Alkylation of phenol with tert-butyl alcohol over dealuminated HMCM-68 zeolites

Li, Jintao; Lou, Lan‐Lan; Yang, Yichun; He, Huan; Liu, Shuangxi

doi:10.1016/j.micromeso.2015.01.003

Cited by 14 publications

(8 citation statements)

References 31 publications

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“…The catalytic activity on micropore zeolite (HY [44], Hβ [45], ZSM-5 [46]), mesopore molecular sieve (AlMCM-41) [47], and hierarchical zeolite (MZ-9-3.2) [21] are compared in Table 1. The difference in the activity could be mainly attributed to their different pore structure property and acidity.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Phenol Tert-Butylation Reaction Activity over Hierarchical Porous Silica-Alumina Materials

Wang

Xiu

et al. 2020

Catalysts

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Hierarchical aluminum-silicon materials have been successfully prepared by mixing pre-crystallization of silica-alumina sol and citric acid under hydrothermal conditions. The influence of pre-crystallization time on the micro-mesoporous structure is studied using Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), N2 physical adsorption, and high-resolution transmission electron microscopy (HRTEM). The catalytic performance of hierarchical silica-alumina material is evaluated by alkylation of phenol with tert-butanol. The results show that the silica-alumina materials with a pre-crystallization time of 16 h show micro-mesoporous structure and excellent catalytic activity.

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Section: Resultsmentioning

confidence: 99%

Enhanced Phenol Tert-Butylation Reaction Activity over Hierarchical Porous Silica-Alumina Materials

Wang

Xiu

et al. 2020

Catalysts

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“…MCM-68 zeolite has been widely used for many applications such as enhancing the formation of propylene in hexane cracking and alkylation of naphthalene with propene, 1-butene, and 2-methylpropene to give 2,6-dialkylnapthalene. It also has been employed in the alkylation of phenol with tert -butyl alcohol to give ortho - tert -butyl phenol (2-TBP), para- tert -butyl phenol (4-TBP), and 2,4-di tert -butyl phenol (2,4-DTBP); and in isopropylation of biphenyl to give shape selective isomers of diisopropylbiphenyl . The shape selectivity properties of the SSZ-56 (SFS) zeolite have been tested for hydroisomerization of n -hexane .…”

Section: Methodsmentioning

confidence: 99%

Diffusion of Trimethylbenzenes and Xylenes in Zeolites with 12- and 10-Ring Channels as Catalyst for Toluene-Trimethylbenzene Transalkylation

2016

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A molecular dynamics study of the diffusion of trimethylbenzene (TMB) and xylene molecules involved in toluene and TMB transalkylation reaction has been performed over 6 different pure-silica zeolites, containing 10- and 12-ring channels: BOG, MSE, IWR, SFS, SOF, and UWY. The shape selective properties of these six frameworks have been tested using two different loadings: one loading characteristic of the early stage and another of the late stage of the reaction. The collected data explains the diffusion behavior of these molecules in the zeolite frameworks and allows researchers to obtain trends and also rationalize their performance as candidates for the selective production of p-xylene during transalkylation of toluene and TMB. UWY appears a promising zeolite that allows the reaction of the TMBs in the 12-ring channels, is able to host the transition states, and favors the preferential diffusion of p-xylene in the 10-ring channels.

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“…1 Zeolites, heteropolyacids, and other acidic heterogeneous catalysts provide a strong alternative to traditional homogeneous acids, effectively mitigating reactor corrosion and allowing for ease of separation. [2][3][4][5][6] Although heterogeneous catalysis offers a wealth of tools toward economically and environmentally friendly alternatives, the production of alkylated aromatics remains solely dependent on petroleum as the required raw material. In recent years, immense research endeavors toward the use of renewable sources, such as biomass, as raw materials for the production of aromatics are highlighted in the open literature.…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, separation and purification steps of the final product require aqueous quenching as well as reactive extraction steps to neutralize and remove the acid compounds, which in turn results in large quantities of hazardous waste 1 . Zeolites, heteropolyacids, and other acidic heterogeneous catalysts provide a strong alternative to traditional homogeneous acids, effectively mitigating reactor corrosion and allowing for ease of separation 2‐6 . Although heterogeneous catalysis offers a wealth of tools toward economically and environmentally friendly alternatives, the production of alkylated aromatics remains solely dependent on petroleum as the required raw material.…”

Section: Introductionmentioning

confidence: 99%

Toward the coupling of microbial biosynthesis and catalysis for the production of alkylated phenolic compounds

Zuber

Wang

et al. 2020

AIChE Journal

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In the present study, petroleum-free production of alkylated phenols from glycerol was achieved by judicious use of microbial biosynthesis and heterogeneous catalysis with the aim to advance biomass conversion to industrially relevant chemical products. First, metabolically engineered bacterium Escherichia coli was adopted to convert glycerol to phenol. Biophenol was then extracted from the cell culture using select polymeric resins. Desorption of phenol was achieved with tertiary butyl alcohol, which serves also as a reactant in subsequent heterogeneous catalytic reaction. The adopted resins were also compared as catalysts for alkylation of phenol to tert-butyl phenolic products. Interestingly, the resins exhibited different phenol adsorption and catalytic reactivities. The holistic approach developed by this study offers a unique opportunity to synthesize end products directly from glycerol that cannot be achieved in such an efficient manner (i.e., low temperature, low pressure, and high selectivity) by using microbial biosynthesis or heterogeneous catalysis approaches alone.

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Alkylation of phenol with tert-butyl alcohol over dealuminated HMCM-68 zeolites

Cited by 14 publications

References 31 publications

Enhanced Phenol Tert-Butylation Reaction Activity over Hierarchical Porous Silica-Alumina Materials

Enhanced Phenol Tert-Butylation Reaction Activity over Hierarchical Porous Silica-Alumina Materials

Diffusion of Trimethylbenzenes and Xylenes in Zeolites with 12- and 10-Ring Channels as Catalyst for Toluene-Trimethylbenzene Transalkylation

Toward the coupling of microbial biosynthesis and catalysis for the production of alkylated phenolic compounds

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