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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.
Dalubhasa
1 day
Mga Tagubilin
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.
Mga materyales para sa hakbang na ito:
Magaang straight-run gasoline7549 parts by volumeMga kailangang kasangkapan:
Alambike ng paghati-hati
Tangke ng langis2
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.
Mga kailangang kasangkapan:
Alambike ng paghati-hati3
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.
Mga kailangang kasangkapan:
Platinum na Reforming Catalyst
Fixed-bed na tubular reactor
Haydroheno
Panukat ng Diin
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.
Mga kailangang kasangkapan:
Alambike ng paghati-hatiTangke ng langisMga Materyales
1- 7549 parts by volumePlaceholder
Mga Kinakailangang Kasangkapan
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Ang blueprint na ito ay gumagawa ng
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Heavy Gas Oil: the 620-1,050 °F Cut from Atmospheric and Vacuum Distillation of Crude Oil (Gulf, US 3,071,535)
ni Charlie
Industriyal
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0
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Mapanganib
Platinum Reforming Catalyst: 0.1 % Platinum and 1.5 % Fluorine on Alumina (Haensel, UOP, US 2,479,110)
ni Charlie
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Reformate: Straight-Run Naphtha over Platinum-Alumina-Fluorine Catalyst at 874 °F and 500 psi (Haensel, UOP, US 2,479,110)
ni Charlie
Industriyal
6
0
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