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| Number | Title | Issue Date |
| 7256156 | Reactive-adsorptive protective materials and methods for use A reactive-adsorptive protective material having an activated carbon adsorbent, including those manufactured from a gel-type ion exchange resin. The activated carbon adsorbent has adsorptive properties for adsorbing chemical impurities. The activated carbon is wettl... | 08/14/2007 |
| 6184177 | Method of producing activated carbon particles from spent granular organic ion-exchange resin A method of processing spent ion-exchange resins contaminated with suspended particles, inorganic residues and/or organic foreign matter so as to render the resin ineffective for continued use, by which method this waste material can be processed to produ... | 02/06/2001 |
| 5990041 | Mesoporous activated carbon filaments This invention relates to a mesoporous carbon material in the form of filaments having a high surface area. A process is also provided to produce mesoporous carbon material of high surface area. The process comprises drying a carbon material, surface oxid... | 11/23/1999 |
| 5977016 | Process for producing granulated activated carbon Granulated activated carbon is produced by an improved process which involves carbonizing pellets of a styrene-divinyl benzene copolymer matrix with concentrated sulfuric acid at temperatures up to at least 750° C., followed by activation at temperatures... | 11/02/1999 |
| 5968471 | Process for producing molecular sieve carbon A process for producing a molecular sieve carbon, which comprises subjecting a cured product obtained by curing a raw material thermosetting resin to heat oxidation; pulverizing the oxidized product formed after the heat oxidation treatment; granulating t... | 10/19/1999 |
| 5840651 | Process for the production of activated coke for simultaneous desulfurization and denitrification Disclosed is a process for the production of high-strength activated coke for desulfurization and denitrification. The process comprises forming a mixture of plural coals of different caking properties and a binder, said mixture containing said coal of hi... | 11/24/1998 |
| 5714433 | Activated carbon treated by carbon dioxide for the stabilization of treated water pH Treatment of a wet activated carbon with carbon dioxide or with carbon dioxide followed by air results in a carbon having a reduced contact pH. The activated carbon is characterized by a modified contact pH less than about 9.0 and typically between about ... | 02/03/1998 |
| 5464605 | Process for the decomposition and removal of peroxides A process is provided for the removal of peroxides from gaseous or liquid media. The improvement is provided by the use of a carbonaceous char active for peroxide decomposition which is prepared by the carbonization and oxidation of a bituminous coal or b... | 11/07/1995 |
| 5444031 | Process for making catalytic carbon An improved process is provided for the manufacture of a catalytically-active carbonaceous char capable of rapidly decomposing hydrogen peroxide in aqueous solutions. The process of the invention uses a low temperature carbonization and extensive oxidatio... | 08/22/1995 |
| 5356849 | Catalytic carbon Carbonaceous chars capable of catalytically decomposing aqueous hydrogen peroxide at higher rates at given char densities than other known catalytic chars are provided for. This improvement is provided by an increase in the catalytic activity at a given c... | 10/18/1994 |
| 5164355 | High capacity coconut shell char for carbon molecular sieves A coconut shell char having a high oxygen volumetric capacity is provided by crushing and sizing coconut shells to form granules which are then heated in flowing inert gas at a temperature ramp rate of about 2° to 12° C. per minute to a peak temperature... | 11/17/1992 |
| 5071820 | Carbonaceous material with high micropore and low macropore volume and process for producing same A method which minimizes macropore formation while producing microporous carbon comprises a two stage process. Firstly, the carbon is heated to a temperature in the range of about 150° to about 200° C. in the presence of oxygen for a time in the range o... | 12/10/1991 |
| 5064801 | Process for manufacturing a carbon catalyst A process for manufacturing a carbon catalyst for use in NOx reduction with ammonia catalyzed by active carbons and active cokes is described. The new carbon catalyst exhibits improved catalytic activity and hence a higher yield in NO. In the m... | 11/12/1991 |
