Patents Assigned to Dow Technology Investments LLC
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Patent number: 10471371Abstract: Methods, apparatus, and processes are provided for a condenser including flowing a vapor stream including formaldehyde into a tube bundle in a vertical upflow reflux condenser, where a tube in the tube bundle has a length to outside diameter ratio of greater than about 170:1, flowing a cooling fluid on a shell-side of the vertical upflow reflux condenser to condense at least a portion of the vapor stream, where the condensed portion of the vapor stream forms a wetted tube internal surface area on each tube in the generally upright tube bundle; and maintaining the vapor stream velocity at a rate that provides a liquid residence time where formaldehyde condensed on the wetted internal surface area of each tube can react with water to form methylene glycol, removing at least sixty percent (60%) of formaldehyde from the vapor stream fed to the condenser.Type: GrantFiled: May 9, 2017Date of Patent: November 12, 2019Assignee: Dow Technology Investments LLCInventors: Fred A. Conneway, Clyde L. Rhodes, II, John F. Szul
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Patent number: 10407372Abstract: Embodiments of the present invention relate to processes for the hydroformylation of olefins to produce aldehydes. In some embodiments, processes of the present invention are capable of maintaining high C2-C4 olefin conversion and/or provide more compact hydroformlyation processes.Type: GrantFiled: March 15, 2017Date of Patent: September 10, 2019Assignee: Dow Technology Investments LLCInventors: Kathleen Simpson, Gerald L. Smith
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Patent number: 10351503Abstract: The present invention relates generally to processes for producing aldehydes wherein an olefinic compound, carbon monoxide, and hydrogen are reacted in the presence of a solubilized rhodium-phosphorous complex. In one embodiment, the process comprises (a) receiving a vaporized aldehyde product stream downstream from a hydroformylation reactor, the vaporized aldehyde product stream comprising aldehydes, phosphorous ligand, and aldehyde condensation by-products; (b) contacting the vaporized aldehyde product stream with a partial condenser so as to condense the phosphorous ligand and the by-products, wherein up to 10 weight percent of the vaporized stream is condensed; (c) removing the condensed phosphorous ligand and the condensed by-products from the liquid condensation stream using a refining column; and (d) further processing the vaporized aldehydes from the separate refining column.Type: GrantFiled: October 27, 2016Date of Patent: July 16, 2019Assignee: Dow Technology Investments LLCInventors: Gerald L. Smith, Kathleen Simpson
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Patent number: 10239900Abstract: The present invention relates to processes for producing organophosporous compositions having low acid content as well as processes for reprocessing partially degraded organophosporous compositions that contain high levels of phosphorous acid. In one embodiment, a process comprises: (a) receiving a solid organophosphite compound that has been recrystallized or triturated, wherein the solid organophosphite compound comprises phosphorous acid; (b) dissolving the solid organophosphite compound in a an aromatic hydrocarbon solvent in the absence of water and free amine, wherein the hydrocarbon solvent comprises an aromatic hydrocarbon, a saturated aliphatic hydrocarbon, or a mixture thereof; and (c) removing undissolved phosphorous acid from the solution, wherein the acid content of the organophosphite following step (c) is 30 ppm or less.Type: GrantFiled: September 7, 2016Date of Patent: March 26, 2019Assignee: Dow Technology Investments LLCInventors: Marinus A. Bigi, Michael A. Brammer, Glenn A. Miller
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Patent number: 10239901Abstract: The present invention relates to processes for producing organophosporous compositions having low acid content as well as processes for reprocessing partially degraded organophosporous compositions that contain high levels of phosphorous acid. In one embodiment, a process comprises: (a) receiving a solid organophosphite compound that has been recrystallized or triturated, wherein the solid organophosphite compound comprises phosphorous acid; (b) dissolving the solid organophosphite compound in an organic solvent; (c) treating the solution with a weakly basic adsorbent; and (d) collecting the treated organophosphite solution, wherein the acid content of the organophosphite following step (d) is 30 ppm or less.Type: GrantFiled: September 7, 2016Date of Patent: March 26, 2019Assignee: Dow Technology Investments LLCInventors: Marinus A. Bigi, Michael A. Brammer, Glenn A. Miller
