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| Number | Title | Issue Date |
| 7077968 | Method for continuously filtering raw brine for use in chlor-alkali electrolysis The method of continuously processing raw brine with a solids content to obtain substantially solids-free pure brine (E) for use in chlor-alkali electrolysis. In this method the raw brine (A) is separated, by means of a decanter (1), into a clear brine (B) wi... | 07/18/2006 |
| 6471933 | Ozone-oxidized carbon black composition with low conductivity and improved color A process for the ozone--oxidation of a carbon black is disclosed. The process employs a gas stream which comprises air and ozone, the type of gas stream typically generated by means of a corona discharge. The ozone--oxidized carbon black is generated by ... | 10/29/2002 |
| 6471763 | Oxidatively aftertreated carbon black An oxidatively aftertreated carbon black has a content of volatile constituents of more than 10 wt. %, based on its total weight, and the ratio of its CTAB surface area to the iodine adsorption number is greater than 2 m2 /mg. The carbon black ... | 10/29/2002 |
| 6136286 | Carbon black A carbon black having a ratio of a maximum absorbance in a range of 1800 to 1670 cm-1 to a maximum absorbance in a range of 1670 to 1500 cm-1 of not less than 0.65 on condition that a straight line interconnecting the absorbances at ... | 10/24/2000 |
| 6123759 | Carbon black, process for producing the same, and aqueous dispersion and water-base ink both containing the same A method for producing oxidation-treated carbon black, which comprises oxidizing carbon black by ozone in the presence of water until the total amount of acid groups of the carbon black becomes at least 3 μequ/m2.... | 09/26/2000 |
| 5500201 | Method of treating carbon black and carbon black so treated The physical and chemical properties of carbon blacks are modified by expng them to a room temperature gas plasma.... | 03/19/1996 |
| 5126019 | Purification of chlor-alkali membrane cell brine This invention relates to methods and systems for purifying brine for electrolysis in chlor-alkali cells, especially membrane cells by reducing the sulfate ion concentration, while at the same time minimizing the concentration of other undesireable ions s... | 06/30/1992 |
| 5094758 | Desalinization system and method A system and method are disclosed for desalinating sea water. The system includes an energy source such as a laser 13, and a container 19 (partly or wholly transparent) for holding the sea water, the sea water having sodium and chlorine ions and a solvent... | 03/10/1992 |
| 5085670 | Production of potassium chloride crystals Potassium chloride crystals of larger and/or more regular size are produced by conducting the crystallization in the presence of a small amount of a branched C12 monoalkylated diphenyl ether sulfonate or a linear C6 alkylated dipheny... | 02/04/1992 |
| 5086033 | Use of helium and argon diluent gases in modification of carbon molecular sieves Carbon molecular sieves, useful in the separation of air into oxygen and nitrogen, are improved through modification of the micropores of the sieve by contact with the pyrolysis products of a carbon-containing compound in the gaseous state diluted with he... | 02/04/1992 |
| 5030364 | Aqueous ultra-dilute composite solution An aqueous ultra-dilute composite solution, which comprises 1.4×10-7 to 2.7×103 ppm of a chlorine ion, and 4×10-12 to 4×10-3 ppm of a sodium ion or 7×10-8 to 1.3×103 ppm of an iron io... | 07/09/1991 |
| 4997637 | Digestive crystallizing process and apparatus for purification of KC1 Disclosed is a method of reducing the sodium chloride content of potassium chloride by forming an aqueous slurry of potassium chloride feed crystals having a wide particle size distribution with an average diameter of about 0.1 to about 50 microns in a li... | 03/05/1991 |
| 4986943 | Method for oxidation stabilization of pitch-based matrices for carbon-carbon composites An oxidation process for stabilization of pitch-based matrices in the fabrication of carbon-carbon composites. By oxidizing a fiber preform impregnated with petroleum-derived mesophase pitch at temperatures in the range of 190° to 300° C. for periods of... | 01/22/1991 |
