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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7381244 | Apparatus and process for air cleaning A process and an apparatus for removal of radon from indoor air. The process having the step of contacting indoor air with an adsorbent, that is a silver-exchanged zeolite. The apparatus for the removal of radon from indoor air comprises a silver exchanged zeolite. | 06/03/2008 |
| 7293568 | Aqueous solutions of silicon metal and methods of making and using same The present invention generally relates to a formulation created by reacting sodium hydroxide, water, and silicon metal which has unique properties and many uses. The instant invention is further directed to methods of producing and using such formulations. ... | 11/13/2007 |
| 7091393 | Processes for immobilizing radioactive and hazardous wastes The present invention utilizes one or more processes to immobilize a waste that contains one or more of radionuclides, hazardous elements, hazardous compounds, and/or other compounds present in the waste. Each of the processes create a barrier against leaching and d... | 08/15/2006 |
| 7019189 | Process and composition for the immobilization of radioactive and hazardous wastes in borosilicate glass The present invention provides processes to immobilize radioactive and/or hazardous waste in a borosilicate glass, the waste containing one or more of radionuclides, hazardous elements, hazardous compounds, and/or other compounds. The invention also provides borosil... | 03/28/2006 |
| 6812174 | Low melting high lithia glass compositions and methods The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts, typically from about 0.16 wt % to about 11 wt %, based on the total ... | 11/02/2004 |
| 6676915 | Method for conditioning soda effluents in the form of nepheline This invention relates to a method for conditioning a waste constituted of an aqueous solution of sodium hydroxide NaOH of 3 to 10 M, possibly radioactive. The method is as follows: a) a metakaolin powder is added to the aqueous solution such that a s... | 01/13/2004 |
| 6635796 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials, sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general c... | 10/21/2003 |
| 6630419 | Low melting high lithia glass compositions and methods The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts, typically from about 0.16 wt % to about 11 wt %, based on... | 10/07/2003 |
| 6624103 | Low melting high lithia glass compositions and methods The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts, typically from about 0.16 wt % to about 11 wt %, based on... | 09/23/2003 |
| 6624339 | Method to confine plutonium in apatitic ceramics and products obtained using said process A phosphosilicate apatite useful as a confinement matrix for radioactive waste, and having the formula: wherein: M represents an alkaline metal, Ln represents at least one cation selected from lanthanides, and t, x, y, z, w and u are such that: 0ࣘ... | 09/23/2003 |
| 6518477 | Simplified integrated immobilization process for the remediation of radioactive waste A method for remediating non-homogeneous radioactive waste to significantly reduce the waste mass/volume and to convert such waste to products that meet federal regulatory compliance standards is disclosed. High level waste (HLW) stored in underground tan... | 02/11/2003 |
| 6489531 | Confinement of caesium and/or rubidium in apatitic ceramics The invention relates to the containment of caesium and/or rubidium, in particular 135 Cs and 137 Cs in an apatitic matrix of formula: Mt Cax Lny (PO4)6-u (SiO4)u X i... | 12/03/2002 |
| 6436271 | Preparation of mineral matrices by cold crucible induction melting The aim of the present invention is a process for preparing a mineral matrix by melting, which is implemented according to the method of direct cold crucible induction melting. The method employs a step for initiating the melting. During the initiation st... | 08/20/2002 |
| 6296786 | Treated waste, method for making the same and apparatus for making the same A treated waste has been treated so as to prevent diffusion of a substance to be disposed, of e.g., radionuclide "I", that tends to occur when the waste is disposed of in reducing environment at an ultra-deep underground. The treated waste has a low-resol... | 10/02/2001 |
| 6291736 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials, sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general c... | 09/18/2001 |
| 6288300 | Thermal treatment and immobilization processes for organic materials Organic materials are mixed with metal oxide, such as hydrated metal oxides, prior to or during heat treatments in aerated or oxygenated environments to stabilize thermal decomposition or incineration of the organic materials and to suppress the emission ... | 09/11/2001 |
| 6231767 | Treatment of phosphatic wastes A process for treating thickened phosphatic clay suspensions, waste clay and phosphogypsum produced in the processing of phosphate ore by water beneficiation and chemical processing, the thickened phosphatic clay suspension having a solid content of from ... | 05/15/2001 |
| 6023006 | Method of manufacturing compounds of the monazite type, doped or not doped with actinides and application to the packaging of radioactive waste high in actinides and in lanthanides The invention relates to a method of manufacturing compounds of the Monazite type, doped or not doped with actinides, to a method of packaging radioactive waste, high in actinides and in lanthanides by incorporating this waste in a confining matrix based ... | 02/08/2000 |
| 5998690 | Method and agents for solidification of boric acid and/or borates solutions A unique method for solidification of solutions containing boric acid and/or borates is disclosed in this invention. The boron species in the solutions are polymerized to form polyborates, and the solutions are then solidified by mixing with solidificatio... | 12/07/1999 |
| 5994608 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials,sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general co... | 11/30/1999 |
| 5880060 | Compositions to remove heavy metals and radioactive isotopes from wastewater Treatment compositions and a method are provided for the removal of a plurality of heavy metals and radioactive isotopes from wastewater. The treatment compositions comprise an alkali; adsorbents, such as montmorillonite and illite clays; catalysts, such ... | 03/09/1999 |
