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| Number | Title | Issue Date |
| 7595037 | Method and apparatus for hydration of a particulate or pulverulent material containing CaO, hydrated product, and use of hydrated product Described is a method as well as an apparatus for hydration of a particulate or pulverulent material containing CaO. The method is peculiar in that water is added in a quantity which will ensure that the partial pressure PH2O of the added water as a funct... | 09/29/2009 |
| 7468176 | Feeding device and process and feeding system which utilize the feeding device Feeding device for feeding burned lime to a reaction vessel for causticizing soda liquor to caustic soda. The feeding device, in its upper part, has an inlet for receiving slurry of the burned lime and the soda liquor for formation of said slurry inside said feeding... | 12/23/2008 |
| 7416673 | Method and apparatus for treating lime slurry for grit removal A method and apparatus is provided for conveying lime slurry, removing and controlling the amount of grit, and feeding lime slurry, wherein the lime slurry moves through a recirculation loop, and wherein gravity removal of grit from the lime slurry takes place. A st... | 08/26/2008 |
| 7371356 | Method for the production of precipitated calcium carbonate with a high degree of brightness Calcium carbonate with high brightness is prepared by treating calcium carbonate and/or the milk of lime used for its preparation by reacting milk of lime with carbon dioxide and/or at least one of the calcium-containing preliminary products used for the preparation... | 05/13/2008 |
| 7338649 | Method of producing food grade hydrated lime A method is shown for producing food grade hydrated lime. A source of raw, hydrated lime is first passed through a classification step which divides the raw hydrated lime into a first fine stream and a first coarse stream. The first fine stream is passed through a f... | 03/04/2008 |
| 7326400 | Treatment of high sulfate containing quicklime A method is shown for controlling the presence of soluble sulfate ions in a lime slaking operation in which a source of quicklime is combined with slaking water to form calcium hydroxide product. A complexing agent is added to either the quicklime or the slaking wat... | 02/05/2008 |
| 7323021 | Ash reactivation Sulphur control in fluidized bed combustion systems often involves adding a source of calcium to the combustor so that the calcium may combine with the sulphur. Ash resulting from such combustion often contains a significant amount of calcium which does not combine ... | 01/29/2008 |
| 7282072 | Synthetic fuel and methods for producing synthetic fuel The present invention provides synthetic fuels, additives for use in preparing synthetic fuels and methods for producing synthetic fuel. The synthetic fuels include low levels of a chemical change additive selected from the group consisting of alkaline earth oxides ... | 10/16/2007 |
| 7202197 | Organic lime slurry and method of preparation A method is shown for producing stable, non-settling calcium hydroxide slurries with defined solids, viscosity, reactivity, and particle size. A traditional hydrated lime is first blended with an organic solvent. The hydrated lime and organic solvent blend is then w... | 04/10/2007 |
| 7105146 | Method and apparatus for hydration of calcium oxide An improved system for slaking of lime which does not rely on the weighing of materials delivered to the vessel where the mixing takes place. A control system is utilized to control the volume of lime and water delivered to insure that a preselected temperature is o... | 09/12/2006 |
| 6926879 | Method of producing food grade hydrated lime A method is shown for producing food grade hydrated lime. A source of raw, hydrated lime is first passed through a classification step which divides the raw hydrated lime into a first fine stream and a first coarse stream. The first coarse stream is then passed to a... | 08/09/2005 |
| 6706197 | Method for reducing phosphorus in a body of water This invention provides a method for reducing phosphorous in a body of water. This method comprises calcining a plurality of rocks and collecting carbon dioxide formed as a result of the calcining process; crushing the plurality of calcined rocks; pumping source wat... | 03/16/2004 |