| 4966764 | Process for producing low aluminum membrane cell feedbrine A process for controlling the concentration of aluminum in the brine of a membrane chlor-alkali cell is disclosed wherein the brine has its calcium carbonate settler solids digested in the calcium chloride flow stream by the addition of an inorganic miner... | 10/30/1990 |
| 4929280 | Hydroformylation of carbon black There is disclosed a process for hydroformylation of carbon black. The carbon black is hydroformylated by reacting carbon black with carbon monoxide and hydrogen under hydroformylation conditions in the presence of a hydroformylation catalyst and organic ... | 05/29/1990 |
| 4879335 | Black liquid colorant and polyester fibers dope-dyed therewith A black liquid colorant for dope dyeing of polyester fibers, comprising 5-50 wt % carbon black obtained by wet-oxidation with peroxide and subsequent neutralization of a gas phase oxidized carbon black, and 95-50 wt % liquid dispersion medium such as liqu... | 11/07/1989 |
| 4797981 | Process for the production of salt Process for the production of salt in which sodium chloride is crystallized in the form of spheres by evaporation of a sodium chloride brine and the spheres obtained are then broken up. The salt produced by the process is particularly suitable for the foo... | 01/17/1989 |
| 4755358 | Fluidized bed apparatus for the treatment of fluidized carbon black with gases Method for the treatment of fluidized carbon black with gases in a fluidized bed, wherein the carbon black and the treatment gases are conveyed for introduction in an unique operating procedure into the treating region in a countercurrent stream manner. T... | 07/05/1988 |
| 4755371 | Method for producing carbon black A process for producing a relatively coarse, highly structured carbon black having a large surface area. The method comprises mixing a hydrocarbon feedstock with hot combustion gases at a high temperature in a reaction chamber wherein turbulence and strea... | 07/05/1988 |
| 4747917 | Scale-free process for purifying concentrated alkali metal halide brines containing sulfate ions as an impurity A process for reducing sulfate ion concentrations in an alkali metal halide brine to be electrolyzed in an electrolytic cell comprises feeding the alkali metal halide brines to a reaction zone containing a slurry of gypsum crystals having a concentration ... | 05/31/1988 |
| 4631180 | Process for producing carbon black A process for producing carbon black in a reaction system comprising a first zone where a heating fuel material and an oxygen-containing gas are mixed, and a high temperature combustion gas stream is formed, a second zone where a hydrocarbon starting mate... | 12/23/1986 |
| 4631304 | Novel carbon black and process for preparing same Carbon black which has been treated with organic peroxides imparts high scorch resistance to rubber into which it has been compounded.... | 12/23/1986 |
| 4547197 | Treatment of brine elutriate The invention relates to the treatment of brine and more particularly the treatment of the brine elutriate drawn off after evaporation of the brine at an elevated temperature to separate some of the sodium chloride thereon. The crude brine normally contai... | 10/15/1985 |
| 4528168 | Brine saturator method of operation An apparatus is disclosed for dissolving salt in an undersaturated brine to bring the brine up to saturation conditions. A salt slurry, specifically sodium chloride, is brought into a holding tank and recycled to keep the solids suspended in the liquid. P... | 07/09/1985 |
| 4483841 | Carbon black production A carbon black reactor having tangential entry of combustion gases is provided with semicircular ramps to smoothly guide the flow of each tangentially introduced stream of combustion gases toward the reactor outlet enough to avoid turbulent impact with ot... | 11/20/1984 |
| 4483840 | Synthetic carbonaceous granules having high mechanical characteristics The invention relates to synthetic carbonaceous granules having high mechanical characteristics and, more particularly, the granules produced from anthracite fines. The invention also relates to a process for the preparation of these granules. These granu... | 11/20/1984 |
| 4460558 | Recovery of carbon black A heretofore waste gas stream containing nitrogen is used in the manufacture of carbon black.... | 07/17/1984 |
