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| Number | Title | Issue Date |
| 7892298 | Method for producing high purity caustic potash The present invention contemplates for providing a producing method which can give highly pure caustic potash in a relatively simple process, in response to the above-described demand for increased high purity in caustic potash. A method to give highly pure c... | 02/22/2011 |
| 7186394 | Retarding agents for preparing purified brine The invention relates to a process to produce brine of improved purity wherein a salt source, contaminated with sulphate ions and alkaline (earth) metal ions, is dissolved in water in the presence of an effective amount of a retarding agent comprising at least one l... | 03/06/2007 |
| 7127913 | Crystallisation of materials from aqueous solutions The invention is directed to a process for recovering a crystalline material from an aqueous solution, which solution also contains organic contaminants, in which process the material is crystallised from the aqueous solution by freeze crystallising at a eutectic fr... | 10/31/2006 |
| 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 |
| 6896807 | Capacitor electrolyte recovery A method for recovering and recycling expensive and hazardous components from capacitors containing an electrolyte salt dissolved in an aprotic organic solvent. The method includes disintegrating a plurality of capacitor casings and their contents into fragments and... | 05/24/2005 |
| 6890509 | Process for recovery of low sodium salt from bittern A new process for recovery of Low Sodium Salt from bittern has been described in the present invention, the said process comprising desulphatation of bittern (by-product of salt industry), evaporation of bittern in solar pans and processing of solid mixture with wat... | 05/10/2005 |
| 6649027 | Water reclamation system A water reclamation system for a closed environment includes a mixer that receives brine. A processor is downstream of the mixer, with the processor distilling substantially salt-free water from the brine in the substantial absence of salt crystallization... | 11/18/2003 |
| 6500216 | Method and apparatus for desalinating sea water, natural salt and fresh water A method and an apparatus of producing natural salt or fresh water by treating sea water in an extremely short period of time and with high efficiently. The distilled water and salt components are treated for expediting crystallization of the salt compone... | 12/31/2002 |
| 6478828 | Process for the crystallization of an inorganic substance A process for crystallization of an inorganic substance includes preparing a supersaturated solution of the inorganic substance to be crystallized in a solvent which is a liquid; forcing a stream of the supersaturated solution upwardly through successivel... | 11/12/2002 |
| 6267789 | Method for enriching raw salt Process for enriching crude salt, in which the crude salt is ground and then cooled in a saturated aqueous sodium chloride solution, to a temperature below the anhydrous sodium chloride to sodium chloride dihydrate transition temperature, a stock of a pow... | 07/31/2001 |
| 6210803 | Method for the production of a granulate for hemodialysis The invention relates to a method for the manufacture of an electrolyte and acetic acid granulate for making a hemodialysis solution, the granulate comprising the electrolytes potassium chloride, calcium chloride and magnesium chloride, and the method com... | 04/03/2001 |
| 6027607 | Salt extraction process and device A process for extracting salt from brine contained in at least one open evaporation basin. At least part of the brine is heated in a heating unit located outside the evaporation basis and returned to the evaporation basin. The heating unit is driven by wa... | 02/22/2000 |
| 5984981 | Salt making method and apparatus A salt making method comprising putting a crude salt-water mixture (5) comprising crude salt or rock salt and bittern in a vessel (1), blowing the air from a pipe (7) into the mixture (5) with a pump (9), crystallizing the component salt out of the mixtur... | 11/16/1999 |
| 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 |
| 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 |
| 5651796 | Method for producing low bulk density hollow fine powder of alkali metal compound A low bulk density hollow fine powder of alkali metal compound can be produced from an aqueous solution of the compound by one step. The method for producing a low bulk density hollow fine powder of alkali metal compound according to the present invention... | 07/29/1997 |
| 5478515 | Salt block release agents A water soluble dicarboxylic acid acts as a mold release agent for salt blocks when it is sprayed as a fine powder into the block press mold box just prior to a charge of salt. The acid has from 6 to 10 carbon atoms; adipic acid is a preferred release age... | 12/26/1995 |
| 5474581 | Method for producing an aqueous sodium chloride solution and use thereof Method for producing an industrial aqueous sodium chloride solution (22) in which an aqueous solution of sodium chloride (20) containing polyvalent metals and constituting a mother liquor obtained from the precipitation (14) of hydroxides of said metals f... | 12/12/1995 |
| 5447543 | Process for crystallizing inorganic salts The present invention is an improved method for crystallizing inorganic salts. The inorganic salts that are suitable for this process are characterized by the fact that they form isothermic or polythermic concave solubility curves. Each concave solubility... | 09/05/1995 |
| 5395559 | Granulated ammonium nitrate products A process for the production of explosives grade ammonium nitrate prill (EGAN) comprises the steps of (A). producing seed ammonium nitrate prill as substantially monosized prills; and then (B). fattening using melt/solution of ammonium or mixed nitrates, with ... | 03/07/1995 |
| 5366514 | Salt plant evaporation This invention relates to an evaporative salt plant installation including methods of operation and apparatus which produce high purity salt economically and in high yield comprising the combination of a gas turbine which drives a vapor compressor, whose ... | 11/22/1994 |
