Gevo, Inc.

Dow Corning Corporation

Verdezyne, Inc.

Chronopol, Inc.

Biopak Technology, Ltd.

William Andrew Evanko

Patrick R Gruber

Aristos Aristidou

Andrew Hawkins

David A Glassner

Aharon Eyal

Kent Evans

Fudu Miao

Peter Meinhold

Matthew W Peters

Dan W Verser

Edward S Lipinsky

Timothy J Eggeman

George E Cremeans

James Wade

Kevin H Schilling

Alex Cheung

Thomas Buelter

Melville E Hillman

Manfred Meiser

Marco Landwehr

Anthony E Allen

Kirk Andrew Cronin

Jun Urano

Uvini Gunawardena

Jose Miguel Laplaza

Reid M Renny Feldman

Jason H Radany

Alireza Malekadeli

Robert Dennis Crow

A process for purifying a polycarboxylic acid from a mixture is provided. Optionally, the mixture is an aqueous solution and optionally the process comprises an acidification step and/or the use of one or more organic solvents. Also provided in part are compositions of polycarboxylic acids.

Purification of polycarboxylic acids

Methods for producing a biofuel are provided. Also provided are biocatalysts that convert a feedstock to a biofuel.

Methods for the economical production of biofuel from biomass

This invention is directed to methods for recovery of C3-C6 alcohols from dilute aqueous solutions, such as fermentation broths. Such methods provide improved volumetric productivity for the fermentation and allows recovery of the alcohol. Such methods also allow for reduced energy use in the production and drying of spent fermentation broth due to increased effective concentration of the alcohol product by the simultaneous fermentation and recovery process which increases the quantity of alcohol produced and recovered per quantity of fermentation broth dried. Thus, the invention allows for production and recovery of C3-C6 alcohols at low capital and reduced operating costs.

Recovery of higher alcohols from dilute aqueous solutions

A process is described by which numerous waste or by-product aqueous hydrochloric acid streams can be purified by contacting the aqueous hydrochloric acid with activated carbon to remove silicon containing impurities and thereby allowing the hydrochloric acid to be re-used for various applications.

Purification of hydrochloric acid

Disclosed is a novel integrated process for production of cyclic esters which includes recovery of starting materials, such as lactic acid from a dilute aqueous lactic acid-containing solution, by solvent extraction. The starting materials are then formed into cyclic esters by removal of water wherein the concentration of higher molecular weight oligomers is maintained below about 20 wt % of the reaction composition. The process further includes providing a recovery solvent for the reaction composition and separating the cyclic esters from the starting materials and higher molecular weight oligomers by liquid-liquid equilibrium separation. The present invention is further directed toward independent novel unit operations of the overall process. The present invention provides for the efficient production and recovery of cyclic esters due to integration of the various unit operations by use of appropriate solvents and recycle streams. In addition, high rates of conversion of starting materials and high rates of selective production of cyclic esters are achieved by appropriate control of process parameters.

Method to produce cyclic esters

A process is described by which numerous waste or by-product aqueous hydrochloric acid streams can be purified by contacting the aqueous hydrochloric acid with a polystyrenic based resin to remove silicon containing impurities and thereby allowing the hydrochloric acid to be re-used for various applications.

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Golden, CO, United States of America

William Andrew Evanko