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| Number | Title | Issue Date |
| 8029752 | Approach in controlling DSP scale in bayer process The invention provides a method of controlling silica in the liquor circuit of the Bayer process. The method involves addition of a promoter material to enhance the precipitation of DSP and includes adding one or more silica dispersion materials or dry silica forms ... | 10/04/2011 |
| 7976799 | Process for removal of aluminum oxides from aqueous media The present invention relates to the use of lithium salts and/or magnesium salts for the precipitation of aluminum oxides present in aqueous media. ... | 07/12/2011 |
| 7968067 | Process for removal of aluminum oxides from aqueous media The present invention relates to the use of lithium salts and/or magnesium salts for the precipitation of aluminum oxides present in aqueous media. ... | 06/28/2011 |
| 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 |
| 6627165 | Process for upgrading a titaniferous material containing silica A process for upgrading of titaniferous material containing silica, including pretreating the titaniferous material by alkaline leaching to precipitate the silica as an aluminosilicate which is amenable to further leaching. Subsequently, the pretreated ti... | 09/30/2003 |
| 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 |
| 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 |
| 6241893 | Water filtration media, apparatus and processes An amorphous potassium aluminosilicate filtration media which may be mixed with activated carbon filters water to remove oxygen, chlorines, hardness, alkalinity, ammonia, hydrogen, hydrogen sulfide, sodium sulfite and other contaminants. The particular so... | 06/05/2001 |
| 6093669 | Method for selecting raw material for bleaching clay A process for making a bleaching clay composition useful for purification of oil is disclosed. The process involves controlled acidification of a palygorskite and smectite clay mineral with sulfuric acid. The clay mineral starting material exhibits, in an... | 07/25/2000 |
| 6051517 | Modified zeolite membrane A modified zeolite or molecular sieve membrane for separation of materials on a molecular scale. The modified membrane is fabricated to wholly or partially block regions between zeolite crystals to inhibit transfer of larger molecules through the membrane... | 04/18/2000 |
| 6043177 | Modification of zeolite or molecular sieve membranes using atomic layer controlled chemical vapor deposition A process for modifying surfaces of zeolites and molecular sieve membranes to decrease effective pore size for separation of materials includes atomic layer controlled vapor or liquid deposition. The atomic layer controlled deposition process steps includ... | 03/28/2000 |
| 6027702 | Aluminum-based polymer material and use of this material in a photographic product The invention concerns an inorganic aluminum-based polymer and another element chosen from amongst silicon, titanium and zirconium. The polymer material is obtained from hydrolisable salts and/or compounds such as alcoxides. Application to the production ... | 02/22/2000 |
| 5972831 | Inorganic transparent photocatalytic composition The present invention concerns a novel photocatalytic composition, a photocatalytic element and a novel method for the photocatalytic treatment of effluents, comprising a gaseous or aqueous solution of the organic compounds to be destroyed. This novel pho... | 10/26/1999 |
| 5885536 | Process for alkaline leaching a titaniferous material A process for alkaline leaching of a titaniferous material containing silica and alumina impurities in which spent leachant is recycled by treating to remove the silica and alumina impurities therefrom, by heating, maintaining the leachant at leaching tem... | 03/23/1999 |
| 5883035 | Mesoporous silicoaluminate products and production thereof by controlled acid extraction of aluminum from calcium bentonite clay Disclosed is a process of making mesoporous silico-aluminates from calcium bentonite by controlled extraction of octahedral aluminum under mild condition, by acid, preferably phosphoric acid. The mesoporous silicoaluminates contain only tetrahedral alumin... | 03/16/1999 |
| 5858081 | Kaolin derivatives Amorphous derivatives of kaolin group minerals characterized by high specific surfaces and/or high cation exchange capacities and a 27 AL MAS NMR spectrum having a dominant peak at about 55 ppm relative to Al(H2 O)63+... | 01/12/1999 |
| 5843861 | Process for the synthesis of kaolin clays having varying morphological properties Substantially crystalline kaolin clays having varying morphological properties are produced by the hydrothermal treatment, in an acidic environment, of substantially amorphous calcined kaolin clay.... | 12/01/1998 |
| 5840113 | Treated clay product, methods of making and using and products therefrom An improved finely divided rubber-reinforcing clay mineral composition can be produced by employing a hydrous kaolin clay surface treated with a functional silane, a methylene donor compound such as hexamethylenetetramine, and a multifunctional methylene ... | 11/24/1998 |
| 5830818 | Process for the microwave beneficiation of discolored kaolin clay materials Kaolin clay materials containing discoloring impurities can be beneficiated by microwave irradiation in the presence of water and a polyprotic acid component to produce a beneficiated kaolin clay material having improved color and brightness.... | 11/03/1998 |
| 5827362 | Modified organoclays The invention provides a range of modified organoclays comprising intercalated moieties to provide an effective mechanism for attracting organic compounds into the interlamellar spaces in close proximity to other intercalated reactants. The intercalated m... | 10/27/1998 |
| 5783511 | Process for selecting raw material and making a bleaching clay A process for making a bleaching clay composition useful for purification of oil is disclosed. The process of involves controlled acidification of a palygorskite--smectite clay mineral with sulfuric acid.... | 07/21/1998 |
