Patents by Inventor Yian Zhai

Yian Zhai 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 reducing 3,3,3-trifluoropropyne in 2,3,3,3-tetrafluoropropene
    Patent number: 10913697
    Abstract: The invention relates to a process for reducing the concentration of a fluorinated alkyne impurity, such as 3,3,3-trifluoropropyne (TFPY), in 2,3,3,3-tetrafluoropropene (HFO-1234yf) which comprises contacting such a mixture with a caustic material, such as sodium hydroxide (NaOH), under conditions effective to reduce the concentration of the fluorinated alkyne impurity, including in some practices reducing the concentration by at least about 50%.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: February 9, 2021
    Assignee: Honeywell International Inc.
    Inventors: Haiyou Wang, Hsueh Sung Tung, Willie Josue Perez, Yian Zhai, Ralph John Borowski, Fang Huang Tu, Lucas Peter Labuda, John L. Welch
  • PROCESS FOR REDUCING 3,3,3-TRIFLUOROPROPYNE IN 2,3,3,3-TETRAFLUOROPROPENE
    Publication number: 20200055804
    Abstract: The invention relates to a process for reducing the concentration of a fluorinated alkyne impurity, such as 3,3,3-trifluoropropyne (TFPY), in 2,3,3,3-tetrafluoropropene (HFO-1234yf) which comprises contacting such a mixture with a caustic material, such as sodium hydroxide (NaOH), under conditions effective to reduce the concentration of the fluorinated alkyne impurity, including in some practices reducing the concentration by at least about 50%.
    Type: Application
    Filed: November 2, 2017
    Publication date: February 20, 2020
    Inventors: Haiyou Wang, Hsueh Sung Tung, Willie Josue Perez, Yian Zhai, Ralph John Borowski, Fang Huang Tu, Lucas Peter Labuda, John L. Welch
  • Process for making 2,3,3,3-tetrafluoropropene and/or vinylidene fluoride
    Patent number: 10071940
    Abstract: Disclosed is a process for the formation of a mixture of the compounds 2,3,3,3-tetrafluoropropene (HFO-1234yf) and vinylidene fluoride, comprising pyrolyzing 1,1,2-trifluoro-2-trifluoro-methyl-cyclobutane under conditions effective to produce a reaction product comprising HFO-1234yf and vinylidene fluoride in a 1234yf:vinylidene fluoride molar ratio of from about 0.5 to about 1.2.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: September 11, 2018
    Assignee: Honeywell International Inc.
    Inventors: Rajiv Banavali, Haridasan K. Nair, Yian Zhai
  • Process for the production of fluorinated cyclobutane
    Patent number: 10005705
    Abstract: The production of 1, 1, 2-trifluoro-2-(trifluoromethyl)cyclobutane (TFMCB). More specifically, the present invention relates to a process for making 1, 1, 2-trifluoro-2-(trifluoromethyl)cyclobutane via a continuous catalytic reaction from commercially available raw materials ethylene and hexafluoropropene.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: June 26, 2018
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, Rajiv Banavali, Yian Zhai, Glenn Matthies
  • Process for Making 2,3,3,3-Tetrafluoropropene and/or Vinylidene Fluoride
    Publication number: 20180072642
    Abstract: Disclosed is a process for the formation of a mixture of the compounds 2,3,3,3-tetrafluoropropene (HFO-1234yf) and vinylidene fluoride, comprising pyrolyzing 1,1,2-trifluoro-2-trifluoro-methyl-cyclobutane under conditions effective to produce a reaction product comprising HFO-1234yf and vinylidene fluoride in a 1234yf:vinylidene fluoride molar ratio of from about 0.5 to about 1.2.
    Type: Application
    Filed: September 20, 2017
    Publication date: March 15, 2018
    Inventors: Rajiv Banavali, Haridasan K. Nair, Yian Zhai
  • PROCESS FOR THE PRODUCTION OF FLUORINATED CYCLOBUTANE
    Publication number: 20180065905
    Abstract: The production of 1, 1, 2-trifluoro-2-(trifluoromethyl)cyclobutane (TFMCB). More specifically, the present invention relates to a process for making 1, 1, 2-trifluoro-2-(trifluoromethyl)cyclobutane via a continuous catalytic reaction from commercially available raw materials ethylene and hexafluoropropene.
