Patents by Inventor Ha H. Nguyen
Ha H. Nguyen 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: 11806701Abstract: Methods for preparing molybdenum-based catalyst for epoxidation reactions using MPG sourced from a propylene oxide/styrene monomer (POSM) production process are described. Streams exiting from the POSM reactor are combined and separated to isolate an aqueous-based, MPG-containing purge stream from other recoverable byproducts of the POSM process. This MPG-containing purge stream is then used as is in the catalyst preparation of molybdenum-based catalyst for epoxidation. Alternatively, the MPG-containing purge stream can undergo additional purification treatments before being utilized in the catalyst preparation.Type: GrantFiled: June 25, 2021Date of Patent: November 7, 2023Assignee: Lyondell Chemical Technology, L.P.Inventors: Ha H. Nguyen, Anthony S. Dearth, Harold V. Larson
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Publication number: 20230105219Abstract: Methods and systems for removing or reducing water and producing epoxide. The methods may include providing a first mixture that includes t-butyl hydroperoxide, t-butyl alcohol, and a first amount of water; and contacting at least a portion of the first mixture with a membrane to reduce the amount of water in the first mixture.Type: ApplicationFiled: October 3, 2022Publication date: April 6, 2023Applicant: Lyondell Chemical Technology, L.P.Inventors: Ha H. Nguyen, Xueyong Yang
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Publication number: 20220396481Abstract: Disclosed herein are hydrogen peroxide solutions in non-aqueous solvents and processes for manufacturing the non-aqueous hydrogen peroxide solutions starting from an aqueous hydrogen peroxide solution. Exemplary non-aqueous solvents include alcohols such as tert-butyl alcohol. It has been discovered that when tert-butyl alcohol and an aqueous hydrogen peroxide solution are combined in certain ratios, and water from this mixture is removed by an azeotropic distillation, tert-butyl alcohol-based hydrogen peroxide solution comprising less than 1 wt % water are readily achieved.Type: ApplicationFiled: June 2, 2022Publication date: December 15, 2022Applicant: Lyondell Chemical Technology, L.P.Inventors: Ha H. Nguyen, Randy Magadan
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Patent number: 11247962Abstract: Methods and systems for recovering materials from streams from processes for the co-production of propylene oxide and styrene monomer. The processes may permit the recovery of products, such a mono-propylene glycol, or the recycling of products, such as ?-methyl benzyl alcohol.Type: GrantFiled: May 6, 2020Date of Patent: February 15, 2022Assignee: Lyondell Chemical Technology, L.P.Inventors: Ha H. Nguyen, Anthony S. Dearth
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Publication number: 20220014410Abstract: In embodiments of the presently described subject matter, two efficient PAPR reduction methods for OFDM signals based upon the principle of tone reservation and building upon the clipping noise analysis presented in “Analysis of clipping noise and tonereservation algorithms for peak reduction in OFDM systems,” L. Wang and C. Tellambura, IEEE Trans. Veh. Technol., vol. 57, pp. 1675-1694, May 2008 are provided, each comprising two stages. The first stage is performed offline to prepare a set of cancelation signals based on the settings of the OFDM system. In particular, these cancellation signals are constructed to cancel signals at different levels of maximum instantaneous power that are above a predefined threshold. The second stage is performed online and in an iterative manner to reduce the peaks of OFDM symbols by using the cancellation signals constructed in the first stage.Type: ApplicationFiled: September 23, 2021Publication date: January 13, 2022Inventors: Quang NGUYEN, Ha H NGUYEN, Brian BERSCHEID, Eric SALT
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Publication number: 20210402386Abstract: Methods for preparing molybdenum-based catalyst for epoxidation reactions using MPG sourced from a propylene oxide/styrene monomer (POSM) production process are described. Streams exiting from the POSM reactor are combined and separated to isolate an aqueous-based, MPG-containing purge stream from other recoverable byproducts of the POSM process. This MPG-containing purge stream is then used as is in the catalyst preparation of molybdenum-based catalyst for epoxidation. Alternatively, the MPG-containing purge stream can undergo additional purification treatments before being utilized in the catalyst preparation.Type: ApplicationFiled: June 25, 2021Publication date: December 30, 2021Applicant: Lyondell Chemical Technology, L.P.Inventors: Ha H. Nguyen, Anthony S. Dearth, Harold V. Larson
