Patents Assigned to Graymont (PA) Inc.
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Patent number: 11883776Abstract: Several embodiments of the present technology are directed to the removal of one or more air pollutants using cooling and/or calcium-containing particles. In some embodiments, a method for removing air pollutants comprises flowing a gas stream having calcium-containing particles and one or more of mercury or hydrochloric acid molecules, and cooling the gas stream, thereby causing at least a portion of the calcium-containing particles to adsorb to the mercury and/or hydrochloric acid molecules in the gas stream. The method can further comprise, after cooling the gas stream, filtering the gas stream to remove at least a portion of the calcium-containing particles having adsorbed mercury and hydrochloric acid.Type: GrantFiled: December 21, 2020Date of Patent: January 30, 2024Assignee: Graymont (PA) Inc.Inventors: Harold Wayne Lee, II, Laura L. Kinner, Douglas C. Murdock, Fred Douglas Blackham, John B. Heintzelman
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Patent number: 11344844Abstract: Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide-containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D10 from about 0.5 microns to about 4 microns, a D90 less than about 30 microns, and a ratio of D90 to D10 less than 20, wherein individual particles include a surface area greater than or equal to about 25 m2/g.Type: GrantFiled: November 23, 2020Date of Patent: May 31, 2022Assignee: Graymont (PA) Inc.Inventors: Michael John Tate, Jared Ira Leikam, Michael Roach, Joseph Lewis, Shiaw Tseng
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Patent number: 10898851Abstract: Several embodiments of the present technology are directed to the removal of one or more air pollutants using cooling and/or calcium-containing particles. In some embodiments, a method for removing air pollutants comprises flowing a gas stream having calcium-containing particles and one or more of mercury or hydrochloric acid molecules, and cooling the gas stream, thereby causing at least a portion of the calcium-containing particles to adsorb to the mercury and/or hydrochloric acid molecules in the gas stream. The method can further comprise, after cooling the gas stream, filtering the gas stream to remove at least a portion of the calcium-containing particles having adsorbed mercury and hydrochloric acid.Type: GrantFiled: July 6, 2018Date of Patent: January 26, 2021Assignee: Graymont (PA) Inc.Inventors: Harold Wayne Lee, II, Laura L. Kinner, Douglas C. Murdock, Fred Douglas Blackham, John B. Heintzelman
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Patent number: 10894730Abstract: Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.Type: GrantFiled: September 10, 2019Date of Patent: January 19, 2021Assignee: GRAYMONT (PA) INC.Inventors: Jared Ira Leikam, Nikolas Andrei Romaniuk, Jesse Wayne Fox, Michael John Tate, Narain Hariharan
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Patent number: 10874982Abstract: Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide-containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D10 from about 0.5 microns to about 4 microns, a D90 less than about 30 microns, and a ratio of D90 to D10 from about 8 to about 20, wherein individual particles include a surface area greater than or equal to about 25 m2/g.Type: GrantFiled: February 25, 2020Date of Patent: December 29, 2020Assignee: GRAYMONT (PA) INC.Inventors: Michael John Tate, Jared Ira Leikam, Michael Roach, Joseph Lewis, Shiaw Tseng
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Patent number: 10870585Abstract: Methods and systems for producing calcium carbonate from calcium hydroxide and carbon dioxide are disclosed herein. In some embodiments, a method for producing calcium carbonate comprises (i) providing a first plurality of particles comprising solid-state calcium hydroxide, and (ii) introducing a gas stream comprising carbon dioxide to the first plurality of particles to produce a second plurality of particles comprising calcium carbonate. Individual ones of the first plurality of particles can include a specific surface area of at least 20 m2/g and a free moisture content of from 2% to 20%. The second plurality of particles comprising calcium carbonate are not produced via precipitation.Type: GrantFiled: September 17, 2019Date of Patent: December 22, 2020Assignee: GRAYMONT (PA) INC.Inventors: Brent LaMar, Jared Ira Leikam, Joseph Lewis
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Patent number: 10610825Abstract: Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide-containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D10 from about 0.5 microns to about 4 microns, a D90 less than about 30 microns, and a ratio of D90 to D10 from about 8 to about 20, wherein individual particles include a surface area greater than or equal to about 25 m2/g.Type: GrantFiled: June 20, 2019Date of Patent: April 7, 2020Assignee: Graymont (PA) Inc.Inventors: Michael John Tate, Jared Ira Leikam, Michael Roach, Joseph Lewis, Shiaw Tseng
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Patent number: 10369518Abstract: Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide-containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D10 from about 0.5 microns to about 4 microns, a D90 less than about 30 microns, and a ratio of D90 to D10 from about 8 to about 20, wherein individual particles include a surface area greater than or equal to about 25 m2/g.Type: GrantFiled: March 15, 2018Date of Patent: August 6, 2019Assignee: Graymont (PA) Inc.Inventors: Michael John Tate, Jared Ira Leikam, Michael Roach, Joseph Lewis, Shiaw Tseng