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8158098 |
Processes for preparation of compositions comprising potassium chloride
Provided herein are processes for obtaining sylvinite and/or sylvite from sea water, sea bitterns and/or sea salts. The processes comprise reacting sea water, sea bitterns and/or sea salts with...
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8158089 |
Compositions and methods for wastewater treatment
Particular aspects provide a method for recovering phosphate, comprising: obtaining an effluent or wastewater, etc. having calcium-sequestered phosphate; adding to the effluent or wastewater a...
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8021442 |
Process for the preparation of common salt of high purity from brines in solar salt pans
The process of the invention is an improvement over the existing process of producing salt of high purity from alum-treated brine disclosed recently in the prior art. More particularly, the...
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8012445 |
Method and apparatus for manufacturing of a calcium carbonate product, the product and its use
A method and apparatus for producing a calcium carbonate product formed of small <100 μm sized separate calcium carbonate particles. Calcium hydroxide is fed through a disintegration and spraying ...
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7829053 |
Non-cementitious compositions comprising CO2 sequestering additives
Non-cementitious CO2 sequestering compositions are provided. The compositions of the invention include a CO2 sequestering additive, e.g., a CO2 sequestering carbonate composition. Additional...
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7749483 |
Method for producing alkaline earth metal oxides
Disclosed is a processes for the production of relatively high purity alkaline earth metal oxides, such as SrO, from relatively low purity forms of carbonated or other oxygenated forms of such...
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7722841 |
Polymeric chelant and coagulant to treat metal-containing wastewater
The present invention is directed to the use of a combination of a polymeric chelant and coagulant to treat metal containing wastewater. More particularly, the invention is directed at removing...
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7682589 |
Method for industrial manufacture of pure MgCO3 from an olivine containing species of rock
Method for industrial manufacture of pure MgCO3 comprising providing an olivine containing species of rock, to comminute the olivine containing species of rock to increase its surface, to contact...
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7595001 |
Process for the treatment of saline water
A process and an apparatus are described for treating seven types of saline waters each having a concentration of total dissolved solids exceeding 1 g/L, wherein the concentration of total...
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7553462 |
Method for the production of Mg (OH)2 nanoparticles
A method for the production of Mg(OH)2 nanoparticles, by means of polyol-mediated synthesis, from an Mg precursor as well as a base. The particles produced with this method have a diameter between...
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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...
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7300539 |
Treatment of solid containing material derived from effluent
A method of treating solid containing material derived from effluent or sludge from a plant for deinking paper, the material containing calcium in the form of one or more insoluble calcium...
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7288241 |
Black composite oxide particle and method for production thereof
A black composite oxide particle includes a composite oxide having Fe, Mg and Al as metal components. The particle contains Fe, Mg and Al in amounts of 30 to 55 mass %, 1 to 10 mass %, and 1 to 10...
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7288239 |
Method for producing alkaline earth sulphate nanoparticles
The invention relates to synthesis of nanoparticles, in particular to methods for producing nanoparticles with networks consisting of Z sulphate (Z=magnesium (Mg), calcium (Ca), strontium (Sr),...
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7282188 |
Method and device for producing a metal hydroxide
The invention concerns a method and an apparatus for producing a metal hydroxide, in particular magnesium hydroxide, from a salt solution, wherein the metal is firstly precipitated from the salt...
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7238331 |
Process for producing nano-powders and powders of nano-particle loose aggregate
The present invention discloses a process for producing nano-powders and powders of nano-particle loose aggregate, which includes: (a) providing at least two reactant solutions A and B capable of...
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7179441 |
Method for preparing barium-titanate based powder
The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the...
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7022302 |
Process for preparing hydrotalcite and brucite type posite charged layers
An improved process is described for the preparation of surface modified hydrotalcite. The process comprises reacting a precursor of magnesium and aluminium in the presence of suitable alkali...
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7014832 |
Simultaneous recovery of potassium chloride and KCL enriched edible salt
The present invention relates to recovery of industrial grade potassium chloride and low sodium edible salt from bittern as part of an integrated process. The process comprises, mixing low sulphate...
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6827914 |
Method, apparatus and use of chelating agents for the purification of calcium sulphate
A chemical process for the purification of CaSO4 utilizes the ability of an aqueous solution of a chelating agent to selectively dissolve CaSO4 in that the initial extraction can be carried out at...
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6814947 |
Method for producing calcium compounds containing water of crystallization
The invention relates to the production of calcium compounds containing water of crystallization by means of a chemical reaction between an aqueous alkaline sodium aluminate solution and solid or...
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6811704 |
Method for anion removal by forming chemical precipitation under an electric field and continuous process for anion removal
The present disclosure relates to a method for removing anions such as nitrate ion, sulfate ion, chloride ion, and phosphate ion existing in underground water, surface water or waste water. The...
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6800260 |
Processes for treating iron-containing waste streams
Processes for treating iron containing waste streams are provided. According to these processes, metal-containing compounds, particularly iron oxides are produced. These methods may, for example,...
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6797249 |
Process for the preparation of amorphous silica
The invention provides a process for the production of amorphous silica from a silica-based material having a silica content of at least 90% comprising: a) heating said silica-based material with...
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6682713 |
Iron sulfides, processes for producing the same, iron sulfide mixture, heavy metal treating agent, and method of treating with the agent
Novel iron sulfides having excellent durability and excellent treating properties of heavy metals, processes for producing the iron sulfides, iron sulfide mixture, a heavy metal treating agent...
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6645458 |
Method for making an aqueous sodium chloride solution
Process for the manufacture of an aqueous sodium chloride solution, according to which a solid material comprising sodium chloride and heavy metals is dispersed in water, the aqueous medium thus...
