Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 7261820 | Method for decreasing a concentration of metal in aqueous solution A method and system for decreasing the concentration of at least one metal in an aqueous solution. The metal may be molybdenum, tungsten, or both. An aqueous solution is introduced into at least one reaction zone, and at least one source of hydroxide ions is provide... | 08/28/2007 |
| 7157063 | Process for the utilization of vanadium from chromium ore as vanadium (V) oxide Process wherein the vanadium present in the chromium ore chromite is recovered as vanadium pentoxide during the course of the fusion of the chromium ore with alkali and its work-up to produce sodium chromate solution and sodium dichromate. ... | 01/02/2007 |
| 7070685 | Method and device for decontaminating water which contains metal and/or is radioactively contaminated The invention relates to an efficient process and device for the decontamination of waters polluted with heavy metals, semimetals and/or radionuclides by cation exchange and electrochemical deposition of the anions. ... | 07/04/2006 |
| 7033841 | Process and compounds for use in detecting analytes by measurement of residual magnetism, and the use of the said compounds The invention relates to a process for quantitative detection of analytes in liquid and solid phases with the aid of binding remanence measurement, compounds that are suitable for this purpose, and their use in analytic chemistry. ... | 04/25/2006 |
| 6953565 | Process for producing ammonium polythimolybdate A process for producing an ammonium polythiomolybdate of the formula (NH4)2Mo3S13.n H2O where n is 0, 1 or 2 in which an aqueous ammoniacal molybdate solution is reacted with hydrogen sulfide gas in a closed sys... | 10/11/2005 |
| 6476287 | Sulfite treatment of spent industrial wastes A method of treating metal-contaminated spent foundry sand, or other industrial waste, by combining the sand with a sulfite to produce insoluble metal sulfur oxide complexes that do not leach from the sand. The treated waste may also be processed to reduc... | 11/05/2002 |
| 5415848 | Method for removal of hexavalent chromium from a solution A process for removing chromium from an aqueous electrolyte solution is disclosed. The process involves admixing with the solution an amount of a chromium-reducing compound and an amount of a precipitant for the anion of the chromium-reducing compound. Th... | 05/16/1995 |
| 5395601 | Re-calcination and extraction process for the detoxification and comprehensive utilization of chromic residues A re-calcination and extraction process for the detoxification and comprehensive utilization of chromic residues, comprising adding small amount of residue ore powder, sodium carbonate, or additionally, a certain amount of coke powder to the poisonous chr... | 03/07/1995 |
| 5393503 | Process for making chromic acid Disclosed is an improvement on a process in which sodium chromate is reacted with sulfuric acid to produce sodium bichromate and sodium sulfate, and the sodium bichromate is reacted with sulfuric acid to produce chromic acid and sodium bisulfate. In the i... | 02/28/1995 |
| 5336475 | Process for chromium removal using an inorganic sulfur compound A method has been devised for removing chromium ions from a chromium ion containing liquid and recovering chromium oxide in a usable form by (a) adjusting the temperature of the liquid to an optimal temperature to maximize reduction and simultaneous preci... | 08/09/1994 |
| 5171547 | Recovery of chromium in high purity state from waste materials of etching operations The present invention is directed to a method for treating a sludge containing substantial amounts of chromium, aluminum, calcium, iron, and phosphorous. The method comprises forming a slurry of the sludge; reacting the slurry with an acid to dissolve sub... | 12/15/1992 |
| 5122238 | Efficient electrolytic method of making chromic acid from sodium bichromate Disclosed is a method of making chromic acid by electrolyzing an aqueous solution of sodium bichromate until the sodium bichromate is converted to chromic acid at a bichromate percent conversion of about 1 to about 48.4. Sulfuric Acid is then added to the... | 06/16/1992 |
| 4968503 | Process for the production of sodium dichromate A process for the production of sodium dichromate comprising reacting sodium chromate with acids, the acids being sulfuric acid and NaHSO4 formed as a waste product in the production of CrO3 and thus being contaminated with chromium ... | 11/06/1990 |