| 5330618 | Process for separating dissolved solids from a liquid using an anti-solvent and multiple effect evaporators A process and system for treating aluminum salt cake containing water soluble halide salts by contacting the salt cake with water to dissolve water soluble halide salts forming a saturated brine solution. Transporting a portion of about 25% of the saturat... | 07/19/1994 |
| 5300123 | Method of reforming soluble salts to effect purification and increase crystal size thereof A method of reducing soluble and insoluble impurity levels while increasing the size of water soluble salt crystals which includes an initial step of fine grinding followed by regrowth in a saturated solution of the salt subjected to agitation.... | 04/05/1994 |
| 5296000 | Process and equipment for crystallizing an inorganic substance Process and installation for crystallising an inorganic substance in a fluidised bed of crystals (14), which is generated by subjecting a solution supersaturated in the substance to be crystallised to an ascending circulation across a distributor (12), lo... | 03/22/1994 |
| 5221528 | Process for the preparation of sodium chloride In a purification process for brine, impurities such as calcium, magnesium and/or sulphate are precipitated by the addition of calcium hydroxide (Ca(OH)2) and sodium carbonate (Na2 CO3). Following NaCl crystallization by e... | 06/22/1993 |
| 5169406 | Method and a device for preparing brine The invention concerns a method of preparing brine by dissolving salt in water, the salt containing sodium chloride but also calcium sulfate and/or other soluble impurities with a slower dissolution rate than sodium chloride, wherein the salt is supplied ... | 12/08/1992 |
| 5021079 | Sodium chloride in novel crystal form and aqueous solution containing the same Sodium chloride in a flat tetrahedronal crystal form and an aqueous solution containing (i) sodium chloride in a flat tetrahedronal crystal form or sodium chloride capable of converting to a flat tetrahedronal crystal form and (ii) iron chloride.... | 06/04/1991 |
| 4950310 | Process for the preparation of crystalline sheet sodium silicates X-ray crystalline sodium silicates having a sheet structure and an SiO2 :Na2 O molar ratio of 1.9 to 3.5 are prepared by dissolving an X-ray crystalline sodium silicate having a sheet structure and an SiO2 /Na2 ... | 08/21/1990 |
| 4797981 | Process for the production of salt Process for the production of salt in which sodium chloride is crystallized in the form of spheres by evaporation of a sodium chloride brine and the spheres obtained are then broken up. The salt produced by the process is particularly suitable for the foo... | 01/17/1989 |
| 4747917 | Scale-free process for purifying concentrated alkali metal halide brines containing sulfate ions as an impurity A process for reducing sulfate ion concentrations in an alkali metal halide brine to be electrolyzed in an electrolytic cell comprises feeding the alkali metal halide brines to a reaction zone containing a slurry of gypsum crystals having a concentration ... | 05/31/1988 |
| 4655941 | Method of preparing mixed electrolyte powder for bicarbonate dialysis and powder mixture formed A method of producing a mixed electrolyte powder having an electrolyte ion composition suited for use in preparing a dialyzing fluid for perfusing artificial kidney systems for bicarbonate dialysis, which method comprises a step of pulverizing the whole o... | 04/07/1987 |
| 4563340 | Process for the secondary obtention of sodium carbonate from FLP waste liquor This invention is related to a process for the secondary obtention of sodium carbonate from a waste liquor (known as FLP waste liquor) containing principally sodium chloride, ammonium bicarbonate, ammonium chloride and carbon dioxide, which is obtained in... | 01/07/1986 |
| 4548614 | Solvent precipitation of salt A low boiling, water soluble organic solvent is added to a saturated brine to thereby reduce the salt solubility of the brine and cause precipitation of the salt. The precipitated salt is filtered out and dried. The remaining brine-solvent mixture is dist... | 10/22/1985 |
| 4547197 | Treatment of brine elutriate The invention relates to the treatment of brine and more particularly the treatment of the brine elutriate drawn off after evaporation of the brine at an elevated temperature to separate some of the sodium chloride thereon. The crude brine normally contai... | 10/15/1985 |
| 4541832 | Process for producing high purity sodium chloride from potassium mineral flotation tailings The invention relates to a process for recovering from potassium mineral flotation tailings sodium chloride of sufficiently high purity to make it suitable for industrial use, characterized by comprising the following stages: (a) washing said flotation ta... | 09/17/1985 |
| 4533536 | Process for the manufacture of potassium sulphate by treating solutions containing magnesium chloride and potassium chloride Process for the manufacture of potassium sulphate from solutions containing magnesium chloride and potassium chloride from solutions, more particularly from mother liquors issuing from the treatment of carnallite. According to this process sodium sulphate... | 08/06/1985 |
| 4334886 | Method of manufacturing table salt A method of manufacturing table salt effectively containing an efficient amount of the minerals from the sea water by using not fuel or electric energy but natural energy only. The method comprising the steps of infiltrating and flowing down the sea water... | 06/15/1982 |
| 4306880 | Recovering by-products from sea water brines and the like The improved production of sodium sulfate, potassium sulfate and other valuable salts from salt plant bitterns or the like wherein initial reduction in sulfate ion concentration yields salt cake and greatly facilitates the selective recovery of potassium ... | 12/22/1981 |
| 4276117 | Process of treating potassium chloride brine by evaporation and crystallization Disclosed is an improved method of producing potassium chloride by concentrating a brine thereof with respect to potassium chloride by multiple stage evaporation conducted at progressively higher temperatures, thereby precipitating other salts and thereaf... | 06/30/1981 |
| 4224035 | Method of separating salts from solution Disclosed is an improved method of separating a first salt and a second salt from an aqueous solution containing both salts and salt impurities, where the solubility of the first salt increases more with increasing temperatures than the solubility of the ... | 09/23/1980 |
