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Timestamp: 2013-05-23 00:30:01
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Matched Legal Cases: ['application No. 09', 'Application No. 60', 'Application No. 08164159', 'Application No. 08164159', 'Application No. 07008768', 'Application No. 00917888', 'Application No. 07008768', 'Application No. 514253', 'Application No. 514253', 'Application No. 2004200701', 'Application No. 38794', 'Application No. 38794', 'Application No. 2004200701', 'Application No. 2004200701', 'Application No. 38794', 'Application No. 00804895', 'Application No. 2000', 'Application No. 0816459', 'Application No. 00804895', 'Application No. 00804895', 'Application No. 00917888', 'Application No. 00917888']

Patente US7964379 - Process for producing ethanol - Google PatentesB�squeda Im�genes Maps Play YouTube Noticias Gmail Drive M�s » B�squeda avanzada de patentes | Historial web | Iniciar sesi�n B�squeda avanzada de patentesPatentesA process for producing ethanol including a combination of biochemical and synthetic conversions results in high yield ethanol production with concurrent production of high value coproducts. An acetic acid intermediate is produced from carbohydrates, such as corn, using enzymatic milling and fermentation...http://www.google.es/patents/US7964379?utm_source=gb-gplus-sharePatente US7964379 - Process for producing ethanol N�mero de publicaci�nUS7964379 B2Tipo de publicaci�nConcesi�n N�mero de solicitud12/693,533 Fecha de publicaci�n21 Jun 2011 Fecha de presentaci�n26 Ene 2010 Fecha de prioridad11 Mar 1999Tambi�n publicado comoUS20100273229US20110275127 InventoresTimothy J. EggemanDan Verser Cesionario originalZeachem, Inc.Venture Lending & Leasing Vi, Inc.Venture Lending & Leasing V, Inc. Clasificaci�n de EE.UU.435/161435/135435/140562/608562/600435/163435/162435/252.7562/606 Clasificaci�n internacionalC12P7/06C12P7/14C12P7/08 Clasificaci�n cooperativaY02E50/17C07C29/149C12P7/14Y02E50/16C12P7/54C12P7/06C07C67/08C12P7/56 Clasificaci�n europeaC12P 7/06C12P 7/14C12P 7/54C12P 7/56C07C 29/149C07C 67/08ReferenciasCitas de patentes (102)Otras citas (81)Enlaces externosUSPTO Cesi�n de USPTO EspacenetProcess for producing ethanolUS 7964379 B2 Resumen A process for producing ethanol including a combination of biochemical and synthetic conversions results in high yield ethanol production with concurrent production of high value coproducts. An acetic acid intermediate is produced from carbohydrates, such as corn, using enzymatic milling and fermentation steps, followed by conversion of the acetic acid into ethanol using esterification and hydrogenation reactions. Coproducts can include corn oil, and high protein animal feed containing the biomass produced in the fermentation.
CROSS REFERENCE TO RELATED APPLICATIONS The present application is a continuation of U.S. patent application Ser. No. 12/051,668, filed Mar. 19, 2008, which is a continuation of U.S. patent application Ser. No. 11/172,376, filed Jun. 29, 2005, now U.S. Pat. No. 7,351,559, which is a division of U.S. patent application Ser. No. 10/310,552, filed Dec. 4, 2002, now U.S. Pat. No. 6,927,048, which is a continuation of U.S. patent application No. 09/720,930, filed Dec. 29, 2000, now U.S. Pat. No. 6,509,180, which is a national stage application of International Application No. PCT/US00/06498, filed Mar. 10, 2000, and which also claims priority to U.S. Provisional Application No. 60/124,276, filed Mar. 11, 1999, each of which is incorporated herein by reference in its entirety.
Glucoamylase is preferably used to complete the hydrolysis of the starch molecule. Glucoamylase is an exoenzyme since it only attacks the ends of the starch molecule. The enzyme hydrolyzes both 1,4 and 1,6 linkages, so nearly complete hydrolysis of the starch can be achieved. Optimal conditions for glucoamylase are typically 58-62 C, pH 4.4-5.0, and 24-48 hours of residence time. Longer residence times are typically not beneficial since the enzyme also catalyzes the formation of non-fermentable disaccharides�processes called reversion and retrogradation.
Since esterification is an equilibrium reaction, high conversion can be obtained by driving the reaction to the right with continuous removal of one or more products. Reactive distillation similar to that developed by Chronopol for lactide synthesis (See U.S. Pat. No. 5,750,732, which is incorporated herein by reference in its entirety) and by Eastman Chemical for methyl-acetate production (see U.S. Pat. Nos. 4,939,294 and 4,435,595 and Agreda, V. H., Partin, L. R., Heise, W. H., �High-Purity Methyl Acetate Via Reactive Distillation�, Chemical Engineering Progress, p. 40-46, February 1990, which are incorporated herein by reference in their entirety) is an economically attractive method. U.S. Pat. No. 5,599,976, which is incorporated herein by reference in its entirety, discloses the conversion of very dilute acetic acid to the ester in a continuous reactive distillation process. Xu and Chaung (Xu, Z. P, Chuang, K. T., �Kinetics of Acetic Acid Esterification over Ion Exchange Catalysts�, Can. J. Chem. Eng., pp. 493-500, Vol. 74, 1996) show that reactive distillation to produce the ester of acetic acid from dilute solution is the preferred method to remove acetic acid from very dilute solutions, as are produced in the current invention. In this concept, the acetic acid flows in a counter current fashion to the esterifying ethanol in a distillation column. In the current invention, ethyl acetate is more volatile than acetic acid so the ethyl acetate is distilled away from the liquid mixture and the esterification reaction is pushed to the right, thus enabling high conversions in a single vessel. The process proposed here goes beyond these examples in that its combines simultaneous acidification with the reactive distillation esterification. All of the cited processes start with acetic acid (or lactic acid in the Chronopol case) and not a salt.
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