Patents by Inventor Dmitri L. Kouznetsov
Dmitri L. Kouznetsov 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: 9149814Abstract: The invention provides methods and compositions for improving a froth flotation type separation. The method involves adding a hydrocarbon reaction product to slurry to enhance the separation. The method is particularly effective with coal separation because it increases yield without increasing ash content of flotation concentrate.Type: GrantFiled: March 13, 2013Date of Patent: October 6, 2015Assignee: ECOLAB USA INC.Inventor: Dmitri L. Kouznetsov
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Patent number: 9128010Abstract: Methods for monitoring scale deposition in a water-containing industrial process are disclosed. In certain embodiments, the water-containing industrial process is an aqueous cooling system. In certain embodiments, the methods incorporate fluorometric monitoring and control techniques along with a piezoelectric microbalance sensor. A particular embodiment of a piezoelectric microbalance sensor is additionally disclosed, along with at least one method for using the particular embodiment that is independent of whether fluorometric monitoring and control techniques are utilized.Type: GrantFiled: March 14, 2013Date of Patent: September 8, 2015Assignee: Ecolab USA Inc.Inventors: Arthur J Kahaian, Dmitri L Kouznetsov, John E Hoots, Rodney H Banks, David Ambrose
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Patent number: 8945371Abstract: Methods for monitoring scale deposition in a water-containing industrial process are disclosed. In certain embodiments, the water-containing industrial process is an aqueous cooling system. In certain embodiments, the methods incorporate fluorometric monitoring and control techniques along with a piezoelectric microbalance sensor. A particular embodiment of a piezoelectric microbalance sensor is additionally disclosed, along with at least one method for using the particular embodiment that is independent of whether fluorometric monitoring and control techniques are utilized.Type: GrantFiled: March 14, 2013Date of Patent: February 3, 2015Assignee: Ecolab USA Inc.Inventors: Dmitri L Kouznetsov, John E Hoots, Arthur J Kahaian, Rodney H Banks, David Ambrose
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Patent number: 8926939Abstract: The invention provides methods and compositions for the addition of a CGM to precipitation liquor of a Bayer process. The CGM comprises a neopolyol, an ester derived from a neopolyol, and/or an ether derived from a neopolyol. Optionally the CGM may comprise water and/or an antifoaming agent and/or a hydrocarbon carrier liquid. The CGM is quite effective and results in a significant increase in mean particle size of produced alumina crystals.Type: GrantFiled: March 13, 2013Date of Patent: January 6, 2015Assignee: Ecolab USA Inc.Inventors: Dmitri L. Kouznetsov, Jianjun Liu, David H. Slinkman
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Patent number: 8925730Abstract: Methods and compositions for separating materials are provided. In an embodiment, the present invention provides a method of separating a first material from a second material. For example, the method can comprise mixing the first material and the second material in a slurry with a beneficiation composition. The beneficiation composition can comprise one or more fatty acid by-products derived from a biodiesel manufacturing process. Air bubbles can be provided in the slurry to form bubble-particle aggregates with the first material and the bubble-particle aggregates can be allowed to be separated from the second material.Type: GrantFiled: June 17, 2010Date of Patent: January 6, 2015Assignee: Nalco CompanyInventors: Bo L. Tran, Dmitri L. Kouznetsov
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Publication number: 20140262202Abstract: Methods for monitoring scale deposition in a water-containing industrial process are disclosed. In certain embodiments, the water-containing industrial process is an aqueous cooling system. In certain embodiments, the methods incorporate fluorometric monitoring and control techniques along with a piezoelectric microbalance sensor. A particular embodiment of a piezoelectric microbalance sensor is additionally disclosed, along with at least one method for using the particular embodiment that is independent of whether fluorometric monitoring and control techniques are utilized.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: ECOLAB USA INC.Inventors: Dmitri L. Kouznetsov, John E. Hoots, Arthur J. Kahaian, Rodney H. Banks, David Ambrose
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Publication number: 20140271416Abstract: The invention provides methods and compositions for the addition of a CGM to precipitation liquor of a Bayer process. The CGM comprises a neopolyol, an ester derived from a neopolyol, and/or an ether derived from a neopolyol. Optionally the CGM may comprise water and/or an antifoaming agent and/or a hydrocarbon carrier liquid. The CGM is quite effective and results in a significant increase in mean particle size of produced alumina crystals.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: Ecolab USA Inc.Inventors: Dmitri L. Kouznetsov, Jianjun Liu, David H. Slinkman
