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| Number | Title | Issue Date |
| 8052837 | Deinking of waste paper Waste paper is deinked by a composition which comprises a surfactant and a hydrophobic-based deinking component. ... | 11/08/2011 |
| 6761763 | Process for compacting calcined kaolin clay Calcined kaolin clay having a high bulk density, improved wet out and slurry incorporation times is produced by using pressure to compact the clay. Other properties of the compacted clay are improved or equivalent to the non-compacted starting calcined clay material... | 07/13/2004 |
| 6610136 | Pigments for ink jet paper Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating and filling compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then opt... | 08/26/2003 |
| 6478865 | High surface area aggregated pigments Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then optionally acid... | 11/12/2002 |
| 6475274 | Process for modifying particle size distribution Fine-grained Tertiary kaolin clay pigments providing improved opacity, sheet gloss and print gloss to paper coated with these pigments are produced by removing fine and coarse particles to produce pigments having a narrow particle size distribution.... | 11/05/2002 |
| 6379452 | Calcined kaolin clay pigments having improved color and process for the manufacture thereof Calcined kaolin clay pigments having improved color are manufactured by adding a blue agent to the kaolin clay pigment prior to calcination, and then calcining the pigment and blue agent mixture.... | 04/30/2002 |
| 6238473 | Kaolin clay agglomerates and process for the manufacture thereof Kaolin clay agglomerates having improved bulk density, improved rheological properties and good optical properties are provided by mixing calcined kaolin clay, hydrous kaolin clay and water and then subjecting the mixture to high pressure in a compaction ... | 05/29/2001 |
| 6200377 | Process for beneficiation of mixtures of mineral particles An improved process for the beneficiation of mixtures of mineral particles (such as kaolin clays) containing minerals which chelate with hydroxamates. The use of a silicon-containing compound in combination with a hydroxamate results in a more effective s... | 03/13/2001 |
| 6186335 | Process for beneficiating kaolin clays A improved process for beneficiating kaolin clays to remove discoloring impurities is disclosed. The beneficiation of kaolin clay is improved by fractionating a kaolin clay starting material into a lower brightness first fraction having a majority of the ... | 02/13/2001 |
| 6041939 | Beneficiation with selective flocculation using hydroxamates A process which uses selective flocculation with hydroxamates for the beneficiation of mixtures of mineral particles (such as kaolin clays). The increased selectivity of hydroxamates for certain mineral phases within kaolin clays and other mixtures of min... | 03/28/2000 |
| 6007618 | Kaolin clays which are conditioned 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... | 12/28/1999 |
| 5925327 | Process for improving the physical properties of formed particles A process for significantly improving the physical properties of formed particles is disclosed. The process includes adding an effective amount of an acid stable surfactant or an alkaline stable surfactant to a component of the material before drying the ... | 07/20/1999 |
| 5891326 | Process for removing impurities from kaolin clays Colored impurities are removed from kaolin clay by an improved flotation process in which a blend of a fatty acid compound and a hydroxamate compound is used as a collector.... | 04/06/1999 |
| 5891236 | Process for improving the color and brightness of discolored goethite-containing materials Materials, such as kaolin clays, which are discolored by the presence of goethite mineral impurities are first heated to convert the goethite to hematite and then treated to remove the hematite, whereby the color and brightness of the product are improved... | 04/06/1999 |
| 5866496 | Cracking catalyst and process for preparing same The invention is a catalyst and a process for manufacturing a catalyst. The process includes adding an effective amount of an acid stable surfactant or an alkaline stable surfactant to a slurry of particles including an active mineral component. Desirable... | 02/02/1999 |
| 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 |
| 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 |
| 5810998 | Process for improving the brightness of fine-grained kaolin clays Fine-grained kaolin clays having improved brightness can be produced by (a) using centrifugation to fractionate the clay starting material into finer and coarser fractions, (b) subjecting the coarser fraction to flotation to remove discoloring impurities ... | 09/22/1998 |
| 5739072 | Process for improving the physical and catalytic properties of a fluid cracking catalyst A process for significantly improving the physical and catalytic properties of fluid cracking catalysts (FCC) is disclosed. The invention is a process for manufacturing a fluid cracking catalyst. The process includes adding an effective amount of an acid ... | 04/14/1998 |
