E.i. Dupont De Nemours and Company

Tate & Lyle Ingredients Americas LLC

A E Staley Manufacturing Company

Robert E Trotter

F Glenn Gallagher

Mayis Seapan

Tyler T Ames

Daniel Albert Green

John Harvey Eng

Gary J Wilson

Gene Parrish

Emily A Blum

Albert W Alsop

William F Lehnhardt

James M Gaddy

George Francis Diffendall

Carl J Giardino

Luis Alberto Chu

Eugene K Yu

Gregory M Wenndt

Michael L Luyben

Jefferson C Lievense

Patrick Fitzgibbon

Bryan C Dravis

Robert E Michel

Peter Gideon Gelblum

Richard Redfearn Hepner

Dennis M Adkesson

James S Disney

James M Disney

Hashim M Badat

Dennis N Adkesson

Dennis Michael Adkesson

A process for purifying 1,3-propanediol from the fermentation broth of a culturedthat has been bioengineered to synthesize 1,3-propanediol from sugar is provided. The basic process entails filtration, ion exchange and distillation of the fermentation broth product stream, preferably including chemical reduction of the product during the distillation procedure. Also provided are highly purified compositions of 1,3-propanediol.

Purification of biologically-produced 1,3-propanediol

This invention relates to a continuous process for production of poly(trimethylene terephthalate), wherein gaseous 1,3-propanediol by product resulting from the process is condensed in a condenser, and a portion of the condensed by-product is recycled back into the process.

Continuous process for producing poly(trimethylene terephthalate)

This invention relates to a continuous process for production of poly(trimethylene terephthalate), wherein gaseous 1,3-propanediol by-product resulting from the process is condensed in a condenser, the total amount of any trimethylene terephthalate cyclic dimer and poly(trimethylene terephthalate) in the condensed by-product 1,3-propanediol is adjusted, and a portion of the condensed by-product is recycled to the condenser while another portion is recycled back into the process.

Continuous manufacture of poly(trimethylene terephthalate)

This invention relates to a continuous process for production of poly(trimethylene terephthalate), wherein gaseous 1,3-propanediol by product resulting from the process is condensed in a condenser, and a portion of the condensed by-product is recycled to the condenser while anther portion is recycled back into the process.

Poly(trimethylene therephthalate) continuous manufacturing process

The invention discloses a hydrogenation process for removing impurities and controlling acid for use in downstream processing of biochemically-derived 1,3-propanediol. Preferably, the biochemically-derived 1,3-propanediol, before the contacting, has an initial color and, after the contracting, has a color that is lower than the initial color.

Purification of biochemically derived 1,3-propanediol

Hydrogenation of biochemical derived 1,3 -propanediol

Separation of ethylene glycol and diethylene glycol from dimethyl terephthalate is accomplished by distillation using methyl benzoate or the methyl ester of p-toluic acid as an azeotropic agent.

Process for the separation of glycols from dimethyl terephthalate

A distillation process for the preparation of purified concentrated BDO. High boiling impurities, including color formers, precursors of color formers and tar formers are removed from the BDO early in the process and under mild conditions.

Preparation of purified concentrated BDO

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Wilmington, DE, United States of America

Robert E Trotter