Lummus Technology Inc.

Thomas Alexander Dwyer

Robert John Brummer

Kevin John Schwint

A butadiene extraction processes designed for flexible operations, with or without a compressor, is disclosed. The ability to run at both high and low pressures provides added process flexibility.

Flexible butadiene extraction process

A process for recovering butadiene from a Cfraction is disclosed. The process may include: contacting a mixed Cstream comprising butane, butene, and butadiene, with a solvent comprising an organic solvent and water in a butadiene pre-absorber column to recover an overheads fraction comprising at least a portion of the butane, butene, and water, and a first bottoms fraction comprising the organic solvent, butadiene, and at least a portion of the butene; and feeding the first bottoms fraction to a butadiene extraction unit to recover a butene fraction, a crude butadiene fraction, and a solvent fraction.

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Bloomfield, NJ, United States of America

Thomas Alexander Dwyer