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...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8168146 | Process for preparing high concentration dispersions of lithium hydroxide monohydrate and of anhydrous lithium hydroxide oils The disclosed technology relates to a dispersion comprising LiOH and/or LiOH.H2O particulates dispersed in an organic medium comprising at least one oil and at least one surfactant, the concentration of LiOH and/or LiOH.H2O particulates in the ... | 05/01/2012 |
| 7858058 | Method for crystallizing soluble salts of divalent anions from brine The invention pertains to removing soluble alkali metal or ammonium salt of a divalent anion from brine comprising following steps: obtaining brine with NaCl-concentration between 150g/L and saturation in the presence or absense of a cyrstal growth inhibitor for NaC... | 12/28/2010 |
| 7361318 | Sodium hydrogencarbonate crystal particles A method for producing sodium hydrogencarbonate crystal particles having a low caking property, which comprises lowering the potassium concentration in sodium hydrogencarbonate crystal particles having a mean particle diameter of from 50 to 500 μm to a level of at ... | 04/22/2008 |
| 7323150 | Methods for recovering at least one metallic element from ore A method for recovering at least one metallic element from ore or other material is described and includes reacting ore or other material with a salt capable of recovering the metallic element from the ore or other material to form a reaction product that includes t... | 01/29/2008 |
| 7179437 | Feeding device and process and feeding system which utilize the feeding device Feeding device for feeding burned lime to a reaction vessel for causticizing a soda liquor to caustic soda. The feeding device, in its upper part, comprises an inlet for a slurry of the burned lime and the soda liquor for formation of said slurry inside said feeding... | 02/20/2007 |
| 7179439 | Method for preparing disodium paraperiodate It is provided that a method for preparing disodium paraperiodate, characterized in that a pH of a reaction mixture which is obtained by reacting sodium iodate, iodic acid or a mixture thereof with sodium hypochlorite using sodium hydroxide is adjusted to the range ... | 02/20/2007 |
| 7172703 | Method of reclaiming a well completion brine solutions using an organic chelant A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and/or non-zinc heavy metals; and (ii) calcium and zinc. The chelant is of the formula: ... | 02/06/2007 |
| 7157072 | Cathode composition for lithium batteries and method of preparing the same Provided is a cathode composition for lithium secondary battery that includes a lithium-chromium-titanium-manganese oxide that has the formula Li[Li(1-x)/3CrxTi(2/3)yMn2(1-x-y)/3]O2 where 0≦x≦0.3, 0≦y≦0.... | 01/02/2007 |
| 7144512 | Method of reclaiming brine solutions using an organic chelant A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2 | 12/05/2006 |
| 7077968 | Method for continuously filtering raw brine for use in chlor-alkali electrolysis The method of continuously processing raw brine with a solids content to obtain substantially solids-free pure brine (E) for use in chlor-alkali electrolysis. In this method the raw brine (A) is separated, by means of a decanter (1), into a clear brine (B) wi... | 07/18/2006 |
| 7041268 | Process for recovery of sulphate of potash The present invention is directed to a novel integrated process for the recovery of sulphate of potash (SOP) from sulphate rich bittern. The process requires bittern and lime as raw materials. Kainite type mixed salt is obtained by fractional crystallization of the ... | 05/09/2006 |
| 7037481 | Production of ultra pure salt This invention relates to methods and installations for producing ultra pure sodium chloride salt crystals primarily for use in saturating depleted brine resulting from the electrolytic decomposition of saturated brine in chlor alkali membrane cells for the producti... | 05/02/2006 |
| 7033555 | Low temperature lithiation of mixed hydroxides A low temperature contaminant limiting process for lithiating hydroxides and forming lithiated metal oxides of suitable crystalinity in-situ. M(OH)2 is added to an aqueous solution of LiOH. An oxidant is introduced into the solution which is heated below ... | 04/25/2006 |