| 5711930 | Process for improving the phyiscal properties of formed particles A process for significantly improving the physical properties of formed particles is disclosed. The process includes adding an effective amount of an acid stable surfactant or an alkaline stable surfactant to a component of the material before drying the ... | 01/27/1998 |
| 5707912 | Process for the treatment of clay materials to provide slurries having improved rheological properties Clay materials, such as kaolin, containing expandable layer-silicates are chemically treated with a source of magnesium cations, followed by a pH adjustment, to provide a slurry product having improved rheological properties.... | 01/13/1998 |
| 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 |
| 5672555 | Kaolin-potassium acetate intercalation complex and process of forming same A process for intercalating potassium acetate molecules in kaolin clay particles to achieve delamination has been developed by mixing kaolin clay particles, potassium acetate and water. A maximum intercalation, and hence a maximum degree of delamination, ... | 09/30/1997 |
| 5647895 | Reduction of microorganisms in kaolin clay slurries A biologically stable kaolin clay slurry is manufactured by heating a kaolin clay slurry for at least 15 minutes at a temperature of at least 93° C., cooling the slurry to a temperature no greater than about 35° C. and then adding a microbiocide to the ... | 07/15/1997 |
| 5593490 | Kaolin clay slurries having reduced viscosities and process for the manufacture thereof A kaolin clay slurry having a reduced viscosity is manufactured by a process which comprises the sequential steps of mechanically working an undispersed crude kaolin clay material having a solids content of at least about 65 percent, by weight, under cond... | 01/14/1997 |
| 5584924 | Opacifying kaolin clay pigments having improved rheology and process for the manufacture thereof An opacifying kaolin clay pigment with improved rheological properties and good opacifying characteristics is manufactured by a process which comprises reacting a mixture of water, kaolin clay and calcium carbonate with a hydroxide component at a temperat... | 12/17/1996 |
| 5584925 | Chemically aggregated kaolin clay pigment and process for making the same by phosphate bonding An opacifying kaolin pigment with improved porosity, light scattering ability (opacity), gloss, and ink receptivity over that of the starting pigment is manufactured by a process which comprises the steps of treating an aqueous solution of kaolin with a p... | 12/17/1996 |
| 5543372 | Stable high solids slurries of structured clay materials and process for the manufacture thereof A stable high solids structured clay slurry is manufactured by a process which comprises the sequential steps of forming a high solids slurry by mixing a structured clay material with water in a first stage mixing step under conditions which promote parti... | 08/06/1996 |
| 5496398 | Reduction of microorganisms in kaolin clay slurries A biologically stable kaolin clay slurry is manufactured by heating a kaolin clay slurry for at least 15 minutes at a temperature of at least 93° C., cooling the slurry to a temperature no greater than about 35° C. and then adding a microbiocide to the ... | 03/05/1996 |
| 5330943 | Process for improving the physical and catalytic properties of a fluid cracking catalyst A process for significantly improving the physical and catalytic properties of fluid cracking catalysts (FCC) is disclosed. The invention is a process for manufacturing a fluid cracking catalyst. The process includes adding an effective amount of an acid ... | 07/19/1994 |
| 5135756 | Process for improving the physical and catalytic properties of a fluid cracking catalyst A process for significantly improving the physical and catalytic properties of fluid cracking catalysts (FCC) is disclosed. The invention is a process for manufacturing a fluid cracking catalyst. The process includes adding an effective amount of an acid ... | 08/04/1992 |
| 5089056 | Opacifying kaolin pigments and process for making same by reacting with sodium hydroxide in water An opacifying pigment with enhanced light scattering properties for use as a paper coating or filler material is produced by reacting kaolin in the presence of water with sodium hydroxide or potassium hydroxide at a temperature in excess of 60° C. The ka... | 02/18/1992 |
| 4946814 | Process for improving the physical and catalytic properties of fluid cracking catalysts A process for significantly improving the physical and catalytic properties of faujasite containing fluid cracking catalysts (FCC) employing a sol binder by incorporating acid stable surfactants into the catalyst component streams prior to spray drying.... | 08/07/1990 |
| 4629556 | Purification of kaolin clay by froth flotation using hydroxamate collectors An improved flotation process for removal of colored titaniferous impurities from kaolin clay uses as collector a hydroxamate compound, or a mixture of compounds, having the formula ##STR1## in which R is an alkyl, aryl, or alkylaryl group having 4-2... | 12/16/1986 |
| 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 |
| 4018673 | Centrifuge processing of high-solids clay Method of removing coarse materials and chemical and mineral impurities from clay in order to produce a purified high solids suspension of said clay which method involves mixing a crude clay with water and a dispersing agent to form a high solids slurry; ... | 04/19/1977 |
