Chemistry of hydrocarbon compounds – Aromatic compound synthesis – From nonhydrocarbon feed
Patent
1990-03-07
1991-10-22
Konopka, Paul E.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
From nonhydrocarbon feed
502 34, 502 56, 585408, 585639, 585640, 585733, C07C 120, C07C 100, B01J 2938, B01J 3804
Patent
active
050597388
ABSTRACT:
It is disclosed that in a fixed bed process for the conversion of C.sub.1 -C.sub.4 oxygenates in contact with acidic, medium pore, shape selective metallosilicate catalyst particles to produce gasoline boiling range hydrocarbons, including the step of reactivating spent catalyst at elevated temperature, the cycle time between regenerations can be substantially improved by reactivating the spent catalyst at reduced pressure and elevated temperature in contact with a stream of inert purge gas. Preferably, the reactivation is carried out at a reduced pressure from sub-atmospheric to 1400 kPa using nitrogen as a purge gas. Other purge gases include light paraffinic hydrocarbons, refinery fuel gas and Group VIII gases of the Periodic Table of the Elements.
REFERENCES:
patent: 3398208 (1965-03-01), Ward
patent: 4417088 (1983-11-01), Miller
patent: 4544781 (1985-10-01), Chao et al.
Beech, Jr. James H.
Ragonese Francis P.
Konopka Paul E.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Wise L. G.
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