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| Number | Title | Issue Date |
| 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 |
| 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 |
| 7018464 | Body pigment and process for preparing the same A body pigment with a good skin feel for cosmetics is provided which has an appropriate crumbling property and combines slipping property and adhesiveness without compromising oil absorption. The body pigment is comprised of a metal-containing compound and has a str... | 03/28/2006 |
| 6761866 | Single step process for the synthesis of nanoparticles of ceramic oxide powders The present invention relates to a single step process for the synthesis of nanoparticles of phase pure ceramic oxides of a single or a multi-component system comprising one or more metal ions. The process comprises preparing a solution containing all the required m... | 07/13/2004 |
| 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 |
| 6692710 | Method for obtaining magnesium by leaching a laterite material The present invention provides methods for the isolation and production of magnesium products from leaching of laterite material with acid. A magnesium compound is formed by downstream treatment of a leach stream after at least one of nickel or cobalt hav... | 02/17/2004 |
| 6503475 | Process for the production of ultrafine powders of metal oxides A process for the production of ultrafine powders that includes subjecting a mixture of precursor metal compound and a non-reactant diluent phase to mechanical milling whereby the process of mechanical activation reduces the microstructure of the mixture ... | 01/07/2003 |
| 6451164 | Alkyleneamine composition for enhancing lime mud dewatering A process for de-watering lime mud in a Krafft pulping process is described. The process includes an improvement which comprises adding an effective water-removal rate enhancing amount of an alkyleneamine to the lime mud prior to filtration. The preferred... | 09/17/2002 |
| 6395084 | Platelet/flake magnesium oxide, methods of making the same, and magnesium oxychloride/oxysulfate ceramic materials Magnesium oxychloride and magnesium oxysulfate materials and methods of making the same are disclosed. The materials are cured reaction products of a magnesium oxide, and an aqueous magnesium salt solution. The aqueous salt solution preferably has a speci... | 05/28/2002 |
| 6334990 | Formulation of potassium sulfate, sodium carbonate and sodium bicarbonate from potash brine A process for the preparation of potassium sulfate, sodium bicarbonate and sodium carbonate. The process involves the treatment of potash brines by the reaction of sodium chloride and potassium chloride with calcium sulfate and sodium sulfate. Syngenite p... | 01/01/2002 |
| 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 |
| 6146607 | Process for producing highly reactive lime in a furnace A limestone furnace calcination process involves injecting finely divided limestone particles into a zone in a furnace at which the temperature of the flue gas stream, as it passes through the zone, is above the minimum calcination temperature and below t... | 11/14/2000 |
| 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 |
| 5906804 | Magnesium hydroxide slurries Magnesium hydroxide slurries having the following characteristics: (i) having a solids content of between 40-80 wt. % based on the weight of the slurry with the balance being water; (ii) containing between 0.01-5.0 wt.% of at least one viscosity modifying... | 05/25/1999 |
| 5733865 | Processes for making a crystalline builder having improved performance A convenient process for making builder material which has substantially improved performance and is significantly less expensive than previous builders is provided. The builder material has improved performance in that it unexpectedly has a high calcium ... | 03/31/1998 |
| 5653948 | Method for calcining fine limestone powder Method and apparatus for obtaining finely pulverized quicklime powder having high reactivity by calcining fine limestone powder, particularly, of particle sizes 1-100 micrometers. Coarse particles of inert substance, particularly, those having diameters o... | 08/05/1997 |
| 5498362 | Process for the production of road deicers from water plant residuals An improved process for the production of road deicer products preferably containing calcium magnesium acetate or calcium magnesium acetate/calcium magnesium propionate is provided. The process involves first providing a residual water plant sludge starti... | 03/12/1996 |
| 5380505 | Production of low sulfur content lime from limestone A process for calcining limestone to lime to produce a low sulfur content lime product, while combusting a sulfur-containing carbonaceous fuel in a rotary kiln to provide heat for the calcination. A finely divided lime hydrate is added to the rotary kiln ... | 01/10/1995 |
| 5378319 | Lime mud calcining using dielectric hysteresis heating Lime mud from kraft pulp recovery operations is processed using dielectric hysteresis heating, in a two-stage operation, in which wet lime mud first is dried then the dried lime mud is decomposed to lime and carbon dioxide. A two-zone lime mud calciner is... | 01/03/1995 |
| 5260041 | Method for the calcination of limestone A process for the continuous production of a calcined product containing a high level of reactive oxide valves, from a preheated raw material containing calcium carbonate values, said process comprising, (a) introducing the preheated raw material to the bottom... | 11/09/1993 |
| 5240692 | Basic magnesium carbonate and process for preparation thereof Disclosed is a novel basic magnesium carbonate represented by the following general formula: nMgCO3.Mg(OH)2.mH.sub.2 O wherein n is a number of from 3 to 5 and m is a number of from 3 to 5, which consists of porous particles composed of an agg... | 08/31/1993 |
