Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 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 |
| 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 |
| 6986878 | Method of producing potassium sulfate via cation exchange A process for producing potassium sulfate from potash and sodium sulfate, which involves providing a source of sodium sulfate and passing the sodium sulfate through cationic exchanger. Eluted potassium sulfate containing sodium sulfate is reacted with potash to form... | 01/17/2006 |
| 6936175 | Zirconium phosphate, hafnium phosphate and method of making same The invention relates to zirconium phosphate of H form which is characterized by a 31P NMR spectra comprising peaks at −4.7 ppm, −12.8 ppm and −17.0 ppm (all peaks being in a range of ±0.5 ppm). Also featured is a Na form of the material. The zirco... | 08/30/2005 |
| 6911188 | Production of two alkali metal salts by a combined ion exchange and crystallization process The invention relates a process for producing an alkali metal nitrate and an alkali metal phosphate in the same process from a phosphate raw material and a nitrate raw material comprising the steps of: a) reacting the phosphate raw... | 06/28/2005 |
| 6777511 | Process for producing poly (meth) acrylates having reduced metal content An industrially excellent process for producing a poly(meth)acrylate having a reduced metal content which comprises contacting a mixture of a poly(meth)acrylate and an organic solvent with an acidic aqueous solution, such as an aqueous solution obtained by dissolvin... | 08/17/2004 |
| 6736958 | Ion sensing method The present invention allows the determination of trace levels of ionic substances in a sample solution (ions, metal ions, and other electrically charged molecules) by coupling a separation method, such as liquid chromatography, with ion selective electrodes (ISE) p... | 05/18/2004 |
| 6566561 | Fluoro-alcohol phase modifiers and process for cesium solvent extraction The invention relates to a class of phenoxy fluoro-alcohols, their preparation, and their use as phase modifiers and solvating agents in a solvent composition for the extraction of cesium from alkaline solutions. These phenoxy fluoro-alcohols comply with ... | 05/20/2003 |
| 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 for the implementation of this method. The method of the in... | 02/11/2003 |
| 6296679 | Method for hydrocarbon steam reforming In a process for hydrocarbon steam reforming, a primary reformed gas is produced from a mixed gas of hydrocarbon and steam with use of a primary reforming means including an external combustion type of reforming furnace. A secondary reforming reaction of ... | 10/02/2001 |
| 6280693 | Composition for the recovery of lithium values from brine and process of making/using said composition The present invention is a composition comprising pellets, each of said pellets consisting essentially of an integral mass of polycrystalline material of randomly disposed crystals of hydrated alumina infused with an amount of LiX to produce LiX/Al(OH) | 08/28/2001 |
| 6274105 | Process for producing high-purity potassium salts The present invention relates to a new selective process for producing high-purity potassium nitrate or potassium phosphate. The process uses a liquid agricultural or fermentation by-product, such as molasses, vinasse or potato thick juice as its potassiu... | 08/14/2001 |
| 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 |
| 6241893 | Water filtration media, apparatus and processes An amorphous potassium aluminosilicate filtration media which may be mixed with activated carbon filters water to remove oxygen, chlorines, hardness, alkalinity, ammonia, hydrogen, hydrogen sulfide, sodium sulfite and other contaminants. The particular so... | 06/05/2001 |
| 6207129 | Lithiated manganese oxide The invention is a process which provides a high purity lithiated manganese oxide (Li1+x Mn2-y O4) from chemically made MnO2. The lithiated manganese oxide has an especially effective utility for use as a cathod... | 03/27/2001 |
| 6174503 | Calixarene crown ether solvent composition and use thereof for extraction of cesium from alkaline waste solutions A solvent composition and corresponding method for extracting cesium (Cs) from aqueous neutral and alkaline solutions containing Cs and perhaps other competing metal ions is described. The method entails contacting an aqueous Cs-containing solution with a... | 01/16/2001 |
| 6156282 | Crown calix[4]arenes, method of preparation and use for selective extraction of caesium The invention relates to new calixarenes of formula: ##STR1## in which R1 represents a crown ether chain that includes at least two aryl or cycloalkyl rings, R2 is a hydroxyl or alkoxy group, or the two R2 groups together ... | 12/05/2000 |
| 6120927 | Method of recovering lithium from batteries Disclosed is a method of recovering lithium from a battery containing lithium such as a lithium ion secondary battery. The lithium-containing member of the battery is dissolved with an acidic liquid, and an alkaline material is added to the obtained lithi... | 09/19/2000 |
| 6110377 | Process for recovering the sodium contained in industrial alkaline waste The invention concerns a process that uses an ion exchanger resin to recover the sodium contained in industrial alkaline waste and, in particular, in the "red mud" and sodium effluents coming from the manufacture of aluminum hydrate according to the Bayer... | 08/29/2000 |