| 6685902 | Procedure and apparatus for the cleaning of flue gases containing sulfur dioxide A process for cleaning flue gases containing ash and sulfur dioxide produced by burning sulfur-containing coal in the combustion chamber of a circulating fluidized-bed firing system includes delivering a particulate SO2 sorbent into the combust... | 02/03/2004 |
| 6508994 | Method and apparatus for cleaning flue gases A method and an apparatus for cleaning flue gases with particulate slaked lime are described. In the method, burnt lime is dry-slaked with water to a moisture content of at least 5% by weight, and the slaked lime is contacted with the flue gases within 1 ... | 01/21/2003 |
| 6451281 | Methods of manufacturing micro-particulated hydrate slurries 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 ... | 09/17/2002 |
| 6391192 | Apparatus for treating biological sludge An automated apparatus for introducing a mixed liquid base (lime) in a first container or tank (106, 106A) into a biological sludge in a second container (110, 110A and 110B) is described. The second container is used to house the sludge for a short perio... | 05/21/2002 |
| 6322769 | Ca(OH)2 particles The present invention is a Ca(OH)2 particle composition and a method of making the composition, the composition consisting essentially of dried calcium hydroxide particles having a moisture content of less than 2 percent by weight of the total ... | 11/27/2001 |
| 6270631 | Method for conditioning fluidised bed combustor ashes A process for hydrating CaO residues in fluidized bed combustor ashes that achieves a better level of hydration, which does not add significantly to the cost of the hydration process, which reduces the consumption of water in the hydration process, and wh... | 08/07/2001 |
| 6245315 | Process for the production of high density hydration resistant lime sinter A process for the production of high density hydration resistant sintered lime which comprises washing limestone having impurities of less than 2% to remove external impurities, crushing the washed limestone to a size of 25 mm or below, calcining the lime... | 06/12/2001 |
| 6074521 | Method of separating impurities from lime and lime sludge A method of separating impurities from lime or the calcium carbonate or the lime sludge produced in the chemical recovery system of a pulp mill so that lime sludge or lime is dissolved in a solution containing carbonate or hydrocarbonate in order to disso... | 06/13/2000 |
| 5965103 | Production of slaked lime A method of producing an aqueous suspension of calcium hydroxide which comprises passing a gaseous flow incorporating particles of calcium carbonate through a calcining furnace thermally to decompose the calcium carbonate, delivering a flow of the decompo... | 10/12/1999 |
| 5876689 | Process for the manufacture of milk of lime During the manufacture of milk of lime by the suspension of lime hydrate which has a large specific surface and was manufactured with the use of organic solvents and/or organic additives, a stable foam forms which can cause problems in the equipment. This... | 03/02/1999 |
| 5872169 | Magnesium process The present invention relates to a flame retardant quality magnesium hydroxide having a BET surface area of less than approximately 10 m2 per gram (uncoated), an average particle size of approximately 0.5 to 10.0 micron, and less than approxima... | 02/16/1999 |
| 5792440 | Method of manufacturing high purity calcium carbonate Flue gases exhausted from a lime kiln containing lime kiln dust are treated to produce a high purity calcium carbonate precipitate. This is accomplished by passing the flue gases from the lime kiln through a kiln dust separator so that lime kiln dust cont... | 08/11/1998 |
| 5746983 | Apparatus and process for calcification Improved device for slaking of lime, comprising a slaker (10) which is connected to a lime silo (24) and a conveyor (30) for supply of lime, equipped with a motor driven mixer (14) with a specially designed mixing organ. Through pipeline with exit valve t... | 05/05/1998 |
| 5705141 | Calcium and/or magnesium hydroxide, and preparation and use thereof The invention relates to a method for the preparation of a special calcium and/or magnesium hydroxide in which CaO and/or MgO is reacted with water in the presence of an additive selected among ethylene glycol, diethylene glycol, triethylene glycol, monoe... | 01/06/1998 |
| 5558850 | Precipitated calcium carbonate The calcium carbonate is prepared by: (a) slaking quicklime in an aqueous medium; (b) carbonating and neutralising the suspension of slaked lime formed in step (a) using a gas comprising carbon dioxide; and (c) separating the precipitated calcium carbonate formed i... | 09/24/1996 |
