Patents by Inventor Melchior A. Meilchen
Melchior A. Meilchen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8975437Abstract: A continuous process is provided for selective formation of a vinyl ester by reactive distillation from a corresponding carboxylic acid. Carboxylic acid, vinyl acetate, and a palladium acetate—bidentate ligand catalyst complex are provided and reacted in a typical embodiment. Acetic acid and vinyl acetate are continuously removed from the reaction mixture and vinyl acetate is recycled to the reaction mixture. The vinyl ester product is separated from the vinyl acetate, residual carboxylic acid, residual acetic acid, and catalyst.Type: GrantFiled: May 3, 2011Date of Patent: March 10, 2015Assignee: Celanese International CorporationInventors: Ilias S. Kotsianis, Barbara F. M. Kimmich, Melchior A. Meilchen, Hang Wang, Prashant P. Barve, Bhaskar D. Kulkarni, Gopal M. Chaphekar, Ravindra W. Shinde, Milind Y. Gupte, Sanjay P. Kamble, Satish N. Shintre
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Patent number: 8921593Abstract: A semi-continuous process is provided for selective formation of a vinyl ester by reactive distillation from a corresponding carboxylic acid. Carboxylic acid, vinyl acetate, and a palladium acetate—bidentate ligand catalyst complex are provided and reacted in a typical embodiment. Acetic acid and vinyl acetate are continuously removed from the reaction mixture and vinyl acetate is recycled to the reaction mixture. The vinyl ester product is separated from the vinyl acetate, residual carboxylic acid, residual acetic acid, and catalyst.Type: GrantFiled: May 3, 2011Date of Patent: December 30, 2014Assignee: Celanese International CorporationInventors: Ilias S. Kotsianis, Barbara F. M. Kimmich, Melchior A. Meilchen, Hang Wang, Prashant P. Barve, Bhaskar D. Kulkarni, Gopal M. Chaphekar, Ravindra W. Shinde, Milind Y. Gupte, Sanjay P. Kamble, Satish N. Shintre
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Patent number: 8168824Abstract: There is shown a method of purifying glacial acetic acid containing terpene and terpenoid impurities. Substantially dry acetic acid containing terpene and terpenoid impurities is combined with water and a suitable organic solvent, which is substantially immiscible with acetic acid and water, to form a separating composite extraction medium having a weight ratio of acetic acid:water of at least 1:1. The components are separated into an organic phase and an aqueous acid phase, with the terpene and terpenoid impurities concentrated in the organic phase, and with the aqueous acid phase purified of terpene and terpenoid impurities. The purified aqueous acid phase is recovered, and the purified acetic acid is dried.Type: GrantFiled: August 11, 2010Date of Patent: May 1, 2012Assignee: Celanese International CorporationInventors: R. Jay Warner, Melchior A. Meilchen
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Publication number: 20110275853Abstract: A continuous process is provided for selective formation of a vinyl ester by reactive distillation from a corresponding carboxylic acid. Carboxylic acid, vinyl acetate, and a palladium acetate—bidentate ligand catalyst complex are provided and reacted in a typical embodiment. Acetic acid and vinyl acetate are continuously removed from the reaction mixture and vinyl acetate is recycled to the reaction mixture. The vinyl ester product is separated from the vinyl acetate, residual carboxylic acid, residual acetic acid, and catalyst.Type: ApplicationFiled: May 3, 2011Publication date: November 10, 2011Inventors: Ilias S. Kotsianis, Barbara F.M. Kimmich, Melchior A. Meilchen, Hang Wang, Prashant P. Barve, Bhaskar D. Kulkarni, Gopal M. Chaphekar, Ravindra W. Shinde, Milind Y. Gupte, Sanjay P. Kamble, Satish N. Shintre
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Publication number: 20110275852Abstract: A semi-continuous process is provided for selective formation of a vinyl ester by reactive distillation from a corresponding carboxylic acid. Carboxylic acid, vinyl acetate, and a palladium acetate—bidentate ligand catalyst complex are provided and reacted in a typical embodiment. Acetic acid and vinyl acetate are continuously removed from the reaction mixture and vinyl acetate is recycled to the reaction mixture. The vinyl ester product is separated from the vinyl acetate, residual carboxylic acid, residual acetic acid, and catalyst.Type: ApplicationFiled: May 3, 2011Publication date: November 10, 2011Inventors: Ilias S. Kotsianis, Barbara F.M. Kimmich, Melchior A. Meilchen, Hang Wang, Prashant P. Barve, Bhaskar D. Kulkarni, Gopal M. Chaphekar, Ravindra W. Shinde, Milind Y. Gupte, Sanjay P. Kamble, Satish N. Shintre
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Publication number: 20100305360Abstract: There is shown a method of purifying glacial acetic acid containing terpene and terpenoid impurities. Substantially dry acetic acid containing terpene and terpenoid impurities is combined with water and a suitable organic solvent, which is substantially immiscible with acetic acid and water, to form a separating composite extraction medium having a weight ratio of acetic acid:water of at least 1:1. The components are separated into an organic phase and an aqueous acid phase, with the terpene and terpenoid impurities concentrated in the organic phase, and with the aqueous acid phase purified of terpene and terpenoid impurities. The purified aqueous acid phase is recovered, and the purified acetic acid is dried.Type: ApplicationFiled: August 11, 2010Publication date: December 2, 2010Inventors: R. Jay Warner, Melchior A. Meilchen
