Overview
ABSTRACT
A renewed interest for paraffin isomerization appeared with the introduction of lead-free fuels in order to address atmospheric pollution. The high-octane isomerate being an ideal diluent for other bases of fuels, the demand is to become preponderant. Within this context, the simple isomerization technologies and recycling by superfractionation can be unsatisfactory, thus allowing processes with recycling obtained by separation on a molecular sieve to become prevalent despite their energy consumption and higher investment costs.
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Laurent WATRIPONT: Engineer from ENSPM (National School of Petroleum and Engines) - Technical Manager – Technology Department – Axens – IFP Group Technologies
INTRODUCTION
The isomerization of normal paraffins (or linear alkanes) with four, five, and six carbon atoms into isoparaffins (or branched alkanes) with better anti-knock properties is used to obtain high-octane products for fuel formulation, mainly from straight-run distillates of petroleum (petroleum fractions 30 – 80 °C), or from C 4 fractions in the case of n-butane, leading to the production of isobutane, a basic reagent for the aliphatic alkylation process. .
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Isomerization of paraffins
Paraffin isomerization reaction
Bibliographic references
Available for consultation in our document databases
GUISNET (M.) – Acid-base catalysis
GUISNET (M.) – . Heterogeneous catalysis. Mode of action of catalysts.
MACACHE (C.) – . Heterogeneous catalysis in industrial processes.
FOURNIER (G.) and JOLY (J.-F.) – Catalytic reforming
TORCK (B.) – Alkylation of olefins by paraffins...
Patents
The main patents relating to paraffin isomerization are cited in the bibliographical references. .
You may also consult:
"High activity isomerization catalyst and process." United States Patent No. 6881873, issued on April 19, 2005.
"Fractionation of paraffin isomerization process...
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