Butamax Advanced Biofuels LLC

Butamax (tm) Advanced Biofuels LLC

The Chemours Company Fc, LLC

William David Parten

Joseph J Zaher

Michael Charles Grady

Yihui Tom Xu

Bruce M Vrana

Robert W Sylvester

Steven Lamar Grise

Gary Robert Maxwell

Randall O Dixon

Monique Bowford

Gary R Maxwell

Process for making purified hydrogen cyanide. The process includes feeding a reaction product including HCN, water, and organonitriles to a separation vessel; taking a liquid slip stream of HCN, water and organonitriles from the separation vessel; and feeding the liquid slipstream into a sidestream stripper to purge nitriles from the HCN reaction product.

Method for removing nitriles from hydrogen cyanide

A process for recovering butanol from a mixture of a water-immiscible organic extractant, water, butanol, and optionally a noncondensable gas, is provided. The butanol is selected from 1-butanol, isobutanol, and mixtures thereof An overhead stream from a first distillation column is decanted into two liquid phases. The wet butanol phase is returned to the first distillation column as reflux. A bottom stream from the first distillation column is refined in a second distillation column to obtain a second overhead stream and a second bottoms stream. The extractant may be Cto Cfatty alcohols, Cto Cfatty acids, esters of Cto Cfatty acids, Cto Cfatty aldehydes, and mixtures thereof.

Recovery of butanol isomers from a mixture of butanol isomers, water, and an organic extractant

A process for recovering butanol from a mixture of a water-immiscible organic extractant, water, butanol, and optionally a non-condensable gas, is provided. The butanol is selected from 1-butanol, isobutanol, and mixtures thereof. An overhead stream from a first distillation column is decanted into two liquid phases. The wet butanol phase is refined in a second distillation column; the aqueous phase is returned to the first distillation column. A portion of the wet butanol phase from the decanter is also returned to the first distillation column. The extractant may be Cto Cfatty alcohols, Cto Cfatty acids, esters of Cto Cfatty acids, Cto Cfatty aldehydes, and mixtures thereof.

A fermentation liquid feed including water and a product alcohol and optionally COis at least partially vaporized such that a vapor stream is produced. The vapor stream is contacted with an absorption liquid under suitable conditions wherein an amount of the product alcohol is absorbed. The portion of the vapor stream that is absorbed can include an amount of each of the water, the product alcohol and optionally the CO. The temperature at the onset of the absorption of the vapor stream into the absorption liquid can be greater than the temperature at the onset of condensation of the vapor stream in the absence of the absorption liquid. The product alcohol can be separated from the absorption liquid whereby the absorption liquid is regenerated. The absorption liquid can include a water soluble organic molecule such as an amine.

Process to remove product alcohol from a fermentation by vaporization under vacuum

A process for recovering butanol from a mixture comprising a water-immiscible organic extractant, water, butanol, and optionally a non-condensable gas, is provided. The butanol is selected from 1-butanol, 2-butanol, isobutanol, and mixtures thereof. An overhead stream from a first distillation column is condensed to recover a mixed condensate. An entrainer is added to at least one appropriate process stream or vessel such that the mixed condensate comprises sufficient entrainer to provide phase separation of the organic and the aqueous phases to provide for recovery of the butanol.

Recovery of butanol from a mixture of butanol, water, and an organic extractant

A process for recovering butanol from a mixture comprising a water-immiscible organic extractant, water, butanol, and optionally a non-condensable gas, is provided. The butanol is selected from 1-butanol, 2-butanol, isobutanol, and mixtures thereof. The extractant comprises at least one solvent selected from the group consisting of Cto Cfatty alcohols, Cto Cfatty acids, esters of Cto Cfatty acids, Cto Cfatty aldehydes, and mixtures thereof.

The present invention relates to a two stage process to control the butanol concentration from fermentation broth.

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Wilmington, DE, United States of America

William David Parten