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| Number | Title | Issue Date |
| 7270796 | Ammonium/ammonia removal from a stream In one embodiment, an ammonium removal method can comprise: removing a multivalent cation from a stream comprising ammonium to form a treated stream; converting the ammonium in the stream to ammonia by increasing the pH of the stream; and separating the ammonia from... | 09/18/2007 |
| 7261867 | Production of silver sulfate grains using organo-sulfate or organo-sulfonate additives An aqueous precipitation process for the preparation of particles comprising primarily silver sulfate, comprising reacting an aqueous soluble silver salt and an aqueous soluble source of inorganic sulfate ion in an agitated precipitation reactor vessel and precipita... | 08/28/2007 |
| 7258848 | Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide The present invention provides a process for removing ammonia as an aqueous salt solution from an acid gas comprising ammonia and hydrogen sulfide. A strong acid, such as sulfuric acid, is used as a scrubbing agent to convert ammonia to an ammonium salt. Control of ... | 08/21/2007 |
| 7223375 | Emission control systems and methods thereof A method and system for controlling one or more emissions includes introducing ammonia to react with at least a portion of sulfur trioxides in an exhaust emission and result in at least one or more ammoniated compounds. At least a portion of fly ash particles and th... | 05/29/2007 |
| 7204968 | Method of producing heat energy Energy in the form of heat is recoverable and controllable in a process that reacts an acid and a base in the presence of steam. The recovered heat energy can be used to vaporize water to form steam which when used in conjunction with a turbine will produce electric... | 04/17/2007 |
| 6652819 | Production of high purity vanadium compound from vanadium-containing carbonaceous residues A process for the production of a vanadium compound from carbonaceous residues containing vanadium, which includes the steps of: (a) combusting the carbonaceous residues at a temperature of 500-690° C. in an oxygen-containing gas to form vanadium-containi... | 11/25/2003 |
| 6419887 | Process for the treatment of residual liquors from the ammoniation and carbonation of alkali metal salts A process for the treatment of residual liquors from the ammoniation and carbonation of alkali metal salts containing ammonium salts, sodium salts, soluble sodium bicarbonate, ammonium bicarbonate and water and producing purified ammonium salts, comprisin... | 07/16/2002 |
| 6117406 | Process for manufacturing ammonium salts A process for manufacturing ammonium salts using a reactor which includes a first tubular reaction chamber having at least one acid feed and at least on ammonia feed which are arranged in a first up-stream part of the reactor. At least one second ammonia ... | 09/12/2000 |
| 5958358 | Oriented polycrystalline thin films of transition metal chalcogenides A method of preparing a polycrystalline thin film of a transition metal chalcogenide of an orientation on a substrate which includes (a) depositing a layer of a transition metal material or mixtures thereof on the substrate; and (b) heating the layer in a... | 09/28/1999 |
| 5814292 | Comprehensive energy producing methods for aqueous phase oxidation An aqueous phase oxidization process for the oxidization of any nonoxidized feed material using a mixture of a feed material, an oxidizing acid, such as nitric acid; oxygen gas, water and preferably a stabilizing acid, such as sulfuric acid. The mixture i... | 09/29/1998 |
| 5763652 | Process for producing a carboxylic acid A nitrile compound or an amide compound is hydrolyzed in the presence of an inorganic acid or other acidic catalyst or an alkali metal hydroxide or other basic catalyst, and the by-produced ammonium salt of the acidic catalyst or the produced salt of a ca... | 06/09/1998 |
| 5618511 | Process for producing ammonium sulfate from flue-gas scrubber waste liquor A flue-gas scrubbing-liquor regeneration process that is based on contacting N-S compounds contained in a flue-gas scrubbing liquor with a lime/limestone solution in a double draw-off crystallizer under suitable pH conditions for precipitating calcium sal... | 04/08/1997 |
| 5324500 | Method for processing residues of barium sulfide or strontium sulfide leaching A method for treating residues of barium sulfide or strontium sulfide leaching with waste sulfuric acid and hydrochloric acid, which method significantly decreases the amount of residual material which must be disposed of.... | 06/28/1994 |
| 5266297 | Liquid oxidizing method and apparatus A liquid oxidizing system has a closed circuit in which a liquid containing matter to be oxidized is circulated. The circuit is provided with an ejector for forming a jet stream of the liquid into which oxygen, or both oxygen and an oxidizing catalyst are... | 11/30/1993 |
| 5122352 | Heat exchanger and pollutant removal system A system for cooling flue gases from a fossil fuel boiler plant, and removing pollutants from the flue gas, is disclosed. In a first section of the apparatus, heat exchange cools the flue gas to just above the condensation point of water, and condensed H | 06/16/1992 |