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Patent number: 11140011Abstract: In embodiments of the presently described subject matter, two efficient PAPR reduction methods for OFDM signals based upon the principle of tone reservation and building upon the clipping noise analysis presented in “Analysis of clipping noise and tone reservation algorithms for peak reduction in OFDM systems,” L. Wang and C. Tellambura, IEEE Trans. Veh. Technol., vol. 57, pp. 1675-1694, May 2008 are provided, each comprising two stages. The first stage is performed offline to prepare a set of cancellation signals based on the settings of the OFDM system. In particular, these cancellation signals are constructed to cancel signals at different levels of maximum instantaneous power that are above a predefined threshold. The second stage is performed online and in an iterative manner to reduce the peaks of OFDM symbols by using the cancellation signals constructed in the first stage.Type: GrantFiled: February 18, 2020Date of Patent: October 5, 2021Assignee: Vecima Networks Inc.Inventors: Quang Nguyen, Ha H. Nguyen, Brian Berscheid, Eric Salt
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Patent number: 11014899Abstract: Methods of drying streams that include propylene oxide. The methods may include contacting a stream that includes propylene oxide with molecular sieves. The molecular sieves may be in a drying unit, and may be regenerated. The streams that include propylene oxide may include one or more other organic compounds.Type: GrantFiled: May 13, 2020Date of Patent: May 25, 2021Assignee: Lyondell Chemical Technology, L.P.Inventors: Xueyong Yang, Daniel F. White, Ha H. Nguyen, Robert J. Rebman, Chelsee A. Arceneaux
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Patent number: 10988564Abstract: A method of producing dimethoxymethane oligomers (DMMn), the method comprising: reacting a formaldehyde source and dimethoxymethane monomer (DMM1) in the presence of an acidic catalyst to produce a reaction effluent comprising DMMn and unreacted DMM1; and separating, from the reaction effluent, DMM1-2 including unreacted DMM1 and DMMn having a chain length n equal to 2 (DMM2), dimethoxymethane oligomers having a chain length n in the range of from 2-5 (DMM2-5), dimethoxymethane oligomers having a chain length n of ?5 (DMM5+), or a combination thereof, wherein the separating comprises distillation in the presence of at least one alcohol, a distillate fuel, or both.Type: GrantFiled: March 8, 2019Date of Patent: April 27, 2021Assignee: Lyondell Chemical Technology, L.P.Inventors: James N. Waguespack, David S. Mannel, Larry W. Arndt, Ha H. Nguyen, Barbara Kimmich
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Patent number: 10851320Abstract: A composition comprising a distillate fuel, an oligomer portion comprising at least one dimethoxymethane oligomer, and a stabilizer comprising one or more alcohols. A composition comprising a distillate fuel, and an oligomer portion comprising at least one dimethoxymethane oligomer, DMMn, wherein n is less than 3 and/or greater than 4. A composition comprising a distillate fuel, and less than 10 volume percent of an oligomer portion, wherein the oligomer portion comprises at least one dimethoxymethane oligomer. A method comprising separating, from a mixture of DMMn oligomers, one or more DMMn fractions comprising oligomers of a desired chain length n, and combining a desired amount of one or more of the separated DMMn fractions with a distillate fuel to provide a fuel composition. A composition comprising a distillate fuel that includes renewable distillate fuel, DMMn and/or alcohol.Type: GrantFiled: October 24, 2018Date of Patent: December 1, 2020Assignee: Lyondell Chemical Technology, L.P.Inventors: James N. Waguespack, Larry W. Arndt, David S. Mannel, Ha H. Nguyen, Barbara Kimmich
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Publication number: 20200361888Abstract: Methods of drying streams that include propylene oxide. The methods may include contacting a stream that includes propylene oxide with molecular sieves. The molecular sieves may be in a drying unit, and may be regenerated. The streams that include propylene oxide may include one or more other organic compounds.Type: ApplicationFiled: May 13, 2020Publication date: November 19, 2020Applicant: Lyondell Chemical Technology, L.P.Inventors: Xueyong Yang, Daniel F. White, Ha H. Nguyen, Robert J. Rebman, Chelsee A. Arceneaux
