E.i. Dupont De Nemours and Company

Other

Tate & Lyle Ingredients Americas LLC

A E Staley Manufacturing Company

Luis Alberto Chu

Albert W Alsop

F Glenn Gallagher

Mayis Seapan

William F Lehnhardt

Tyler T Ames

Robert E Trotter

James M Gaddy

Jefferson C Lievense

Michael L Luyben

Patrick Fitzgibbon

Gregory M Wenndt

Eugene K Yu

Zeru Berhane Tekie

Bryan C Dravis

Benny E Blackwell

Eugene F Hartstein

Steven Lamar Grise

Wayne B Ely

James M Disney

Monroe Davis

Dennis N Adkesson

Robert Joseph Flowers

Dennis M Adkesson

James S Disney

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

A process for treating acid gas comprising hydrogen sulfide comprises introducing a first acid gas into a reducing furnace to produce a first oxidized gas stream, cooling the first oxidized gas stream in a first heat recovery system, introducing the cooled gas stream into an oxidizing furnace to produce a second oxidized gas stream and cooling the second oxidized gas stream in a second heat recovery system. The acid gas is preferably produced in a refinery after treatment of sour gas or sour water. Spent acid may be fed into oxidizing furnace as part of a sulfuric acid recovery process. The spent acid can be spent sulfuric acid from a sulfuric acid alkylation process.

Process for treating acid gas in staged furnaces with inter-stage heat recovery

The present invention provides a process for removing ammonia as an aqueous salt solution from an acid gas comprising ammonia and hydrogen sulfide. A strong acid, such as sulfuric acid, is used as a scrubbing agent to convert ammonia to an ammonium salt. Control of pH and stripping in combination with reboiler or evaporators reduces hydrogen sulfide concentration. The ammonium salt is produced as an aqueous solution, which may crystallized to form a solid product. The ammonium salt solution or solid may be used as a fertilizer.

Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide

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Landenberg, PA, United States of America

Luis Alberto Chu