$Pyrolysis of petroleum fractions - under pressure in presence of steam and methane to olefins and aromatics$

Pyrolysis of petroleum fractions - under pressure in presence of steam and methane to olefins and aromatics

In prodn. of lower olefine and aromatic-rich fractions in the petrol and kerosene boiling range, hydrocarbon fractions boiling at =450 degrees C (pref. straight-run petroleum fractions) are pyrolysed under pressure in presence of steam and methane or methane-rich gas. Cracking is pref. carried out u...

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Hauptverfasser:	REHM, RICHARD., X 7022 LEIPZIG, ZIMMERMANN, GERHARD, DR., X 4203 BAD DUERRENBERG, GUENSCHEL, HUBERT., X 7010 LEIPZIG, BORDES, ERNST., X 1330 SCHWEDT, NOWAK, SIEGFRIED, DR., X 7030 LEIPZIG, PECHSTEIN, GUENTER., X 7113 MARKKLEEBERG
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY CRACKING HYDROCARBON OILS FUELS LUBRICANTS METALLURGY MINERAL WAXES PEAT PETROLEUM, GAS OR COKE INDUSTRIES PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Beschreibung
Zusammenfassung:	In prodn. of lower olefine and aromatic-rich fractions in the petrol and kerosene boiling range, hydrocarbon fractions boiling at =450 degrees C (pref. straight-run petroleum fractions) are pyrolysed under pressure in presence of steam and methane or methane-rich gas. Cracking is pref. carried out under 10-50 (25-40) atmos. at 700-1000 degrees C with dwell times 0.8 secs. Ratio of steam to methane is 6-0.5:1 (2.5-1.8:1). Formation of methane during pyrolysis is suppressed, and gum or coke formation in the reactor and cracked gas coolers is reduced to around 1/3 by addition of methane. Field of liquid products in the required boiling range is increased.