Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – Diolefin product
Patent
1984-03-09
1985-03-12
Gantz, Delbert E.
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
Diolefin product
585616, 585617, C07C 509, C07C 5333
Patent
active
045046921
ABSTRACT:
A process for producing 1,3-butadiene which comprises feeding a fraction comprising C.sub.4 -paraffins and C.sub.4 -olefins as the main components and being free from isobutene, 1,3-butadiene and C.sub.4 -acetylenes to a dehydrogenation or oxidative dehydrogenation step (step A), where the n-butenes contained therein is converted to 1,3-butadiene; feeding the 1,3-butadiene-containing hydrocarbon fraction thus obtained (fraction C) to an extractive distillation column (column B), in which said fraction C is distilled in an atmosphere of a selective solvent while obtaining a fraction comprising C.sub.4 -paraffins as the main hydrocarbon component from the top of the column; withdrawing a fraction comprising n-butenes as the main component as a side stream from a stage on the upper side of the aforementioned fraction C-feeding stage and on the lower side of the selective solvent-feeding stage and recycling it into step A while withdrawing a fraction comprising 1,3-butadiene as the main hydrocarbon component and also containing the selective solvent from the bottom of column B; and separating 1,3-butadiene from the 1,3-butadiene-containing fraction.
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Encyclopedia of Chem. Proc. and Design, vol. 5, pp. 144-154.
Chemical Engineering 39, pp. 146-148.
Arakawa Masatoshi
Nakazawa Kazuyoshi
Yoshioka Hayao
Gantz Delbert E.
Japan Synthetic Rubber Co. Ltd.
Myers Helane Maull
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