    Type: Application
    Filed: November 8, 2017
    Publication date: March 8, 2018
    Inventors: Haridasan K. Nair, Rajiv Banavali, Yian Zhai, Glenn Matthies
  • Process for the production of fluorinated cyclobutane
    Patent number: 9856193
    Abstract: The production of 1,1,2-trifluoro-2-(trifluoromethyl)cyclobutane (TFMCB). More specifically, the present invention relates to a process for making 1,1,2-trifluoro-2-(trifluoromethyl)cyclobutane via a continuous catalytic reaction from commercially available raw materials ethylene and hexafluoropropene.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: January 2, 2018
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, Rajiv Banavali, Yian Zhai, Glenn Matthies
  • Process for making 2,3,3,3-tetrafluoropropene and/or vinylidine fluoride
    Patent number: 9790151
    Abstract: Disclosed is a process for the formation of a mixture of the compounds 2,3,3,3-tetrafluoropropene (1234yf) and vinylidene fluoride, comprising pyrolyzing 1,1,2-trifluoro-2-trifluoro-methyl-cyclobutane under conditions effective to produce a reaction product comprising 1234yf and vinylidene fluoride in a 1234yf:vinylidene fluoride molar ratio of from about 0.5 to about 1.2.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: October 17, 2017
    Assignee: Honeywell International Inc.
    Inventors: Rajiv Banavali, Haridasan K. Nair, Yian Zhai
  • PROCESS FOR THE PRODUCTION OF FLUORINATED CYCLOBUTANE
    Publication number: 20170233316
    Abstract: The production of 1,1,2-trifluoro-2-(trifluoromethyl)cyclobutane (TFMCB). More specifically, the present invention relates to a process for making 1,1,2-trifluoro-2-(trifluoromethyl)cyclobutane via a continuous catalytic reaction from commercially available raw materials ethylene and hexafluoropropene.
    Type: Application
    Filed: May 1, 2017
    Publication date: August 17, 2017
    Inventors: Haridasan K. Nair, Rajiv Banavali, Yian Zhai, Glenn Matthies
  • Process for Making 2,3,3,3-Tetrafluoropropene and/or Vinylidine Fluoride
    Publication number: 20170137353
    Abstract: Disclosed is a process for the formation of a mixture of the compounds 2,3,3,3-tetrafluoropropene (1234yf) and vinylidine fluoride, comprising pyrolyzing 1,1,2-trifluoro-2-trifluoro-methyl-cyclobutane under conditions effective to produce a reaction product comprising 1234yf and vinylidine fluoride in a 1234yf:vinylidine fluoride molar ratio of from about 0.5 to about 1.2.
    Type: Application
    Filed: November 8, 2016
    Publication date: May 18, 2017
    Inventors: Rajiv Banavali, Haridasan K. Nair, Yian Zhai
  • FLUOROSURFACTANTS HAVING IMPROVED BIODEGRADABILITY
    Publication number: 20160023973
    Abstract: To address the problem of insufficient biodegradability of perfluorinated surfactants, the present invention provides biodegradable fluorosurfactants derived from olefins having —CHR, —CHRf, —CHF, and/or —CH2 groups, where R is an alkyl group and Rf is a perfluoro or fluroroalkyl group. Preferably, the —CHR, —CHRf, —CHF, and/or —CH2 groups are contained within partially fluorinated alkenes.
    Type: Application
    Filed: October 7, 2015
    Publication date: January 28, 2016
    Inventors: Haridasan K. Nair, Yian Zhai, Andrew J. Poss, Rajiv R. Singh, David Nalewajek
  • Dehalogenation of trans-1-chloro-3,3,3-trifluoropropene
    Patent number: 9216932
    Abstract: The present invention is related to making hydrofluorocarbons (HCFCs), more specifically, 3,3,3-trifluoropropyne (TFP), from trans-1-chloro-3,3,3-trifluoropropene (trans-1233zd) by contacting the trans-1233zd with a base. Preferably, the base is potassium hydroxide or potassium tert-butoxide, which may or may not be dissolved in as solvent.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: December 22, 2015
    Assignee: Honeywell International Inc.
