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Abstract <p>The formation sequence of trimethylpentane (TMP) isomers in the liquid-phase interaction of butyl triflates and butenes with isobutane was studied. In the composition of alkylation products, the fractions of TMP isomers increased in the order 2,2,4-TMP &gt; 2,3,4-TMP &gt; 2,3,3-TMP <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10975_2025_8581_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="21" /> </InlineMediaObject> <EquationSource Format="TEX">\( \gg \)</EquationSource> <!--KinCat2560079Katsman-m1--> </InlineEquation> 2,2,3-TMP upon homogeneous interaction in isobutane or in the order 2,3,4-TMP &gt; 2,3,3-TMP &gt; 2,2,4-TMP <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10975_2025_8581_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="21" /> </InlineMediaObject> <EquationSource Format="TEX">\( \gg \)</EquationSource> <!--KinCat2560079Katsman-m2--> </InlineEquation> 2,2,3-TMP in the isobutane–triflic acid two-phase system. The isomeric composition approached the composition of a usual commercial product with increasing reaction time mainly owing to the isomerization of 2,3,4-TMP and 2,3,3-TMP isomers into a 2,2,4-TMP isomer. The possible mechanisms of formation of primary reaction products were discussed. These products are 2,2,4-TMP and 2,2,3-TMP in the case of butenes and 2,3,4-TMP and 2,3,3-TMP in the case of butyl triflates.</p>

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The Mechanism of Formation of Trimethylpentanes from Esters in Liquid-Phase Alkylation of Isobutane with Butenes

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • E. A. Katsman

摘要

Abstract

The formation sequence of trimethylpentane (TMP) isomers in the liquid-phase interaction of butyl triflates and butenes with isobutane was studied. In the composition of alkylation products, the fractions of TMP isomers increased in the order 2,2,4-TMP > 2,3,4-TMP > 2,3,3-TMP \( \gg \) 2,2,3-TMP upon homogeneous interaction in isobutane or in the order 2,3,4-TMP > 2,3,3-TMP > 2,2,4-TMP \( \gg \) 2,2,3-TMP in the isobutane–triflic acid two-phase system. The isomeric composition approached the composition of a usual commercial product with increasing reaction time mainly owing to the isomerization of 2,3,4-TMP and 2,3,3-TMP isomers into a 2,2,4-TMP isomer. The possible mechanisms of formation of primary reaction products were discussed. These products are 2,2,4-TMP and 2,2,3-TMP in the case of butenes and 2,3,4-TMP and 2,3,3-TMP in the case of butyl triflates.