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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 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 least one of these components is not used in the form of a solution, ... | 05/01/2007 |
| 7179566 | Positive electrode active material for secondary cell, positive electrode for secondary cell using same, and secondary cell A cathode active material for a secondary battery including a lithium-manganese composite oxide having a spinel structure and represented by the following general formula (I), Lia(MxMn2-x-y-zYyAz)(O4-w | 02/20/2007 |
| 7090722 | Acid-reactive dental fillers, compositions, and methods Acid-reactive dental fillers, and methods of making and using such fillers, are disclosed. The acid-reactive dental fillers include a trivalent metal, oxygen, fluorine, an alkaline earth metal, and, optionally, silicon. The acid-reactive dental fillers are preferabl... | 08/15/2006 |
| 6949233 | Method of preparing positive active material for rechargeable lithium batteries A method for preparing a positive active material for a rechargeable lithium battery is provided. In this method, a lithium source, a metal source, and a doping liquid including a doping element are mixed and the mixture is heat-treated. ... | 09/27/2005 |
| 6767665 | Method for producing molten salts with an extruder and use of the molten salts The invention relates to a method for producing molten salts and their mixings, using an extruder. The starting materials are melted and reacted and the products of the reaction are then guided via a column with alkali salt. ... | 07/27/2004 |
| 6428778 | Process for the synthesis of finely divided antiperspirant active ingredient suspensions A process for synthesis of finely divided antiperspirant suspensions includes providing an antiperspirant salt consisting essentially of an Al salt which is effective as an antiperspirant and which is described by an empirical formula as follows: Al(OH)( | 08/06/2002 |
| 6406677 | Methods for low and ambient temperature preparation of precursors of compounds of group III metals and group V elements Processes are provided for preparation of precursors of Group III-V compounds, i.e., nitrides, phosphides, arsenides, antimonides and bismuthides of boron, aluminum, gallium and indium. The precursors are easily converted, e.g., by thermal decomposition, ... | 06/18/2002 |
| 6350424 | Low-melting potassium fluoroaluminate The production of a potassium fluoroaluminate having a low melting point, which can be used as a flux when soldering aluminum. The potassium fluoroaluminate is prepared in an aqueous medium from aluminum hydroxide, hydrogen fluoride and potassium hydroxid... | 02/26/2002 |
| 6221129 | Process for preparing flux suitable for soldering light metals such as aluminum A flux which contains irreversibly dehydrated K2 AlF5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and ... | 04/24/2001 |
| 6207125 | Recycling of flux material Flux residues from aluminium soldering fluxes composed of alkali metal metallates, especially fluoroaluminates of the alkali metals, in particular potassium and cesium, can be recycled by adding them to the reaction mixture used for the production of hydr... | 03/27/2001 |
| 6060031 | Method for neutralizing acid gases from laser exhaust The device and method of the invention provide a neutralizing compound that reacts with acid gases generated in laser exhaust to yield an insoluble non-toxic powder.... | 05/09/2000 |
| 6004697 | Modified lithium vanadium oxide electrode materials products and methods A method of improving certain vanadium oxide formulations is presented. The method concerns fluorine doping formulations having a nominal formula of LiV3 O8. Preferred average formulations are provided wherein the average oxidation s... | 12/21/1999 |
| 5985233 | Low-melting potassium fluoroaluminate The production of a potassium fluoroaluminate having a low melting point, which can be used as a flux when soldering aluminum. The potassium fluoroaluminate is prepared in an aqueous medium from aluminum hydroxide, hydrogen fluoride and potassium hydroxid... | 11/16/1999 |
| 5980650 | Flux suitable for soldering light metals such as aluminum A flux which contains irreversibly dehydrated K2 AlF5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and ... | 11/09/1999 |
