|
Match
|
Document |
Document Title |
|
|
8128903 |
Method of treating a precipitate comprising iron (II) sulfate monohydrate, a plant, granular material and its uses
The invention relates to a method of controlling the solubility of granular material by treating a precipitate comprising iron(II)sulphate monohydrate originating from titanium dioxide production,...
|
|
|
8124039 |
Process of silicon tetrafluoride gas synthesis
A process of producing silicon tetrafluoride from fluoride containing feedstocks. The process calcines the fluoride containing feedstock and a silica containing feedstock before reacting the...
|
|
|
8088348 |
Air pollution control system and method for coal combustion boiler
An air pollution control system for a coal combustion boiler includes: a NOx removing apparatus that reduces nitrogen oxide contained in flue gas emitted from this coal combustion boiler, an air...
|
|
|
8088349 |
Clean method for preparing layered double hydroxides
Disclosed is a clean method for preparing layered double hydroxides (LDHs), in which hydroxides of different metals are used as starting materials for production of LDHs by atom-economical...
|
|
|
8043594 |
Systems and methods for generating sulfuric acid
Methods and systems for generating sulfuric acid are disclosed. In some embodiments, the method includes combusting a sulfur-containing material with a gas including oxygen to produce a first...
|
|
|
7955587 |
System and method for the production of alpha type gypsum using heat recovery
The present invention relates to a system and associated method for the production of gypsum in manufacturing plant. More specifically, the invention relates to the production of alpha-type gypsum...
|
|
|
7951352 |
Method for the production of alpha-calcium sulfate hemihydrate from calcium sulfate dihydrate
Disclosed is a method for producing alpha-calcium sulfate hemihydrate from calcium dihydrate. Said method has the following features: a) calcium dihydrate is fed to an agitated autoclave (1); b)...
|
|
|
7928033 |
Catalyst for reducing mercury, a mercury conversion unit, and an apparatus for measuring total mercury in combustion exhaust gas by using the same
The present invention relates to a catalyst for reducing mercury, which comprises a reagent comprising any of the sulfites of potassium, sodium, calcium and magnesium, or any of the phosphates...
|
|
|
7910230 |
High resistance gypsum parts and preparation method to obtain these parts
The preparation of gypsum parts (dihydrate calcium sulfate) with high mechanical strength is obtained with the aid of water layers with nanometric thickness. Calcium sulfate is used, dihydrate as...
|
|
|
7897134 |
System and method for calcining gypsum
A system (100) for calcining natural gypsum, synthetic gypsum (112) or a combination thereof, the system including: a mill (114) for grinding and drying natural gypsum, synthetic gypsum (112) or a...
|
|
|
7887769 |
Method of removing sulfur dioxide from flue gases and treatment of oxidized effluent therefrom
A method of removing sulfur dioxide from flue gases using calcium and magnesium scrubbing components and treatment of oxidized effluent from such a system includes passing classified oxidized...
|
|
|
7824490 |
Calcium sulfate hemihydrate treatment process
A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure.
|
|
|
7803396 |
Product for controlling dissolving rate of orthopedic implant material and process of producing the same
A product controlling dissolving rate of biomedical orthopedic implant material and a process of manufacturing the same are disclosed. At constant temperature and humidity and under vacuum,...
|
|
|
7799310 |
Systems and methods for generating sulfuric acid
Methods and systems for generating sulfuric acid (102) are disclosed. In some embodiments, the method includes combusting a sulfur-containing material (114) with a gas including oxygen (116) to...
|
|
|
7771700 |
Sorbents for removal of mercury from flue gas cross reference to related applications
Systems are disclosed for making and using micro-porous particulates at least partially composed of metal sulfides, particularly alkaline earth metal and transition metal sulfides, as sorbents for...
|
|
|
7771851 |
Gypsum-containing products containing alpha hemihydrate
The invention provides gypsum wallboard, made from gypsum-containing slurries having outstanding hydration rate characteristics comprising alpha-hemihydrate ground to a particular particle size...
