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Iso-hexanes and Isopentane: Light Straight-Run Gasoline Isomerised over Platinum-Alumina with Hydrogen (Gulf, US 3,071,535)
The lightest straight-run gasoline is mostly straight-chain pentane and hexane, of low octane. Rearranged into their branched forms over a platinum catalyst with hydrogen, they become isopentane and iso-hexanes, high in both research and motor octane.
Result (Gulf's example, barrels per day): from 7,549 of light straight-run gasoline, 2,873 of isopentane and 2,792 of iso-hexanes, plus 1,796 of isoheptanes split off beforehand.
Source: Condrasky & Glazier, US 3,071,535 (Gulf, filed 1959). Not given: temperature, pressure, space velocity. Hydrogen and light hydrocarbons: fire risk. Picture drawn by Youblob.
Esperto
1 day
Istruzioni
1
1
Split off the isoheptanes
Split off the isoheptanes
Prefractionate the light straight-run gasoline (C5-190 °F, 7,549 barrels a day) to separate isoheptanes and heavier, 1,796, which go to hydrogen treating, from the C5-C6 paraffins.
Materiali per questo passaggio:
Benzina leggera di prima distillazione7549 parts by volumeStrumenti necessari:
Alambicco di frazionamento
Serbatoio per petrolio2
2
Split the C5-C6 into pentane and hexane cuts
Split the C5-C6 into pentane and hexane cuts
Distil the C5-C6 fraction into a concentrated normal-pentane cut and a cut concentrated in normal hexane and methylpentanes.
Strumenti necessari:
Alambicco di frazionamento3
3
Isomerise each cut over platinum-alumina with hydrogen
Isomerise each cut over platinum-alumina with hydrogen
Isomerise the two cuts separately over a halogen-promoted platinum-alumina catalyst with hydrogen. Gulf uses off-gas from its platinum reformer, 360,000 cubic feet a day. Gulf gives no temperature or pressure.
Strumenti necessari:
Catalizzatore di reforming al platino
Reattore tubolare a letto fisso
Idrogeno
Manometro
Pirometro4
4
Fractionate and recycle the unconverted
Fractionate and recycle the unconverted
Fractionate the reactor effluent. Send unconverted normal pentane, normal hexane and methylpentanes back to the reactors. Keep the isopentane (2,873) and iso-hexanes (2,792) for blending; 156 goes to fuel gas.
Strumenti necessari:
Alambicco di frazionamentoSerbatoio per petrolioMateriali
1- 7549 parts by volumeSegnaposto
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Questi blueprint condividono conoscenze — tecniche, materiali o principi
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