| 5968288 | Method for the preparation of a soldering flux A method for the preparation of potassium salts of complex aluminum fluorides which can be used in particular as a flux in particular for soldering lightweight metallic materials. In the method a potassium compound is added to aqueous fluoroaluminic acid,... | 10/19/1999 |
| 5955064 | Enhanced efficacy stable antiperspirant active solution and method of making same An enhanced antiperspirant active having improved stability and a process for preparing the enhanced antiperspirant active solution are disclosed, the process comprises blending an enhanced basic aluminum chlorohydrate antiperspirant active having a peak ... | 09/21/1999 |
| 5814291 | Simplified synthesis of anion intercalated hydrotalcites The present invention is one-step method for synthesizing a synthetic anion intercalated hydrotalcite material. The method comprises reacting an aluminum source with a magnesium source in the presence of an inorganic acid of the anion to be intercalated, ... | 09/29/1998 |
| 5663478 | Recovery of aluminum and/or fluoride values from used aluminum chlorofluorides A process is disclosed for treating used aluminum chlorofluoride catalyst either alone or mixed with organics. It involves forming a solution of the catalyst in water or an aqueous acid and then adjusting the pH and/or composition of the aqueous phase for... | 09/02/1997 |
| 5460795 | Crystalline phases of AlFk (OH)3-k and HAlF4 New crystalline phases of the fluoroaluminum compound AlFk (OH)3-k and processes for their preparation and conversion to conventional phases, as well as isolation of solid HAlF4 are disclosed.... | 10/24/1995 |
| 5417954 | Phases of NH4 AlF4 and AlF3 New crystalline phases of the fluoroaluminum compounds NH4 AlF4 and AlF3 and processes for their preparation are disclosed.... | 05/23/1995 |
| 5393509 | Crystalline phases of Alfk (OH)3-k and HAlF4 New crystalline phases of the fluoroaluminum compound AlFk (OH)3-k and processes for their preparation and conversion to conventional phases, as well as isolation of solid HAlF4 are disclosed.... | 02/28/1995 |
| 5318764 | Processes of producing potassium fluoroaluminates Potassium tetrafluoroaluminate and potassium hexafluoroaluminate have been produced by three new processes: (a) by reacting alumina trihydrate with freshly produced, hot, solvated potassium fluoride or potassium bifluoride solution in presence of stoichio... | 06/07/1994 |
| 5242669 | High purity potassium tetrafluoroaluminate and method of making same An improved method of making high quality potassium tetrafluoroaluminate. Hydrofluoric acid is added to high purity aluminum metal powder to form aluminum fluoride in solution. Nitric acid is added to this solution whereby impurities in the solution disso... | 09/07/1993 |
| 5045300 | Preparation of complex aluminum fluorides A process comprising the reaction of an amine.aluminum trichloride complex and a bifluoride compound to produce an aluminum fluoride compound. Exemplary processes include the reaction of AlCl3.N(CH2 CH3) and NH4... | 09/03/1991 |
| 4940477 | Method for synthesizing topaz The present invention is directed to a method for synthesizing fluorine-containing, aluminosilicate crystals having a stoichiometry approximating that of topaz. The method comprises three basic steps: (1) vapors of a readily-oxidizable compound of silicon and ... | 07/10/1990 |
| 4692323 | Process for separation of magnesium-based, and possibly fluorine-and aluminum-based impurities from a wet-produced phosphoric acid The invention concerns a process for separating magnesium-based impurities contained in a wet-process produced phosphoric acid. This process comprises adding an ammonium compound R(NH4) soluble in the said phosphoric acid, and, where called for... | 09/08/1987 |
| 4640828 | Separation of dissolved substances from wet process phosphoric acid A process for separating and removing substantial amounts of magnesium and other ion impurities from wet process phosphoric acid of 35-45% P2 O5 content is provided. The process steps comprise: (a) heating the acid while maintaining ... | 02/03/1987 |