    Inventors: Yian Zhai, Andrew J. Poss, Rajiv R. Singh
  • Fluorosurfactants having improved biodegradability
    Patent number: 9126889
    Abstract: To address the problem of insufficient biodegradability of perfluorinated surfactants, the present invention provides biodegradable fluorosurfactants derived from olefins having —CHR, —CHRf, —CHF, and/or —CH2 groups, where R is an alkyl group and Rf is a perfluoro or fluroroalkyl group. Preferably, the —CHR, —CHRf, —CHF, and/or —CH2 groups are contained within partially fluorinated alkenes.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: September 8, 2015
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Haridasan K. Nair, Yian Zhai, Andrew J. Poss, Rajiv R. Singh, David Nalewajek
  • Process for 1-chloro-3,3,3-trifluoropropene from trifluoromethane
    Patent number: 9029616
    Abstract: The present invention provides routes for making 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) from commercially available raw materials. More specifically, this invention provides routes for HCFO-1233zd from inexpensive and commercially available trifluoromethane (HFC-23).
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: May 12, 2015
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, Andrew Joseph Poss, David Nalewajek, Yian Zhai
  • Process for 1-chloro-3,3,3-trifluoropropene from trifluoropropene
    Patent number: 9029617
    Abstract: The present invention provides routes for making 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) from commercially available raw materials. More specifically, this invention provides several routes for forming HCFO-1233zd from 3,3,3-trifluoropropene (FC-1234zf).
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: May 12, 2015
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, David Nalewajek, Andrew Joseph Poss, Yian Zhai
  • FLUOROSURFACTANTS HAVING IMPROVED BIODEGRADABILITY
    Publication number: 20150065746
    Abstract: To address the problem of insufficient biodegradability of perfluorinated surfactants, the present invention provides biodegradable fluorosurfactants derived from olefins having —CHR, —CHRf, —CHF, and/or —CH2 groups, where R is an alkyl group and Rf is a perfluoro or fluroroalkyl group. Preferably, the —CHR, —CHRf, —CHF, and/or —CH2 groups are contained within partially fluorinated alkenes.
    Type: Application
    Filed: August 14, 2014
    Publication date: March 5, 2015
    Inventors: Haridasan K. Nair, Yian Zhai, Andrew J. Poss, Rajiv R. Singh, David Nalewajek
  • PROCESS FOR 1-CHLORO-3,3,3-TRIFLUOROPROPENE FROM TRIFLUOROMETHANE
    Publication number: 20150045588
    Abstract: The present invention provides routes for making 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) from commercially available raw materials. More specifically, this invention provides routes for HCFO-1233zd from inexpensive and commercially available trifluoromethane (HFC-23).
    Type: Application
    Filed: July 14, 2014
    Publication date: February 12, 2015
    Inventors: Haridasan K. Nair, Andrew Joseph Poss, David Nalewajek, Yian Zhai
  • PROCESS FOR 1-CHLORO-3,3,3-TRIFLUOROPROPENE FROM TRIFLUOROPROPENE
    Publication number: 20150045590
    Abstract: The present invention provides routes for making 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) from commercially available raw materials. More specifically, this invention provides several routes for forming HCFO-1233zd from 3,3,3-trifluoropropene (FC-1234zf).
    Type: Application
    Filed: July 14, 2014
    Publication date: February 12, 2015
    Inventors: Haridasan K. Nair, David Nalewajek, Andrew Joseph Poss, Yian Zhai
  • DEHALOGENATION OF TRANS-1-CHLORO-3,3,3-TRIFLUOROPROPENE
    Publication number: 20140343330
    Abstract: The present invention is related to making hydrofluorocarbons (HCFCs), more specifically, 3,3,3-trifluoropropyne (TFP), from trans-1-chloro-3,3,3-trifluoropropene (trans-1233zd) by contacting the trans-1233zd with a base. Preferably, the base is potassium hydroxide or potassium tert-butoxide, which may or may not be dissolved in as solvent.
    Type: Application
    Filed: May 5, 2014
    Publication date: November 20, 2014
    Inventors: Yian Zhai, Andrew J. Poss, Rajiv R. Singh
  • Synthesis of 1-BROM0-3,3,3-trifluoropropene
    Patent number: 8877988
    Abstract: In accordance with the present invention, processes for producing bromofluoropropenes in commercial quantities by reacting 3,3,3-trifluoropropyne with hydrogen bromide at elevated temperatures are provided.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: November 4, 2014
    Assignee: Honeywell International Inc.
    Inventors: Yian Zhai, Andrew J. Poss, Rajiv R. Singh