| 4978650 | Desensitizing activated carbon sorbents to the effects of humidity An activated carbon sorbent in which oxygen has been substantially removed from said carbon by outgassing and said oxygen has been replaced by subsequent reaction of the outgassed carbon with a passivating substance.... | 12/18/1990 |
| 4734394 | Process for producing molecular sieve carbon fibers Molecular sieve carbon fibers capable of separating and purifying nitrogen from air in large quantities are provided. The carbon fibers have diameters of 5 to 50 μm and micropores opening directly at the surface of the carbon fibers with pore sizes of 0.... | 03/29/1988 |
| 4594440 | Process for recovering and purifying herbicidal phenoxybenzoic acid derivatives Crude phenoxybenzoic acid herbicide, e.g., acifluorfen, having one or more undesirable isomer/by-product impurities associated therewith is separated therefrom employing an inert solvent which is selective for the isomers/other by-products.... | 06/10/1986 |
| 4460708 | Production of activated carbon fibers from acid contacted polybenzimidazole fibrous material An improved process which makes possible the expeditious formation of activated carbon fibers having high absorptivity characteristics is provided. A polybenzimidazole fibrous material is contacted with a solution of an acid (e.g. sulfuric acid) so as to ... | 07/17/1984 |
| 4285831 | Process for production of activated carbon fibers A process for producing activated carbon fibers of high adsorption capacity which comprises oxidizing an acrylonitrile based fiber, wherein the acrylonitrile based fiber is a homopolymer of acrylonitrile, a copolymer containing about 60% by weight or more... | 08/25/1981 |
| 4256607 | Process for production of activated carbon fibers A process for producing activated carbon fibers comprising subjecting an acrylonitrile based fiber to oxidation processing in an oxidizing atmosphere at a temperature of about 200° C. to about 300° C. while applying a tension to the fiber until the amou... | 03/17/1981 |
| 4230602 | Process for producing highly activated carbonaceous products A single-pass, continuous process converts organic feedstocks into activated carbonaceous products having high surface area values. The introduction of air and steam into the bed of material at selected locations, and at controlled rates, enables the econ... | 10/28/1980 |
| 4221695 | Adsorbent for artificial organs An absorbant for use in artificial organs which is obtained by mixing and dissolving pitch with an aromatic compound and a polymer or copolymer of a chain hydrocarbon, dispersing the resultant mixture in water giving rise to beads and subjecting these bea... | 09/09/1980 |
| 4204979 | Method of processing activated carbon A method for processing of sewage sludge from wastewater treating plants and the initial activation and regeneration of activated carbon granules or powder used for adsorption in wastewater treatment and the like. The method is carried out by supporting t... | 05/27/1980 |
| 4139416 | Carbonaceous material with high characteristics of surface area and activity and process for producing the same A carbonaceous material with high characteristics of surface area and activity is produced in a continuous process by heating and drying ground pit coal at 200 to 300° C. for 15 to 120 minutes in air, and then heating in two further stages in fluidized b... | 02/13/1979 |
| 4115317 | Method and apparatus for regenerating and manufacturing activated carbon This invention relates to a system for regenerating and manufacturing activated carbon wherein the exhaust gases and vapors from the upper portion of a multiple hearth furnace are passed to a gas cooling apparatus such as a quencher or scrubber, the clean... | 09/19/1978 |
| 4102812 | Production of carbon from coal granules prepared in a fluid energy mill Granular active carbon having satisfactory adsorbency and hardness characteristics and having a high proportion of its porosity in the below 2000 A range is produced from granules prepared from coal fluid energy milled until not more than 1% of the partic... | 07/25/1978 |
| 3953345 | Method for the production of activated carbon spheres containing nitrogen Spheres of activated carbon are obtained by adding to 100 parts by weight of pitch 10 to 50 parts by weight of an aromatic solvent compatible with said pitch and 2 to 50% by weight, based on the total weight of said pitch and said aromatic solvent, of a n... | 04/27/1976 |
| 3951856 | Process for making activated carbon from agglomerative coal Fluidized bed technique for oxidizing normally agglomerative bituminous coal is disclosed. One high rank bituminous coal is prepared for activation by grinding, briquetting and crushing to the 3/4 inch to 4 mesh size. Thereafter, the coal particles are fl... | 04/20/1976 |
