The phase behaviors study of the ionic liquid [bmim][TFSI]/AlCl3 demonstrated that the upper phase could be used as an efficient heterogeneous catalyst when AlCl3/IL≥1.5. Due to the presence of anion [TFSI]around active sites, especially [TFSI]at "uncoordinated" state, ionic liquid formed a stable and hydrophobic chemical environment, which enhanced catalysts durability. The influence of various reaction conditions including catalyst reusability on the alkylation reaction was studied, and the potential reasons to catalyst deactivation were discussed. The highest 2-LAB selectivity was more than 50% when 1-dodecene conversion was nearly 100%. Comparing with liquid or solid acid catalyst, ionic liquid catalysts have many advantages in perspectives concerning energy and environmental.

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Section: Introductionmentioning

confidence: 99%

Durability enhanced ionic liquid catalyst for Friedel–Crafts reaction between benzene and 1-dodecene: insight into catalyst deactivation

Wan

Zhang

et al. 2015

RSC Adv.

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“…Recently, it has been observed that changes in the morphologies and mesoporosities of the zeolite crystals strongly influence the activity and selectivity in alkylation reactions [53][54][55][56][57][58][59][60][61][62]. Wang et al [53] showed that the conversion of ethylene over MCM-22 zeolite nanoplates is higher than that over MCM-22 zeolite microspheres.…”

Section: Ethylbenzene Processes With Lower Consumption Of Energy and Materialsmentioning

confidence: 99%

“…Studies of benzene alkylation over mesoporous zeolites show that zeolites with abundant mesopores are more active than conventional zeolites [55][56][57][58][59][60][61]. Figure 6 shows a comparison of ethylene conversions using conventional MCM-22 and mesoporous MCM-22 prepared at various SiO2/Al2O3 molar ratios [58].…”

Section: Ethylbenzene Processes With Lower Consumption Of Energy and Materialsmentioning

confidence: 99%