Patents by Inventor Mesfin Ejerssa Janka
Mesfin Ejerssa Janka 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: 9676740Abstract: Disclosed is a process to produce a dry purified carboxylic acid product comprising furan-2,5-dicarboxylic acid (FDCA). The process comprises oxidizing at least one oxidizable compound selected from the following group: 5-(hydroxymethyl)furfural (5-HMF), 5-HMF esters (5-R(CO)OCH2-furfural where R is alkyl, cycloalkyl, or aryl), 5-HMF ethers (5-R?OCH2-furfural where R? is alkyl, cycloalkyl, or aryl), 5-alkyl furfurals (5-R?-furfural where R? is alkyl, cycloalkyl, or aryl), mixed feedstocks of 5-HMF and 5-HMF esters, mixed feedstocks of 5-HMF and 5-HMF ethers, and mixed feedstocks of 5-HMF and 5-alkyl furfurals to generate a crude carboxylic acid slurry comprising FDCA.Type: GrantFiled: January 14, 2016Date of Patent: June 13, 2017Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Kenny Randolph Parker, Paula Moody, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin, Bradford Russell Bowers, Michael Charles Morrow
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Patent number: 9604896Abstract: Disclosed is a halide-free catalyst system and method for oxidizing toluene to form benzoic acid in benzoic acid solvent. The catalyst system contains Co, at least one of Zr and Hf, and an alkali metal basic salt.Type: GrantFiled: September 3, 2014Date of Patent: March 28, 2017Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Charles Edwan Sumner, Jr., Stephanie Nicole Rollins-Testerman, Craig Steven Dunn
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Publication number: 20160332979Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.Type: ApplicationFiled: July 22, 2016Publication date: November 17, 2016Applicant: EASTMAN CHEMICAL COMPANYInventors: Kevin John Fontenot, Mesfin Ejerssa Janka, Kenny Randolph Parker, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin, Charles Edwan Sumner, JR., Shane Kipley Kirk, Paula Moody, Bradford Russell Bowers, Michael Charles Morrow
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Patent number: 9493395Abstract: Disclosed is a process for preparing two esters by reacting an aldehyde with an alcohol in the presence of a ruthenium complex compound as a catalyst. The process is particularly useful for preparing ethyl acetate and n-butyl acetate, isobutyl acetate, or 2-ethylhexyl acetate in high yield by coupling acetaldehyde with n-butanol, i-butanol, or 2-ethylhexanol.Type: GrantFiled: April 7, 2015Date of Patent: November 15, 2016Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Robert Thomas Hembre, Stephanie Rollins Testerman
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Publication number: 20160311790Abstract: A process for purifying a crude furan 2,5-dicarboxylic acid composition (cFDCA) by hydrogenation of a FDCA composition dissolved in a hydrogenation solvent such as water, and hydrogenating under mild conditions, such as at a temperature within a range of 130° C. to 225° C. by contacting the solvated FDCA composition with hydrogen in the presence of a hydrogenation catalyst under a hydrogen partial pressure within a range of 10 psi to 900 psi. A product FDCA composition is produced having a low amount of tetrahydrofuran dicarboxylic acid, a low b*, and a low amount of 5-formyl furan-2-carboxylic acid (FFCA).Type: ApplicationFiled: July 1, 2016Publication date: October 27, 2016Applicant: EASTMAN CHEMICAL COMPANYInventors: MESFIN EJERSSA JANKA, KENNY RANDOLPH PARKER, ASHFAQ SHAHANAWAZ SHAIKH, LEE PARTIN REYNOLDS, CHARLES EDWIN SUMNER, SHANE KIPLEY KIRK
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Publication number: 20160297741Abstract: Disclosed is a process for preparing two esters by reacting an aldehyde with an alcohol in the presence of a ruthenium complex compound as a catalyst. The process is particularly useful for preparing ethyl acetate and n-butyl acetate, isobutyl acetate, or 2-ethylhexyl acetate in high yield by coupling acetaldehyde with n-butanol, i-butanol, or 2-ethylhexanol.Type: ApplicationFiled: April 7, 2015Publication date: October 13, 2016Applicant: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Robert Thomas Hembre, Stephanie Rollins Testerman
