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| Number | Title | Issue Date |
| 8172911 | Process for the treatment of phosphogypsum and in particular of phosphogypsum leachates The present invention describes a process for treating phosphogypsum and in particular the related leachate that comprises the steps of feeding a continuous leachate flow with a dry content of below 5% by weight into a concentration unit heated to a predetermined te... | 05/08/2012 |
| 7247284 | Method and apparatus for regeneration of flue gas scrubber caustic solutions A process to regenerate wet flue gas scrubber purge liquid into NaOH caustic suitable for make-up caustic for the scrubber is disclosed. Further, sulfur is removed from waste effluent in the form of gypsum with the process described herein. Lime is added to the spen... | 07/24/2007 |
| 7200696 | System method structure in network processor that indicates last data buffer of frame packet by last flag bit that is either in first or second position A method and structure for determining when a frame of information comprised of one or more buffers of data being transmitted in a network processor has completed transmission is provided. The network processor includes a plurality of control blocks, one for each da... | 04/03/2007 |
| 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 |
| 6884269 | Continuous method for manufacture of uniform size flake or powder A method and apparatus for continuous fabrication of homogeneous thin flake or powder electrolyte material from inorganic salt, metallic or similar materials or from mixtures of such materials for use in Carbonate Fuel Cell (“CFC”) power plants. Electrolyte prec... | 04/26/2005 |
| 6881231 | Reduction in mineral salt deposition A composition for reducing deposition of a mineral salt from an aqueous supersaturated solution onto a solid surface in contact with the aqueous supersaturated solution which composition comprises a dispersion of either (i) seed crystals of the mineral salt in an aq... | 04/19/2005 |
| 6723139 | Method for recycling fine calcium fluoride powder Process for recycling a composition comprising pulverulent calcium fluoride in the form of micrometric particles comprising: (i) a stage of mixing, in the presence of water, the said composition with pulverulent calcium fluoride (also known as natural spar), ... | 04/20/2004 |
| 6660049 | Process for control of crystallization of inorganics from aqueous solutions Process of crystallization of sodium bicarbonate from solution mined Nahcolite pregnant liquor comprising the use of from about 2 to 100 parts per million of lecithin, introduced full strength, made miscible in water with a soap or detergent, saponified w... | 12/09/2003 |
| 6340373 | Process for recovering and treating of aqueous solutions There is described a method for the treatment and processing of solutions of an organic fluid, water and one or more compounds of alkaline earth metals, alkali metals and metal ions, comprising the following steps: a) conducting a stream (5) consisting of... | 01/22/2002 |
| 6221322 | Strontium nitrate and method for manufacturing same Low-cost, high-purity strontium nitrate that is low in Ba, Na, Ca, Cr, and other impurities and that is suitable for use in airbags or the like is provided. High-purity strontium nitrate having a Ba content of 0.01 wt % or lower, an Na content of 0.005 wt... | 04/24/2001 |
| 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 |
| 5882361 | Method for producing calcium chloride scales In the method, calcium chloride scales (75) are produced on a cooled surface (20), namely through the application of a layer (70) consisting of an aqueous CaCl2 solution (7) to the cooled surface, solidification of the layer and stripping off t... | 03/16/1999 |
| 5853686 | Calcium carbonates of altered crystal habit or morphology and methods for producing same Methods are disclosed in which first and second reactant salts and, optionally, a complexing agent are added to a non-aqueous reaction solvent to form a reaction system. The reactant salts, which are substantially soluble and reactive with each other in w... | 12/29/1998 |
| 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 |
| 5762901 | Stabilized magnesium hydroxide slurry A method for producing a stabilized magnesium hydroxide slurry comprising physically deflocculating the magnesium hydroxide solids in a starting slurry to produce a stabilized magnesium hydroxide slurry. Depending on the chloride level of the starting slu... | 06/09/1998 |
| 5716419 | Process for crystallization of mineral salts Mineral salts, e.g., potassium chloride, are crystallized from aqueous solutions thereof in the presence of a crystal growth promoting amount of lecithin or lecithin containing compositions. Mineral salts include alkali metal and alkaline-earth metal chlo... | 02/10/1998 |
| 5618511 | Process for producing ammonium sulfate from flue-gas scrubber waste liquor A flue-gas scrubbing-liquor regeneration process that is based on contacting N-S compounds contained in a flue-gas scrubbing liquor with a lime/limestone solution in a double draw-off crystallizer under suitable pH conditions for precipitating calcium sal... | 04/08/1997 |
| 5607655 | Olefin polymerization catalyst and precursor therefor A generally dipyramidal-shaped catalyst precursor is prepared by dissolving magnesium dichloride and a suitable alcohol in a suitable solvent and then cooling to obtain a precipitate of the desired shape. The use of the precursor to prepare catalysts and ... | 03/04/1997 |
| 5575923 | Salt basket for crystallizer and method of use in zero liquid discharge industrial facilities An improved salt basket for dewatering solids, particularly salts resulting from evaporation of industrial wastewaters. The salt basket system includes a pressurizable vessel having a screen floor situated above a bottom liquid collection head, an inlet f... | 11/19/1996 |
| 5514201 | Microelement deficiency corrector for farmland and process for preparation thereof A process for forming a microelement deficiency-corrector comprising a mixture of trace elements, in hydrated sulfate form, optionally containing carbonates and including iron, magnesium, manganese and zinc, with the following typical elemental analysis: ... | 05/07/1996 |
