PURPOSE: To produce an oxidation-resistant arom. solvent having a high b.p. by removing arom. hydrocarbons from a hydrogenation product of a thermal cracking gasoline produced as a by-product in the thermal cracking of petroleum hydrocarbons, separating a fraction having a specified boiling range from the residual oil obtained in the foregoing step, dehydrogenating the fraction, and then reacting it with benzene in the presence of an acidic alkylation catalyst.
CONSTITUTION: A thermal cracking gasoline having a b.p. of 45-198°C, which is a by-product in the production of ethylene, propylene, etc., by the thermal cracking of petroleum hydrocarbons (e.g. naphtha) at 700°C or higher, is hydrogenated at 250-450°C under 20-60kg/cm2 in the presence of a suitable catalyst (e.g. Co-Mo). From the resulting product are removed arom. hydrocarbons using a selective solvent (e.g. N-methylpyrrolidone) and a fraction having a b.p. of 49.5-65.0°C) is obtd. The fraction is dehydrogenated at 400°C or higher in the presence of water vapor or hydrogen using a dehydrogenation catalyst to give a dehydrogenated oil having a bromine number of 2-60g/100g, which is then reacted with benzene in the presence of an acidic alkylation catalyst.
IWAMOTO KOICHI
TOKUMOTO YUICHI
INOMATA YOSHIHISA
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