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Patent number: 7790922Abstract: There is shown a method of purifying glacial acetic acid containing terpene and terpenoid impurities. Substantially dry acetic acid containing terpene and terpenoid impurities is combined with water and a suitable organic solvent, which is substantially immiscible with acetic acid and water, to form a separating composite extraction medium having a weight ratio of acetic acid:water of at least 1:1. The components are separated into an organic phase and an aqueous acid phase, with the terpene and terpenoid impurities concentrated in the organic phase, and with the aqueous acid phase purified of terpene and terpenoid impurities. The purified aqueous acid phase is recovered, and the purified acetic acid is dried.Type: GrantFiled: March 14, 2008Date of Patent: September 7, 2010Assignee: Celanese International CorporationInventors: R. Jay Warner, Melchior A. Meilchen
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Patent number: 7612232Abstract: A method of purifying acetic acid containing terpene and terpenoid impurities, includes: (a) supplying acetic acid containing terpene or terpenoid impurities and water to a distillation column; (b) azeotropically removing terpene or terpenoid impurities from the mixture of acetic acid and water supplied to the column as distillate; and (c) withdrawing a product stream from the column comprising acetic acid purified of terpene or terpenoid impurities. The method is particularly effective for purifying acetic acid recovered from a wood purification process.Type: GrantFiled: March 27, 2008Date of Patent: November 3, 2009Assignee: Celanese International CorporationInventors: R. Jay Warner, Melchior A. Meilchen, Michael O. Streb, Nathan K. Powell, Rolf Soellner
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Publication number: 20090247788Abstract: A method of purifying acetic acid containing terpene and terpenoid impurities, includes: (a) supplying acetic acid containing terpene or terpenoid impurities and water to a distillation column; (b) azeotropically removing terpene or terpenoid impurities from the mixture of acetic acid and water supplied to the column as distillate; and (c) withdrawing a product stream from the column comprising acetic acid purified of terpene or terpenoid impurities. The method is particularly effective for purifying acetic acid recovered from a wood purification process.Type: ApplicationFiled: March 27, 2008Publication date: October 1, 2009Inventors: R. Jay Warner, Melchior A. Meilchen, Michael O. Streb, Nathan K. Powell, Rolf Soellner
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Publication number: 20090234157Abstract: There is shown a method of purifying glacial acetic acid containing terpene and terpenoid impurities. Substantially dry acetic acid containing terpene and terpenoid impurities is combined with water and a suitable organic solvent, which is substantially immiscible with acetic acid and water, to form a separating composite extraction medium having a weight ratio of acetic acid:water of at least 1:1. The components are separated into an organic phase and an aqueous acid phase, with the terpene and terpenoid impurities concentrated in the organic phase, and with the aqueous acid phase purified of terpene and terpenoid impurities. The purified aqueous acid phase is recovered, and the purified acetic acid is dried.Type: ApplicationFiled: March 14, 2008Publication date: September 17, 2009Inventors: R. Jay Warner, Melchior A. Meilchen
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Publication number: 20080132723Abstract: The present invention provides an integrated, optimized process for the production of ethylene, carbon monoxide and acetic acid from an ethane feed, including reacting ethane with oxygen in the presence of a catalyst to produce ethylene, carbon monoxide and acetic acid in a reactor, wherein the catalyst comprises the elements Mo, Pd, X, and Y in the gram-atomic ratios MOa Pdb Xc Yd, and the oxygen partial pressure in the reactor is about 15 psia to about 50 psia. The partial pressure of ethane in the reactor is about 50 psia to about 150 psia.Type: ApplicationFiled: December 4, 2006Publication date: June 5, 2008Inventors: Victor J. Johnston, Joseph G. Duff, Debra Ann Ryan, Deborah R. Repman, Melchior A. Meilchen, David W. Townsend, Cathy L. Tway
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Patent number: 6339171Abstract: Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde and its derivatives, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional post extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower.Type: GrantFiled: May 3, 1999Date of Patent: January 15, 2002Assignee: Celanese International CorporationInventors: Madan Singh, George A. Blay, Michael L. Karnilaw, Melchior A. Meilchen, Robin Suzanne Tanke, G. Paull Torrence
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Patent number: 6228226Abstract: A process for working up crude, liquid vinyl acetate feed containing acetic acid, water and ethyl acetate and optionally smaller amounts of other impurities by distillation, wherein there is introduced into the distillation column, above the feed point of the crude, liquid vinyl acetate, 0.1 to 5% by weight of water, based on the crude, liquid vinyl acetate feed, and 0.1 to 60% by weight of acetic acid, based on the crude, liquid vinyl acetate feed.Type: GrantFiled: May 21, 1999Date of Patent: May 8, 2001Assignee: Celanese GmbHInventors: Stefan Hess, Michael Mark, Melchior A. Meilchen, Johann Stamm, Thomas Vernaleken, Martin Wagner
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Patent number: 6143930Abstract: Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower.Type: GrantFiled: October 17, 1997Date of Patent: November 7, 2000Assignee: Celanese International CorpInventors: Madan Singh, George A. Blay, Michael L. Karnilaw, Melchior A. Meilchen, Wayne David Picard, Valerie Santillan, Mark O. Scates, Robin Suzanne Tanke, G. Paull Torrence, Richard F. Vogel, Jr., R. Jay Warner