| 4966760 | Method for recovering chromium from chromium-bearing material A method for recovering chromium from chromium-bearing material which comprises heating the material which can contain any one or combination of Co, Ni, Fe, Mo, and W with solid alkali metal hydroxide in an oxidizing atmosphere at 600° C.-1000° C. to fo... | 10/30/1990 |
| 4961910 | Recovery of tungsten and molybdenum Methods are disclosed for recovering one or more of the metals of tungsten and molybdenum from metal-cellulose material. One method involves digesting the material in a mineral acid selected from the group consisting of hydrochloric acid having a concentr... | 10/09/1990 |
| 4956154 | Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions Aqueous effluent solutions containing metal cations may be treated with an extractant comprising an organophosphinic acid, a di-2-ethylhexyl phosphoric acid and/or an aliphatic amine to selectively separate chromium, nickel, cobalt, copper and lead cation... | 09/11/1990 |
| 4910000 | Method of extracting tungsten values from tungsten containing ores A method of extracting tungsten values from tungsten containing ores comprising step (i) forming a mixture of a tungsten containing ore and a first mineral acid adapted to consume acid consuming substances in the ore and step (ii) thereafter adding organi... | 03/20/1990 |
| 4872909 | Process for acid leaching of manganese oxide ores aided by hydrogen peroxide A method of processing manganese ore by adding the ore to an aqueous solution of acid and H2 O2 to form a leach pulp. The leach pulp is agitated for a predetermined time period at predetermined temperatures. The leach pulp is then se... | 10/10/1989 |
| 4741886 | Process for recovering tungsten from tungsten bearing material containing arsenic A process is disclosed for recovering tungsten from tungsten bearing material containing arsenic. The process involves adjusting a water slurry of the material to a pH of less than about 4 with an acid to solubilize the major portion of the tungsten, addi... | 05/03/1988 |
| 4684472 | Precipitation of waste chromium compounds utilizing an aqueous sulfide solution In accordance with the present invention, the chromium content of an aqueous waste containing significant amounts of at least one soluble chromium compound, such as blowdown waters from cooling towers utilizing chromium-containing materials as corrosion i... | 08/04/1987 |
| 4668483 | Process for recovery of chromium A process is disclosed for recovering chromium from a chromium bearing material containing cobalt, molybdenum, and tungsten. The process involves roasting the material and alkali metal compound at a temperature of at least about 400° C. for a sufficient ... | 05/26/1987 |
| 4657745 | Value recovery from spent alumina-base catalyst A process for the recovery of aluminum and at least one other metal selected from the group consisting of molybdenum, nickel and cobalt from a spent hydrogenation catalyst comprising (1) adding about 1 to 3 parts H2 SO4 to each part ... | 04/14/1987 |
| 4626280 | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material A process is disclosed for recovering tungsten, iron, and manganese from tungsten bearing material. The process involves digesting the material in a sulfur dioxide solution at a sufficient temperature for a sufficient time to form a digestion solution con... | 12/02/1986 |
| 4624703 | Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material A process is disclosed for recovering tungsten, scandium, iron, and manganese from tungsten bearing material. The process involves digesting the material in sufficient sulfuric acid at a sufficient temperature for a sufficient time in the presence of a re... | 11/25/1986 |
| 4554138 | Leaching metals from spent hydroprocessing catalysts with ammonium sulfate A process for enhancing recovery of metals, especially cobalt, from spent hydroprocessing catalysts when the spent catalyst particles are first roasted at between 400° C. and 600° C. and then contacted with a first aqueous solution of ammonia and an amm... | 11/19/1985 |
| 4417997 | Method for recovery of metals from spent iron-chrome shift catalyst and method of forming new catalyst The Abstract of the Invention is a method of making a solution of the nitrates of iron and chromium from a spent catalyst containing oxides of iron and chromium, which method comprises: (a) dissolving the catalyst in sulphuric acid; (b) reacting the resulting ... | 11/29/1983 |