| 5512265 | Method of producing aqueous solution of slaked lime and apparatus therefor A method of producing an aqueous solution of slaked lime is disclosed the steps of: introducing water into a slaked lime-dissolving apparatus comprising a dissolving tank, a water supply piping connected to a lower part of the tank, a stirring blade dispo... | 04/30/1996 |
| 5502021 | Highly reactive reagents and compositions for purifying exhaust gases and wastewater, production and use thereof This invention concerns highly reactive reagents and compositions for purifying exhaust gases and flue gases and for purifying wastewater as well as the processes for producing same and use thereof. The reagents and compositions are mixtures of calcium hydroxi... | 03/26/1996 |
| 5492685 | High surface area hydrated lime and method of removing SO2 from a gas stream Hydrated lime having high surface area and small particle size is prepared by hydrating lime with an aqueous hydration solution of an organic solvent, and preferably washing the resulting hydrate with an aqueous solution of an organic solvent prior to dry... | 02/20/1996 |
| 5368731 | Vacuum assisted slaker classifier The grit conveyance system of a classifier having a wash region above the liquid layer is provided with a vacuum means in the wash region for positive removal of liquids through a metal screen for disposal.... | 11/29/1994 |
| 5336481 | Method of slaking lime A compact lime slaker has an inner vessel forming an initial slaking chamber disposed in an outer vessel forming a final slaking chamber, with agitators provided in both chambers. Slaked lime-from the final slaking chamber is pumped to a collection trough... | 08/09/1994 |
| 5332436 | Method of increasing the surface area and plastic properties of hydrated lime An invention is shown in which a quicklime is hydrated in the presence of a special chemical modifier to produce a controlled temperature hydrate having improved plastic properties and greater surface areas.... | 07/26/1994 |
| 5310498 | Sulfur dioxide removal from gases using a modified lime A wet scrubbing process for removing sulfur dioxide from combustion gases uses an aqueous slurry containing calcium components resulting from the slaking of lime, with the slaked lime formed by mixing lime with water containing a calcium sulfur-oxide salt... | 05/10/1994 |
| 5277837 | Method and composition for treating flue or exhaust gases utilizing modified calcium hydroxide A process is shown for treating flue or exhaust gases in order to remove sulfur oxides and hydrochloric acids in which calcium hydroxide having a surface area of at least 25 m2 /g and a moisture content lower than 50% is injected in the gases t... | 01/11/1994 |
| 5230880 | Process and device for forming calcium oxide This is a process and a device making use of a process for forming calcium oxide from pulverulent calcium carbonate, according to which an initial bath of pulverulent calcium oxide is produced in a reactor (1, 31) in the form of a fluidized bed which is h... | 07/27/1993 |
| 5223239 | Method of preparing hydrated lime Hydrated lime having high surface area and small particle size is prepared by hydrating lime with an aqueous hydration solution of an organic solvent, and preferably washing the resulting hydrate with an aqueous solution of an organic solvent prior to dry... | 06/29/1993 |
| 5173279 | Method and composition for treating flue or exhaust gases utilizing modified calcium hydroxide A process is shown for treating flue or exhaust gases in order to remove sulfur oxides and hydrochloric acids in which calcium hydroxide having a surface area of at least 25 m2 /g and a moisture content lower than 50% is injected in the gases t... | 12/22/1992 |
| 4997803 | CO2 adsorbent mass The prior-art CO2 adsorbent masses used in oxygen-supplying respirators have the disadvantage that they can be granulated only very poorly. The granules have low strength and a tendency to dusting. The goal of the present invention is to produc... | 03/05/1991 |
| 4943301 | Granulation of magnesium oxide particles Magnesia pellets are formed from finely-divided, highly reactive, lightburned magnesia (MgO) particles by granulating such powders in conventional equipment using either an organic liquid or an organic liquid-binder mixture. The organic liquid may be an a... | 07/24/1990 |