| 5875407 | Method for synthesizing pollucite from chabazite and cesium chloride A method for immobilizing waste chlorides salts containing radionuclides and hazardous nuclear material for permanent disposal, and in particular, a method for immobilizing waste chloride salts containing cesium, in a synthetic form of pollucite. The meth... | 02/23/1999 |
| 5771472 | Process for the conditioning of radioactive waste using phosphosilicated apatites as the confinement matrix The invention relates to a process for the conditioning of radioactive waste using silicated apatites as the confinement matrix. This process consists of incorporating the waste (1) into a phosphosilicated apatite-based confinement matrix (3) e.g. complying wi... | 06/23/1998 |
| 5732366 | Method of reprocessing metal parts radioactively contaminated with uranium A method for reprocessing metal parts that are radioactively contaminated with uranium includes smelting the metal parts so that a melt and a slag are formed. U235 -depleted uranium is admixed with the metal parts and/or the melt and/or the sla... | 03/24/1998 |
| 5711016 | Process for the conditioning of radioactive iodine, particularly iodine 129, using an apatite as the confinement matrix The invention relates to the conditioning or packaging of radioactive iodine, particularly iodine 129, using an apatite as the confinement matrix. Having the iodine, said apatite corresponds to the formula: M10 (XO4)6-6x (PO | 01/20/1998 |
| 5678235 | Safe ceramic encapsulation of hazardous waste with specific shale material A safely encapsulated hazardous waste product free of unwanted leaching of contaminated metal constitutents and process therefor wherein a quantity of hazardous waste and a quantity of shale material characterized by having an aluminosilicate content cont... | 10/14/1997 |
| 5678238 | Micro encapsulation of hydrocarbons and chemicals A method for cleaning contaminated surfaces or for cleaning bulk contamination of hydrocarbons or chemicals. To clean hydrocarbon or chemical contaminated surfaces, a basic aqueous silica solution is sprayed onto the contaminated surface and allowed to dr... | 10/14/1997 |
| 5637127 | Plasma vitrification of waste materials This invention provides a process wherein hazardous or radioactive wastes in the form of liquids, slurries, or finely divided solids are mixed with finely divided glassformers (silica, alumina, soda, etc.) and injected directly into the plume of a non-tra... | 06/10/1997 |
| 5613240 | Method of preparing sodalite from chloride salt occluded zeolite A method for immobilizing waste chloride salts containing radionuclides and hazardous nuclear material for permanent disposal starting with a substantially dry zeolite and sufficient glass to form leach resistant sodalite with occluded radionuclides and h... | 03/18/1997 |
| 5591420 | Cesium titanium silicate and method of making The invention is the new material, a ternary compound of cesium, silica, and titania, together with a method of making the ternary compound, cesium titanium silicate pollucite. More specifically, the invention is Cs2 Ti2 Si4 | 01/07/1997 |
| 5545797 | Method of immobilizing weapons plutonium to provide a durable, disposable waste product A method of atomic scale fixation and immobilization of plutonium to provide a durable waste product. Plutonium is provided in the form of either PuO2 or Pu(NO3)4 and is mixed with and SiO2. The resulting mixtur... | 08/13/1996 |
| 5463171 | Method for solidification of waste, and apparatus, waste form, and solidifying material therefor Objective of the present invention is to provide a preferable solidified body ensuring performance of artificial barrier in a solidifying process for incombustible miscellaneous solid waste and other wastes such as calcined ashes by preventing generation ... | 10/31/1995 |
| 5434333 | Method for treating materials for solidification A method for treating materials such as wastes for solidification to form a solid, substantially nonleachable product. Addition of reactive silica rather than ordinary silica to the material when bringing the initial molar ratio of its silica constituent ... | 07/18/1995 |
| 5340506 | Method to synthesize dense crystallized sodalite pellet for immobilizing halide salt radioactive waste A method for immobilizing waste chloride salts containing radionuclides such as cesium and strontium and hazardous materials such as barium. A sodalite intermediate is prepared by mixing appropriate amounts of silica, alumina and sodium hydroxide with res... | 08/23/1994 |
| 5277846 | Process for treating incinerable waste containing radio nuclides A process for treating incinerable waste comprises grinding the incinerable waste into small particle size, delivering the ground incinerable waste by means of a carrying gas to the lower part of a molten silica bath and pouring said molten silica contain... | 01/11/1994 |
| 5045241 | Method for solidifying radioactive wastes A method of solidifying radioactive wastes comprising the steps of substituting the atmosphere inside a container packed with radioactive waste with a condensable vapor, pouring a matrix material into said container and thereafter condensing said vapor. T... | 09/03/1991 |
| 4950426 | Granular fill material for nuclear waste containing modules A granular fill material is disclosed for use in a storage module for the storing of nuclear and hazardous waste materials. The waste materials are packaged in a waste container which is in turn deposited within the storage module, thereby creating a void... | 08/21/1990 |
| 4931222 | Process for treating radioactive liquid waste containing sodium borate and solidified radioactive waste The present invention provides drying and pulverization of a radioactive liquid waste containing sodium borate as a main component by heating, where the liquid waste is heated, dried and pulverized to substantially crystalline, homogeneous powder of sodiu... | 06/05/1990 |
| 4906408 | Means for the conditioning of radioactive or toxic waste in cement and its production process A process for conditioning radioactive or toxic waste which can contain boron in a cement-based matrix comprises mixing the waste in a drum in the presence of water with non-aluminous cement, aluminous cement and optionally a siliceous compound and/or a b... | 03/06/1990 |
| 4793947 | Radioactive waste treatment method The present invention relates to a method and an apparatus for producing a waste package of radioactive waste containing particles of radioactive waste material of low modulus of elasticity, particles of radioactive waste material of high modulus of elast... | 12/27/1988 |