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Patent number: 9458122Abstract: A process to produce a dry purified furan-2,5-dicarboxylic acid (FDCA) is described. After oxidation of 5-(hydroxymethyl)furfural (5-HMF), a crude FDCA stream is produced that is fed to a crystallization zone followed by a solid-liquid displacement zone to form a low impurity slurry stream. The solids in the low impurity slurry stream are dissolved in a dissolution zone to produce a hydrogenation feed that is hydrogenated in a hydrogenation reactor to generate a hydrogenated FDCA composition. The hydrogenated FDCA composition is routed to a crystallization zone to form a crystallized produce stream that is separated from liquid in a solid-liquid separation zone to generate a purified wet cake stream containing FDCA that can be dried in a drying zone to generate a dry purified FDCA product stream.Type: GrantFiled: September 1, 2015Date of Patent: October 4, 2016Assignee: Eastman Chemical CompanyInventors: Ashfaq Shahanawaz Shaikh, Kenny Randolph Parker, Mesfin Ejerssa Janka, Lee Reynolds Partin
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Publication number: 20160221980Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.Type: ApplicationFiled: April 12, 2016Publication date: August 4, 2016Applicant: EASTMAN CHEMICAL COMPANYInventors: KENNY RANDOLPH PARKER, MESFIN EJERSSA JANKA, ASHFAQ SHAHANAWAZ SHAIKH, LEE REYNOLDS PARTIN
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Patent number: 9382184Abstract: Processes for producing terephthalic acid are disclosed, the processes including a step of combining in a reaction medium para-xylene, a solvent comprising water and a saturated organic acid having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature for example from about 145° C. to about 175° C., in the presence of a catalyst composition comprising cobalt, manganese, zirconium, and bromine, wherein the zirconium is present in the reaction medium in an amount, for example, from 1 ppm to 50 ppm with respect to the weight of the liquid in the reaction medium.Type: GrantFiled: November 6, 2015Date of Patent: July 5, 2016Assignee: EASTMAN CHEMICAL COMPANYInventors: David Milton Lange, Ashfaq Shahanawaz Shaikh, Patrice L. Riesenberg, Mesfin Ejerssa Janka
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Publication number: 20160130244Abstract: Disclosed is a process to produce a dry purified carboxylic acid product comprising furan-2,5-dicarboxylic acid (FDCA). The process comprises oxidizing at least one oxidizable compound selected from the following group: 5-(hydroxymethyl)furfural (5-HMF), 5-HMF esters (5-R(CO)OCH2-furfural where R=alkyl, cycloalkyl and aryl), 5-HMF ethers (5-R?OCH2-furfural, where R?=alkyl, cycloalkyl and aryl), 5-alkyl furfurals (5-R?-furfural, where R?=alkyl, cycloalkyl and aryl), mixed feed-stocks of 5-HMF and 5-HMF esters and mixed feed-stocks of 5-HMF and 5-HMF ethers and mixed feed-stocks of 5-HMF and 5-alkyl furfurals to generate a crude carboxylic acid slurry comprising FDCA, removing impurities from a crude carboxylic acid slurry in a liquid displacement zone to form a low impurity slurry stream. The low impurity slurry stream is further treated in a secondary oxidation zone to produce a secondary oxidation slurry stream which is routed to a crystallization zone to form a crystallized slurry stream.Type: ApplicationFiled: January 14, 2016Publication date: May 12, 2016Applicant: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Kenny Randolph Parker, Paula Moody, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin, Bradford Russell Bowers, Michael Charles Morrow
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Publication number: 20160068655Abstract: The invention relates to a process that integrates the oxidation of toluene to benzoic acid with the production of benzoate plasticizers. Toluene is fed to an oxidation vessel in the presence of oxygen and an oxidation catalyst wherein benzoic acid serves as the solvent for the oxidation. The crude benzoic acid produced is not purified and is then reacted with an alcohol in the presence of an esterification catalyst to produce the crude benzoate ester. The oxidation catalyst, esterification catalyst, and other impurities can be mostly removed from the crude benzoate ester in subsequent washing and filtering steps. The benzoate esters produced through this method can be made in fewer steps with both yields and purities above 80%.Type: ApplicationFiled: November 13, 2015Publication date: March 10, 2016Applicant: EASTMAN CHEMICAL COMPANYInventors: Pinguan Zheng, Jonathan J. Mabe, Charles Edwan Sumner, JR., Mesfin Ejerssa Janka, Beverly Lenora Frye, Stephanie Rollins Testerman, Brent Alan Tennant
