| abstract |
A process for recovering butadiene from a C 4 fraction is disclosed. The process may comprise: contacting a mixed C 4 stream comprising butane, butene and butadiene with a solvent comprising an organic solvent and water in a butadiene pre-adsorber column to produce at least a portion of the butane, And an overhead fraction comprising water and a first bottom fraction comprising said organic solvent, butadiene, and at least a portion of said butene; And recovering the butene fraction, the crude butadiene fraction, and the solvent fraction by feeding the first bottom fraction to the butadiene extraction unit. |