|
|
|
7700066 |
Process for preparing alpha calcium sulfate hemihydrate
The invention provides a process for preparing α-calcium sulfate hemihydrate which comprises the following steps: adding aqueous solutions containing sulfate ions and calcium ions to calcium ...
|
|
|
7695561 |
Alpha-type calcium sulfate hemihydrate compositions
Disclosed is an improved alpha-type calcium sulfate hemihydrate. Methods of producing an improved powdered calcium sulfate hemihydrate (CaSO4.½H2O) [alpha-type] compound are disclosed, at least ...
|
|
|
7588634 |
Process for manufacturing ultra low consistency alpha- and beta- blend stucco
A process is disclosed for making a blend of alpha- and beta-stucco including a slurry calcination step to produce alpha calcium sulfate hemihydrate followed by a fluidized bed calcination step to...
|
|
|
7585485 |
Process for the physiochemical conditioning of chemical gypsum or phospho-gypsum for use in formulation for cement and other construction materials
The present invention is based on solid-state reaction or reactions in the presence of small amounts of water, between phospho gypsum and agglutinating-neutralizing agents, principally though the...
|
|
|
7575735 |
Metal oxide and metal fluoride nanostructures and methods of making same
The present invention includes pure single-crystalline metal oxide and metal fluoride nanostructures, and methods of making same. These nanostructures include nanorods and nanoarrays.
|
|
|
7556791 |
Gypsum anhydrite fillers and process for making same
A process is disclosed for making dead burn calcium sulfate anhydrite. The process includes a slurry calcination step to produce calcium sulfate anhydrite followed by removing free water from the...
|
|
|
7517514 |
Process for treating residue of organic material
A process for treating organic material, separating calcium and recovering phosphorus and to utilization of the obtained products and their use as a soil conditioner and a fertilizer as well as for...
|
|
|
7498014 |
System and method for the production of alpha type gypsum using heat recovery
The present invention relates to a system and associated method for the production of gypsum in manufacturing plant. More specifically, the invention relates to the production of alpha-type gypsum...
|
|
|
7476372 |
Flue gas scrubbing process utilizing biosolids
A method for reducing acid gases in a flue gas, the method comprising reacting biosolids comprising a scrubbing agent with a flue gas comprising an acid gas, thereby reducing the amount of acid gas...
|
|
|
7468169 |
Process for producing calcium trisulfoaluminate and apparatus for use in said process
This invention provides a production process, which can stably produce high-quality satin white (calcium trisulfoaluminate) having very small and homogeneous particulate shapes suitable for...
|
|
|
7427384 |
Method of reducing sulfur dioxide emissions of a circulating fluidized bed boiler
A method of reducing sulfur dioxide emissions of a circulating fluidized bed boiler. Sulfur-containing carbonaceous fuel is fed to a furnace of the boiler, and calcium carbonate is fed to the...
|
|
|
7351387 |
Method for removing impurities accumulated in a scrubbing fluid
A method for removing impurities accumulated in a scrubbing fluid in a flue gas scrubber and effluents from the scrubber. The flue gases are scrubbed with a scrubbing fluid that includes a...
|
|
|
7306776 |
Method and an apparatus for processing flue gas scrubber material flows
A method for processing flue gas scrubber material flows. The flue gas is scrubbed with a calcium-based absorbent containing washing fluid for absorbing sulphur oxides from the flue gases, and the...
|
|
|
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),...
|
|
|
7247284 |
Method and apparatus for regeneration of flue gas scrubber caustic solutions
A process to regenerate wet flue gas scrubber purge liquid into NaOH caustic suitable for make-up caustic for the scrubber is disclosed. Further, sulfur is removed from waste effluent in the form...
|
|
|
7211235 |
Method for producing hydrotalcites
A method is described for the manufacture of hydrotalcites by using at least one compound of a bivalent metal (Component A) and at least one compound of a trivalent metal (Component B), wherein at...
