Low temperature isomerization of light naphtha (С5-С6).
Platinum-based catalyst for light naphtha low-temperature isomerization is applied in refining for production of Euro-5 fuels. Catalyst AOK-72-55 allows increasing the octane rating from 63-68 to 91-92 RON.
AOK-72-55 is based on sulfated zirconia to provide the target acidity and distribution of the active component. Catalyst features high stability of operation and extended lifetime (8-12 years).
Catalyst АОК-72-55 is available in the form of cylindrical extrudates.
Catalyst AOK-72-55 is used as a fixed bed in one-, two- and three-reactor circuits of isomerization units. The catalyst can be operated most effectively in isomerization recycle plants.
Catalyst AOK-72-55 is operated within low-temperature range (130-180 °C) and is more advantageous for naphthenic ring-opening, providing higher isomerization recycle plant performance. АОК-72-55 is also effective for benzene removal.
AOK-72-55 can be used as alternative to chlorinated and zeolite isomerization catalysts. Moreover, the switching from a chlorinated isomerization catalyst to a zirconium sulfate does not require a major modification in the plant process flow or the purchase of extra equipment.
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