Patents by Inventor Hsueh Sung Tung

Hsueh Sung Tung 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).

  • PROCESS FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE
    Publication number: 20170174591
    Abstract: The present invention discloses a manufacturing process to produce high purity 1234yf from 245eb, which preferably includes the removal of impurities present in 245eb raw material, the dehydrofluorination of 245eb, and the removal of impurities present in final crude product. The disclosed manufacturing process allows the production of a 1234yf product with lower the levels of 1225ye and/or trifluoropropene, preferably in amounts of less than about 500, and 50 ppm, respectively.
    Type: Application
    Filed: March 6, 2017
    Publication date: June 22, 2017
    Inventors: HAIYOU WANG, HSUEH SUNG TUNG, RAJIV R. SINGH, IAN SHANKLAND
  • Integrated process for the production of 1-chloro-3,3,3-trifluoropropene
    Patent number: 9682905
    Abstract: The present invention is directed to processes for the production of 1233zd from 240fa and HF, with or without a catalyst, at a commercial scale. The 240fa and HF are fed to a reactor operating at high pressure. The resulting product stream comprising 1233zd, HCl, HF, and other byproducts is treated to one or more purification techniques including phase separation and one or more distillations to provide purified 1233zd, which meets commercial product specifications, i.e., having a GC purity of 99.5% or greater.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: June 20, 2017
    Assignee: Honeywell International Inc.
    Inventors: Stephen A. Cottrell, Hsueh Sung Tung, Konstantin A. Pokrovski
  • Fluorination process and reactor
    Patent number: 9676687
    Abstract: The invention relates to a process to prepare tetrahalopropenes, such as 2-chloro-3,3,3-trifluoropropene (1233xf). The process comprises atomizing a feed material, such as 1,1,2,3-tetrachloropropene (1230xa) and the like, and mixing it with superheated HF to form a vaporized composition of feed material and HF with substantially instantaneous contact with a vapor phase fluorination catalyst. The invention extends catalyst life and forestalls catalyst deactivation.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: June 13, 2017
    Assignee: HONEYWELL INTERNATIONAL. INC.
    Inventors: Daniel C. Merkel, Hsueh Sung Tung, Haiyou Wang, Haluk Kopkalli, Yuon Chiu
  • Process for producing 2,3,3,3-tetrafluoropropene
    Patent number: 9670117
    Abstract: The present invention relates, in part, to the discovery that, during the fluorination of certain fluoroolefin starting reagents, particularly, 1,1,2,3-tetrachloropropene (1230xa), oligomerization/polymerization of such starting reagents reduces the conversion process and leads to increased catalyst deactivation. The present invention also illustrates that providing one or more organic co-feed to the fluoroolefin starting stream reduces such oligomerization/polymerization and improves catalystic stability.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: June 6, 2017
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Selma Bektesevic, Daniel C. Merkel, Mario Joseph Nappa, Xuehui Sun, Hsueh Sung Tung, Haiyou Wang
  • Method to produce 1,1,2,3-tetrachloropropene with high yield
    Patent number: 9663425
    Abstract: The present invention provides a method for the high yield production of HCC-1230xa from the known four step method, wherein the Step 3 crude product (crude HCC-240db) is used directly as the starting material in the Step 4 reaction—but only if the crude HCC-240db contains less than 0.5 wt % of impurities selected from the group consisting of HCC-250fb, HCC-1240za, and mixtures thereof.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: May 30, 2017
    Assignee: Honeywell International Inc.
    Inventors: Terris Yang, Hsueh Sung Tung
  • Processes for selective dehydrohalogenation of halogenated alkanes
    Patent number: 9663424
    Abstract: Disclosed are processes for producing halogenated olefins, and preferably tetrafluorinated propene(s), from one or more alkanes having both fluorine substituents and non-fluorine substituents, preferably with a high degree of conversion and selectivity. Preferably the process comprises the use of a catalyzed reaction in which the catalyst is selected from the group consisting of activated carbons, halogentated mono- and di-valent metal oxides, mono- and di-valent Lewis acid metal halides, zero-valent metals, and combinations of these.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: May 30, 2017
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Haiyou Wang, Hsueh Sung Tung, Sudip Mukhopadhyay
  • PROCESS FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE
    Publication number: 20170137352
    Abstract: The present invention discloses a manufacturing process to produce high purity 1234yf from 245eb, which preferably includes the removal of impurities present in 245eb raw material, the dehydrofluorination of 245eb, and the removal of impurities present in final crude product. The disclosed manufacturing process allows the production of a 1234yf product with lower the levels of 1225ye and/or trifluoropropene, preferably in amounts of less than about 500, and 50 ppm, respectively.
