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Qualitative treatment of catalytic hydrolysis of alkyl formates

Paper ID Volume ID Publish Year Pages File Format Full-Text
41932 45905 2010 9 PDF Available
Title
Qualitative treatment of catalytic hydrolysis of alkyl formates
Abstract

Liquid-phase hydrolysis of alkyl formates was performed in a stirred batch reactor using formic acid as a homogenous catalyst, cation exchange resin as heterogeneous catalyst and an additive as a complexation agent. The catalysts increased the rate of the reaction considerably, but the equilibrium conversion was slightly suppressed by the homogenous catalyst. The additive not only accelerated the reaction rate, but also improved the yield significantly. The effect of external and internal mass transfer limitations present in the heterogeneous reaction steps was investigated and it was observed that there is the existence of internal diffusion limitation for the largest catalyst particles. Other parameters such as temperature, catalyst pre-treatment, catalyst loading and stirring speed were investigated in order to optimize the process. The experiments also demonstrated that the ion exchange resin can be reused more than once.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (80 K)Download as PowerPoint slideResearch highlights▶ Formic acid increases reaction rate but suppresses yield slightly. ▶ The additive, X increases both reaction rate and yield. ▶ Internal diffusion is present in the large particle of the resin. ▶ The catalyst can be used more than once.

Keywords
AMR, amberlite IR-120 resins; CX, adduct (complex formed between formic acid and additive); DVB, divinyl benzene; EFH, ethyl formate hydrolysis; MFH, methyl formate hydrolysis; EtFo (A), ethyl formate; EtOH (D), ethanol; FA (C), formic acid; FAC, formic a
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 384, Issues 1–2, 20 August 2010, Pages 36–44
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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