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| Number | Title | Issue Date |
| 7339088 | Alkylbenzene refining process and apparatus Improved processes and apparatus use a finishing column with a mid-cut that provides alkylbenzene products of high purity containing less than about 1 ppmw benzene and less than about 50 ppmw heavies while accommodating enhancements in the efficiencies and the capac... | 03/04/2008 |
| 6762144 | Processes for producing a blended bleaching clay product and blended bleaching clay products produced by those processes A process for the production of a bleaching clay product which includes the steps of selecting a naturally occurring, acidic hormite clay product, cleaning and crushing the hormite clay products to form clay clumps, selecting a naturally occurring less acidic, clay ... | 07/13/2004 |
| 6602816 | Activated clay particles having similar shapes, method for production thereof and use thereof Activated regular-shaped clay particles forming macropores therein, preserving fine structure of the dioctahedral smectite clay minerals, and having particle diameters controlled to lie within a range in which they exhibit excellent filtering property. Th... | 08/05/2003 |
| 6569798 | Processes for producing a blended bleaching clay product and blended bleaching clay products produced by those processes A process for the production of a bleaching clay product which includes the steps of selecting a naturally occurring, acidic hormite clay product, cleaning and crushing the hormite clay products to form clay clumps, selecting a naturally occurring less ac... | 05/27/2003 |
| 6531552 | Olefin polymerization catalyst and method for polymerizing olefin using the same An olefin polymerization catalyst comprising the following components (A) and (B): Component (A): an ion-exchange layered silicate having an acid site of at most -8.2 pKa, the amount of the acid site is equivalent to at least 0.05 mmol/g of 2,6-dimethylpy... | 03/11/2003 |
| 6379436 | Macroporaus aluminosilicate desiccant, preparation from sodalite and use in enthalpy energy wheels Sodalite is treated with acid to transform the surface to provide a highly macroporous material that demonstrates water swing capacities exceeding those of high performance, low temperature desiccants under high latent load at relatively high ambient temp... | 04/30/2002 |
| 6365536 | Method of making bleaching clay A bleaching clay having an enhanced bleaching performance in oils is produced by first beneficiating a raw clay to remove sand and thereafter conditioning and then concentrating the beneficiated clay with a pH modifier and a Lewis acid salt.... | 04/02/2002 |
| 6359108 | Method for polymerizing cyclic ether A process for polymerizing cyclic ethers over a heterogeneous catalyst comprises using a heterogeneous catalyst comprising one or more pillared interlayered clays (PILCs).... | 03/19/2002 |
| 6315816 | Adsorbents, method for the preparation and method for the separation of unsaturated hydrocarbons for gas mixtures A group of solid adsorbents in the form of powder, granules or pellets having improved adsorptive capacity and selectivity for ethylene and/or propylene is disclosed. These adsorbents comprise (a) a silver compound and (b) a bentonite clay support bulk of... | 11/13/2001 |
| 6235859 | Production process for polyvinyl ether and catalyst used for the process Provided are an industrially advantageous process for producing a polymer of polyvinyl ether at a temperature of not lower than a room temperature for short time, and a catalyst used for the process. The above process is characterized by using an acid cla... | 05/22/2001 |
| 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 |
| 5955049 | Mesopore material and method for producing the same A silicon dioxide tetrahedron sheet having a specific morphology with the pseudomorphs of the starting raw material of clay minerals for the sheet is prepared, and this is reacted with an alkylonium salt whereby a desired number of the silicon dioxide tet... | 09/21/1999 |
| 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 |
| 5869415 | Process for activating layered silicates A process is described for activation of layered silicates having an ion exchange capacity (IEC) of at least 25 meq/g by treating them with an acid, characterized in that the layered silicate is activated with about 1 to 10% by weight (based on the dry la... | 02/09/1999 |