    Type: Application
    Filed: January 31, 2017
    Publication date: May 18, 2017
    Inventors: HAIYOU WANG, HSUEH SUNG TUNG, RAJIV R. SINGH, IAN SHANKLAND
  • Continuous low-temperature process to produce trans-1-chloro-3,3,3-trifluoropropene
    Patent number: 9643903
    Abstract: Disclosed is process for the production of (E) 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd(E)) by conducting a continuous reaction without the use of a catalyst. Also disclosed is an integrated system for producing hydrofluoro olefins, particularly 1233zd(E). The manufacturing process includes six major unit operations: (1) a fluorination reaction of HCC-240fa (in continuous or semi-batch mode) using HF with simultaneous removal of by-product HCl and the product 1233zd(E); (2) recycle of unreacted HCC-240fa and HF together with under-fluorinated by-products back to (1); (3) separation and purification of by-product HCl; (4) separation of excess HF back to (1); (5) purification of final product, 1233zd(E); and (6) isomerization of by-product 1233zd(Z) to 1233zd(E) to maximize the process yield.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: May 9, 2017
    Assignee: Honeywell International Inc.
    Inventors: Konstantin A. Pokrovski, Daniel C. Merkel, Hsueh Sung Tung
  • PROCESS FOR REDUCING 1233xf CONCENTRATION IN 244bb
    Publication number: 20170113987
    Abstract: The present disclosure provides a method for separating 244bb from 1233xf by using solid adsorbent selected from molecular sieves having an average pore size of 5A or greater.
    Type: Application
    Filed: April 22, 2016
    Publication date: April 27, 2017
    Applicant: HONEYWELL INTERNATIONAL INC
    Inventors: Haiyou WANG, Daniel C. MERKEL, Hsueh Sung TUNG, Michael GATTER
  • Process for producing 2,3,3,3-tetrafluoropropene
    Patent number: 9586876
    Abstract: The present invention discloses a manufacturing process to produce high purity 1234yf from 245eb, which preferably includes the removal of impurities present in 245eb raw material, the dehydrofluorination of 245eb, and the removal of impurities present in final crude product. The disclosed manufacturing process allows the production of a 1234yf product with lower the levels of 1225ye and/or trifluoropropene, preferably in amounts of less than about 500, and 50 ppm, respectively.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: March 7, 2017
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Haiyou Wang, Hsueh Sung Tung, Rajiv R. Singh, Ian Shankland
  • PROCESS FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE
    Publication number: 20170057892
    Abstract: The present invention relates, in part, to the discovery that the presence of HF in a HCFC-244bb feedstream in a reaction for the preparation of HFO-1234yf results in selectivity changeover from HFO-1234yf to HCFO-1233xf. By substantially removing HF, it is shown that the selectivity to HFO-1234yf via dehydrochlorination of HCFC-244bb is improved.
    Type: Application
    Filed: November 14, 2016
    Publication date: March 2, 2017
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Haiyou WANG, Hsueh Sung TUNG
  • Methods for Removing Acidic Impurities from Halogenated Propenes
    Publication number: 20170050905
    Abstract: This invention pertains to a method for removing acidic impurity from halogenated olefins, especially methods for removing acidic impurity from halogenated propenes, and even more particularly to methods for removing acidic impurity from 1,3,3,3-tetrafluoro-1-propene (HFO-1234ze), 2,3,3,3-tetrafluoro-1-propene (HFO-1234yf), 1-chloro-3,3,3-trifluoro-1-propene (HCFO-1233zd), and 2-chloro-3,3,3-trifluoro-1-propene (HCFO-1233xf). The method is conducted by passing the halogenated olefin stream, in liquid or gas form, through a solid adsorbent bed, which contains at least one acid reactive agent.
    Type: Application
    Filed: August 9, 2016
    Publication date: February 23, 2017
    Inventors: Haiyou Wang, Hsueh Sung Tung
  • Integrated process for the production of 1-chloro-3,3,3-trifluoropropene
    Patent number: 9556091
    Abstract: The present invention is directed to processes for the production of 1233zd from 240fa and HF, with or without a catalyst, at a commercial scale. The 240fa and HF are fed to a reactor operating at high pressure. The resulting product stream comprising 1233zd, HCl, HF, and other byproducts is treated to one or more purification techniques including phase separation and one or more distillations to provide purified 1233zd, which meets commercial product specifications, i.e., having a GC purity of 99.5% or greater.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: January 31, 2017
    Assignee: Honeywell International Inc.
    Inventors: Stephen A. Cottrell, Hsueh Sung Tung, Konstantin A. Pokrovski
  • Process for producing 2-chloro-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene
    Patent number: 9540295
    Abstract: The present invention relates, in part, to the discovery that high temperatures during the fluorination of 1,1,2,3-tetrachloropropene (HCO-1230xa) to 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf) results in catalyst instability, reduced selectivity of the conversion, and/or the formation of one or more undesirable by-products. By controlling the reaction temperature, it is shown that the catalyst life may be extended and the selectivity of the reaction improved. Such control similarly results in an overall improvement in the production of certain hydrofluoroolefins, particularly 2,3,3,3-tetrafluoropropene (HFO-1234yf).