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Publication number: 20140260566Abstract: Methods for monitoring scale deposition in a water-containing industrial process are disclosed. In certain embodiments, the water-containing industrial process is an aqueous cooling system. In certain embodiments, the methods incorporate fluorometric monitoring and control techniques along with a piezoelectric microbalance sensor. A particular embodiment of a piezoelectric microbalance sensor is additionally disclosed, along with at least one method for using the particular embodiment that is independent of whether fluorometric monitoring and control techniques are utilized.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: ECOLAB USA INC.Inventors: Arthur J Kahaian, Dmitri L Kouznetsov, John E Hoots, Rodney H Banks, David Ambrose
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Publication number: 20140262974Abstract: The invention provides methods and compositions for improving a froth flotation type separation. The method involves adding a hydrocarbon reaction product to slurry to enhance the separation. The method is particularly effective with coal separation because it increases yield without increasing ash content of flotation concentrate.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Inventor: Dmitri L. Kouznetsov
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Patent number: 8303768Abstract: A method of monitoring and inhibiting scale precipitation and deposition from spent liquor in pulp mill evaporators and concentrators is disclosed. The method includes connecting a black liquor deposition monitor to a pulp mill evaporator or concentrator and measuring the thermal conductivity on the outer surface of the monitor. A controller interprets the measured thermal conductivity and determines a level of scale deposition. If the level of scale deposition is above a predetermined level, the controller is operable to introduce a scale-inhibiting composition to the spent liquor. The scale-inhibiting composition may include organic polycarboxylic acids; organic fatty acids; low molecular weight and polymeric aromatic acids; organic acid esters, anhydrides, and amides; low molecular weight and polymeric aliphatic and aromatic sulfonic acids; and low molecular weight and polymeric amines; and any combinations.Type: GrantFiled: July 25, 2011Date of Patent: November 6, 2012Assignee: Nalco CompanyInventors: Sergey M. Shevchenko, Prasad Y. Duggirata, Dmitri L. Kouznetsov
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Patent number: 8282689Abstract: The present invention relates ways to increase the output of a high quality product from the precipitation liquor crystallization process exemplified through the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated of a liquor. The invention in one embodiment relates to the use of a crystal growth modifier compositions added to the precipitation process to increase the particle size distribution of the precipitated alumina trihydrate.Type: GrantFiled: July 1, 2009Date of Patent: October 9, 2012Assignee: Nalco CompanyInventors: Dmitri L. Kouznetsov, Jianjun Liu, Kim Richard Coleman, Ryan Travis Chester, John David Kildea
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Patent number: 8163059Abstract: A coating oil composition and methods of using the composition for dust control is provided. The coating oil comprises utilizing a by-product from the manufacture of biodiesel and/or fatty alkyl esters, wherein the by-product comprises C6-C24 saturated and unsaturated fatty acids, C6-C24 saturated and unsaturated fatty acid salts, methyl esters, ethyl esters and combinations thereof.Type: GrantFiled: February 12, 2007Date of Patent: April 24, 2012Assignee: Nalco CompanyInventors: Bo L. Tran, Theodore C. Arnst, Patrick C. Miller, Dmitri L. Kouznetsov
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Publication number: 20110200503Abstract: An improved method and composition for producing aluminum hydroxide crystals from precipitation liquor, involves the addition of an emulsified crystal growth modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The emulsified crystal growth modifier also facilitates an upward shift in particle size distribution of aluminum hydroxide and an upward shift in oxalate ball size.Type: ApplicationFiled: April 28, 2011Publication date: August 18, 2011Inventors: Jianjun Liu, James A. Counter, Dmitri L. Kouznetsov, David H. Slinkman