|
|
|
7118718 |
Gypsum decontamination process
A process for reducing a level of radionuclei in a phosphogypsum material having a radioactive contaminant is provided, wherein the process includes the steps of: (a) mixing the phosphogypsum...
|
|
|
6964704 |
Calcium sulphate-based composition and methods of making same
Disclosed is an improved alpha calcium sulfate hemihydrate. Methods of producing an improved powdered calcium sulfate hemihydrate (CaSO4·½H2O) [alpha-type] compound are disclosed, at least one m...
|
|
|
6939523 |
Method of removing SO3 from flue gases
A calcium hydroxide slurry is injected into the off gases in the exhaust duct of an industrial plant which burns sulfur containing fuels. The calcium hydroxide slurry reacts with SO3 produced as a...
|
|
|
6932952 |
Method and apparatus for wet type flue-gas desulfurization
A wet type exhaust gas desulfurization method includes sucking liquid in a liquid reservoir containing a sulphur compound formed from sulphur dioxide contained in exhaust gas so as to form a flow...
|
|
|
6896858 |
Gas refining system
A gas refining method for adsorbing a reducing gas obtained by pressure gasification of coal or oil comprises introducing a reducing gas stream into an adsorbing and removing zone where it contacts...
|
|
|
6872373 |
Flue gas processing apparatus and desulfurization method
A flue gas processing apparatus for removing sulfur oxide contained in a gas, including a desulfurization tower through which the gas flows, the desulfurization tower including a catalyst unit...
|
|
|
6861041 |
Method for treating and upgrading effluents containing metallic sulphates using an ammonia addition step
A method for treating and upgrading effluents containing at least a metallic sulphate comprising adding at least a base to the effluent to precipitate the metallic ions in the form of iron...
|
|
|
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...
|
|
|
6780391 |
Method of producing surgical grade calcium sulphate
A method of producing surgical grade calcium sulphate suitable for use as resorbable osteoconductive bone void filler material. The method comprising forming an initial calcium sulphate di-hydrate...
|
|
|
6726889 |
Production of zinc oxide from acid soluble ore using precipitation method
The present invention relates to an apparatus and a process for producing zinc oxide from an acid soluble zinc-bearing material. The process according to the present invention comprises the steps...
|
|
|
6706113 |
Method for producing an anhydrite III or α based hydraulic bonding agent
A process for synthesizing a hydraulic binder based on natural calcium sulfate (gypsum), the process consisting in heating the calcium sulfate to obtain a large proportion of anhydrite III or α ...
|
|
|
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...
|
|
|
6656440 |
Exhaust gas desulfurizing method and system therefor
A method and system for desulfurizing flue gas in which desulfurization is effected by bringing absorbent slurry containing limestone into contact with flue gas. The method classifies absorbent...
|
|
|
6652825 |
Method of producing calcium sulfate alpha-hemihydrate
A method of producing calcium sulfate α-hemihydrate is disclosed, including the steps of exposing a mixture including a calcium sulfate form selected from the group consisting of calcium sulfate ...
|
|
|
6613141 |
Recovery of cement kiln dust through precipitation of calcium sulfate using sulfuric acid solution
A method and apparatus for recovering calcium sulfate di-hydrate (gypsum) from a precipitation reaction between cement kiln dust and commercial, spent or waste grade sulfuric acid solution. The...
|
|
|
6555082 |
Method for wet flue gas desulfurization and device for implementing said method
A method and apparatus for wet flue gas desulfurization in a two-circuit washer having two washers for an absorption agent based on suspensions containing calcium compounds, a sump for supplying...
|
|
|
6533943 |
Process for the removal of oxidizing agents
A synthesized compound that is able to neutralize oxidizing agents such as nitrates from water systems, from ground surfaces and other sites. When contaminated water is passed through the...
|
|
|
6517790 |
Converting fluorgyp to calcium sulfate
Fluorgyp is converted to calcium sulfate by reacting sulfuric acid in the fluorgyp with calcium carbonate having a small particle size. The resulting product is useful as a set retarding agent for...
|