| 7014832 | Simultaneous recovery of potassium chloride and KCL enriched edible salt The present invention relates to recovery of industrial grade potassium chloride and low sodium edible salt from bittern as part of an integrated process. The process comprises, mixing low sulphate concentrated feed bittern (a by-product of salt industry) of density... | 03/21/2006 |
| 6864202 | Process for preparing sodium silicate alkali solution depleted of sodium salt and enriched in silica The present invention relates to an improved process for obtaining sodium silicate alkali solution depleted of sodium salt and enriched in silica from a mother liquor recovered after isolation of molecular sieves and more particularly, the present invention relates ... | 03/08/2005 |
| 6758981 | Method and apparatus for by-product removal in a hydrogen generation system A system and method for removing a by-product from a chemical hydride solution is disclosed. The method includes the steps of: (a) withdrawing the chemical hydride solution at a first temperature from the reactor; (b) cooling the chemical hydride solution to a secon... | 07/06/2004 |
| 6699447 | Sodium bicarbonate production from nahcolite A method for producing sodium bicarbonate from a nahcolite deposit comprising injecting water or other aqueous solution at a temperature of at least 250° F. into the deposit, dissolving sodium bicarbonate in the hot water to form a production solution an... | 03/02/2004 |
| 6682713 | Iron sulfides, processes for producing the same, iron sulfide mixture, heavy metal treating agent, and method of treating with the agent Novel iron sulfides having excellent durability and excellent treating properties of heavy metals, processes for producing the iron sulfides, iron sulfide mixture, a heavy metal treating agent containing either of these novel iron sulfides as an effective... | 01/27/2004 |
| 6596252 | Recycling of spent pot linings A process is described for the treatment of spent pot lining material from electrolyte reduction cells, this spent material having a substantial content of cryolite. The spent material is first leached with water at a dilution and a time sufficient to dis... | 07/22/2003 |
| 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 |
| 6503473 | Process for separating solid compound other than lithium hydroxide A process for separating a solid compound other than lithium hydroxide, such as sodium chloride, in which lithium hydroxide is hydrosulfurized by bubbling gaseous hydrogen sulfide through an aprotic solvent, such as a polar organic compound, containing li... | 01/07/2003 |
| 6475458 | Method for formulating food grade sodium bicarbonate There is disclosed a method for formulating food grade sodium bicarbonate by purification of a sodium bicarbonate liquor where an initial saturated feedstock of sodium bicarbonate which contains sodium sulfate as an impurity is filtered to remove the impu... | 11/05/2002 |
| 6426083 | Aqueous borate-containing compositions and their preparation The invention relates to aqueous boron-containing compositions and their preparation. In particular the invention provides self-structured aqueous sodium pentaborate gels. The gels according to the invention may be prepared by reacting boric acid or boric... | 07/30/2002 |
| 6267962 | Compositions and methods of treatment using peat derivatives Novel compositions containing at least one biologically active component derived from peat or similar composition, methods for their preparation and therapeutic uses for a variety of diseases, injuries, and conditions, including wound healing, pain, itch,... | 07/31/2001 |
| 6231822 | Recovering chloride and sulfate compounds from spent potliner A method of recovering chloride and sulfate salts from spent potliner using acid digestion.... | 05/15/2001 |
| 6175051 | Deactivation of metal liquid coolants used in nuclear reactor systems Liquid metal coolants, such as alkali metal used in nuclear reactor systems can be safely deactivated to form a disposable solid waste material. The alkali metal is dissolved in an ammoniacal liquid, such as anhydrous liquid ammonia to form a reaction mix... | 01/16/2001 |
| 6165641 | Nanodisperse transition metal electrodes (NTME) for electrochemical cells Disclosed are transition metal electrodes for electrochemical cells using gel-state and solid-state polymers. The electrodes are suitable for use in primary and secondary cells. The electrodes (either negative electrode or positive electrode) are characte... | 12/26/2000 |
