Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7820121 | Destruction of organics in Bayer process streams A Bayer process is disclosed. The Bayer process includes a step of treating any one or more of: (a) Bayer liquor or liquors produced in the process, (b) precipitated aluminium trihydrate particles produced in the process, and (c) other solids added to or produced in... | 10/26/2010 |
| 7807119 | Bayer process for production of alumina trihydrate, the said improvement relating to separation of aluminate liquor and insoluble residues A process for the production of alumina trihydrate by alkaline digestion of bauxite using the Bayer process in which aluminate liquor and insoluble residues are separated using a solid/liquid separation device (E; W2; DC) characterised in that the said slurry... | 10/05/2010 |
| 7771681 | Method for improved aluminum hydroxide production The present invention relates ways to increase the output of a high quality product from the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated aluminum hydroxide while not reducing the t... | 08/10/2010 |
| 7704471 | Bayer process for production of alumina trihydrate by alkaline digestion of bauxite, the process comprising a predesilication step A Bayer process comprises grinding and then digestion of bauxite by bringing it into contact with a sodium aluminate liquor. Digestion consists of forming a slurry that is then treated to separate insoluble residues from the sodium aluminate liquor. The liquor is th... | 04/27/2010 |
| 7691348 | Process for the removal of anionic impurities from caustic aluminate solutions A process for removing anionic impurities from a caustic aluminate solution having aqueous tetrahydroxy aluminate ions is described. A caustic aluminate solution is obtained such that anionic impurities are partially or substantially substituted into tetrahydroxy al... | 04/06/2010 |
| 7658896 | Method for attacking bauxite enhancing filterability of sludge in attack output Process for the treatment of bauxite (10) by alkaline digestion, typically using the Bayer process in order to obtain alumina hydrate, characterized in that ground bauxite (11, 15) is added directly into an alkaline solution (21a) that is... | 02/09/2010 |
| 7270704 | Mixture for fabrication of fireproof high-strength spherical granules and the method of their manufacture The inventive method for producing refractory high-strength spherical granules consists in separately presintering kaolin and bauxite in a rotational furnace, jointly sintering said components in order to produce a charging material, granulating, drying and screenin... | 09/18/2007 |
| 7264729 | Process for reducing contaminants in condensate resulting from the conversion of bauxite to alumina This invention relates to a process for reducing the contaminants in condensate resulting from the conversion of bauxite to alumina. ... | 09/04/2007 |
| 7247292 | Aluminum hydroxide and production process thereof A method for producing aluminum hydroxide includes a step of elevating a temperature of a slurry of aluminum hydroxide suspended in a sodium aluminate solution from 70° C. or lower to 85° C. or higher, and a step of applying a centrifugal force to the slurry. The ... | 07/24/2007 |
| 7244404 | Process for the removal of oxalate and/or sulphate from bayer liquors A process for the removal and causticisation of sodium oxalate and/or sodium sulphate from a Bayer process liquor containing sodium carbonate and one or both of sodium oxalate and sodium sulphate in an alumina refinery is described. The process is based on the obser... | 07/17/2007 |
| 7217408 | Solubilisation of carbonates by recycling condensates during digestion of monohydrate bauxites under pressure A method for the production of aluminum from bauxites containing aluminum monohydate of the diaspore or boehmite type which may contain more than 1.5% by weight of calcium carbonates. The ore is digested by producing feeding a suspension produced from milled bauxite... | 05/15/2007 |
| 7153436 | Method for enhancing cyclonic vessel efficiency with polymeric additives The present invention is directed to a novel method and system for enhancing the efficiency of hydraulic centrifugal separators (cyclones) in the removal of fine size particles from a liquid carrying medium. More particularly, it is concerned with improvements in th... | 12/26/2006 |
| 7077963 | Processes for water treatment The invention provides compositions comprising bauxite refinery residues that have been reacted with sufficient calcium and magnesium ions that they have a reaction pH of less than 10.5, and one or more water treating additives. The invention also provides processes... | 07/18/2006 |
