Patents by Inventor Baiyi Zhao
Baiyi Zhao 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: 10947324Abstract: A flexible manufacturing system for selectively producing different alpha-olefins from ethylene includes: (a) a reaction section 18 with ethylene feed operative to oligomerize ethylene; (b) a catalyst feed system 12, 14, 16 comprising a plurality of independent homogeneous catalyst feeders connected with the reaction section for alternatively providing different selective homogeneous catalyst compositions to the reaction section; (c) an ethylene recycle column 22 coupled to the reaction section and adapted to receive crude product and unreacted ethylene therefrom, the recycle column being operative to separate ethylene and optionally lower oligomers from the crude product which are recycled to the ethylene feed to the reaction section, the ethylene recycle column being further operative to provide a crude product bottoms stream; (d) a catalyst removal section 20 coupled to the reaction section adapted to remove spent catalyst from the system; and (e) a first product separation column 24 connected to the recycType: GrantFiled: February 28, 2020Date of Patent: March 16, 2021Assignee: TPC Group LLCInventors: Michael O. Nutt, Baiyi Zhao
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Publication number: 20200291140Abstract: A flexible manufacturing system for selectively producing different alpha-olefins from ethylene includes: (a) a reaction section 18 with ethylene feed operative to oligomerize ethylene; (b) a catalyst feed system 12, 14, 16 comprising a plurality of independent homogeneous catalyst feeders connected with the reaction section for alternatively providing different selective homogeneous catalyst compositions to the reaction section; (c) an ethylene recycle column 22 coupled to the reaction section and adapted to receive crude product and unreacted ethylene therefrom, the recycle column being operative to separate ethylene and optionally lower oligomers from the crude product which are recycled to the ethylene feed to the reaction section, the ethylene recycle column being further operative to provide a crude product bottoms stream; (d) a catalyst removal section 20 coupled to the reaction section adapted to remove spent catalyst from the system; and (e) a first product separation column 24 connected to the recycType: ApplicationFiled: February 28, 2020Publication date: September 17, 2020Inventors: Michael O. Nutt, Baiyi Zhao
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Patent number: 8563794Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of extending the life of an aromatization catalyst comprising predicting a rapid deactivation threshold (RDT) for an aromatization reactor by employing the catalyst in a reactor system under an accelerated fouling condition to identify a test rapid deactivation threshold (t-RDT), predicting the RDT for the aromatization reactor based upon the t-RDT, and oxidizing the catalyst prior to the predicted RDT to extend the Time on Stream of the aromatization catalyst.Type: GrantFiled: September 13, 2012Date of Patent: October 22, 2013Assignee: Chevron Phillips Chemical Company LPInventors: Scott H. Brown, Tin-Tack Peter Cheung, Daniel P. Hagewiesche, Baiyi Zhao
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Patent number: 8461072Abstract: This invention relates to a series of novel late transition metal catalysts for olefin oligomerization, the catalysts demonstrating high activity and selectivity for linear ?-olefins. The catalysts contain a Group-8, -9, or -10 transition metal, M, excluding palladium; an ancillary ligand comprising: a terminal amine comprising two independently selected hydrocarbyl radicals, R1 and R2; a terminal phosphine comprising two independently selected hydrocarbyl radicals, R3 and R4; and a hydrocarbyl bridge, Y, comprising a backbone wherein the hydrocarbyl bridge connects between the terminal amine and the terminal phosphine and wherein the backbone comprises a chain that is four or more carbon atoms long; and an abstractable ligand, X. For example this invention relates to a composition of matter with the following formula: wherein M, R1, R2, R3, and R4, Y, and X are as defined above.Type: GrantFiled: October 24, 2003Date of Patent: June 11, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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Publication number: 20130066125Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of extending the life of an aromatization catalyst comprising predicting a rapid deactivation threshold (RDT) for an aromatization reactor by employing the catalyst in a reactor system under an accelerated fouling condition to identify a test rapid deactivation threshold (t-RDT), predicting the RDT for the aromatization reactor based upon the t-RDT, and oxidizing the catalyst prior to the predicted RDT to extend the Time on Stream of the aromatization catalyst.Type: ApplicationFiled: September 13, 2012Publication date: March 14, 2013Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Scott H. BROWN, Tin-Tack Peter CHEUNG, Daniel P. HAGEWIESCHE, Baiyi ZHAO
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Patent number: 8288603Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of characterizing an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst.Type: GrantFiled: December 7, 2010Date of Patent: October 16, 2012Assignee: Chevron Phillips Chemical Company LPInventors: Scott H. Brown, Tin-Tack Peter Cheung, Daniel P. Hagewiesche, Baiyi Zhao
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Patent number: 7994086Abstract: A series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalysts demonstrate high activity and selectivity for linear ?-olefins.Type: GrantFiled: November 29, 2010Date of Patent: August 9, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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Publication number: 20110190558Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of characterizing an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst.Type: ApplicationFiled: December 7, 2010Publication date: August 4, 2011Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Scott H. BROWN, Tin-Tack Peter CHEUNG, Daniel P. HAGEWIESCHE, Baiyi ZHAO