| 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 |
| 5152973 | Synthesis of submicron powders under reduced oxygen pressure The invention process provides a metal oxide, or oxides of more than one more metal, wherein the oxides have a mean particle size less than 1 micron. The oxides are made by steps including (1) reacting an aqueous solution of a metal salt (or salts) that f... | 10/06/1992 |
| 5122350 | Method for preparing calcium magnesium acetate and a residual mineral product by selectively calcining dolomite Fermentors, reactors and processes for preparing magnesium enriched calcium magnesium acetate (CMA) (Mg:Ca mole ratios of 1:1 to 20:1) by reacting a dolomitic lime product with a Mg:Ca mole ratio less than one with dilute acetic acid, such as in fermentat... | 06/16/1992 |
| 5110567 | Method and apparatus for heat treatment of lime mud In the heat treatment of lime mud, the lime mud to be introduced to a lime reburning kiln is dried in a pneumatic drier by flue gases from the lime reburning kiln in order to regenerate the lime contained in the mud. Prior to drying, the lime mud is thick... | 05/05/1992 |
| 5082648 | Process for the preparation of high purity calcium titanate hydrates and product produced thereby A process for the preparation of high purity calcium titanate hydrates, particularly various forms of kassite, is disclosed. Calcium carbonate and titanium tetraisopropoxide are used as starting materials. The process utilizes a hydrothermal reaction step... | 01/21/1992 |
| 5041400 | Low temperature synthesis of high purity monoclinic celsian A process for preparing monoclinic celsian from AlF3, Al2 O3, BaCO3, and fused SiO2 powders by heating an intimate mixture of the powders (1) at from about 700° to 900° C. to form topaz and then (2)... | 08/20/1991 |
| 4994419 | Low temperature synthesis of high purity monoclinic celsian using topaz A process for preparing monoclinic celsian from topaz and BaCO3, pows by heating an intimate mixture of the powders at a temperature of from 900° C. to less than 1590° C. in an atmosphere of the gases generated by the monoclinic celsian form... | 02/19/1991 |
| 4927611 | Lightweight magnesia clinker and process for the preparation of the same A lightweight magnesia clinker containing magnesium oxide in an amount of more than 85 wt. % and having an apparent porosity of more than 40 vol. % and a bulk specific gravity of less than 2.0 g/cm3 is disclosed. In the lightweight magnesia cli... | 05/22/1990 |
| 4904638 | Method of producing superconducting ceramics by co-precipitation of carbonates A process is disclosed for producing a homogeneous mixture of co-precipitated carbonate salts capable of reacting together in an oxygen atmosphere at an elevated temperature to form a superconducting ceramic which comprises forming a first solution by dis... | 02/27/1990 |
| 4888161 | Method of forming dense, unsintered, granular alkaline earth metal carbonates A method of converting fine particle size alkaline earth metal carbonate, e.g., barium or strontium carbonate, into a free-flowing granular form with relatively high bulk density, without sintering, grinding, or briquetting, is disclosed. It involves the ... | 12/19/1989 |
| 4888308 | Glass manufacture using dense, unsintered, granular alkaline earth metal carbonates A glass manufacturing process using a granular, free-flowing form of alkaline earth metal carbonate, e.g., barium or strontium carbonate, is disclosed. The alkaline earth metal carbonate has a relatively high bulk density and is made without sintering, gr... | 12/19/1989 |
| 4871519 | Method of making magnesium oxide and hydrates thereof A process for producing magnesium oxide and/or hydrates thereof from predominantly magnesium or magnesium-calcium raw materials, and optionally producing calcium carbonate, whereby the raw material is roasted if necessary to form a mixture of magnesium ox... | 10/03/1989 |
| 4859652 | Method for preparation of high temperature superconductors using trichloroacetates Superior homogeneity in ceramic materials is achieved by forming an aqueous solution of trichloroacetates of certain metals, heating the solution to decompose the trichloroacetates to form carbonate precipitates, and recovering the carbonate precipitates.... | 08/22/1989 |
| 4828620 | Calcination of calcium carbonate and blend therefor A method for calcination of a calcium carbonate material comprising heating the calcium carbonate material to a temperature and for a time sufficient to calcine the material to the degree desired while in the presence of a catalyst; said catalyst comprisi... | 05/09/1989 |
| 4775490 | Magnesium overbasing process The invention describes a process for overbasing a substrate comprising mixing the substrate, water, a phenol, a source of magnesium and a carbonating agent, wherein the water is retained throughout the overbasing reaction and provided further that the we... | 10/04/1988 |
| 4767464 | Carbonate-containing mineral fillers, pigments and similar materials Carbonate-containing mineral fillers, pigments and similar materials are disclosed which are characterized by a combination of four features. These carbonate-containing materials can be used in particular in dyes, paints, paper pulps, paper coatings and p... | 08/30/1988 |
| 4748010 | Energy conserving limestone calcining system Energy conserving limestone calcining system, including a process and apparatus in which in a first step or kiln zone limestone is heated, e.g., at 1700°-2100° F., sufficiently to achieve more than only about 50 or 60%, e.g., 75%, partial conversion the... | 05/31/1988 |
| 4721691 | Magnesia clinker and method of producing the same The present invention disclosed a magnesia clinker excellent in corrosion resistance, which is useful for a magnesia carbon refractory and also for a refractory for steel manufacturing furnace, and the magnesia clinker is characterized by: (a) having a pu... | 01/26/1988 |