| 7067106 | Aluminum hydroxide, made via the bayer process, with low organic carbon A composition of matter which is aluminum hydroxide, produced using the Bayer Process, wherein the aluminum hydroxide produced has a Total Organic Carbon of less than about 0.5 milligrams Total Organic Carbon/gram aluminum hydroxide. ... | 06/27/2006 |
| 6878357 | Method for particle size distribution control in a bayer circuit decomposition chain, comprising an agglomeration phase In a BAYER circuit, a process for controlling precipitation in which particle size quality of alumina hydrate produced in the circuit and circulating in feed tanks is monitored utilizing a calibration step and a control step. In the calibration step, cumulative perc... | 04/12/2005 |
| 6821440 | Treatment of mineral materials A process in which material comprising an aqueous liquid with dispersed particulate solids is pumped as a fluid then allowed to stand and rigidify and the rigidification is improved whilst retaining the pump ability of the material by combining polymeric particles w... | 11/23/2004 |
| 6814873 | Method of preventing or reducing aluminosilicate scale in a bayer process Materials and a process are provided whereby polymers with the pendant group or end group containing —Si(OR″)3 (where R″ is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in a Bayer process. When materials o... | 11/09/2004 |
| 6740249 | Filtration aid for the bayer process A formulation for use as a treating agent in the Bayer process is disclosed. The formulation comprises a blend of 200-300 ppm of starch and up to 10 ppm of another polysaccharide. When added to a liquor derived from the digestion of bauxite ore in a caustic solution... | 05/25/2004 |
| 6726845 | Dextran starch and flocculant combination for improving red mud clarification The claimed invention is a method for separating Bayer process red mud from a Bayer process liquor which comprises adding to a Bayer process liquor containing red mud an effective amount of a water soluble synthetic flocculant, dextran and starch combination. The fl... | 04/27/2004 |
| 6669852 | Separation method of goethite-containing red mud In order to provide a method for effectively separating red mud generated during alumina-extraction treatment of an alumina ore containing goethite as an iron component, the alumina ore containing goethite as an iron component is treated with an alkaline ... | 12/30/2003 |
| 6616902 | Feed processing for improved alumina process performance A process is disclosed for the treatment of an alumina process feedstock prior to transferring the treated feedstock to an alumina process for extracting refined alumina from the treated feedstock. The treatment process includes the following steps: (a) h... | 09/09/2003 |
| 6599489 | Aluminum trihydrate crystals and improved method for the production thereof The present invention provides an improved process for the production of alumina trihydrate crystals. Through the addition of a hydroxamated polymer at various stages of the process for production of these alumina trihydrate crystals, an upward shift in t... | 07/29/2003 |
| 6582670 | Feed processing for improved alumina process performance A process is provided for the treatment of an alumina process feedstock prior to transferring the treated feedstock to an alumina process for extracting refined alumina from the treated feedstock. The treatment process includes: (a) heating the alumina pr... | 06/24/2003 |
| 6555076 | Bauxite ore digestion in the bayer process The process according to the invention to raise simultaneously to an optimum level the temperature and concentration of an aqueous medium intended for use in bauxite ore digestion in an alumina production plant according to the Bayer process, which includ... | 04/29/2003 |
| 6555077 | Organic impurity removal process for bayer liquors A process for the removal of organic impurities in a Bayer process liquor in which wet and dry oxidation processes are linked together in a complementary way, such that the weaknesses of each individual organic removal process become a strength of the com... | 04/29/2003 |
| 6527959 | Method of clarifying bayer process liquors using salicylic acid containing polymers A method of flocculating suspended solids in a Bayer process liquor comprising adding to the liquor an effective amount of a polymer comprising salicylic acid groups.... | 03/04/2003 |
