Deactivation of Ion Exchange Catalysts by Acetonitrile and Methylamine

doi:10.1007/S11244-011-9725-7

Paper

Deactivation of Ion Exchange Catalysts by Acetonitrile and Methylamine

Published Sep 7, 2011 · R. González, C. Fité, F. Cunill

Topics in Catalysis

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1

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Abstract

The deactivating effect of acetonitrile (ACN) and monomethylamine (MMA) on ion-exchange resins Amberlyst™ 35 WET and Amberlyst™ 15 WET in the ETBE synthesis at different temperatures and poison concentrations has been studied. Deactivation is enhanced at high temperature and high poison concentration. MMA presents a higher deactivating effect than ACN. Amberlyst™ 35 WET is more active, and presents a higher resistance to deactivation than Amberlyst™ 15 WET. At integral regime, a stochiometric ratio of the fed poison and the active centers has been determined. At differential regime, two different periods have been observed as deactivation progresses, and an empirical expression of the exponential activity decay for Amberlyst™ 35 WET is proposed.

Study Snapshot

Acetonitrile and monomethylamine deactivate ion-exchange resins AmberlystTM 35 WET and AmberlystTM 15 WET in the ETBE synthesis process, with MMA showing a higher deactivating effect than ACN.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Deactivation of Ion Exchange Catalysts by Acetonitrile and Methylamine

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References

New polystyrene sulfonic acid resin catalysts with enhanced acidic and catalytic properties

Halogenation of polystyrene sulfonic acid resins enhances their acidic and catalytic properties, but low pore volume limits their catalytic activity in non-swelling solvents.

Options for nitriles removal from C4–C5 cuts: 3. Catalytic hydrogenation using the swing reactive removal process

The swing reactive removal process effectively removes nitriles from C4-C5 cuts, enabling the preparation of oxygenates like MTBE, ETBE, and TAME without compromising catalyst performance.

Drying of Acidic Macroporous Styrene−Divinylbenzene Resins with 12−20 Cross-Linking Degree

Drying of acidic macroporous styrene-divinylbenzene resins in a cross-circulation air-dryer reveals a diffusion mechanism, with an activation energy of 21 1 kJ/mol and adsorption enthalpy of

Catalyst deactivation by acetonitrile in MTBE synthesis

Acetamide formation in MTBE synthesis leads to a direct relationship between acetamide yield and catalyst activity loss.

Oxygenate fuels: Market expansion and catalytic aspect of synthesis

Oxygenate fuels, such as MTBE and ETBE, have become increasingly popular as fuel additives due to technical and legislative motivations, offering specific advantages in meeting clean fuel requirements.

Citations

Kinetics of the simultaneous syntheses of ethyl tert-butyl ether (ETBE) and butyl tert-butyl ether (BTBE) over AmberlystTM 35

The best mechanistic equation for the simultaneous syntheses of ethyl tert-butyl ether (ETBE) and butyl tert-butyl ether (BTBE) over AmberlystTM 35 is an ER-type mechanism, where an alcohol molecule adsor