| 5514357 | Stabilized magnesium hydroxide slurry A method for producing a stabilized magnesium hydroxide slurry comprising physically deflocculating the magnesium hydroxide solids in a starting slurry to produce a stabilized magnesium hydroxide slurry. Depending on the chloride level of the starting slu... | 05/07/1996 |
| 5455018 | Magnesium chloride particulates having unique morphology and olefin polymerization catalysts supported thereon Crystalline MgCl2 particulates, exhibiting the morphology of substantially regular polyhedra having an even number of from 10 to 18 face surfaces, are well suited as support substrate for olefin polymerization catalysts.... | 10/03/1995 |
| 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 |
| 5439662 | Process for making MgCl2 MgO with narrow granulometric distribution, catalytic components containing the same, process of using such supports to polymerize olefins, and resultant polyolefins A process for the manufacture of MgCl2.MgO with narrow granulometric distribution by treatment of hydrated MgCl2 with an alcohol followed by heat treatment after partial elimination of the alcohol, characterized in that the hydrated ... | 08/08/1995 |
| 5296002 | Rhombohedral calcium carbonate and accelerated heat-aging process for the production thereof A form of calcium carbonate having a blocky rhombohedral crystal structure and properties including a surface area of from about 3 to about 15 m2 g, an average discrete particle size of from about 0.2 to about 0.9 micron, wherein the discrete p... | 03/22/1994 |
| 5281242 | Method for recovering magnesium sulfate products from mixtures of epsomite and halite A simple, efficient and inexpensive method of purifying magnesium sulfate from mixtures of epsomite and halite. The method allows for the preparation of substantially pure magnesium sulfate products. The method generally involves heating a mixture of epso... | 01/25/1994 |
| 5269818 | Rhombohedral calcium carbonate and accelerated heat-aging process for the production thereof A form of calcium carbonate having a blocky[-six-sided] rhombohedral crystal [habit ] structure and [a morphology, with] properties including a surface area of from about 3 to about 15 m2 /g, an average discrete particle size of from about 0.2 ... | 12/14/1993 |
| 5217565 | Contactless heater floating zone refining and crystal growth Floating zone refining or crystal growth is carried out by providing rapid relative rotation of a feed rod and finish rod while providing heat to the junction between the two rods so that significant forced convection occurs in the melt zone between the t... | 06/08/1993 |
| 5211922 | Process for the recovery of values from secondary aluminum dross A process for recovery of metallic aluminum, sodium and potassium chloride and an aluminum oxide-metallic aluminum product from secondary aluminum dross. A secondary aluminum dross feed is separated by particle size into a first dross portion which is wat... | 05/18/1993 |
| 5198200 | Process for the recovery of values from secondary aluminum dross A process for the recovery of metallic aluminum, mixtures of salts, and an aluminum oxide-metallic aluminum product from secondary aluminum dross. The process includes treating the dross with leach water to dissolve the salt content. Magnesium chloride is... | 03/30/1993 |
| 5173088 | Process for preparing crystals of anhydrous sodium sulfide Disclosed is a process for preparing crystals of anhydrous sodium sulfide, the process being characterized in that the process comprises the steps of heating crystals of polyhydrate of sodium sulfide under a pressure of about 500 torr or less at a tempera... | 12/22/1992 |
| 5173284 | Process for preparation of purified calcium sulfate in an aqueous medium A process for the preparation in an aqueous medium of purified calcium sulfate, with high whiteness, characterized in that it comprises: a) the formation of an aqueous solution by dissolution of impure hemihydrated calcium sulfate, at a concentration at most o... | 12/22/1992 |
| 5106600 | Process for producing tabular acicular gypsum crystals A process for economically producing tabular acicular gypsum crystals in a continuously stirred reactor is disclosed. The process involves establishing a steady state atmospheric pressure reaction zone of about 20% to about 25% by weight solids of gypsum ... | 04/21/1992 |
| 5084254 | Natural calcium carbonate ores There is disclosed a process for purifying a calcium carbonate-containing mineral which process comprises the following steps: a) mixing the calcium carbonate-containing mineral with water and a dispersing agent to form a suspension containing from 60% to 80% ... | 01/28/1992 |
| 4851208 | Process for the manufacture of spherical particles of metal compounds of group II of the periodic table A process for the manufacture of substantially spherical particles of at least one metal compound of Group II of the Periodic Table, comprising dissolving such compound in a solvent therefor to form a solution and introducing the solution into a non-solve... | 07/25/1989 |
| 4723962 | Process for recovering lithium from salt brines An improved process is described for recovering lithium from evaporatively concentrated brines. Epsom salt recovered from the brine at about 0° C. is added to the concentrated lithium-containing brine, so as to precipitate lithium sulfate monohydrate, th... | 02/09/1988 |
| 4685935 | Process for producing pure magnesium sulphite A process for producing a pure magnesium sulphite from crude crystalline magnesium sulphite. Into a full suspension or flow containing magnesium sulphite crystals at least one further water-containing and heat-supplying flow is led. The heat-supplying flo... | 08/11/1987 |
| 4569677 | Process for separating off calcium nitrate tetrahydrate by crystallization Separating Ca(NO3)2.4H.sub.2 O from a nitrophosphate digestion liquor by crystallization, wherein Ca(NO3)2.4H.sub.2 O seeding material with a particle size smaller than 100 μm is added to this liquor at a tempe... | 02/11/1986 |
| 4568352 | Alkali metal nitrate purification A process is disclosed for removing contaminants from impure alkali metal nitrates containing them. The process comprises heating the impure alkali metal nitrates in solution form or molten form at a temperature and for a time sufficient to effect precipi... | 02/04/1986 |
