Patents by Inventor Haunn-Lin Tony Chen
Haunn-Lin Tony Chen 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: 11046794Abstract: Silicon containing polyamine scale inhibitors derived from poly(primary amine)s are disclosed. The scale inhibitors can be used to reduce siliceous scale formation in industrial process streams such as alumina recovery process streams, nuclear waste streams and kraft paper mill effluent streams.Type: GrantFiled: December 15, 2015Date of Patent: June 29, 2021Assignee: Cytec Industries Inc.Inventors: Airong Song, Lei Zhang, Douglas Cywar, Haunn-Lin Tony Chen, Matthew Taylor
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Patent number: 11007538Abstract: Methods of enhancing recovery of value sulfide and/or precious metal-bearing minerals from an ore containing such minerals as well as Mg-silicate, slime forming minerals, and/or clay by adding a froth phase modifier agent to the ore, and subjecting the ore to a froth flotation process performed under acidic conditions, are provided herein.Type: GrantFiled: May 26, 2016Date of Patent: May 18, 2021Assignee: Cytec Technology Corp.Inventors: Devarayasamudram Ramachandran Nagaraj, Tarun Bhambhani, Mukund Vasudevan, Puspendu Deo, Haunn-Lin Tony Chen
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Patent number: 10214421Abstract: Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale-inhibiting amount of a reagent having a primary amine-containing polymer to at least one stage of a wet process phosphoric acid production process are provided herein, wherein said primary amine-containing polymer includes one or more organic moieties that reduce the polymer's solubility in an aqueous environment as compared to its native form, thereby reducing or preventing scale in the wet process phosphoric acid production process.Type: GrantFiled: January 12, 2018Date of Patent: February 26, 2019Assignee: Cytec Industries Inc.Inventors: Lei Zhang, John Carr, Haunn-Lin Tony Chen
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Patent number: 10130956Abstract: Methods of enhancing recovery of value sulfide and/or precious-metal minerals from an ore containing said minerals and a Mg-silicate, slime forming mineral, and/or clay, and which is subjected to a froth flotation process, by adding to one or more stage of the froth flotation process a froth phase modifier having a polymer containing one or more functional groups, and optionally a monovalent ion modifier enhancing agent, thereby enhancing recovery of a value sulfide mineral and/or a precious metal-bearing mineral.Type: GrantFiled: April 18, 2014Date of Patent: November 20, 2018Assignee: Cytec Technology Corp.Inventors: Devarayasamudram Ramachandran Nagaraj, Tarun Bhambhani, Mukund Vasudevan, Puspendu Deo, Haunn-Lin Tony Chen
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Publication number: 20180179062Abstract: Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale-inhibiting amount of a reagent having a primary amine-containing polymer to at least one stage of a wet process phosphoric acid production process are provided herein, wherein said primary amine-containing polymer includes one or more organic moieties that reduce the polymer's solubility in an aqueous environment as compared to its native form, thereby reducing or preventing scale in the wet process phosphoric acid production process.Type: ApplicationFiled: January 12, 2018Publication date: June 28, 2018Inventors: Lei ZHANG, John CARR, Haunn-Lin Tony CHEN
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Patent number: 9902617Abstract: Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale-inhibiting amount of a reagent having a primary amine-containing polymer, or salt thereof, to one or more stages of a wet process phosphoric acid production stream are provided herein, wherein the primary amine-containing polymer includes an A mer according to Formula (I): where R is H, C1-C6 alkyl, C2-C6 alkenyl, halide, or carboxyl; R1 is H, C1-C6 alkyl, or C2-C6 alkenyl; R2 is H or an A mer according to Formula (I) as herein defined; R3 is chosen from a direct bond or a C1-C12 alkyl, C2-C12 alkenyl, or a C6-C12 aryl group; and n is an integer chosen to provide a weight average molecular weight of the primary amine-containing polymer of at least 300 Daltons, and wherein the percentage of primary amines in the polymer is from 30 mole % to 100 mole % based on the total percentage of mer units in the polymer.Type: GrantFiled: February 11, 2015Date of Patent: February 27, 2018Assignee: Cytec Industries Inc.Inventors: Lei Zhang, John Carr, Haunn-Lin Tony Chen