| 4639359 | Process of removing cationic impurities from wet process phosphoric acid A method of removing aluminum, magnesium, iron and other impurities from wet process phosphoric acid is provided. The method comprises partially ammoniating the acid and reacting the acid with a fluoride ion donating compound to precipitate aluminum- and ... | 01/27/1987 |
| 4590054 | Process for preparing poly(tetramethylene ether) glycol The color level of poly(tetramethylene ether) glycol made by polymerizing tetrahydrofuran using fluosulfonic acid as the catalyst is significantly lower if the fluosulfonic acid contains no more than about 1200 ppm of iron sulfites.... | 05/20/1986 |
| 4567027 | Process for defluorinating an acid sulphate solution A process for defluorinating a solution of a sulphate of Zn, Ni, Cd, Mn and/or Mg, in which Al3+ and PO43- ions are added to the solution, then the solution is neutralized up to a pH higher than 4 and lower than that one... | 01/28/1986 |
| 4554144 | Removal of magnesium and/or aluminum values from impure aqueous phosphoric acid Magnesium and aluminum impurities are removed from aqueous phosphoric acid by treatment with a fluorine material and an alkali metal containing material in such a manner that the atomic ratio of fluorine to aluminum is adjusted so that it is greater than ... | 11/19/1985 |
| 4430311 | Alumina compounds in ion exchange resins Formation of hydrous alumina in the reticules of a weak-base anion exchange resin, wherein AlCl3 has been precipitated as hydrous alumina by reaction with ammonia, is improved by employing a subsequent treatment with HCl or with NH4 ... | 02/07/1984 |
| 4428920 | Process of producing potassium tetrafluoro aluminate Potassium tetrafluoro aluminate of a melting point not exceeding 575° C. is produced by reacting an aqueous solution of fluoro aluminum acid with an aqueous solution of a potassium compound, especially of potassium hydroxide, the amount of potassium in s... | 01/31/1984 |
| 4351814 | Hydrotalcites having a hexagonal needle-like crystal structure and process for production thereof Fibrous hydrotalcites having a hexagonal needle-like crystal structure. The fibrous hydrotalcites are produced by contacting a basic magnesium compound having a needle-like crystal structure and expressed by the following formula (2) wherein An... | 09/28/1982 |
| 4308244 | Process for producing fluorine compounds and amorphous silica Hydrofluoric acid and/or other fluorine compounds are recovered by reacting fluosilicic acid with a sodium-containing compound to form an alkaline aqueous slurry comprising precipitated amorphous silica and dissolved sodium fluoride. The precipitated amor... | 12/29/1981 |
| 4251501 | Process of preparing high purity cryolite from fluoride solution containing dissolved silica A process of precipitating cryolite from a reaction solution given by mixing a sodium aluminate solution with a fluoride solution containing silica dissolved therein as impurity at reaction temperatures above 60° C. To reduce silica content in the precip... | 02/17/1981 |
| 4226842 | Preparation of crystalline cryolite An improved process for the preparation of crystalline cryolite having a molar ratio Na:Al of 2.9:1 to 3.0:1, by reacting aqueous solutions of aluminum fluoride with at least a stoichiometric amount of sodium fluoride in aqueous solution, while heating, i... | 10/07/1980 |
| 4213945 | Process and apparatus to purify waste industrial gases Industrial waste gases containing sulfur dioxide, hydrogen fluoride, hydrochloric acid and sulfur trioxide are treated within a reaction tank in a first stage with a solution containing ammonium ions to increase the dew point of the gases. The gases are t... | 07/22/1980 |
| 4200622 | Purification of ammonium fluoride solutions In the purification of an ammonium fluoride solution containing silicic acid by adding iron (III) ions and precipitating the iron (III) ions at a pH above 8.5 and a concentration of free ammonia in the solution of more than about 1% by weight, the silicic... | 04/29/1980 |
| 4169132 | Tris-tetrafluorammonium hexafluoraluminate and its method of preparation Tris-tetrafluorammonium hexafluoraluminate, (NF4)3 AlF6, a new compound, is synthesized by forming a mixture of solid aluminum trichloride in a solution of a molar excess tetrafluorammonium bifluoride in anhydrous hydrogen... | 09/25/1979 |
