Patents by Inventor Randy J. Griffard
Randy J. Griffard 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: 11865583Abstract: Systems and methods to effectively sort calcined lime (quicklime) particles to produce products with more consistent size and burn time characteristics after the quicklime particles have been created and without the use of specialized additives. Specifically, such systems and methods sort the quicklime particles below a selected size into a softer burned and harder burned fraction based on their size. The fractions are burned in the kiln together and as a singular product, but can be classified from each other after calcining.Type: GrantFiled: April 8, 2019Date of Patent: January 9, 2024Assignee: Mississippi Lime CompanyInventors: Mark DeGenova, Randy J. Griffard, David Venhaus
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Patent number: 11673115Abstract: A hydrated lime product exhibiting superior reactivity towards HCl and SO2 in air pollution control applications. Also disclosed is a method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles. The resultant lime hydrate product has available CaOH of greater than 92%, a citric acid reactivity of less than 20 seconds, a BET surface area greater than 18, a D90 less than 10 ?m, a D50 less than 4 ?m, a D90/D50 less than 3, and a large pore volume of greater than 0.2 BJH.Type: GrantFiled: March 22, 2021Date of Patent: June 13, 2023Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Patent number: 11572306Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.Type: GrantFiled: June 18, 2020Date of Patent: February 7, 2023Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Publication number: 20210205778Abstract: A hydrated lime product exhibiting superior reactivity towards HCl and SO2 in air pollution control applications. Also disclosed is a method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles. The resultant lime hydrate product has available CaOH of greater than 92%, a citric acid reactivity of less than 20 seconds, a BET surface area greater than 18, a D90 less than 10 ?m, a D50 less than 4 ?m, a D90/D50 less than 3, and a large pore volume of greater than 0.2 BJH.Type: ApplicationFiled: March 22, 2021Publication date: July 8, 2021Inventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Paul J. Ramer
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Patent number: 10960379Abstract: A hydrated lime product exhibiting superior reactivity towards HCl and SO2 in air pollution control applications. Also disclosed is a method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles. The resultant lime hydrate product has available CaOH of greater than 92%, a citric acid reactivity of less than 20 seconds, a BET surface area greater than 18, a D90 less than 10 ?m, a D50 less than 4 ?m, a D90/D50 less than 3, and a large pore volume of greater than 0.2 BJH.Type: GrantFiled: December 27, 2019Date of Patent: March 30, 2021Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Publication number: 20200325068Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.Type: ApplicationFiled: June 18, 2020Publication date: October 15, 2020Inventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Patent number: 10723654Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.Type: GrantFiled: October 2, 2019Date of Patent: July 28, 2020Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Publication number: 20200147583Abstract: A hydrated lime product exhibiting superior reactivity towards HCl and SO2 in air pollution control applications. Also disclosed is a method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles. The resultant lime hydrate product has available CaOH of greater than 92%, a citric acid reactivity of less than 20 seconds, a BET surface area greater than 18, a D90 less than 10 ?m, a D50 less than 4 ?m, a D90/D50 less than 3, and a large pore volume of greater than 0.2 BJH.Type: ApplicationFiled: December 27, 2019Publication date: May 14, 2020Inventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, SR., Paul J. Ramer
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Publication number: 20200048145Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.Type: ApplicationFiled: October 2, 2019Publication date: February 13, 2020Inventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, SR., Paul J. Ramer
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Patent number: 10549256Abstract: A hydrated lime product exhibiting superior reactivity towards HCl and SO2 in air pollution control applications. Also disclosed is a method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles. The resultant lime hydrate product has available CaOH of greater than 92%, a citric acid reactivity of less than 20 seconds, a BET surface area greater than 18, a D90 less than 10 ?m, a D50 less than 4 ?m, a D90/D50 less than 3, and a large pore volume of greater than 0.2 BJH.Type: GrantFiled: November 14, 2014Date of Patent: February 4, 2020Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Patent number: 10457598Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.Type: GrantFiled: March 28, 2018Date of Patent: October 29, 2019Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Patent number: 10307766Abstract: Systems and methods to effectively sort calcined lime (quicklime) particles to produce products with more consistent size and burn time characteristics after the quicklime particles have been created and without the use of specialized additives. Specifically, such systems and methods sort the quicklime particles below a selected size into a softer burned and harder burned fraction based on their size. The fractions are burned in the kiln together and as a singular product, but can be classified from each other after calcining.Type: GrantFiled: May 2, 2016Date of Patent: June 4, 2019Assignee: Mississippi Lime CompanyInventors: Mark DeGenova, Randy J. Griffard, David Venhaus
