Quotables
"The abolishment of pain in surgery is a chimera. It is absurd to go on seeking it...knife and pain are two words in surgery that must forever be associated in the consciousness of the patient."
Dr. Alfred Velpeau, French surgeon ; 1839
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7648687 | Method of purifying barium nitrate aqueous solution Purification techniques have been developed for ceramic powder precursors, e.g., barium nitrate. These techniques can be performed using one or more of the following operations: (1) removal of impurities by precipitation or coprecipitation and separation usin... | 01/19/2010 |
| 7360967 | Solubilization and disposal of radioactive scale and sludge A process to transform solid, low-level, radioactive waste produced from oil and gas production into a form that may be safely disposed of, such as by re-injection into geologic formations in the Earth. ... | 04/22/2008 |
| 7291316 | Cesium and strontium extraction using a mixed extractant solvent including crown ether and calixarene extractants A mixed extractant solvent including calix[4]arene-bis-(tert-octylbenzo)-crown-6 (“BOBCalixC6”), 4′,4′,(5′)-di-(t-butyldicyclo-hexano)-18-crown-6 (“DtBu18C6”), and at least one modifier dissolved in a diluent. The mixed extractant solvent may be used t... | 11/06/2007 |
| 7182930 | Methods of fabricating barium titanate powders A method of fabricating barium titanate powders uses titanium tetrachloride and barium hydroxide as reactants in a reaction solution. The pH value of the reaction solution is adjusted to strongly alkaline range by adding potassium hydroxide. Nitrogen is charged into... | 02/27/2007 |
| 7157022 | Multivalent metal ion extraction using diglycolamide-coated particles A separation medium, a method for using that separation medium and an apparatus for selectively extracting multivalent cations such as pseudo-lanthanide, prelanthanide, lanthanide, preactinide or actinide cations from an aqueous acidic sample solution is described. ... | 01/02/2007 |
| 7122164 | Niobate-based octahedral molecular sieves Niobate-based octahedral molecular sieves having significant activity for multivalent cations and a method for synthesizing such sieves are disclosed. The sieves have a net negatively charged octahedral framework, comprising niobium, oxygen, and octahedrally coordin... | 10/17/2006 |
| 7101484 | Sr-90/Y-90 radionuclide generator for production of high-quality Y-90 solution A process for purifying a stock Sr-90 solution containing stable and radioactive impurities, holding the purified Sr-90 solution for Y-90 ingrowth, and subsequently extracting the Y-90 from the Sr-90/Y-90 solution. The stock solution is sequentially passed through t... | 09/05/2006 |
| 7048857 | Method and apparatus for metal removal ion exchange The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing solid particle... | 05/23/2006 |
| 7041262 | Method for separating metal ions A method for separating metal ions, which comprises adding a selective capturing agent to an aqueous solution containing plural types of metal ions, said selective capturing agent being a cyclic compound and forming a complex with metal ions having ion radii suitabl... | 05/09/2006 |
| 7037482 | Solvent extraction of a halide from a aqueous sulphate solution A method of extracting a halide and sulphate from an aqueous sulphate solution, such as a zinc sulphate solution, comprises subjecting the solution to solvent extraction to extract halide and sulphate from the solution and controlling the amount of sulphate extracte... | 05/02/2006 |
| 6709642 | Calixarene acetamido derivatives, preparation and use thereof for extracting strontium The invention concerns derivatives of calixarene having the formula: in which: R1 represents various hydrocarbon groups, R2 and R3 represent an alkyl, cycloalkyl or aryl gro... | 03/23/2004 |
| 6692709 | Preparation and use of organic extractant for recovery of metal ions from aqueous solutions A process for the extraction of metals from an aqueous solution of metals in the form of their metal ions. The preparation and use of an efficient organic extractant and also the recovery from the organic extractant of the metal ions. A process for prepar... | 02/17/2004 |
| 6511603 | Alkaline earth cation extraction from acid solution An extractant medium for extracting alkaline earth cations from an aqueous acidic sample solution is described as are a method and apparatus for using the same. The separation medium is free of diluent, free-flowing and particulate, and comprises a Crown ... | 01/28/2003 |