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Publication number: 20110092658Abstract: A series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalysts demonstrate high activity and selectivity for linear ?-olefins.Type: ApplicationFiled: November 29, 2010Publication date: April 21, 2011Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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Patent number: 7871953Abstract: As series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalyst system includes a Group 8, 9 or 10 transition metal and an activator. The catalysts demonstrate high activity and selectivity for linear ?-olefins. Preferably this invention relates to a catalyst system comprising the reaction product of: (a) an activator selected from the group consisting of alumoxane, aluminum alkyl, alkyl aluminum halide, alkylaluminum alkoxide, discrete ionic activator, and Lewis acid; and (b) a catalyst precursor wherein the catalyst precursor has the following formula: wherein (i) M is a Group-8, -9 , or -10 transition metal; (ii) N is nitrogen (iii) P is phosphorus; (iv) R1, R2, R3, and R4 are independently hydrocarbyl radicals; (v) Y is a hydrocarbyl bridge comprising a backbone wherein the backbone comprises a chain that is four or more carbon atoms long; (vi) X are independently abstractable ligands.Type: GrantFiled: October 24, 2003Date of Patent: January 18, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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Patent number: 7868217Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of characterizing an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst.Type: GrantFiled: November 14, 2007Date of Patent: January 11, 2011Assignee: Chevron Phillips Chemical Company LPInventors: Scott H. Brown, Tin-Tack Peter Cheung, Daniel P. Hagewiesche, Baiyi Zhao
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Publication number: 20090124840Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of characterizing an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst.Type: ApplicationFiled: November 14, 2007Publication date: May 14, 2009Applicant: Chevron Phillips Chemical Company LPInventors: Scott H. Brown, Tin-Tack Peter Cheung, Daniel P. Hagewiesche, Baiyi Zhao
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Patent number: 7429548Abstract: A This invention relates to a composition comprising a catecholate ligand, palladium or nickel, and an ancillary ligand with the following structure: where Pn is a Group-15 element; H is hydrogen; R7 and R8 are independently hydrogen or C1-C30 hydrocarbyl radicals, or both are C1-C30 hydrocarbyl radicals that form a ring structure comprising one or more aromatic or non-aromatic rings; and R13-R18 are, independently, hydrogen or C1-C30 hydrocarbyl radicals. The composition can be used to oligomerize ethylene.Type: GrantFiled: August 16, 2005Date of Patent: September 30, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Enock Berluche, Smita Kacker, Jo Ann Marie Canich
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Patent number: 7247687Abstract: This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.Type: GrantFiled: July 17, 2003Date of Patent: July 24, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Vladimir Kuzunich Cherkasov, Michael Paviovich Bubnov, Nikolay Olegovich Druzhkov, Valentina Nikolavena Glushakova, Irina Alexandrovna Teplova, Nina Aleksandrovna Skorodumova, Gleb Arsent′evich Abakumov, Cynthia A. Ballinger, Kevin R. Squire, Jo Ann Marie Canich, Enock Berluche, Lisa Saunders Baugh, Donald Norman Schulz, Baiyi Zhao
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Patent number: 7160834Abstract: This invention relates to late transition metal catalyst precursors and catalysts for olefin dimerizations and oligomerizations, and to methods for making and using these catalysts.Type: GrantFiled: March 18, 2003Date of Patent: January 9, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Kevin R. Squire, Smita Kacker, Jo Ann Marie Canich
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Patent number: 7161018Abstract: A series of soluble ?-diimine late transition metal catalysts has been invented. The catalysts demonstrate high activity and selectivity for linear ?-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalyst. These catalysts can be used in a supported or unsupported form.Type: GrantFiled: May 30, 2003Date of Patent: January 9, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Enock Berluche, Smita Kacker, Jo Ann Marie Canich
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Patent number: 7067450Abstract: A series of soluble ?-diimine late transition metal catalysts has been invented comprising a substituted or unsubstituted catecholate ligand. The catalysts demonstrate high activity and selectivity for linear ?-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalysts. These catalysts can be used in a supported or unsupported form.Type: GrantFiled: May 30, 2003Date of Patent: June 27, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Enock Berluche, Smita Kacker, Jo Ann Marie Canich
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Publication number: 20060047094Abstract: This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.Type: ApplicationFiled: July 17, 2003Publication date: March 2, 2006Inventors: Vladimir Cherkasov, Michael Bubnov, Nikolay Druzhkov, Valentina Glushakova, Irina Teplova, Nina Skorodumova, Gleb Abakumov, Cynthia Ballinger, Kevin Squire, Jo Ann Canich, Enock Berluche, Lisa Baugh, Donald Schulz, Baiyi Zhao
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Publication number: 20060036049Abstract: A series of soluble ?-diimine late transition metal catalysts has been invented comprising a substituted or unsubstituted catecholate ligand. The catalysts demonstrate high activity and selectivity for linear ?-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalysts. These catalysts can be used in a supported or unsupported form.Type: ApplicationFiled: August 16, 2005Publication date: February 16, 2006Inventors: Baiyi Zhao, Enock Berluche, Smita Kacker, Jo Ann Canich
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Publication number: 20050003955Abstract: A series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalysts demonstrate high activity and selectivity for linear ?-olefins.Type: ApplicationFiled: October 24, 2003Publication date: January 6, 2005Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Canich