| 4450057 | Process for removing aluminum and silica from alkali metal halide brine solutions A process for removing dissolved aluminum and silica contaminants from concentrated alkali metal halide brines used in membrane electrolytic cells is disclosed. The process involves contacting an acidified brine at a pH of between about 2.0 and about 3.0 ... | 05/22/1984 |
| 4435377 | Oxidative after-treatment of carbon black The invention relates to a process for after-oxidation of carbon black powder with oxidants which are gaseous or are dispersed in the gas phase. A closed vertical cylinder is provided at its top with a carbon black input opening and a vent duct and at its... | 03/06/1984 |
| 4435378 | Process for removing extractable substances from carbon black A process for removing extractables from carbon blacks in a fluidized bed, wherein low extractable carbon blacks are treated under relatively mild temperature conditions (320° C.) with an oxygen containing gas and high extractable carbon blacks are treat... | 03/06/1984 |
| 4343781 | Decomposition of 2KCl.CuCl to produce cuprous chloride and potassium chloride Cuprous chloride is produced from the complex salt, 2KCl.CuCl, obtained as a by-product in the copper industry where chalcopyrite is decomposed in the presence of potassium chloride, by a series of steps involving reaction of an aqueous solution of the co... | 08/10/1982 |
| 4343621 | Process for the production of aqueous solutions of sodium chloride from rock salt The invention relates to an open dissolving chamber for rock salt and to a process for the production, free from vapors, of concentrated, aqueous sodium chloride crude brine by continuously dissolving rock salt in this dissolving chamber. The dissolving c... | 08/10/1982 |
| 4334885 | Production of potassium chloride from langbeinite An improved method of producing potassium sulfate from langbeinite. The improved method employs a "salting out" step to remove additional KCl from the mother liquor resulting from K2 SO4 crystallization. NaCl is added to the mother l... | 06/15/1982 |
| 4303624 | Purification of alkali metal chloride brines A method of purifying alkali metal chloride brine containing calcium ion impurities which comprises adding to the brine a proportion of an alkali metal carboxylate compound to form an insoluble calcium carboxylate precipitate, separating the insoluble car... | 12/01/1981 |
| 4248601 | Process for reducing the sodium chloride content of a potassium salt A process for reducing the sodium chloride content of crystalline potassium salts without the use of successive recrystallization. The crystalline potassium salts having a sodium chloride content greater than about 0.8 percent by weight are subjected to c... | 02/03/1981 |
| 4246251 | Method of producing carbon black A method of producing carbon black including the steps of burning hydrocarbon fuel, introducing a hydrocarbon feedstock into the combustion gases, quenching the carbon black and gases formed, pelletizing the carbon black with water, drying the pellets wit... | 01/20/1981 |
| 4228143 | Method of producing pelleted carbon black Flocculent furnace carbon black is produced by contacting a feed hydrocarbon with hot combustion gases to pyrolyze the feed hydrocarbon. The hot combustion products produced by pyrolyzing include flocculent carbon black suspended in gases and are quenched... | 10/14/1980 |
| 4221772 | Carbon black for lacquers and pigments There is prepared carbon black having the following properties: The carbon black is useful in producing gray lacquers, multi-colored lacquers and in making low viscosity and storage stable preliminary pastes suitable for use in lacquers.... | 09/09/1980 |
| 4138471 | Process for reducing the polycyclic aromatic hydrocarbon content of carbon black The amount of polycyclic aromatic hydrocarbons on the surface of a carbon black can be reduced below 2 ppb by heat treating the carbon black in a fluidized bed. Dried furnace carbon black pellets are charged in a fluid bed unit and preheated. The pellets ... | 02/06/1979 |
| 4132671 | Process for the preparation of carbon black pellets An adsorbent consisting of carbon black pellets, which is formed by aggregation with oil/fats/waxes and other distillation residues of the water containing carbon black separated during the partial gasification/partial combustion of solids and/or liquid c... | 01/02/1979 |
