METHOD OF PRODUCTION OF UNSATURATED HYDROCARBONS

FIELD: thermal pyrolysis of hydrocarbon raw material; chemical and petrochemical industries; production of lower olefins in tubular furnaces. ^ SUBSTANCE: proposed method consists in preliminary thermal pyrolysis of directly-distilled gasoline fraction in tubular furnace at temperature of 825-835°C...

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Bibliographische Detailangaben
Hauptverfasser:	MASKAEV G.P, EROFEEV V.I, KUZNETSOV N.N, KOVAL' L.M, ERMIZIN K.V, GORNOSTAEV V.V
Format:	Patent
Sprache:	eng ; rus
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:	FIELD: thermal pyrolysis of hydrocarbon raw material; chemical and petrochemical industries; production of lower olefins in tubular furnaces. ^ SUBSTANCE: proposed method consists in preliminary thermal pyrolysis of directly-distilled gasoline fraction in tubular furnace at temperature of 825-835°C continued for 24-320 h, contact time of 0.4-0.5 s and ratio of water steam=1.0:0.4-0.5 followed by thermal pyrolysis of light hydrocarbon raw materials, for example alkanes C2-C4 in the same coils of tubular furnace at temperature 835-845°C, contact time of 0.4-0.5 and mass ratio of water steam= 1.0:0.3-0.4. Proposed method makes it possible to increase inter-regeneration time of furnace, thus increasing yield of ethylene and propylene due to deposition of amorphous isotropic coke on inner walls of coils. ^ EFFECT: enhanced efficiency. ^ 2 cl, 1 tbl, 7 ex