| 4806638 | Neutralization of reaction mixtures obtained by Beckman rearrangement of cyclohexanone oxime Reaction mixtures obtained by Beckmann rearrangement of cyclohexanone oxime with sulfuric acid or oleum are neutralized by a process which comprises the following steps: (a) mixing the reaction mixture with recycled ammonium sulfate mother liquor whose co... | 02/21/1989 |
| 4759934 | Process for preparing high protein bread with ascorbic acid and product A technique for producing baked products, such as bread with very high protein levels, up to about 45% on a dry basis (18 to 25% on a wet basis), by incorporating in the unrisen dough the desired high protein levels, large amounts of ascorbic acid, e.g. 4... | 07/26/1988 |
| 4564504 | Apparatus for producing an acid compound Apparatus for producing an acid compound wherein an aqueous medium is pumped through a first reactor into which ammonia is injected. The first reactor comprises a venturi with a mixing deflector in the throat of the venturi. The ammonia is introduced to t... | 01/14/1986 |
| 4440734 | Process for the recovery of sulfuric acid The disclosure describes the recovery of sulfuric acid from industrial liquors containing the same. A selective liquid-liquid extraction of said liquors is carried out under conditions producing an organic phase containing the sulfuric acid and an aqueous... | 04/03/1984 |
| 4314975 | Method for preparing titanium tanning agent The present invention relates to methods for preparing a titanium tanning agent from sulphuric-acid titanium-ferriferous solutions and use thereof for leather tanning. The method for preparing a titanium tanning agent from titanium-ferriferous sulphate so... | 02/09/1982 |
| 4308049 | Process for the absorption of ammonia in acid solutions or slurries A process is disclosed for the absorption of gaseous or liquid ammonia in acid solutions or slurries, including an ammonia absorption zone separated from a water vapor generation zone disposed at a higher level. A pressure difference is created between th... | 12/29/1981 |
| 4284832 | Conversion of CS (tear gas) to o-chlorostyrene and ammonium sulfate Tear gas or CS (o-Chlorobenzalmalononitrile) has two nitrile functional gps which, when removed, effects the chemical conversion of bulk CS to o-chlorostyrene. This involves a first step, an acid or base catalyzed hydrolysis of CS to o-chlorocinnamic aci... | 08/18/1981 |
| 4269817 | Production of chlorine from chloride salts A process for converting chloride salts and sulfuric acid to sulfate salts and elemental chlorine is disclosed. A chloride salt and sulfuric acid are combined in a furnace where they react to produce a sulfate salt and hydrogen chloride. Hydrogen chloride... | 05/26/1981 |
| 4224142 | Treatment of recycled ammonium sulfate-bisulfate solution Ammonium sulfate-bisulfate solution contaminated with metal and other ash producing contaminants is treated by adjusting the pH of the solution to the range that produces a precipitate of the contaminant by the addition of ammonia or ammonium hydroxide; c... | 09/23/1980 |
| 4138472 | Process for obtaining coarsely crystalline pure ammonium sulfate A process for obtaining coarsely crystalline pure ammonium sulfate from reaction mixtures which have been obtained by Beckmann rearrangement of cyclohexanone-oxime with sulfuric acid or oleum, by neutralizing the mixtures with ammonia at an elevated tempe... | 02/06/1979 |
| 4081442 | Process for the recovery of &3xb5;-caprolactam from a reaction mixture of &3xb5;-caprolactam and sulphuric acid A process for removing sulfuric acid from reaction mixtures containing sulfuric acid and &3xb5;-caprolactam by treating the sulfuric acid with ammonia and sulfur dioxide to produce ammonium sulfate salts and reducing the ammonium sulfate salts to ammonia ... | 03/28/1978 |
| 4034068 | Process for preparation of ammonium tetrafluoroaluminate An inorganic acid typified by H2 SO4 is added to an aqueous slurry of (NH4)3 AlF6 and either Al(OH)3 or Al2 O3, and the resulting mixture is kept for a while under the ... | 07/05/1977 |
| 4015946 | Process for recovering ammonium sulphate from aqueous solutions of ammonium sulphate which contain organic compounds A process for recovering ammonium sulphate from an aqueous ammonium sulphate solution containing organic contaminants is disclosed. The aqueous solution is contacted with an organic substance which is water soluble and which is capable, in combination wit... | 04/05/1977 |
| 3937789 | Process for the neutralization of acid solutions of caprolactam A process is disclosed in which the heat generated, during neutralization, y ammonium sulfate of a solution of .xi.-caprolactam in sulfuric acid, is used to effect evaporation of water present, and the temperature is kept at about 40°C to 50°C, under sub... | 02/10/1976 |
| 3935100 | Process for the treatment of waste waters containing sulfuric acid and/or ammonium sulfate Process for treating a waste water containing sulfuric acid and/or ammonium sulfate comprising (1) reacting said water with barium sulfide to form barium sulfate, (2) reacting the latter with carbon containing inorganic impurities, at high temperature, th... | 01/27/1976 |