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Patent number: 10307728Abstract: A sorbent composition with improved acid gas reactivity comprising calcium hydroxide particles is provided. In the calcium hydroxide composition, about 90% percent of the calcium hydroxide particles are less than or equal to about 10 microns; the ratio of 90% of the calcium hydroxide particles below a specified size to the ratio of 10% of the calcium hydroxide particles above a specified size is less than about 8; and the calcium hydroxide particles have a BET surface area of about 18 m2/g or greater.Type: GrantFiled: November 4, 2016Date of Patent: June 4, 2019Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Mark G. Degenova, Stephen C. Schweigert, Gerald K. Bequette, William S. Allebach, Zhichao Richard Zhang, Curtiss R. Biehn
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Patent number: 10221094Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively coarse particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated, allowed to mature in a damp state, and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively coarse particles.Type: GrantFiled: March 22, 2017Date of Patent: March 5, 2019Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Sr., Paul J. Ramer
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Patent number: 9963386Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.Type: GrantFiled: May 16, 2017Date of Patent: May 8, 2018Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Gerald K. Bequette, William S. Allebach, Paul J. Ramer
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Patent number: 9517471Abstract: A sorbent composition with improved acid gas reactivity comprising calcium hydroxide particles is provided. In the calcium hydroxide composition, about 90% percent of the calcium hydroxide particles are less than or equal to about 10 microns; the ratio of 90% of the calcium hydroxide particles below a specified size to the ratio of 10% of the calcium hydroxide particles above a specified size is less than about 8; and the calcium hydroxide particles have a BET surface area of about 18 m2/g or greater.Type: GrantFiled: August 24, 2012Date of Patent: December 13, 2016Assignee: Mississippi Lime CompanyInventors: Randy J. Griffard, Mark G. DeGenova, Stephen C. Schweigert, Gerald K. Bequette, William S. Allebach, Zhichao Richard Zhang, Curtiss R. Biehn
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Patent number: 8961912Abstract: Methods for reducing the acidic gas content of effluent gas streams are disclosed. The methods generally involve reducing the acidic gas content of combustion gases passing through a duct by injecting hydrated lime or pulverized quicklime into the duct by use of a shrouded injector which reduces the incidence of occlusion of the injector.Type: GrantFiled: March 28, 2011Date of Patent: February 24, 2015Assignee: Mississippi Lime CompanyInventors: William S. Allebach, Gerald K. Bequette, Randy J. Griffard
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Publication number: 20120251423Abstract: Methods for reducing the acidic gas content of effluent gas streams are disclosed. The methods generally involve reducing the acidic gas content of combustion gases passing through a duct by injecting hydrated lime or pulverized quicklime into the duct by use of a shrouded injector which reduces the incidence of occlusion of the injector.Type: ApplicationFiled: March 28, 2011Publication date: October 4, 2012Applicant: MISSISSIPPI LIME COMPANYInventors: William S. Allebach, Gerald K. Bequette, Randy J. Griffard
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Patent number: 6451281Abstract: A method of manufacturing micro-particulated hydrated lime slurries includes the steps of blending hydrated lime and water to form a mixture, mixing the hydrated lime and water mixture under high shear to form a slurry, transferring the hydrated lime and water slurry to a storage container, and adjusting the percent weight solids of the hydrated lime and water slurry to a predetermined weight solids content. Mixing the hydrated lime and water mixture under high shear can include mixing with a high shear disperser and/or with a high shear rotor/stator mixer. The resultant slurry includes hydrated lime particles with a median particle size of about 6 micrometers or less.Type: GrantFiled: May 30, 2001Date of Patent: September 17, 2002Assignee: Mississippi Lime CompanyInventors: Joseph H. Ebeling, Randy J. Griffard, Mark G. DeGenova
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Patent number: 6200543Abstract: Apparatus and methods for reducing CO2 content of an air stream are described. A method of reducing CO2 content of an air stream in accordance with one embodiment of the present invention includes the steps of first injecting hydrated lime into an air stream containing CO2. The hydrated lime reacts with the CO2 in the air stream to form calcium carbonate, CaCO3. The air stream is then directed into a lime storage container having a dust collector. As air is drawn through the dust collector, hydrated lime and CaCO3 are collected on the filter bags. The air drawn through the dust collector has a reduced CO2 content as compared to the air prior to being injected with hydrated lime. The reduced CO2 content air stream exhausted from the dust collector can then be directed to the different parts of the hydrated lime manufacturing process, such as the milling process, conveying and storing the hydrated lime.Type: GrantFiled: February 25, 1998Date of Patent: March 13, 2001Assignee: Mississippi Lime CompanyInventors: William S. Allebach, Gary F. Lutman, Mark G. DeGenova, Randy J. Griffard