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Publication number: 20200354300Abstract: Methods and systems for recovering materials from streams from processes for the co-production of propylene oxide and styrene monomer. The processes may permit the recovery of products, such a mono-propylene glycol, or the recycling of products, such as ?-methyl benzyl alcohol.Type: ApplicationFiled: May 6, 2020Publication date: November 12, 2020Applicant: Lyondell Chemical Technology, L.P.Inventors: Ha H. Nguyen, Anthony S. Dearth
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Publication number: 20200267040Abstract: In embodiments of the presently described subject matter, two efficient PAPR reduction methods for OFDM signals based upon the principle of tone reservation and building upon the clipping noise analysis presented in “Analysis of clipping noise and tonereservation algorithms for peak reduction in OFDM systems,” L. Wang and C. Tellambura, IEEE Trans. Veh. Technol., vol. 57, pp. 1675-1694, May 2008 are provided, each comprising two stages. The first stage is performed offline to prepare a set of cancellation signals based on the settings of the OFDM system. In particular, these cancellation signals are constructed to cancel signals at different levels of maximum instantaneous power that are above a predefined threshold. The second stage is performed online and in an iterative manner to reduce the peaks of OFDM symbols by using the cancellation signals constructed in the first stage.Type: ApplicationFiled: February 18, 2020Publication date: August 20, 2020Inventors: Quang Nguyen, Ha H. Nguyen, Brian Berscheid, Eric Salt
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Patent number: 10710004Abstract: A method including contacting an organic stream with water and carbon dioxide, whereby sodium is extracted from the organic stream, and separating an aqueous sodium salt-containing phase from an organic phase comprising a reduced sodium content. The organic stream can be a heavy residue formed in the co-production of propylene oxide and styrene. Contacting can include combining the carbon dioxide with the water to form a CO2-saturated water stream and contacting the CO2-saturated water stream with the organic stream, and/or combining the organic stream and the water to form a mixture and injecting the carbon dioxide as a gas thereinto. The method can further include repeating the contacting and the separating one or more times on the organic phase, subjecting the organic phase to ion exchange, or both, to obtain an organic phase having a further reduced sodium content. A system for carrying out the method is also provided.Type: GrantFiled: February 1, 2018Date of Patent: July 14, 2020Assignee: Lyondell Chemical Technology, L.P.Inventors: Sandor Nagy, Ha H. Nguyen, Dan D. Lindsey, Barbara Kimmich, Nicholas Bruschi, James D. Montano-Lawrence, Justin E. Turner, Debra L. Jackson, Anthony S. Dearth
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Patent number: 10526549Abstract: The present disclosure relates to a method including subjecting an organic stream comprising at least one oxygenate to hydrotreatment, whereby a hydrotreatment product comprising ethylbenzene is produced, wherein the organic stream is a product of a process for the production of propylene oxide; and separating an ethylbenzene product stream from the hydrotreatment product, to yield a residual stream.Type: GrantFiled: April 24, 2018Date of Patent: January 7, 2020Assignee: Lyondell Chemical Technology, L.P.Inventors: Sandor Nagy, Dan D. Lindsey, Barbara Kimmich, Justin E. Turner, Nicholas Bruschi, Ha H. Nguyen, Pranit S. Metkar, Anthony S. Dearth
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Publication number: 20190276579Abstract: A method of producing dimethoxymethane oligomers (DMMn), the method comprising: reacting a formaldehyde source and dimethoxymethane monomer (DMM1) in the presence of an acidic catalyst to produce a reaction effluent comprising DMMn and unreacted DMM1; and separating, from the reaction effluent, DMM1-2 including unreacted DMM1 and DMMn having a chain length n equal to 2 (DMM2), dimethoxymethane oligomers having a chain length n in the range of from 2-5 (DMM2-5), dimethoxymethane oligomers having a chain length n of ?5 (DMM5+), or a combination thereof, wherein the separating comprises distillation in the presence of at least one alcohol, a distillate fuel, or both.Type: ApplicationFiled: March 8, 2019Publication date: September 12, 2019Applicant: Lyondell Chemical Technology, L.P.Inventors: James N. Waguespack, David S. Mannel, Larry W. Arndt, Ha H. Nguyen, Barbara Kimmich