| 5866744 | Process for converting a c9 + hydrocarbon to a C6 to C8 aromatic using a steamed, acid-leached, impregnated zeolite A catalyst composition and a process for converting a hydrocarbon stream such as, for example, a C9 + aromatic compound to C6 to C8 aromatic hydrocarbons such as xylenes are disclosed. The catalyst composition comprises an... | 02/02/1999 |
| 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 |
| 5756415 | Method of making a enzyme immobilizing carrier A method of preparing an enzyme immobilizing carrier includes the steps of providing a material consisting of kaolin mineral. The material is subject to acid treatment with a strong acid having a pH of 4 or less, and hydrothermal treatment at a temperatur... | 05/26/1998 |
| 5639492 | Method and composition for achieving animal weight gain with mycotoxin-contaminated animal food A method of increasing the nutritional value of mycotoxin-contaminated animal feed ingested by an animal by feeding the animal an acid-activated montmorillonite clay simultaneously with the mycotoxin-contaminated or ergot-contaminated animal feed. The aci... | 06/17/1997 |
| 5260456 | Process for producing itaconic anhydride A process for producing anhydrides by passing a solution of the acid, preferably an organic polyacid, which is to undergo anhydridation over an acidified clay and a process for producing the catalysts therefor.... | 11/09/1993 |
| 5220086 | Catalytic processes in the presence of zeolites of increased internal acid activity and decreased external acid activity The invention relates to the treatment of crystals of ZSM-5 with mineral acid to produce ZSM-5 crystals which have an acid activity associated with the pores and channels thereof, the shape selective portion of the crystal, which is greater than the acid ... | 06/15/1993 |
| 5173463 | Kaolin containing fluid cracking catalyst To obtain an improved catalyst for fluid cracking purposes, kaolin or metakaolin is reacted with an acid of the group of phosphoric, sulphuric and acetic acids by mixing and heating to 25°-110° C., after which the slurry is washed. The thus obtained kao... | 12/22/1992 |
| 5082815 | Kaolin containing fluid cracking catalyst To obtain an improved catalyst for fluid cracking purposes, kaolin or metakaolin is reacted with an acid of the group of phosphoric, sulphuric and acetic acids by mixing and heating to 25°-110° C., after which the slurry is washed. The slurry is not neu... | 01/21/1992 |
| 5008227 | Process for making acid activated bleaching earth using high susceptibility source clay and novel bleaching earth product A process for making acid-activated bleaching earth from a crude attapulgite clay. A crude is selected which is mildly acidic and contains at least about 90% attapulgite. The process involves treating such clay with low levels of activating acid which are... | 04/16/1991 |
| 5008226 | Process for making acid activated bleaching earth using high susceptibility source clay and novel bleaching earth product A process for making acid-activated bleaching earth from certain naturally occurring mixtures of calcium bentonite and attapulgite clay. The process involves treating such clay with low levels of activating acid which are mixed with the dried and ground c... | 04/16/1991 |
| 4919818 | Process for extruding and treating clay for improved filtration A method of extruding clay and then treating the clay with acid to beneficiate the clay for increased capacity of filtration of oil-soluble colorant compounds from oil. The clay is first extruded through one or more die openings to align some of the clay ... | 04/24/1990 |
| 4847226 | Process for extruding and acid treating clay for improved filtration A method of extruding clay and then treating the clay with acid to beneficiate the clay for increased capacity of filtration of oil-soluble colorant compounds from oil. The clay is first extruded through one or more die openings to align some of the clay ... | 07/11/1989 |
| 4738690 | Method of removing entrained particles from flue gas and composition of matter A composition of matter is used to treat particles entrained in flue gas. The composition comprises a caustic liquid to adjust the resistivity of the entrained particles. An inert particulate matter supports the caustic liquid to inhibit the chemical acti... | 04/19/1988 |
