Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – To produce unsaturate
Patent
1999-03-25
2000-12-26
Johnson, Jerry D.
Chemistry of hydrocarbon compounds
Plural serial diverse syntheses
To produce unsaturate
585312, 585644, 585646, 585647, C07C 100, C07C 600
Patent
active
061662798
ABSTRACT:
The preparation of olefins from steam cracker or refinery C.sub.4 streams is carried out by selective hydrogenation of butadienes and acetylenic impurities in the steam cracker or refinery C.sub.4 stream, with simultaneous or subsequent, at least partial isomerization of 1-butene to 2-butene, followed by removal of i-butene from the C.sub.4 stream by reaction with an alcohol to form an ether, followed by removal of oxygen-containing impurities from the C.sub.4 stream using adsorber materials, followed by two-stage metathesis of the butenes in the C.sub.4 stream by conversion of 1-butene and 2-butene present in the C.sub.4 stream into propene and 2-pentene and subsequent reaction of the 2-pentene with ethene in the presence of a metathesis catalyst to form propene and 1-butene. Optionally, butadiene may be removed from the C.sub.4 stream by extractive distillation in a preliminary step.
REFERENCES:
patent: 3660506 (1972-05-01), Banks
patent: 5300718 (1994-04-01), McCaulley
patent: 5698760 (1997-12-01), Kelly
patent: 5898091 (1999-04-01), Chodorge et al.
Breitscheidel Boris
Meyer Gerald
Schulz Michael
Schulz Ralf
Schwab Peter
BASF - Aktiengesellschaft
Dang Thuan D.
Johnson Jerry D.
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