| 6528028 | Process for treating bauxite in which a desilication product and an insoluble residure are separately precipitated A process in which alumina is extracted from bauxite with an aqueous alkali solution, and a desilication product is precipitated such that the product is not contained in a bauxite residue and does not form a complex. The desilication product is mixed wit... | 03/04/2003 |
| 6479024 | Process for removing impurities from bauxite A process for producing alumina from bauxite is described in which bauxite is treated with an alkali to form a mixture comprising a solution of aluminum-containing ions and alumina trihydrate is precipitated from the solution. The process comprises treatm... | 11/12/2002 |
| 6391277 | Bayer process for production of alumina trihydrate An improvement in the Bayer process for producing alumina trihydrate in which bauxite ore is digested in a mixture with a digestion sodium aluminate liquor to produce a slurry, the slurry is settled to remove undigested residues therefrom and produce a pr... | 05/21/2002 |
| 6365116 | Rheology modification of settled solids in mineral processing The present invention comprises a method for reducing the viscosity of the settled mud or underflow of a raked thickener thereby reducing the torque necessary to move the rake blade through the settled mud. The method includes the step of delivering a vis... | 04/02/2002 |
| 6309615 | Process for removing reactive silica from a bayer process feedstock A process for the removal of reactive silica from a feedstock to the digestion step of the Bayer process for the manufacture of alumina, in which (a) the feedstock is contacted with a caustic liquor under process conditions which result in dissolving and ... | 10/30/2001 |
| 6299846 | Process for producing aluminum hydroxide from alumina-containing ore The present invention provides a process for producing aluminum hydroxide with little contamination by silica at a high yield, while suppressing losses of consumed alumina and alkaline components. The process comprises the steps of mixing a first alumina-... | 10/09/2001 |
| 6296819 | Process for the manufacture of coarse aluminium hydroxide A process for the manufacture of coarse aluminum hydroxide via the Bayer Process. The process involves the decomposition of a supersaturated alkaline aluminate liquor in a two stage precipitation process having an agglomeration stage and a growth stage. T... | 10/02/2001 |
| 6296818 | Method for processing bauxite rich in alumina monohydrate A process for treating an alumina monohydrate-based bauxite by high temperature caustic digestion includes the steps of introducing alumina trihydrate into the digested slurry at a temperature of less than 200° C., in order to obtain an aluminate liquor ... | 10/02/2001 |
| 6231768 | Rheology modification of settled solids in mineral processing The present invention comprises a method for reducing the viscosity of the settled mud or underflow of a raked thickener thereby reducing the torque necessary to move the rake blade through the settled mud. The method includes the step of delivering a vis... | 05/15/2001 |
| 6168767 | Production of alumina A process of recovering alumina from a pregnant Bayer process liquor by crystallisation after adding to the liquor a crystallisation modifier characterised in that the crystallisation modifier comprises: (a) a polyalkoxylated non-ionic surfactant, (b) a surfac... | 01/02/2001 |
| 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 |
| 6086834 | Process for the removal of silica from an alkaline solution containing sodium aluminate A process is described for removing dissolved silica from an alkaline solution containing sodium aluminate, e.g. a Bayer process solution. The process comprises contacting the alkaline solution with a slowly stirred bed of particles comprising coarse sili... | 07/11/2000 |
| 6086771 | Water continuous emulsion polymers for improving scale control in the bayer process The present invention is directed to improvements in the Bayer mining process, used for the recovery of alumina from bauxite ore. Water-continuous emulsion polymers are advantageously used to improve the clarification, filtration and scale control of red-... | 07/11/2000 |
| 6077486 | Process for purifying alumina by mixing a Bayer process stream containing sodium aluminate with amidoxime polymer to reduce the level of iron A process for reducing the level of colloidal iron in a Bayer process stream comprises intermixing an amidoxime polymer with a Bayer process stream and separating the resultant polymer-iron complex to provide purified sodium aluminate solution.... | 06/20/2000 |