| 6270737 | Extraction processes and solvents for recovery of cesium, strontium, rare earth elements, technetium and actinides from liquid radioactive waste Cesium and strontium are extracted from aqueous acidic radioactive waste containing rare earth elements, technetium and actinides, by contacting the waste with a composition of a complex organoboron compound and polyethylene glycol in an organofluorine di... | 08/07/2001 |
| 6267936 | Method for effecting solvent extraction of metal ions using hydrocarbon soluble aminomethylene phosphonic acid compounds Solvent extraction of one or more metal ions from an aqueous solution in the presence of hydrocarbon-soluble aminomethylenephosphonic acid derivatives.... | 07/31/2001 |
| 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 calcium compound with the solution of dissolved tantalum to ... | 04/10/2001 |
| 6054105 | Process for the solvent extraction of nickel and cobalt values in the presence of magnesium ions from a solution A process for the extraction of nickel and/or cobalt values from a solution comprises the steps of effecting a cobalt solvent extraction in the presence of magnesium ions with a cobalt extractant to produce a cobalt extractant loaded with cobalt ions and ... | 04/25/2000 |
| 5939038 | Process for removing boron from brines Boron is effectively removed from brine, including lithium-containing brines, by acidifying the brine to a pH of 0.1 to 6.0 and then contacting the brine with an extraction medium comprising at least a diol having 6 to 20 carbon atoms in an aromatic solve... | 08/17/1999 |
| 5925284 | Shaped article and process for preparing the article Applicants have developed a unique process for preparing a shaped article comprising an ion exchange composition and a hydroxy oxide binder. The ion exchange compositions include metallotitanates, metallogermanates, pillared clays and metal phosphonates. ... | 07/20/1999 |
| 5851500 | Removal of uranium contamination from magnesium fluoride slag Magnesium fluoride slag contaminated with metallic uranium or uranium compounds is treated by digestion with potassium hydroxide to soluble potassium fluoride and insoluble magnesium hydroxide. The solid and liquid phases are then separated and the solids... | 12/22/1998 |
| 5810020 | Process for removing nitrogen-containing anions and tobacco-specific nitrosamines from tobacco products There is disclosed a process for denitrifying tobacco materials and removing barium from tobacco materials, comprising mixing an aqueous-immiscible organic solvent containing a crown ether with an aqueous solution containing soluble components from tobacc... | 09/22/1998 |
| 5698169 | Methods and agents for the extraction of cesium and strontium from nuclear waste Methods and agents for extracting cesium and strontium ions from aqueous solutions, including aqueous fission product waste solutions, are disclosed using substituted metal dicarbollide and/or dicarbaextranide ions containing one or more chemical groups t... | 12/16/1997 |
| 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 vinylidene-1,1-diphosphonic acid, are capable of complexing with m... | 10/14/1997 |
| 5666642 | Extraction of cesium and strontium ions from nuclear waste Methods and agents for extracting cesium and strontium ions from aqueous solutions, including aqueous fission product waste solutions, are disclosed using substituted metal dicarbollide ions containing one or more chemical groups that increase solubility ... | 09/09/1997 |
| 5666641 | Preparation and use of polymeric materials containing hydrophobic anions and plasticizers for separation of cesium and strontium Preparation and use of polymeric materials containing hydrophobic anions and plasticizers for extraction of cesium and strontium. The use of polymeric materials containing plasticizers which are solvents for hydrophobic anions such as derivatives of cobal... | 09/09/1997 |
| 5603074 | Preparation and use of tetra-alkyl cobalt dicarbollide for extraction of cesium and strontium into hydrocarbon solvents Preparation and use of tetra-C-alkyl cobalt dicarbollide for extraction of cesium and strontium into hydrocarbon solvents. Tetra-C-alkyl derivatives of cobalt dicarbollide, Co(C2 R2 B9 H9)2- ... | 02/11/1997 |
| 5589071 | Anion-exchange membrane extractor for boric acid separation The present invention relates to an anion-exchange membrane extractor for boric acid separation, which is capable of separating boric acid from the radioactive liquid waste concentrated by evaporation of the radioactive liquid waste produced in the pressu... | 12/31/1996 |