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Publication number: 20170225962Abstract: Disclosed herein is a method of producing alumina trihydrate crystals from an alumina trihydrate recovery process stream wherein an aqueous emulsion comprising an alkyl or alkenyl succinic anhydride is added to the alumina trihydrate recovery process stream, wherein the aqueous emulsion is substantially free of mineral oils. The method provides a decrease in percentage of alumina trihydrate crystals having a volume average diameter of less than about 45 micrometers compared to the percentage of alumina trihydrate crystals produced in the absence of the aqueous emulsion of an alkyl or alkenyl succinic anhydride.Type: ApplicationFiled: March 9, 2016Publication date: August 10, 2017Inventors: Krzysztof ANDRUSZKIEWICZ, Raymond Salvatore FARINATO, Haunn-Lin Tony CHEN, Scott GRIFFIN, Marie E. Anderson
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Patent number: 9718699Abstract: Disclosed herein is a method of producing alumina trihydrate crystals from an alumina trihydrate recovery process stream wherein an aqueous emulsion comprising an alkyl or alkenyl succinic anhydride is added to the alumina trihydrate recovery process stream, wherein the aqueous emulsion is substantially free of mineral oils. The method provides a decrease in percentage of alumina trihydrate crystals having a volume average diameter of less than about 45 micrometers compared to the percentage of alumina trihydrate crystals produced in the absence of the aqueous emulsion of an alkyl or alkenyl succinic anhydride.Type: GrantFiled: March 9, 2016Date of Patent: August 1, 2017Assignee: Cytec Industries Inc.Inventors: Krzysztof Andruszkiewicz, Raymond Salvatore Farinato, Haunn-Lin Tony Chen, Scott Griffin, Marie E Anderson
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Publication number: 20160271624Abstract: Methods of enhancing recovery of value sulfide or precious minerals from an ore containing Mg-silicate, slime forming minerals, and/or clay by subjecting the ore to a flotation process performed under acidic conditions, in conjunction with the addition of a froth phase modifier agent to the ore, are provided herein.Type: ApplicationFiled: May 26, 2016Publication date: September 22, 2016Applicant: Cytec Technology Corp.Inventors: Devarayasamudram Ramachandran NAGARAJ, Tarun BHAMBHANI, Mukund VASUDEVAN, Puspendu DEO, Haunn-Lin Tony CHEN
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Publication number: 20160185613Abstract: The suspended solids content of a process stream in a process for producing alumina is reduced by contacting the stream with silicon-containing polymers provided by water-in-oil compositions.Type: ApplicationFiled: February 7, 2011Publication date: June 30, 2016Applicant: CYTEC TECHNOLOGY CORP.Inventors: Haunn-Lin Tony Chen, Douglas A. Cywar, Matthew J. Davis, Morris Lewellyn
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Publication number: 20160176995Abstract: Silicon containing polyamine scale inhibitors derived from poly(primary amine)s are disclosed. The scale inhibitors can be used to reduce siliceous scale formation in industrial process streams such as alumina recovery process streams, nuclear waste streams and kraft paper mill effluent streams.Type: ApplicationFiled: December 15, 2015Publication date: June 23, 2016Applicant: Cytec Industries IncInventors: Airong Song, Lei Zhang, Douglas Cywar, Haunn-Lin Tony Chen, Matthew Taylor
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Publication number: 20150225241Abstract: Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale-inhibiting amount of a reagent having a primary amine-containing polymer, or salt thereof, to one or more stages of a wet process phosphoric acid production stream are provided herein, wherein the primary amine-containing polymer includes an A mer according to Formula (I): where R is H, C1-C6 alkyl, C2-C6 alkenyl, halide, or carboxyl; R1 is H, C1-C6 alkyl, or C2-C6 alkenyl; R2 is H or an A mer according to Formula (I) as herein defined; R3 is chosen from a direct bond or a C1-C12 alkyl, C2-C12 alkenyl, or a C6-C12 aryl group; and n is an integer chosen to provide a weight average molecular weight of the primary amine-containing polymer of at least 300 Daltons, and wherein the percentage of primary amines in the polymer is from 30 mole % to 100 mole % based on the total percentage of mer units in the polymer.Type: ApplicationFiled: February 11, 2015Publication date: August 13, 2015Inventors: Lei ZHANG, John CARR, Haunn-Lin Tony CHEN