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Publication number: 20160060202Abstract: Processes for producing terephthalic acid are disclosed, the processes including a step of combining in a reaction medium para-xylene, a solvent comprising water and a saturated organic acid having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature for example from about 145° C. to about 175° C., in the presence of a catalyst composition comprising cobalt, manganese, zirconium, and bromine, wherein the zirconium is present in the reaction medium in an amount, for example, from 1 ppm to 50 ppm with respect to the weight of the liquid in the reaction medium.Type: ApplicationFiled: November 6, 2015Publication date: March 3, 2016Applicant: EASTMAN CHEMICAL COMPANYInventors: DAVID MILTON LANGE, ASHFAQ SHAHANAWAZ SHAIKH, PATRICE L. RIESENBERG, MESFIN EJERSSA JANKA
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Patent number: 9266850Abstract: Disclosed is a process to produce a dry purified carboxylic acid product comprising furan-2,5-dicarboxylic acid (FDCA). The process comprises oxidizing at least one oxidizable compound selected from the following group: 5-(hydroxymethyl)furfural (5-HMF), 5-HMF esters (5-R(CO)OCH2-furfural where R is alkyl, cycloalkyl, or aryl), 5-HMF ethers (5-R?OCH2-furfural where R? is alkyl, cycloalkyl, or aryl), 5-alkyl furfurals (5-R?-furfural where R? is alkyl, cycloalkyl, or aryl), mixed feedstocks of 5-HMF and 5-HMF esters, mixed feedstocks of 5-HMF and 5-HMF ethers, and mixed feedstocks of 5-HMF and 5-alkyl furfurals to generate a crude carboxylic acid slurry comprising FDCA.Type: GrantFiled: April 21, 2015Date of Patent: February 23, 2016Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Kenny Randolph Parker, Paula Moody, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin, Bradford Russell Bowers, Michael Charles Morrow
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Patent number: 9249118Abstract: A process for purifying a crude furan 2,5-dicarboxylic acid composition (cFDCA) by hydrogenation of a FDCA composition dissolved in a hydrogenation solvent such as water, and hydrogenating under mild conditions, such as at a temperature within a range of 130° C. to 225° C. by contacting the solvated FDCA composition with hydrogen in the presence of a hydrogenation catalyst under a hydrogen partial pressure within a range of 10 psi to 900 psi. A product FDCA composition is produced having a low amount of tetrahydrofuran dicarboxylic acid, a low b*, and a low amount of 5-formyl furan-2-carboxylic acid (FFCA).Type: GrantFiled: June 19, 2014Date of Patent: February 2, 2016Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Charles Edwan Sumner, Jr., Shane Kipley Kirk, Ashfaq Shahanawaz Shaikh, Kenny Randolph Parker
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Publication number: 20150368219Abstract: A process to produce a dry purified furan-2,5-dicarboxylic acid (FDCA) is described. After oxidation of 5-(hydroxymethyl)furfural (5-HMF), a crude FDCA stream is produced that is fed to a crystallization zone followed by a solid-liquid displacement zone to form a low impurity slurry stream. The solids in the low impurity slurry stream are dissolved in a dissolution zone to produce a hydrogenation feed that is hydrogenated in a hydrogenation reactor to generate a hydrogenated FDCA composition. The hydrogenated FDCA composition is routed to a crystallization zone to form a crystallized produce stream that is separated from liquid in a solid-liquid separation zone to generate a purified wet cake stream containing FDCA that can be dried in a drying zone to generate a dry purified FDCA product stream.Type: ApplicationFiled: September 1, 2015Publication date: December 24, 2015Applicant: EASTMAN CHEMICAL COMPANYInventors: Ashfaq Shahanawaz SHAIKH, Kenny Randolph PARKER, Mesfin Ejerssa JANKA, Lee Reynolds PARTIN