| 6162408 | Process for purifying ash which principally consists of sodium sulphate from a recovery boiler Ash from a recovery boiler is purified by leaching or evaporation-crystallizing contaminants such as, chlorides and potassium salts in water. The leaching or evaporation-crystallizing takes place in an aqueous solution at a temperature that is in the vici... | 12/19/2000 |
| 6113657 | Purification of caustic soda In a process for preparing crystalline NaOH.3.5H2 O, NaOH.3.5H2 O is allowed to crystallize from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated in respect of NaOH.3.5H2 O and the cryst... | 09/05/2000 |
| 6063345 | Method of separating NaCl from a LiCl solution Disclosed is a method of separating NaCl from a NaCl contaminated aqueous LiCl solution involving concentration of the solution, cooling of concentrated solution and separation of the crystallized NaCl. The method is characterized in that the concentratio... | 05/16/2000 |
| 6056813 | Process and system for producing pigments directly from component raw materials without byproducts A process for making white pigment directly from constituent materials without byproducts. The process comprises the steps of inputting three material flows comprising a sulphate source, an alkali source, and an aluminum source. And, recycling and mixing ... | 05/02/2000 |
| 6042622 | Process for crystallization of alkali metal bicarbonate salts Alkali metal bicarbonate salts, e.g., sodium bicarbonate, are crystallized from aqueous solutions thereof in the presence of a crystal growth promoting amount of lecithin or lecithin containing compositions. Alkali metal bicarbonate salts include sodium b... | 03/28/2000 |
| 6017506 | Process for the preparation of periodates Process for the preparation of a sodium paraperiodate wherein an iodine compound is converted into the sodium paraperiodate in the presence of Na+ ions by means of an alkali metal hydroxide and an alkali metal hypochlorite. The iodine compound ... | 01/25/2000 |
| 5976485 | Sodium metabisulfite process Sulfur dioxide is introduced into a solution of sodium sulfite and sodium bisulfite to form sodium bisulfite in a solution having dissolved sulfur dioxide present with a pH between 3.5 and 4.2. The solution is drawn to a cooling crystallizer where an alka... | 11/02/1999 |
| 5895523 | Process for making basic alkali metal sulfate pigments A process is provided for making K2 SO4 3Al2 O3 4S03 +xH2 O or Na2 SO4 3Al2 O3 4SO3 +xH2 O where x is a number from 4 to 12, whi... | 04/20/1999 |
| 5846501 | Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate In order to recover in an environmentally sound and economic manner used hardening shop salts which contain nitrate-nitrite, the salts, comminuted to particle sizes of from 1 to 50 mm, are dissolved in a mixture of nitric acid and hydrogen peroxide withou... | 12/08/1998 |
| 5846290 | Method for the recovery of group IA salts during the treatment of industrial process waste streams A method for the production of Group IA salts during a process for the recycling of industrial waste streams containing Group IA compounds and iron and/or zinc compounds, by heating the waste stream in a reducing atmosphere, treating the exhaust fumes fro... | 12/08/1998 |
| 5769906 | Process for recovering the salt constituents from hardening-shop salt baths The process for environmentally acceptable and economical recovery of chloride salts from hardening-shop used salts utilizing the steps of leaching of the used salt, detoxification of the cyanide and selective crystallization of the individual chloride sa... | 06/23/1998 |
| 5753200 | Sodium metabisulfite process Sulfur dioxide is introduced into a solution of sodium sulfite and sodium bisulfite to form sodium bisulfite in a solution having dissolved sulfur dioxide present with a pH between 3.5 and 4.2. The solution is drawn to a cooling crystallizer where sodium ... | 05/19/1998 |
| 5681447 | Removal of trace metal and metalloid species from brine Process for the removal of heavy metal, metalloid and fluoride species present in trace mounts from aqueous brine of use in the production of chlorine and sodium hydroxide by electrolysis in membrane cells or in chlorate production; particularly to said r... | 10/28/1997 |