| 5685900 | Method for beneficiating discolored kaolin to produce high brightness coating clay A method for beneficiating a low brightness fine particle size discolored kaolin crude to produce a high brightness coating clay. By combining the two beneficiating techniques of selective flocculation and ozonation, a synergistic phenomena occurs and a c... | 11/11/1997 |
| 5685899 | Process for conditioning kaolin clays prior to removing impurities Kaolin clays are conditioned for the removal of colored titaniferous impurities by (A) first mixing the kaolin clay with a collector to condition the impurities, in the absence of a dispersant, but in the presence of sufficient water to yield a mixture ha... | 11/11/1997 |
| 5674315 | Process for preparing a meta-kaolin white pigment from kaolinite A fluidized bed reactor is supplied with fuel, oxygen-containing gas, and kaolinite, which contains water of crystallization. At least 80% by weight of the kaolinite have particle sizes in the range from 0.1 to 3 mm. A fluidized bed at temperatures in the... | 10/07/1997 |
| 5625054 | DNA purification by solid phase extraction using fluorinated celite The present invention relates to fluorinated surfaces which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the surface. Generally, the hydrophilic and elec... | 04/29/1997 |
| 5591256 | High performance synthetic alkali metal alumino-silicate, methods and uses, compositions and high solids reaction methods of their preparation Sodium alumino-silicates are produced by silicate/clay reactions under hydrothermal conditions with increased solids during processing while still producing structural materials characterized by low oil absorption values, high total pore volume and increa... | 01/07/1997 |
| 5573582 | Process for preparing fine-particulate metal hydroxide comprising aluminum hydroxide and metal oxide comprising aluminum oxide The present invention discloses a process for preparing a fine-particulate metal hydroxide comprising aluminum hydroxide as a major component which comprises continuously supplying water and a mixture of an aluminum alkoxide and at least one alkoxide of a... | 11/12/1996 |
| 5457272 | Method for capturing ecologically harmful substances from material polluted with such substances A method is described for capturing ecologically harmful substances, both of organic and inorganic nature, by absorbing these substances on a zeolite or on a swellable, layered clay which has been modified with hydroxyaluminium to form an aluminium-rich z... | 10/10/1995 |
| 5438129 | DNA purification by solid phase extraction using partially fluorinated aluminum hydroxide adsorbant The present invention relates to fluorinated surfaces which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the surface. Generally, the hydrophilic and elec... | 08/01/1995 |
| 5407600 | Stable aqueous alumina sol and method for preparing the same A stable aqueous sol of amorphous alumina containing Al2 O3 up to 15% by weight and 0.1 to 0.5 gram equivalent of an anion of acid to 1 mol of aluminum in the sol, in which the colloidal particles of amorphous alumina have a controll... | 04/18/1995 |
| 5364797 | Sensor device containing mesoporous crystalline material A sensor device includes ultra-large pore crystalline material M41S as a selective detecting element, and a measuring element for quantifying physical, chemical or biological events which occur within the crystalline material. The crystalline material may... | 11/15/1994 |
| 5364823 | Method for manufacturing inorganic porous layered member This invention relates to a method for manufacturing an inorganic porous layered member which can maintain a sufficient distance between layers to show a high degree of heat insulating properties. In the manufacturing method for the inorganic porous layer... | 11/15/1994 |
| 5223235 | Synthetic alkali metal alumino-silicates compounds and their methods of preparation A family of novel and unique synthetic alkali metal alumino-silicates (SAMS) are produced by the hydrothermal reaction between kaolin and alkali metal silicates. The integrated composition of the SAMS products is a unique entity having an overall composit... | 06/29/1993 |
| 4854971 | Clay composition There is disclosed a method for improving the rheological properties of a clay mineral which, when dispersed with water, either releases into solution or retains on its surface multivalent cations, which method includes the step of treating the clay miner... | 08/08/1989 |
| 4847075 | Hydrated aluminum silicate adsorbent supporting reductive substance An absorbent prepared by supporting an organic or inorganic reductive substance on hydrated aluminum silicate is useful as a pharmaceutical or as an absorbent for precious metal complexes such as gold complex, silver complex and the like.... | 07/11/1989 |
| 4836954 | Fluorinated phyllosilicate and method There is disclosed a fluorinated phyllosilicate material and method of producing such material. The material has fluoride ions chemically bonded to a natural phyllosilicate in part at least by exchange with hydroxyl ions. The method comprises exposing a p... | 06/06/1989 |
| 4661464 | Stabilized pillared layered clay, process for its production A stabilized pillared layered clay comprising a layered clay pillared by the residue of a material which has reacted with hydroxyl groups associated with the clay structure and its preparation by reacting under substantially anhydrous conditions in an org... | 04/28/1987 |
| 4604369 | Method of beneficiating kaolin clay utilizing ammonium salts A method of enhancing the brightness (beneficiating) of kaolin clays by removing titanium impurities is disclosed. The claimed method is a selective flocculation process wherein clay solids are blunged (dispersed) in water together with a dispersing agent... | 08/05/1986 |
| 4500350 | Disintegration of chromites In the disintegration of a chromite or chromium-containing residue, wherein the chromium-containing material is disintegrated with an alkaline compound in the presence of oxygen and a diluent at a temperature above about 800° C. and thereafter leached, t... | 02/19/1985 |
| 4483830 | Production of alumina A process for recovery of alumina and soda from materials containing sodium aluminosilicates, such as red mud and desilication products, comprises treating said materials with lime at elevated temperature and pressure. In a preferred embodiment of the inv... | 11/20/1984 |
