Method for obtaining crude 1,3-butadiene from a C 4 fraction

Details Method for obtaining crude 1,3-butadiene from a C 4 fraction Method for obtaining crude 1,3-butadiene from a C 4 fraction

2004-05-19

2009-11-17

Manoharan, Virginia (Department: 1797)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

Diolefin product

C203S001000, C203S023000, C203S043000, C203S058000, C203S078000, C203S099000, C203SDIG019, C585S809000, C585S810000, C585S834000, C585S865000

Reexamination Certificate

active

07619126

ABSTRACT:
A process for recovering crude 1,3-butadiene from a C4fraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column to form a first subregion (A), a second subregion (B) and a lower common column region (C) and which is preceded by an extractive scrubbing column (K), wherein the operation of the dividing wall column (TK) is set by regulation of the energy input into the dividing wall column (TK) via a bottom vaporizer (V) and setting of the number of the theoretical plates in the lower common column region (C) so that a bottom stream (17) consisting of purified solvent is obtained from the dividing wall column (TK), is proposed.

REFERENCES:
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patent: 4162198 (1979-07-01), Stockburger et al.
patent: 6846966 (2005-01-01), Lumgair et al.
patent: 7132038 (2006-11-01), Bohner et al.
patent: 27 24 365 (1978-11-01), None
patent: 101 02 168 (2002-06-01), None
patent: 101 05 660 (2002-08-01), None

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