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Publication number: 20140314641Abstract: Methods of enhancing recovery of value sulfide and/or precious-metal minerals from an ore containing said minerals and a Mg-silicate, slime forming mineral, and/or clay, and which is subjected to a froth flotation process, by adding to one or more stage of the froth flotation process a froth phase modifier having a polymer containing one or more functional groups, and optionally a monovalent ion modifier enhancing agent, thereby enhancing recovery of a value sulfide mineral and/or a precious metal-bearing mineral.Type: ApplicationFiled: April 18, 2014Publication date: October 23, 2014Applicant: CYTEC TECHNOLOGY CORP.Inventors: Devarayasamudram Ramachandran NAGARAJ, Tarun BHAMBHANI, Mukund VASUDEVAN, Puspendu DEO, Haunn-Lin Tony CHEN
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Patent number: 8720694Abstract: Methods of enhancing recovery of value sulfide or precious minerals from an ore containing Mg-silicate, slime forming minerals, and/or clay by crushing the ore, grinding the ore, and subjecting the ground ore to a flotation process, in conjunction with the addition of at least one monovalent ion modifier enhancing agent and/or froth phase modifier agent to the ore, are provided herein.Type: GrantFiled: July 16, 2009Date of Patent: May 13, 2014Assignee: Cytec Technology Corp.Inventors: Devarayasamudram Ramachandran Nagaraj, Tarun Bhambhani, Mukund Vasudevan, Puspendu Deo, Haunn-Lin Tony Chen
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Patent number: 8703088Abstract: The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.Type: GrantFiled: July 29, 2013Date of Patent: April 22, 2014Assignee: Cytec Technology Corp.Inventors: Morris Lewellyn, Alan S. Rothenberg, Haunn-Lin Tony Chen, Lino G. Magliocco, Thomas P. Sassi
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Patent number: 8685256Abstract: Methods of producing microdispersions containing hydroxamated polymers by reacting water-in-oil microdispersions having vinyl polymers containing one or more pendant functional groups that react with hydroxylamine, with a hydroxylamine-free base substantially free of inorganic salt and containing less than 500 ppm hydrazine are disclosed herein, along with the microdispersions thereby obtained.Type: GrantFiled: December 19, 2011Date of Patent: April 1, 2014Assignee: Cytec Technology Corp.Inventors: Morris Lewellyn, Alan S. Rothenberg, Haunn-Lin Tony Chen, Lino G. Magliocco, Thomas P. Sassi
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Publication number: 20130315812Abstract: The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.Type: ApplicationFiled: July 29, 2013Publication date: November 28, 2013Applicant: CYTEC TECHNOLOGY CORP.Inventors: Morris LEWELLYN, Alan S. ROTHENBERG, Haunn-Lin Tony CHEN, Lino G. MAGLIOCCO, Thomas P. SASSI
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Publication number: 20130048571Abstract: A flocculant composition that includes a blend of a first water-in-oil emulsion having a silicon-containing polymer in its aqueous phase and a second water-in-oil emulsion having an anionic polymer in its aqueous phase. The silicon-containing polymer and the anionic polymer are present in the composition at a weight ratio between 100:1 and 1:100.Type: ApplicationFiled: February 7, 2011Publication date: February 28, 2013Applicant: CYTEC TECHNOLOGY CORP.Inventors: Haunn-Lin Tony Chen, Douglas A. Cywar, Matthew J. Davis, Morris Lewellyn
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Publication number: 20120152852Abstract: The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.Type: ApplicationFiled: December 19, 2011Publication date: June 21, 2012Applicant: CYTEC TECHNOLOGY CORP.Inventors: Morris LEWELLYN, Alan S. ROTHENBERG, Haunn-Lin Tony CHEN, Lino G. MAGLIOCCO, Thomas P. SASSI
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Publication number: 20120153209Abstract: Methods of producing microdispersions containing hydroxamated polymers by reacting water-in-oil microdispersions having vinyl polymers containing one or more pendant functional groups that react with hydroxylamine, with a hydroxylamine-free base substantially free of inorganic salt and containing less than 500 ppm hydrazine are disclosed herein, along with the microdispersions thereby obtained.Type: ApplicationFiled: December 19, 2011Publication date: June 21, 2012Applicant: CYTEC TECHNOLOGY CORP.Inventors: Morris LEWELLYN, Alan S. ROTHENBERG, Haunn-Lin Tony CHEN, Lino G. MAGLIOCCO, Thomas P. SASSI