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6627085 |
Treatment of brine to remove metals and silicon therefrom
Disclosed is a process for reducing the amount of silicon in brine. More specifically the silicon content of the brine is reduced to 1 ppm or less by using low caustic excess. The disclosed process...
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6622523 |
Method of converting halogenated compounds to glass
The present invention provides a two stage process of thermal separation of CFCs and HCFCs followed by vitrification of the waste into a commercially viable glass. In the first stage, the...
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6517788 |
Method and device for separating caesium, strontium and transuranium elements contained in sodium waste
The present invention relates to a method for the continuous separation of caesium, strontium and transuranium elements contained in sodium waste which comprises the use of NaTPB, and to a device...
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6451276 |
Recovery of elemental phosphorus from phosphorus sludge
Disclosed is a method of recovering elemental phosphorus from a sludge that contains water, dirt, and elemental phosphorus. In the first step, the sludge is melted. A mixture is formed of the...
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6409980 |
Process and apparatus for treating foundry sludge to recover magnesium
Process and apparatus for recovering magnesium from foundry sludge and cell bleed electrolytes includes structure and/or steps for: (i) dissolving, in a water slurry, soluble chloride compounds in...
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6355221 |
Process for removing soluble fluoride from a waste solution containing the same
The present invention relates to a process for recovery of particulate calcium fluoride from a waste solution containing soluble fluoride. More specifically, the invention relates to a process for...
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6280630 |
Process for the treatment of effluent streams
This invention relates to a process for removing sulphates and calcium from a water stream which includes the steps of: combining the water stream and an amount of amorphous aluminum trihydroxide...
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6267962 |
Compositions and methods of treatment using peat derivatives
Novel compositions containing at least one biologically active component derived from peat or similar composition, methods for their preparation and therapeutic uses for a variety of diseases,...
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6251352 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Recovery of elemental phosphorus from phosphorus sludge
Disclosed is a method of recovering elemental phosphorus from a sludge that contains water, dirt, and elemental phosphorus. In the first step, the sludge is melted. A mixture is formed of the...
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6224844 |
Process for the production of calcium fluoride
A process is disclosed for producing calcium fluoride comprising: (a) mixing aqueous H3 PO4 with aqueous H2 SiF6 to form a mixture such that the concentration of H3 PO4 is at least about 3...
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6214301 |
Hafnium radioisotope recovery from irradiated tantalum
Hafnium is recovered from irradiated tantalum by: (a) contacting the irradiated tantalum with at least one acid to obtain a solution of dissolved tantalum; (b) combining an aqueous solution of a...
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6193945 |
Method of recovering calcium from waste material or contaminated natural calcic material
Method of recovering calcium carbonate from waste material or contained natural calcic material. Calcium is recovered by prepariag an aqueous suspension the material containing calcium to be...
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6132696 |
Manufacture of precipitated calcium carbonate of improved color and stable crystalline form
A method for the manufacture of precipitated calcium carbonate from impure calcium oxide of improved color is disclosed. The method comprises admixing impure calcium oxide with an aqueous solution...
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6001316 |
Method for treatment of waste material and recovering MgCl2
Method of treatment of environmentally hazardous waste material and recovering MgCl2 brine, based on dissolving of the waste material in water and hydrochloric acid and simultaneous removal of...
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5980854 |
Method for the production of a magnesium chloride solution
The present invention is concerned with a method for the extraction of magnesium from magnesium-containing materials such as magnesite, dolomite and silicates materials like serpentine residues,...
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5881359 |
Metal and fluorine values recovery from fluoride salt matrices
The process for converting feed materials of high mineral content containing primary metal values and fluorine values to the primary metal or useful compounds thereof and to fluorine values or...
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5866088 |
Process for preparing anhydrous magnesium halide solution and process for preparing solid titanium catalyst component for olefin polymerization
Disclosed is a process for preparing an anhydrous magnesium halide solution, comprising a step of distilling water off from an oxygen-containing organic solvent solution of hydrous magnesium halide...
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5769906 |
Process for recovering the salt constituents from hardening-shop salt baths
The process for environmentally acceptable and economical recovery of chloride salts from hardening-shop used salts utilizing the steps of leaching of the used salt, detoxification of the cyanide...
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5678242 |
Membrane extraction with thermodynamically unstable diphosphonic acid derivatives
Thermodynamically-unstable complexing agents which are diphosphonic acids and diphosphonic acid derivatives (or sulphur containing analogs), like carboxyhydroxymethanediphosphonic acid and...
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5678241 |
Process for concentrating thorium containing magnesium slag
The present invention describes a process to reduce the volume and/or weight of magnesium slag when the magnesium slag contains radioactive thorium. The process contacts the magnesium slag as an...
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5574960 |
Method of separating exothermic elements from high-level radioactive liquid waste
A method of separating exothermic elements of Cs and Sr from a high-level radioactive liquid waste. The method comprises a denitration step wherein formic acid is added to the high-level liquid...
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5518631 |
Dephosphorizing material and method of dephosphorization
A dephosphorizing material disposed so that a material containing iron as a main component and a calcium compound material contact a phosphorus-containing aqueous solution, and provided with a...
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5516496 |
Metal and fluorine values recovery from fluoride salt matrices
The process for converting feed materials of high mineral content and substantial radioactivity levels to concentrated radionuclide products of high radioactivity levels and to other products of...
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5487878 |
Method for preparing perpendicularly magnetizable material usable on magnetic recording media
A method for preparing a perpendicularly magnetizable material usable on magnetic recording media comprises the steps of: dissolving at least one member of the group consisting of strontium...
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