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Patent number: 9212121Abstract: Processes for producing terephthalic acid are disclosed, the processes including a step of combining in a reaction medium para-xylene, a solvent comprising water and a saturated organic acid having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature for example from about 145° C. to about 175° C., in the presence of a catalyst composition comprising cobalt, manganese, zirconium, and bromine, wherein the zirconium is present in the reaction medium in an amount, for example, from 1 ppm to 50 ppm with respect to the weight of the liquid in the reaction medium.Type: GrantFiled: September 24, 2013Date of Patent: December 15, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: David Milton Lange, Ashfaq Shahanawaz Shaikh, Patrice L. Riesenberg, Mesfin Ejerssa Janka
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Patent number: 9206149Abstract: Disclosed is a process to produce a dry purified carboxylic acid product comprising furan-2,5-dicarboxylic acid (FDCA). The process comprises oxidizing at least one oxidizable compound selected from the following group: 5-(hydroxymethyl)furfural (5-HMF), 5-HMF esters (5-R(CO)OCH2-furfural where R=alkyl, cycloalkyl and aryl), 5-HMF ethers (5-R?OCH2-furfural, where R?=alkyl, cycloalkyl and aryl), 5-alkyl furfurals (5-R?-furfural, where R?=alkyl, cycloalkyl and aryl), mixed feed-stocks of 5-HMF and 5-HMF esters and mixed feed-stocks of 5-HMF and 5-HMF ethers and mixed feed-stocks of 5-HMF and 5-alkyl furfurals to generate a crude carboxylic acid slurry comprising FDCA, cooling a crude carboxylic acid slurry in cooling zone to form a cooled slurry stream. The cooled slurry stream is routed to a solid-liquid separation zone to generate a crude wet cake stream comprising FDCA that is dried in a drying zone to generate a dry carboxylic acid product stream comprising crude FDCA (cFDCA).Type: GrantFiled: May 20, 2014Date of Patent: December 8, 2015Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, Kenny Randolph Parker, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin
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Patent number: 9199958Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.Type: GrantFiled: October 28, 2014Date of Patent: December 1, 2015Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, David Lange, Michael C. Morrow, Bradford Russell Bowers, Kenny Randolph Parker, Ashfaq Shaikh, Lee Reynolds Partin, Charles Sumner
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Patent number: 9199906Abstract: Processes for producing isophthalic acid are disclosed, the processes including a step of combining in a reaction medium meta-xylene, a solvent comprising water and a saturated organic acid having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature for example from about 145° C. to about 175° C., in the presence of a catalyst composition comprising cobalt, manganese, zirconium, and bromine, wherein the zirconium is present in the reaction medium in an amount, for example, from about 1 ppm to 50 ppm with respect to the weight of the liquid in the reaction medium.Type: GrantFiled: September 24, 2013Date of Patent: December 1, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: Ashfaq Shahanawaz Shaikh, David Milton Lange, William Lee Cook, Mesfin Ejerssa Janka
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Patent number: 9169229Abstract: A process to produce a purified dimethyl-furan-2,5-dicarboxylate (DMFD) by feeding furan dicarboxylic acid and methanol to an esterification zone to generate a crude diester composition, and purifying the crude diester composition with a physical separation process followed by crystallization, solid liquid separation, and optionally drying to produce a purified DMFD composition. A portion of the stream generated by solid liquid separation can be dissolved and subjected to crystallization and solid liquid separation repeatedly. The process is useful to produce a purified DMFD composition having a low b*, at least 98 wt. % DAFD solids, and a low concentration of 5-(methoxycarbonyl)furan-2-carboxylic acid (MCFC) and methyl 5-formylfuran-2-carboxylate (MFFC).Type: GrantFiled: November 7, 2014Date of Patent: October 27, 2015Assignee: Eastman Chemical CompanyInventors: Kenny Randolph Parker, Ashfaq Shaikh, Lee Reynolds Parton, Mesfin Ejerssa Janka