| 5585080 | Method for recovering iron chloride, aluminum chloride and calcium chloride from a leach solution The present invention relates to a method for recovering iron chloride, aluminum chloride and calcium chloride from silicon and ferrosilicon or from residues which contain silicon and/or ferrosilicon and metal chlorides and optionally copper and/or copper... | 12/17/1996 |
| 5500193 | Method for ION exchange based leaching of the carbonates of calcium and magnesium from phosphate rock This invention relates to the extraction of carbonates of magnesium and/or calcium with a strong hydrogen form cation-exchange resin from a phosphate rock composition in an aqueous slurry, wherein the phosphate rock and the resins have been classified to ... | 03/19/1996 |
| 5443731 | Process for extracting technetium from alkaline solutions A process for extracting technetium values from an aqueous alkaline solution containing at least one alkali metal hydroxide and at least one alkali metal nitrate, the at least one alkali metal nitrate having a concentration of from about 0.1 to 6 molar. T... | 08/22/1995 |
| 5409680 | Purification of aqueous alkali metal chlorate solutions A process for removing alkaline earth metal impurities (e.g. calcium and magnesium ions) from an aqueous alkali metal chlorate solution which includes adding sufficient alkali metal carbonate or hydroxide or both to the impure solution to raise the pH to ... | 04/25/1995 |
| 5399322 | Selective recovery of dissolved metals and preparation of metal salt products Discussed is a process for recovering metals and metal-containing products, such as a nickel sulfate product, from aqueous feed solutions comprising two or more dissolved metals. A selected metal is isolated and in a purified form in an aqueous raffinate ... | 03/21/1995 |
| 5368736 | Process for the separation and purification of yttrium-90 for medical applications An extraction chromatographic method for the preparation of 90 Y of high chemical and radiochemical purity is disclosed. After an initial purification of a 90 Sr stock solution and a suitable period of 90 Y ingrowth, the s... | 11/29/1994 |
| 5344623 | Process for the extraction of strontium from acidic solutions The invention is a process for selectively extracting strontium values from aqueous nitric acid waste solutions containing these and other fission product values. The extractant solution is a macrocyclic polyether in an aliphatic hydrocarbon diluent conta... | 09/06/1994 |
| 5332531 | Extracting metal ions with diphosphonic acid, or derivative thereof Thermodynamically-unstable complexing agents which are diphosphonic acids and diphosphonic acid derivatives (or sulphur containing analogs), like carboxyhydroxymethanediphosphonic acid and vinylidene-1,1-diphosphonic acid, are capable of complexing with m... | 07/26/1994 |
| 5330731 | Process for separation of zirconium-88, rubidium-83 and yttrium-88 A process for selective separation of strontium-82 and strontium-85 from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, passing the fi... | 07/19/1994 |
| 5282938 | Process for recovery of trace metals and salts from waste combustion residues A method for the continuous treatment of air pollution control residues from various resource recovery systems whereby the air pollution control residue is treated with a dilute salt extracting solution at a pH chosen to maximize the recovery of lead, for... | 02/01/1994 |
| 5266282 | Selective liquid/liquid extraction of yttrium from other rare earths values Yttrium is selectively separated from other rare earth values by contacting a mixed aqueous solution thereof that contains nitrate ions with a water-immiscible organic phase which includes a selective extractant for such other rare earth values, whereby s... | 11/30/1993 |
| 5225173 | Methods and devices for the separation of radioactive rare earth metal isotopes from their alkaline earth metal precursors Methods and devices for the separation of a radioactive rare earth metal isotopes or a radioactive isotope of yttrium or scandium from their alkaline earth metal precursors with ionizable dibenzo ether derivatives.... | 07/06/1993 |
| 5190735 | Recovery of germanium-68 from irradiated targets A process for selective separation of germanium-68 from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, contacting the first ion-contai... | 03/02/1993 |
