scholarly journals Novel Short Process for p-Xylene Production Based on the Selectivity Intensification of Toluene Methylation with Methanol

ACS Omega ◽  
2021 ◽  
Author(s):  
Dongliang Wang ◽  
Junqiang Zhang ◽  
Peng Dong ◽  
Guixian Li ◽  
Xueying Fan ◽  
...  
Keyword(s):  
Toluene Methylation

Aromatic Transformation in Fluidized Bed Reactors

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1061-1088
Author(s):  
Sule Rabiu ◽  
Sulaiman Al-Khattaf
Keyword(s):  
Fluidized Bed ◽  
The Other ◽  
Fluidized Bed Reactors ◽  
Y Zeolite ◽  
Y Zeolites ◽  
Toluene Disproportionation ◽  
Xylene Isomerization ◽  
Toluene Methylation ◽  
Toluene Conversion ◽  
Medium Acidity

In this work three important aromatic transformations, namely: toluene disproportionation, toluene methylation and m-xylene isomerization, were investigated in a riser simulator which closely mimics the operation of commercial fluidized bed reactors. The transformations were studied over a ZSM-5 based catalyst with medium acidity of 0.23 mmol/g and a series of Y zeolites of acidities between 0.55 and 0.03 mmol/g. For pure toluene feed, it was observed that conversion over the ZSM-5 based catalyst and the weakly acidic Y zeolite (USY-1) was very low. However, with the highly acidic Y zeolite (H-Y), significant toluene conversion was observed with paring reaction more prominent than disproportionation. On the other hand, when toluene was alkylated with methanol, higher toluene conversions were achieved over both the ZSM-5 based and the weakly acidic USY-1 catalysts as compared to when pure toluene feed was used. In addition, p-xylene/o-xylene (P/O) ratios higher than the equilibrium values were obtained in the reaction product over both catalysts. Finally, for m-xylene isomerization it was found that m-xylene conversion increased initially as the acidity of the catalyst increased up to 0.1 mmol/g beyond which any further increase in acidity resulted in a slight decrease in the m-xylene conversion.

scholarly journals TOLUENE METHYLATION ON THE MODIFIED ZEOLITE CATALYSTS

2020 ◽  
Vol 1 (439) ◽  
pp. 123-127
Author(s):  
A.T. Massenova ◽  
◽  
M.K. Kalykberdiyev ◽  
A.S. Zhumakanova ◽  
A.S. Sass ◽  
...  
Keyword(s):  
Zeolite Catalysts ◽  
Modified Zeolite ◽  
Toluene Methylation

Intensification of an Irreversible Process using Reactive Distillation– Feasibility Studies by Residue Curve Mapping

2021 ◽  
Vol 9 (11) ◽  
pp. 1704-1710
Author(s):  
Shuwana Tasleem
Keyword(s):  
Distillation Column ◽  
Irreversible Process ◽  
Reactive Distillation ◽  
Feasibility Studies ◽  
Future Research ◽  
Phase Reaction ◽  
Toluene Methylation ◽  
Residue Curve Maps ◽  
Reaction Processes ◽  
Liquid Phase Reaction

Abstract: Reactive distillation processes are very promising in substituting Sconventional liquid phase reaction processes. However this technology is not suitable for all kind of processes or types of reaction. Therefore, assessing the feasibility of these process concepts forms an important area in current and future research and development activities. The present paper focuses on the feasibility studies based on the construction of residue curve maps for the toluene methylation system. The RCMs were constructed and analyzed; it is concluded that the process of synthesis of xylenes when carried out in the reactive distillation column enhances the selectivity of the desired para isomer. Keywords: Reactive Distillation, Residue Curve Maps, Feasibility Study, Toluene Methylation, Aspen Plus

Toluene methylation on AlPO4-Al2O3 catalysts (5–15 wt.% Al2O3)

1996 ◽  
Vol 57 (1) ◽  
pp. 61-70 ◽  
Author(s):  
F. M. Bautista ◽  
J. M. Campelo ◽  
A. Garcia ◽  
D. Luna ◽  
J. M. Marinas ◽  
...  
Keyword(s):  
Toluene Methylation

Mass Transfer Advantage of Hierarchical Zeolites Promotes Methanol Converting into para-Methyl Group in Toluene Methylation

2017 ◽  
Vol 56 (33) ◽  
pp. 9310-9321 ◽  
Author(s):  
Jian Zhou ◽  
Yangdong Wang ◽  
Wei Zou ◽  
Chuanming Wang ◽  
Liyuan Li ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Hierarchical Zeolites ◽  
Methyl Group ◽  
Toluene Methylation

Toluene methylation over ici zeolite fu-1

1984 ◽  
Vol 9 (1) ◽  
pp. 53-61 ◽  
Author(s):  
David G. Parker
Keyword(s):  
Toluene Methylation

Methanol Usage in Toluene Methylation over Pt Modified ZSM-5 Catalyst: Effects of Total Pressure and Carrier Gas

2017 ◽  
Vol 56 (16) ◽  
pp. 4709-4717 ◽  
Author(s):  
Yiren Wang ◽  
Min Liu ◽  
Anfeng Zhang ◽  
Yi Zuo ◽  
Fanshu Ding ◽  
...  
Keyword(s):  
Total Pressure ◽  
Carrier Gas ◽  
Toluene Methylation
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