Kinetik der Umesterung von Ethanol und Butylacetat – Ein Modellsystem für die Reaktivrektifikation

Schmidt, Jörg; Reusch, Dieter; Elgeti, Klaus; Schomäcker, Reinhard

doi:10.1002/cite.330710711

Cited by 24 publications

(9 citation statements)

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“…Aktuelle Arbeiten behandeln vor allem Toxizitätsuntersuchungen [8] und Ökobilanzierungen [9]. Anhand einer kinetisch gut untersuchten und charakterisierten Modellreaktion [10], der Umesterung von Butanol mit Ethylacetat zu Ethanol und Butylacetat, wurde die Anwendung ionischer Flüssigkeiten als homogener Katalysator kinetisch und reaktionstechnisch untersucht [11]. Dabei …”

Section: Einführungunclassified

Eco‐Balance Assessment of Ionic Liquids as Acid Catalysts in Transesterifications

Kuschnerow

Wesche

Scholl

2011

Chemie Ingenieur Technik

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Eco-Balance Assessment of Ionic Liquids as Acid Catalysts in TransesterificationsIonic Liquids may act as homogeneous catalysts for transesterification processes. In contrast to conventional catalysts the ionic liquid may be separated after reaction and recycled. This study investigated the ecological effect of changing from sulfuric acid as catalyst to an ionic liquid. Three different eco-balance approaches have been applied. The EHS method proved to be the most suited tool to assess the ecological potential of process alternatives in the conceptual process design phase. Keywords

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Section: Einführungunclassified

Eco‐Balance Assessment of Ionic Liquids as Acid Catalysts in Transesterifications

Kuschnerow

Wesche

Scholl

2011

Chemie Ingenieur Technik

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“…1) was chosen. The reaction is representative of a large number of similar and technically interesting transesterification reactions and its reaction characteristics are well documented [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…The reaction is reversible and its equilibrium constant is approximately 1. Thus, thermodynamically, neither the products nor the reactants are particularly preferred [2]. As test reaction for this study, the transesterification of butanol with ethyl acetate to butyl acetate and ethanol ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Continuous Transesterification with Acidic Ionic Liquids as Homogeneous Catalysts

et al. 2013

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Ionic liquids (ILs) are recyclable acid catalysts for transesterification reactions. In the present study, different acidic ILs were examined in this reaction, with special focus on their recyclability. Furthermore, the IL-catalyzed transesterification reaction was realized in continuous operation. A miniplant reactor with technically representative design and operating characteristics was used for this study. The applied rig has a volume of 5 L and an external thermosyphon reboiler. The miniplant reactor can be operated in batch and in continuous mode. ILs functionalized with a sulfonic acid group were found to be the most suitable IL catalysts for the transesterification reactions under investigation. Using these ILs, reaction rates as high as for H 2 SO 4 could be realized. Moreover, the IL catalyst was demonstrated to be active for at least 1000 h of operation time.

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“…The transesterification reaction can be performed using various types of catalysts, such as acid (sulfuric, sulfonic, phosphoric and hydrochloric acids), or basic (potassium and sodium hydroxides, metal alkoxides or hydrotalcites), but heterogeneous catalysts are now preferred in order to avoid neutralization and separation steps [15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Transesterification of waste frying oil using a zinc aluminate catalyst

Alves

Oliveira

Carneiro

et al. 2013

Fuel Processing Technology

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The transesterification of waste frying oil (WFO) with methanol and ethanol was studied in a batch reactor using a zinc aluminate catalyst prepared by the combustion reaction method. The reaction runs were carried out for 2 hours, using alcohol:oil molar ratio of 40:1, temperature range of 60-200°C, catalyst ratio of 1-10% wt., under 700 rpm stirring. The catalyst was characterized by XRD, EDX, TG, FTIR, N 2 physisorption, NH 3and CO 2-TPD. The catalyst showed a normal spinel structure and acid character (Lewis acid), in spite of the presence of both strong acid and base sites. Methyl and ethyl esters yields higher than 95% were obtained at 150 and 200°C and the catalyst was recovered and reused in 3 reaction cycles, without significant loss of activity.

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Kinetik der Umesterung von Ethanol und Butylacetat – Ein Modellsystem für die Reaktivrektifikation

Cited by 24 publications

References 0 publications

Eco‐Balance Assessment of Ionic Liquids as Acid Catalysts in Transesterifications

Eco‐Balance Assessment of Ionic Liquids as Acid Catalysts in Transesterifications

Continuous Transesterification with Acidic Ionic Liquids as Homogeneous Catalysts

Transesterification of waste frying oil using a zinc aluminate catalyst

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