| 4332584 | Recovery of potential energy and chromium values from leather tannery wastes A method of recovering chromium values and potential energy from liquid and solid leather tannery wastes comprising pyrolyzing the tannery wastes to produce a burnable fuel product comprising gases and liquids and a substantially solid chromium-containing... | 06/01/1982 |
| 4278644 | Process for partitioning Mo and W from a mixed CaMoO4 -CaWO4 precipitate Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbo... | 07/14/1981 |
| 4222872 | Reclamation of molybdenum or other heavy metals from wastewater treatment skimmings Molybdenum or other heavy metal anions and ferric sulfate are reclaimed from wastewater skimmings, that result from treatment of wastewaters through formation of insoluble heavy metal ferric salts and flotation, by treating the skimmings with aqueous caus... | 09/16/1980 |
| 4162294 | Process for working up nonferrous metal hydroxide sludge waste A method for treating nonferrous metal hydroxide sludge waste to separate and recover the nonferrous metals therein wherein the waste is first mixed with an alkali hydroxide or carbonate, dried, and then roasted and the water-insoluble residue in the roas... | 07/24/1979 |
| 4120934 | Method for working-up shale The invention is a method for working-up shale while recovering metals therefrom and the sulphur content thereof. The method comprises crushing the shale and leaching and roasting the shale. The sulphur content is oxidized and converted into sulphuric aci... | 10/17/1978 |
| 4108596 | Recovery of chromium values from waste streams by the use of alkaline magnesium compounds A process and a product formed thereby for the recovery of chromium values from aqueous solutions (e.g., waste liquors) comprises contacting an acidic solution containing sulfate ion and trivalent chromium ion with at least about 4 molar equivalents of Mg... | 08/22/1978 |
| 4039613 | Process for production of hydrogen and sulfur from hydrogen sulfide as raw material Sulfur and hydrogen are produced from hydrogen sulfide according to the present invention by bringing hydrogen sulfide into contact, at a temperature exceeding the boiling point of sulfur, with at least one member selected from the group consisting of the... | 08/02/1977 |
| 4029734 | Recovery of chromium values Chromium values may be recovered from the chromium bearing ores or sources by subjecting the chromium bearing source to a roast in the presence of sulfuric acid and an oxidant which contains manganese compounds at temperatures ranging from about 200° to ... | 06/14/1977 |
| 4028463 | Recovery of manganese values Manganese values may be recovered from manganese bearing sources by subjecting said source to a roast in the presence of sulfuric acid and a reductant which comprises a chromium-containing compound at temperatures ranging from about 200° to about 500° C... | 06/07/1977 |
| 3988418 | Hydrometallurgical production of technical grade molybdic oxide from molybdenite concentrates An improved hydrometallurgical method is provided for producing technical grade molybdic oxide from molybdenite concentrates. According to this method, the molybdenite concentrates are leached in an acid medium having a nitric acid concentration between a... | 10/26/1976 |
| 3936494 | Naphthenohydroxamic acid preparation Naphthenohydroxamic acid is prepared by reaction at 25°C to 30°C, equimolar quantities of A. an ester of naphthenic acid, B. hydroxylamine dissolved in an alcohol/water/alkali metal sulfate slurry wherein the water content of the slurry is insufficient to hy... | 02/03/1976 |
| 3933972 | Process for preparing pure sodium bichromate Processes for preparing vanadium- and chlorine-free sodium bichromate which comprises concentration of a sodium chromate liquor so as to cause formation of crystals of neutral sodium chromate tetrahydrate, separation of these crystals from their mother li... | 01/20/1976 |
| 3932580 | Process for purifying technical grade molybdenum oxide A method for purifying technical grade molybdenum oxide derived from the roasting of molybdenite concentrates by which the molybdenum oxide feed material is admixed with sulfuric acid and pugged to form a plurality of reaction pellets which are heated to ... | 01/13/1976 |