| 6022992 | Acid-salt metathetic process A cation exchange membrane mediated acid-salt metathetic process. An aqueous salt solution is placed into a first compartment on one side of the membrane together with an organic amine extractant of limited water miscibility, and an aqueous acid solution ... | 02/08/2000 |
| 5980717 | Recovery process in a pulp mill A substantial and increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the spent liquor entering the recovery boiler. Chloride and potassium increase the stickiness of carryover deposits and dust parti... | 11/09/1999 |
| 5942084 | Process for the separation of sulphides from pulping liquors using amphoteric resins A process using an amphoteric ion-exchange resin, also known as a "snake-cage polyelectrolyte" resin separates kraft white liquor into sulphide-rich and caustic-rich components. The sulphide-rich component can be used in the initial stage of pulping, pret... | 08/24/1999 |
| 5922171 | Method and apparatus for removing sodium chloride from pulping chemicals using an amphoteric ion-exchange resin Sodium chloride is removed from pulping chemicals used in a Kraft pulping process by the use of a snake-cage polyelectrolyte ion exchange resin, coupled with removal of sulfide prior to treatment, or treatment of chemicals which are already low in sulfide... | 07/13/1999 |
| 5888398 | Composition and process for separating cesium ions from an acidic aqueous solution also containing other ions A crown ether cesium ion extractant is disclosed as is its synthesis. The crown ether cesium ion extractant is useful for the selective purification of cesium ions from aqueous acidic media, and more particularly useful for the isolation of radioactive ce... | 03/30/1999 |
| 5750032 | Removal of lithium from polymer cements Process for removing an alkali metal compound from an acid solution also containing nickel and aluminum compounds, which requires contacting the acid solution first with an ion exchange resin functional to remove the nickel and aluminum compounds from the... | 05/12/1998 |
| 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 |
| 5681477 | Thermally-driven ion-exchange process for lithium recovery Ions (e.g. lithium) can be removed or recovered from brines containing those ions and optionally one or more other ions (e.g. other alkali metal ions) by the use of a temperature-swing, ion-exchange process employing an ion-exchange material. The process ... | 10/28/1997 |
| 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 |
| 5607591 | Bis-crown calix [4]arenes, their preparation process and their use for the selective extraction of cesium and actinides The invention relates to bis-crown calix[4]arenes, their preparation process and their use for the selective extraction of cesium and actinides. Bis-crown calix[4]arenes are in accordance with the formula: ##STR1## in which R1 and R2 | 03/04/1997 |
| 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 |
| 5599516 | Recovery of lithium values from brines Pellets of a polycrystalline hydrated alumina, especially Gibbsite, are infused with LiOH to obtain loadings up to 0.33 mol fraction of LiOH in the LiOH/Al(OH)3. The so-prepared material is useful for mixing with a LiX-containing brine solution... | 02/04/1997 |
| 5547810 | Image forming method with alkali precursor An image forming method comprises the steps of (a) exposing a silver halide photographic light-sensitive material comprising a first support and provided thereon, a photographic component layer comprising a first binder, light sensitive silver halide and ... | 08/20/1996 |
| 5451383 | Lithium recovery In the production of lithium-exchange adsorbents, lithium recovery from spent ion-exchange solutions is achieved with advantageous secondary recovery of lithium from zeolite wash liquor and precipitate salts by ion-exchange means.... | 09/19/1995 |
| 5389349 | Recovery of lithium values from brines Morphologically altered pellets of a polycrystalline hydrated alumina, intercalated with LiX (where LiX is a lithium salt, preferably LiCl), is prepared by contacting the polycrystalline structure with LiX solution carried in NaCl brine, the LiX creating ... | 02/14/1995 |
| 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 |
| 5277883 | Recovery of metal values from aqueous solutions A process is described for recovering metal values, e.g., gallium, contained in an aqueous solution by extraction comprising the steps of contacting the aqueous solution with a water immiscible organic phase comprising a water-insoluble substituted 8-hydr... | 01/11/1994 |
| 5110578 | Continuous production of potassium nitrate via ion exchange Potassium nitrate is produced by contacting nitric acid with a potassium loaded strong cationic exchange resin. In a preferred embodiment, a solution of potassium nitrate and dilute nitric acid is produced in a continuous liquid solid contacting apparatus... | 05/05/1992 |
| 5098679 | Purification of alkali metal hydrosulfite solutions A process for treating an alkali metal hydrosulfite solution which comprises contacting the alkali metal hydrosulfite solution with aluminum in a reaction mixture, and admixing carbon dioxide gas with the reaction mixture to remove dissolved aluminum as a... | 03/24/1992 |