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Patent number: 7985318Abstract: A method of monitoring and inhibiting scale precipitation and deposition from spent liquor in pulp mill evaporators and concentrators is disclosed. The method includes connecting a black liquor deposition monitor to a pulp mill evaporator or concentrator and measuring the thermal conductivity on the outer surface of the monitor. A controller interprets the measured thermal conductivity and determines a level of scale deposition. If the level of scale deposition is above a predetermined level, the controller is operable to introduce a scale-inhibiting composition to the spent liquor. The scale-inhibiting composition may include organic polycarboxylic acids; organic fatty acids; low molecular weight and polymeric aromatic acids; organic acid esters, anhydrides, and amides; low molecular weight and polymeric aliphatic and aromatic sulfonic acids; and low molecular weight and polymeric amines; and any combinations.Type: GrantFiled: May 10, 2007Date of Patent: July 26, 2011Assignee: Nalco CompanyInventors: Sergey M. Shevchenko, Prasad Y. Duggirala, Dmitri L. Kouznetsov
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Patent number: 7976820Abstract: An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of an emulsified crystallization modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially viable product in the presence and absence of a hydrocarbon oil which dissolves the fatty acid. Further, the modifier, prepared in either an emulsified form or as a fatty acid neat, facilitates formation of oxalate aggregates greater than 200 ?m which may be readily screened out with minimum trihydrate loss.Type: GrantFiled: May 15, 2006Date of Patent: July 12, 2011Assignee: Nalco CompanyInventors: Jianjun Liu, James A Counter, Dmitri L Kouznetsov, David H Slinkman
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Patent number: 7976821Abstract: An improved method and composition for producing aluminum hydroxide crystals from precipitation liquor, involves the addition of an emulsified crystal growth modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The emulsified crystal growth modifier also facilitates an upward shift in particle size distribution of aluminum hydroxide and an upward shift in oxalate ball size.Type: GrantFiled: December 18, 2006Date of Patent: July 12, 2011Assignee: Nalco CompanyInventors: Jianjun Liu, James A Counter, Dmitri L Kouznetsov, David H Slinkman
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Patent number: 7942270Abstract: Methods and compositions for separating materials are provided. In an embodiment, the present invention provides a method of separating a first material from a second material. For example, the method can comprise mixing the first material and the second material in a slurry with a beneficiation composition. The beneficiation composition can comprise one or more fatty acid by-products derived from a biodiesel manufacturing process. Air bubbles can be provided in the slurry to form bubble-particle aggregates with the first material and the bubble-particle aggregates can be allowed to be separated from the second material.Type: GrantFiled: February 16, 2006Date of Patent: May 17, 2011Assignee: Nalco CompanyInventors: Bo L. Tran, Dmitri L. Kouznetsov
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Publication number: 20110002824Abstract: The present invention relates ways to increase the output of a high quality product from the precipitation liquor crystallization process exemplified through the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated of a liquor. The invention in one embodiment relates to the use of a crystal growth modifier compositions added to the precipitation process to increase the particle size distribution of the precipitated alumina trihydrate.Type: ApplicationFiled: July 1, 2009Publication date: January 6, 2011Inventors: Dmitri L. Kouznetsov, Jianjun Liu, Kir Richard Coleman, Ryan Travis Chester, John David Kildea
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Patent number: 7837891Abstract: Methods and compositions for separating materials are provided. In an embodiment, the present invention provides a method of separating a first material from a second material. For example, the method can comprise mixing the first material and the second material in a slurry with a beneficiation composition. The beneficiation composition can comprise one or more fatty acid by-products derived from a biodiesel manufacturing process or derived from transesterification reactions involving triglycerides. Air bubbles can be provided in the slurry to form bubble-particle aggregates with the first material and the bubble-particle aggregates can be separated from the second material.Type: GrantFiled: December 14, 2007Date of Patent: November 23, 2010Assignee: Nalco CompanyInventors: Bo L. Tran, Dmitri L. Kouznetsov
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Patent number: 7771681Abstract: The present invention relates ways to increase the output of a high quality product from the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated aluminum hydroxide while not reducing the total production amounts. The invention relates to the use of a crystal growth modifier compositions added to the precipitation liquor to increase the particle size distribution of the precipitated alumina trihydrate.Type: GrantFiled: December 29, 2006Date of Patent: August 10, 2010Assignee: Nalco CompanyInventors: Dmitri L. Kouznetsov, Jianjun Liu, David H. Slinkman