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Patent number: 10227365Abstract: Residual wash solvent, e.g., ethyl acetate, is removed from polyphosphite, e.g., bisphosphite, crystals by a process comprising the steps of: A. Mixing the polyphosphite crystals and residual wash solvent with a secondary alcohol, e.g., isopropyl alcohol (IPA), to form a mixture of polyphosphite crystals, residual wash solvent and secondary alcohol, and B. Drying the mixture to remove the residual wash solvent and secondary alcohol to a content of less than 0.5 wt % based on the weight of the polyphosphite crystals.Type: GrantFiled: October 25, 2012Date of Patent: March 12, 2019Assignee: Dow Technology Investments LLCInventors: Glenn A. Miller, Pramod Dalvi, Ravindrakumar N. Raval
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Patent number: 10208005Abstract: Disclosed herein are methods of using scaled selectivities to assist in determining whether changes to the value of a target ethylene oxide production parameter—such as ethylene oxide production rate—used in the process of epoxidizing ethylene with a high-selectivity catalyst, have caused the process to move away from optimal operation. If the deviation from optimal operation has not worsened, it is generally unnecessary to perform a full optimization study even if the value of a target ethylene oxide production parameter has changed, which reduces or eliminates process disturbances caused by carrying out such studies. Methods are also disclosed which use both scaled selectivities and scaled reaction temperatures.Type: GrantFiled: September 30, 2015Date of Patent: February 19, 2019Assignee: Dow Technology Investments LLCInventor: Ailene Gardner Phillips
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Publication number: 20190023637Abstract: Embodiments of the present invention relate to processes for the hydroformylation of olefins to produce aldehydes. In some embodiments, processes of the present invention are capable of maintaining high C2-C4 olefin conversion and/or provide more compact hydroformlyation processes.Type: ApplicationFiled: March 15, 2017Publication date: January 24, 2019Applicant: Dow Technology Investments LLCInventors: Kathleen Simpson, Gerald L. Smith
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Publication number: 20190002485Abstract: The present invention relates to processes for producing organophosporous compositions having low acid content as well as processes for reprocessing partially degraded organophosporous compositions that contain high levels of phosphorous acid. In one embodiment, a process comprises: (a) receiving a solid organophosphite compound that has been recrystallized or triturated, wherein the solid organophosphite compound comprises phosphorous acid; (b) dissolving the solid organophosphite compound in a an aromatic hydrocarbon solvent in the absence of water and free amine, wherein the hydrocarbon solvent comprises an aromatic hydrocarbon, a saturated aliphatic hydrocarbon, or a mixture thereof; and (c) removing undissolved phosphorous acid from the solution, wherein the acid content of the organophosphite following step (c) is 30 ppm or less.Type: ApplicationFiled: September 7, 2016Publication date: January 3, 2019Applicant: Dow Technology Investments LLCInventors: Marinus A. Bigi, Michael A. Brammer, Glenn A. Miller
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Publication number: 20190002486Abstract: The present invention relates to processes for producing organophosporous compositions having low acid content as well as processes for reprocessing partially degraded organophosporous compositions that contain high levels of phosphorous acid. In one embodiment, a process comprises: (a) receiving a solid organophosphite compound that has been recrystallized or triturated, wherein the solid organophosphite compound comprises phosphorous acid; (b) dissolving the solid organophosphite compound in an organic solvent; (c) treating the solution with a weakly basic adsorbent; and (d) collecting the treated organophosphite solution, wherein the acid content of the organophosphite following step (d) is 30 ppm or less.Type: ApplicationFiled: September 7, 2016Publication date: January 3, 2019Applicant: Dow Technology Investments LLCInventors: Marinus A. Bigi, Michael A. Brammer, Glenn A. Miller
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Patent number: 10131608Abstract: A hydroformylation process wherein a water-soluble amine is contacted with the reaction fluid, liquid from the reactor is sent to an extraction zone, and a neutralized phosphorus acidic compound is at least partially removed from the extraction zone.Type: GrantFiled: March 10, 2015Date of Patent: November 20, 2018Assignee: Dow Technology Investments LLCInventors: Glenn A. Miller, Thomas C. Eisenschmid, Michael A. Brammer, Michael C. Becker, Rick B. Watson
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Patent number: 10077281Abstract: A ligand crystal structure of 6,6?-[[3,3?,5,5?-tetrakis(1,1-dimethylethyl)-[1,1?-biphenyl]-2,2?-diyl]bis(oxy)]bisdibenzo[d,f][1,3,2]-dioxaphosphepin.Type: GrantFiled: June 15, 2016Date of Patent: September 18, 2018Assignee: Dow Technology Investments LLCInventors: Michael A. Brammer, Glenn A. Miller, Marinus A. Bigi, George R. Phillips, Britt A. Vanchura, II, Kenneth L. Kearns, Jr.
