Patents by Inventor Ashfaq Shahanawaz Shaikh
Ashfaq Shahanawaz Shaikh 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: 10350584Abstract: 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: April 12, 2016Date of Patent: July 16, 2019Assignee: Eastman Chemical CompanyInventors: Kenny Randolph Parker, Mesfin Ejerssa Janka, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin
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Publication number: 20190023677Abstract: Disclosed is a process to produce a purified vapor comprising dialkyl-furan-2,5-dicarboxylate (DAFD). Furan-2,5-dicarboxylic acid (FDCA) and an alcohol in an esterification zone to generate a crude diester stream containing dialkyl furan dicarboxylate (DAFD), unreacted alcohol, 5-(alkoxycarbonyl)furan-2-carboxylic acid (ACFC), and alkyl furan-2-carboxylate (AFC). The esterification zone comprises at least one reactor that has been previously used in an DMT process.Type: ApplicationFiled: March 20, 2018Publication date: January 24, 2019Applicant: EASTMAN CHEMICAL COMPANYInventors: KEVIN JOHN FONTENOT, Mesfin Ejerssa Janka, Kenny Randolph Parker, Ashfaq Shahanawaz Shaikh
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Publication number: 20180369711Abstract: Selective recovery of C2 to C4 hydrocarbons is achieved through the use of a converging-diverging nozzle, or de Laval nozzle. The vapor stream comprising C2 to C4 hydrocarbons is fed into an inlet of a de Laval nozzle having a throat. The vapor stream may have an initial temperature of between 0° C. and 100° C., and an initial pressure of between 200 psig and 500 psig. In the de Laval nozzle, the vapor stream expands after passing through the throat of the de Laval nozzle, producing a vapor stream having reduced temperature and pressure. Then, C2 to C4 hydrocarbons condense from the reduced-temperature vapor stream as liquid droplets, which may be recovered. Fractionation of C2 to C4 hydrocarbons by means of a de Laval nozzle is possible; the technique allows selective recovery of propane from a mixture of propane and ethane.Type: ApplicationFiled: December 8, 2016Publication date: December 27, 2018Applicants: Eastman Chemical Company, North Carolina State UniversityInventors: Ashfaq Shahanawaz Shaikh, Thomas Allen Puckette, Scott Owens, Syed Maaz, Jack R. Edwards
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Publication number: 20180363979Abstract: Selective recovery of C2 to C4 hydrocarbons is achieved through the use of a converging-diverging nozzle, or de Laval nozzle. The vapor stream comprising C2 to C4 hydrocarbons is fed into an inlet of a de Laval nozzle having a throat. The vapor stream may have an initial temperature of between 0° C. and 100° C., and an initial pressure of between 200 psig and 500 psig. In the de Laval nozzle, the vapor stream expands after passing through the throat of the de Laval nozzle, producing a vapor stream having reduced temperature and pressure. Then, C2 to C4 hydrocarbons condense from the reduced-temperature vapor stream as liquid droplets, which may be recovered. Fractionation of C2 to C4 hydrocarbons by means of a de Laval nozzle is possible; the technique allows selective recovery of a stream enriched in propene from a mixture of propane and propene.Type: ApplicationFiled: December 8, 2016Publication date: December 20, 2018Inventors: Ashfaq Shahanawaz SHAIKH, Anthony PONDER, Ginette TOLLESON
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Publication number: 20180290994Abstract: 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.Type: ApplicationFiled: June 11, 2018Publication date: October 11, 2018Applicant: 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: 20180215725Abstract: 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.Type: ApplicationFiled: March 29, 2018Publication date: August 2, 2018Applicant: EASTMAN CHEMICAL COMPANYInventors: MESFIN EJERSSA JANKA, Kenny Randolph Parker, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin, Charles Edwan Sumner, Shane Kipley Kirk
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Publication number: 20180201596Abstract: 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: March 15, 2018Publication date: July 19, 2018Applicant: EASTMAN CHEMICAL COMPANYInventors: MESFIN EJERSSA JANKA, KENNY RANDOLPH PARKER, ASHFAQ SHAHANAWAZ SHAIKH, LEE REYNOLDS PARTIN
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Patent number: 10011579Abstract: 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: May 22, 2017Date of Patent: July 3, 2018Assignee: 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: 9944615Abstract: 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: July 1, 2016Date of Patent: April 17, 2018Assignee: EASTMAN CHEMICAL COMPANYInventors: Mesfin Ejerssa Janka, Kenny Randolph Parker, Ashfaq Shahanawaz Shaikh, Lee Reynolds Partin, Charles Edwan Sumner, Jr., Shane Kipley Kirk
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Publication number: 20170260154Abstract: 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: May 22, 2017Publication date: September 14, 2017Applicant: 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: 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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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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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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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: 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