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Publication number: 20190119590Abstract: A composition comprising a distillate fuel, an oligomer portion comprising at least one dimethoxymethane oligomer, and a stabilizer comprising one or more alcohols. A composition comprising a distillate fuel, and an oligomer portion comprising at least one dimethoxymethane oligomer, DMMn, wherein n is less than 3 and/or greater than 4. A composition comprising a distillate fuel, and less than 10 volume percent of an oligomer portion, wherein the oligomer portion comprises at least one dimethoxymethane oligomer. A method comprising separating, from a mixture of DMMn oligomers, one or more DMMn fractions comprising oligomers of a desired chain length n, and combining a desired amount of one or more of the separated DMMn fractions with a distillate fuel to provide a fuel composition. A composition comprising a distillate fuel that includes renewable distillate fuel, DMMn and/or alcohol.Type: ApplicationFiled: October 24, 2018Publication date: April 25, 2019Applicant: Lyondell Chemical Technology, L.P.Inventors: James N. Waguespack, Larry W. Arndt, David S. Mannel, Ha H. Nguyen, Barbara Kimmich
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Publication number: 20180312764Abstract: The present disclosure relates to a method including subjecting an organic stream comprising at least one oxygenate to hydrotreatment, whereby a hydrotreatment product comprising ethylbenzene is produced, wherein the organic stream is a product of a process for the production of propylene oxide; and separating an ethylbenzene product stream from the hydrotreatment product, to yield a residual stream.Type: ApplicationFiled: April 24, 2018Publication date: November 1, 2018Applicant: Lyondell Chemical Technology, L.P.Inventors: Sandor Nagy, Dan D. Lindsey, Barbara Kimmich, Justin E. Turner, Nicholas Bruschi, Ha H. Nguyen, Pranit S. Metkar, Anthony S. Dearth
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Patent number: 10100009Abstract: A process for forming a concentrated solution, including distilling in a distillation zone comprised of 10 or more theoretical distillation stages, at a pressure of no greater than 300 mm Hg and a reflux ratio (D/L) of at least 1:1, an amount of an initial solution comprised of tert-butyl hydroperoxide (TBHP) in tert-butyl alcohol (TBA) having a TBHP concentration of up to 60 wt. % and a total impurity content greater than 0.01 wt. %, for a time and under distillation conditions to form a concentrated solution comprised of TBHP in TBA; and separating an overhead distillate from the distillation zone so that the concentrated solution thereafter has a TBHP concentration greater than 60 wt. %, a TBA concentration less than 40 wt. %, a water impurity content no greater than 0.1 wt. % and a total impurity content of no greater than 1 wt. %. Related epoxidation catalyst formation and epoxidation processes are also described.Type: GrantFiled: October 5, 2017Date of Patent: October 16, 2018Assignee: Lyondell Chemical Technology, L.P.Inventors: Ha H. Nguyen, Te Chang, William H. McDowell
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Publication number: 20180221787Abstract: A method including contacting an organic stream with water and carbon dioxide, whereby sodium is extracted from the organic stream, and separating an aqueous sodium salt-containing phase from an organic phase comprising a reduced sodium content. The organic stream can be a heavy residue formed in the co-production of propylene oxide and styrene. Contacting can include combining the carbon dioxide with the water to form a CO2-saturated water stream and contacting the CO2-saturated water stream with the organic stream, and/or combining the organic stream and the water to form a mixture and injecting the carbon dioxide as a gas thereinto. The method can further include repeating the contacting and the separating one or more times on the organic phase, subjecting the organic phase to ion exchange, or both, to obtain an organic phase having a further reduced sodium content. A system for carrying out the method is also provided.Type: ApplicationFiled: February 1, 2018Publication date: August 9, 2018Applicant: Lyondell Chemical Technology, L.P.Inventors: Sandor Nagy, Ha H. Nguyen, Dan D. Lindsey, Barbara Kimmich, Nicholas Bruschi, James D. Montano-Lawrence, Justin E. Turner, Debra L. Jackson, Anthony S. Dearth