    Type: Grant
    Filed: September 29, 2012
    Date of Patent: January 10, 2017
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Selma Bektesevic, Hsueh Sung Tung, Haiyou Wang
  • METHODS FOR REMOVING HALOGENATED ETHYLENE IMPURITIES IN 2, 3, 3, 3-TETRAFLUOROPROPENE PRODUCT
    Publication number: 20170001931
    Abstract: Disclosed is a composition comprised of at least one compound selected from 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoro-1-propene and 1-chloro-3,3,3-trifluoropropene and halogenated impurity selected from the group consisting of HFO-1141 (CH2?CHF), HCFO-1140 (CH2?CHCl), and HCFO-1131 (CH2?CFCl and/or trans/cis-CHF?CHCl) and combination thereof, said halogenated impurity being present in said composition in an amount of 50 ppm or less.
    Type: Application
    Filed: September 16, 2016
    Publication date: January 5, 2017
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Haiyou WANG, Hsueh Sung TUNG
  • Process for Making HCFO-1233zd
    Publication number: 20160332936
    Abstract: Disclosed is a process for the production of 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) which includes reacting a propane feedstock comprising tetrachlorofluoropropanes, trichlorodifluoropropanes, dichlorotrifluoropropanes, or a mixture thereof, in the presence of a solid catalyst. The process generally comprises the following four steps: (i) providing a propane feedstock comprising trichlorodifluoropropanes and dichlorotrifluoropropanes, (ii) reacting the feedstock in a vapor phase reactor in the presence of HF and in the presence of a solid catalyst under conditions effective to form a product stream comprising HCFO-1233zd and unconverted starting materials, (iii) recovering or removing HCl and HF, and (iv) isolating HCFO-1233zd(E), HCFO-1233zd(Z), or both.
    Type: Application
    Filed: April 1, 2016
    Publication date: November 17, 2016
    Inventors: Haiyou Wang, Hsueh Sung Tung, Stephen A. Cottrell
  • Process for producing 2,3,3,3-tetrafluoropropene
    Patent number: 9493384
    Abstract: The present invention relates, in part, to the discovery that the presence of HF in a HCFC-244bb feedstream in a reaction for the preparation of HFO-1234yf results in selectivity changeover from HFO-1234yf to HCFO-1233xf. By substantially removing HF, it is shown that the selectivity to HFO-1234yf via dehydrochlorination of HCFC-244bb is improved.
    Type: Grant
    Filed: September 29, 2012
    Date of Patent: November 15, 2016
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Haiyou Wang, Hsueh Sung Tung
  • Method to Improve Halogenation Reactions
    Publication number: 20160326072
    Abstract: In the halogenation reaction of organic olefin compounds, an excess amount of halogen gas (fluorine, chlorine, vaporized bromine and iodine, or their combination) is normally used in order to achieve as complete as possible conversion of the organic starting material. In a conventional process, the excess halogen gas in the off-gas stream is scrubbed by caustic solution which increases the consumption of halogen and generates waste for disposal. The present invention provides a novel process to recover and reuse the excess halogen gas and thus reduce the operating cost of the process.
    Type: Application
    Filed: July 20, 2016
    Publication date: November 10, 2016
    Inventors: Terris Yang, Hsueh Sung Tung
  • METHODS FOR REGENERATING SOLID ADSORBENTS
    Publication number: 20160311735
    Abstract: The invention provides for a method of regenerating a solid adsorbent, such as a molecular sieve or activated carbon, using stable fluorinated hydrocarbon compounds such as, for example, HFC-245cb (1,1,1,2,2-pentafluoropropane, as a regeneration fluid.
    Type: Application
    Filed: April 22, 2016
    Publication date: October 27, 2016
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Haiyou WANG, Hsueh Sung Tung, Daniel C. Merkel
  • PROCESS FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE
    Publication number: 20160304420
    Abstract: The invention relates to a process to prepare 2-chloro-3,3,3-trifluoropropene (HCO-1233xf) or 2-chloro-1,1,12-tetrafluoropropane (HCFC-244bb) using dichloro-trifluoropropanes and/or trichloro-difluoropropanes, and to prepare 2-chloro-3,3,3-trifluoropropene (HCO-1233xf) using various 242 and 243 isomers.
    Type: Application
    Filed: June 23, 2016
    Publication date: October 20, 2016
    Applicant: Honeywell International, Inc.
    Inventors: Haiyou WANG, Hsueh SUNG TUNG, Selma BEKTESEVIC