| 4717699 | Process for acid treating clay for improved filtration A method of treating clay with acid to beneficiate the clay for increased capacity of filtration of oil-soluble colorant compounds from oil. The clay is ground to a particle size distribution such that more than 50% by weight of the clay, on a dry basis, ... | 01/05/1988 |
| 4656150 | Treatment of sericitic clays to produce an adsorbent, absorbent product An adsorbent, absorbent product can be produced from sericitic clays by removing alumina values from such clays with a mineral acid, removing oil contaminants from such clay with a solvent or solvent mixture and removing amorphous silica from them with a ... | 04/07/1987 |
| 4568657 | Catalyst formed of natural clay for use in the hydrodemetallization and hydroconversion of heavy crudes and residues and method of preparation of same A natural active stable catalyst for use in the hydrodemetallization (HDM) and the hydroconversion (HC) of heavy crudes and residues and, in particular, a method for the preparation of the catalyst from natural clay and a process for the treatment of heav... | 02/04/1986 |
| 4565794 | Production of silica gel and an adsorbent, absorbent product from sericitic clay Sericitic clays can be treated so as to produce silica gel and an adsorbent, absorbent product capable of being utilized in many different applications. In treating such clays to produce such products, finely ground clay particles are digested with an alk... | 01/21/1986 |
| 4529416 | Gas separation kinetics in commercial pellets To improve the column dynamics of commercial pelleted sodium aluminosilicate zeolite adsorbents used in gas separation, the pellets are treated by washing in dilute aqueous mineral acid. The treatment is most effective as applied to sodium mordenite pelle... | 07/16/1985 |
| 4520222 | Polymerization catalyst and deodorizing agent and process of use Calcium silicate treated with an acid can be used as a polymerization catalyst or as a deodorizing agent. The acid is sulfuric acid, phosphoric acid or nitric acid.... | 05/28/1985 |
| 4511752 | Process for the hydroisomerization of paraffins A process is disclosed for the preparation of a more active paraffin hydrocarbon hydroisomerization catalyst from synthetic mica montmorillonite, preferably a nickel synthetic mica montmorillonite catalyst, which may also contain palladium, by treating th... | 04/16/1985 |
| 4493762 | Method for reducing the nitrogen content of shale oil with spent oil shale and sulfuric acid A method is disclosed for reducing the nitrogen content of oil shale by removing therefrom nitrogen-containing compounds. The nitrogen content of shale oil is reduced by agitating the shale oil with designated amounts of acidified spent oil shale. Acidifi... | 01/15/1985 |
| 4468476 | Color precursor removal from detergent alkyl benzenes An adsorbent is provided for removing color precursors from detergent range alkyl benzene prior to sulfonation. The adsorbent provided is a bauxite clay having at least one material selected from the group consisting of ferric oxide, titanium dioxide, and... | 08/28/1984 |
| 4329257 | Method of producing a catalyst from clay minerals for the hydration of olefins A method for producing a catalyst comprising phosphoric acid and a carrier, for the hydration of olefins with 2-3 carbon atoms to the corresponding alcohols, the method comprising: contacting a clay, containing essentially montmorillonite, contaminated by ... | 05/11/1982 |
| 4235751 | Modified montmorillonite clay catalyst A modified montmorillonite clay is prepared by heating it, impregnating it with an organic liquid, acid-activating it with a strong acid, and then washing it with water until it is substantially free of acid anions. The modified clay is useful as a cataly... | 11/25/1980 |
| 4147521 | Acid washed montmorillonite clays for improving electrostatic precipitation of dust particles A method for the electrostatic precipitation of dust particles entrained in a gas stream which comprises adding predetermined amounts of acid washed montmorillonite clays into the particle-laden gas stream in a location preceding the precipitation apparat... | 04/03/1979 |
| 3958058 | Ultra-low expansion ceramic articles Ultra-low expansion ceramic articles, having average linear coefficients of thermal expansion below about 5.4 × 10-.sup.7 /°C over the range from room temperature to 1000°C, are produced by removal of MgO and Al2 O3 fro... | 05/18/1976 |