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Patent number: 10023516Abstract: Catalytic metal loss when using a hydroformylation catalyst comprising an organophosphite ligand is ameliorated by adding CO to a strip gas vaporizer.Type: GrantFiled: November 18, 2015Date of Patent: July 17, 2018Assignee: Dow Technology Investments LLCInventors: Michael A. Brammer, George R. Phillips, Thomas C. Eisenschmid, Irvin B. Cox, Robert Hetterley, Michael John Bainbridge
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Patent number: 10010856Abstract: At least one method to efficiently produce alkylene oxide from partial oxidation of hydrocarbons using a high efficiency heterogeneous catalyst in a fixed bed enclosed within a reaction vessel, and a reaction vessel constructed to facilitate the same.Type: GrantFiled: June 1, 2015Date of Patent: July 3, 2018Assignee: DOW TECHNOLOGY INVESTMENTS LLCInventors: Max M. Tirtowidjojo, Christina Zarth, Subrata Sen, Pramod D. Patil
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Publication number: 20180141968Abstract: A ligand crystal structure of 6,6?-[[3,3?,5,5?-tetrakis(1,1-dimethylethyl)-[1,1?-biphenyl]-2,2?-diyl]bis(oxy)]bisdibenzo[d,f][1,3,2]-dioxaphosphepin.Type: ApplicationFiled: June 15, 2016Publication date: May 24, 2018Applicant: Dow Technology Investments LLCInventors: Michael A. Brammer, Glenn A. Miller, Marinus A. Bigi, George R. Phillips, Britt A. Vanchura, II, Kenneth L. Kearns, Jr.
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Patent number: 9908861Abstract: Methods of preparing a second high-efficiency, rhenium-promoted silver catalyst for producing alkylene oxide from an alkylene based on a first catalyst are disclosed and described. In accordance with the disclosed methods, the first and second catalysts include at least one promoter that includes a rhenium promoter. The target catalyst concentrations of one or more promoters of the at least one promoter on the second catalyst are determined based on the values of a catalyst reference property for the two catalysts and the concentration of the one or more promoters of the at least one promoter on the first catalyst. Suitable catalyst reference properties include carrier specific surface area and silver specific surface area. Reaction systems utilizing the first and second catalysts are also described.Type: GrantFiled: April 11, 2017Date of Patent: March 6, 2018Assignee: Dow Technology Investments LLCInventors: Hirokazu Shibata, Arun Basrur, Srikant Gopal, Mark McAdon, Albert Cheng-Yu Liu, Liping Zhang, Ernest R. Frank
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Patent number: 9868686Abstract: The present invention relates generally to hydroformylation processes.Type: GrantFiled: February 28, 2017Date of Patent: January 16, 2018Assignee: Dow Technology Investments LLCInventors: Glenn A. Miller, Victoria L. Biedenstein, Atul Manilal Shah, Martin Lucas Smidt, David Keith Welch
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Patent number: 9856227Abstract: A method for the production of ethylene oxide wherein the partial pressure of water vapor at the inlet of the reactor is at least about 8 kPa using a high purity carrier comprising alpha-alumina, a promoting amount of at least one Group IA metal, and a promoting amount of rhenium.Type: GrantFiled: January 19, 2017Date of Patent: January 2, 2018Assignee: Dow Technology Investments LLCInventors: Liping Zhang, Mark H. McAdon, Ernest R. Frank
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Patent number: 9795952Abstract: A process for the hydroformylation of ethylene, with a transition metal, e.g., rhodium, catalyst promoted with a bidentate ligand of Formula I, II or III in which each R1-R24 are independently a hydrogen, a hydrocarbyl group, an aromatic ring, a heteroaromatic ring or a halogen atom, or a heterocarbyl group. X1 is CH2 or O, while X2 is O or C(R25)2, where each R25 may be the same or different and is a hydrogen, a cycloaliphatic group, an aromatic ring, a heteroaromatic ring or a halogen atom, or a heterocarbyl group, wherein two R25 groups may combine in a fused ring, and Y is a pyrrole group bound via the nitrogen atom to phosphorus, wherein each pyrrole group may bear multiple substituents selected from among the groups alkyl, alkoxy, acyl, carboxyl, carboxylate, cyano, —SO3H, sulfonate, amino, trifluoromethyl and halogen.Type: GrantFiled: November 19, 2013Date of Patent: October 24, 2017Assignee: Dow Technology Investments LLCInventors: Olivier Diebolt, Hugo Tricas, Pertrus W. N. M. van Leeuwen, Heather Anne Spinney, Robert David John Froese, Michael A. Brammer
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Publication number: 20170239590Abstract: Methods, apparatus, and processes are provided for a condenser including flowing a vapor stream including formaldehyde into a tube bundle in a vertical upflow reflux condenser, where a tube in the tube bundle has a length to outside diameter ratio of greater than about 170:1, flowing a cooling fluid on a shell-side of the vertical upflow reflux condenser to condense at least a portion of the vapor stream, where the condensed portion of the vapor stream forms a wetted tube internal surface area on each tube in the generally upright tube bundle; and maintaining the vapor stream velocity at a rate that provides a liquid residence time where formaldehyde condensed on the wetted internal surface area of each tube can react with water to form methylene glycol, removing at least sixty percent (60%) of formaldehyde from the vapor stream fed to the condenser.Type: ApplicationFiled: May 9, 2017Publication date: August 24, 2017Applicant: Dow Technology Investments LLCInventors: Fred A. Conneway, Clyde L. Rhodes, II, John F. Szul