Alkylation of p-Cresol with Isobutylene Catalyzed by Heteropoly Acid Supported on MCM-41 Catalyst

Liu, Zai Man; Deng, Pei Pei; Li, Bai Yu

doi:10.4028/www.scientific.net/amr.356-360.2803

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…The separation of 2,6-xylenol/cresol mixtures has been explored by adsorption using zeolites or ion-exchange resins, and crystallization using adductive agents . The separation of p-cresol/m-cresol mixtures has been studied by high-pressure crystallization, extractive crystallization using solvent, extractive distillation using reactive entrainer, alkylation using strong acid as catalyst, , adsorption using modified HZSM-pellets or zeolites, extraction using ionic liquid, − and cocrystallization through complex formation. − …”

Section: Introductionmentioning

confidence: 99%

Purification of p-Cresol, o-Cresol, m-Cresol, and 2,6-Xylenol from the Quaternary Mixture by Three-Phase Crystallization

Shiau

2023

Ind. Eng. Chem. Res.

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Three-phase crystallization (TPC) was applied in this work to purify the major component from quaternary liquid mixtures consisting of p-cresol, o-cresol, m-cresol, and 2,6-xylenol. As TPC is operated in a series of three-phase transformations by decreasing temperature and reducing pressure, TPC combines melt crystallization and vaporization to produce the major component crystalline product along with the vapor mixture from the liquid mixture. A model based on the van't Hoff equation and Raoult's law coupled with mass and energy balances was proposed to determine a series of three-phase transformation conditions, which were adopted to direct the batch TPC experiments. The experimental purity and recovery ratio of the final product for purification of pcresol, o-cresol, m-cresol, or 2,6-xylenol were compared with the calculated results predicted by the model. The order of difficulty for purification among p-cresol, o-cresol, m-cresol, and 2,6-xylenol was examined.

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Section: Introductionmentioning

confidence: 99%

Purification of p-Cresol, o-Cresol, m-Cresol, and 2,6-Xylenol from the Quaternary Mixture by Three-Phase Crystallization

Shiau

2023

Ind. Eng. Chem. Res.

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“…The most common separation methods of industrial cresol include the alkylation method, , the adsorption separation, , the extraction method, − complex crystallization, , and melt crystallization. , The alkylation method uses strong acids as the catalyst, resulting in serious equipment erosion. In addition, the process is complex and the energy consumption is high.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Optimization of a Novel Coupling Process for Industrial Cresol Separation

Xiao

Huang

et al. 2022

Ind. Eng. Chem. Res.

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m-Cresol and p-cresol, important chemical intermediates, are widely used in medicine and pesticides. The mixture of m-cresol and p-cresol is easily produced in the industrial scale. However, it is very difficult to separate the mixture due to the boiling point. In this work, a new coupling process route combining complex crystallization and melt crystallization was proposed for the mixture separation. The key parameters in terms of crystallization temperature, solvent dosage, complexing agent dosage, initial purity of p-cresol, and crystallization time are investigated. The response surface methodology was employed to optimize the proposed process. The results show that the m-cresol and p-cresol mixture can be effectively separated, where the purity is >99% and the yields of m-cresol and p-cresol are over 63% and 55% respectively. In addition, recovery of solvents and complexing agents is achieved. The coupling route is proven to be a simple, environment-friendly, and sustainable process to separate industrial cresol. This study provided a reference for the isomerization separation process.

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“…Due to its superiority, HPA is selected to produce acidic or redox catalysts and even bifunctional catalysts. Moreover, it had the advantages of facile modification, rapid regeneration, few pollution and having no corrosive action on devices [2]. So that HPA is supposed to be used as the catalyst with more researching value and developing prospect.…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis of Dimethyl Ether over Heteropoly Acids Catalyst

Wang

et al. 2012

AMR

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Heteropoly acide(HPA), as one kind of solid-super acid catalysts, has been researched and applied extensively. Using SBA-15 and ZSM-5 as carriers, HPA catalysts with different types and contents were applied in this work for the hydrolysis of dimethyl ether(DME). It had been found that ZSM-5 was a proper carrier, and its supported phosphotungstic acid exhibited relatively high catalytic activity in this low-temperature hydrolysis reaction.

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Alkylation of p-Cresol with Isobutylene Catalyzed by Heteropoly Acid Supported on MCM-41 Catalyst

Cited by 6 publications

References 13 publications

Purification of p-Cresol, o-Cresol, m-Cresol, and 2,6-Xylenol from the Quaternary Mixture by Three-Phase Crystallization

Purification of p-Cresol, o-Cresol, m-Cresol, and 2,6-Xylenol from the Quaternary Mixture by Three-Phase Crystallization

Analysis and Optimization of a Novel Coupling Process for Industrial Cresol Separation

Hydrolysis of Dimethyl Ether over Heteropoly Acids Catalyst

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