Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7351343 | Copper metal recovery system The present invention generally relates to a copper metal recovery system, able to integrate with a waste treatment system of a circuit board manufacture plant, includes a stirring unit, a crystallization unit and a pressure filtering unit. More than 2 parts of weig... | 04/01/2008 |
| 7297315 | Method of recovering a cleaning agent The invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing copper oxide, a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing ... | 11/20/2007 |
| 7205153 | Analytical reagent for acid copper sulfate solutions Embodiments of the invention provide an analytical method and analytical reagent solutions for determining the concentration of electrolyte components, such as copper, acid and chloride constituents in an acid or basic metal plating bath using a chemical analyzer. C... | 04/17/2007 |
| 7122167 | Precious metal recovery from organics-precious metal compositions with supercritical water reactant A supercritical oxidation process carried out in water is capable of oxidizing “organics” in precious metal organic compositions such as heterogeneous (Pt/C) or homogeneous precious metal catalysts and producing a precious metal oxide with few by-products and lo... | 10/17/2006 |
| 6998069 | Electrode material for positive electrodes of rechargeable lithium batteries The electrode material for positive electrodes of rechargeable lithium batteries is based on a lithium transition metal oxide. Said lithium transition metal oxide is a lithium transmission metal mixed oxide with at least two transition metals (for example nickel and... | 02/14/2006 |
| 6860933 | Process for depositing layers of zirconium oxide using soluble powders A sol-gel process for producing layers of zirconium oxide is described which comprises the following stages: (i) production of a soluble, zirconium-containing powder by: (a) reaction of a zirconium alco... | 03/01/2005 |
| 6716403 | Method of recovering a cleaning agent The invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing copper oxide, a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing ... | 04/06/2004 |
| 6656390 | Preparation of energy storage materials A process is provided for the preparation of a metallic oxide composite including mixing an aqueous solution of a water-soluble metal compound and colloidal silica, depositing the mixture upon a substrate, heating the mixture-coated substrates at temperat... | 12/02/2003 |
| 5702575 | Method of preparing an electrochemical planar metal/metal oxide electrode An improved active electrode for use in planar sensors has been discovered, the electrode prepared by a process comprising combining a base component with a metal paste and heating the paste in the presence of air for a time sufficient to oxidize a portio... | 12/30/1997 |
| 5409686 | Process for producing yellow copper (I) oxide with narrow particle size range In a process of producing copper(I) oxide by the action of an aqueous solution of a mineral acid and of oxygen-containing gas on small-lump copper metal with continuous agitation, a temperature from 10° to 40° C., preferably from 15° to 35° C., is mai... | 04/25/1995 |
| 5152973 | Synthesis of submicron powders under reduced oxygen pressure The invention process provides a metal oxide, or oxides of more than one more metal, wherein the oxides have a mean particle size less than 1 micron. The oxides are made by steps including (1) reacting an aqueous solution of a metal salt (or salts) that f... | 10/06/1992 |
| 5089452 | Method for preparing catalyst precursor for methanol synthesis A method for preparing a catalyst precursor for methanol synthesis using copper sulfate recovered from low-cost copper etching waste solution as the source of copper, which comprises using recovered copper sulfate containing the mother liquor in the amoun... | 02/18/1992 |
| 5008017 | Method for recovering metals from waste liquors Waste liquors containing small amounts of silver salts are treated with aluminum hydroxide to produce a floc reduced in volume by the addition of an acid and mixed with a metal bicarbonate and metal carbonate in amounts sufficient to affect solidification... | 04/16/1991 |
| 4891067 | Processes for the treatment of smelter flue dust A process for the treatment of flue dust from copper and lead smelters includes the steps of subjecting a slurry (10) of water and flue dust to a first caustic leach (12) to form a first liquids soluble sulfate solution (14) and a first solids portion (15... | 01/02/1990 |
| 4764284 | Process for removing of heavy metal from water in particular from waste water Process for removing Sr and heavy metals from water in particular from waste water by throughly mixing it with a solution of an alkali metal carbonate and/or hydrogen carbonate in a reactor containing a fluidized bed of suitable bed material. The obtained... | 08/16/1988 |
| 4659555 | Process for the preparation of basic copper carbonate The invention relates to a process for the preparation of basic copper carbonate by reacting copper salts with alkali carbonate in aqueous solution at elevated temperatures and with stirring and subsequently isolating the copper carbonate. In this process... | 04/21/1987 |
| 4655829 | Metal recovery process Metal values are separated from arsenic sulfide ores in a hydrometallurgical oxidation process using a balanced reactant slurry. The molar concentration of As and Sb in the reactant slurry is controlled with respect to the molar concentration of Cu, Pb, a... | 04/07/1987 |
| 4652381 | Battery plant waste water treatment process A process of treating industrial waste water contaminated with environmentally unacceptable amounts of sulfuric acid and heavy metals such as lead, copper or zinc is disclosed which permits lowering of the concentration of the contaminants to a level perm... | 03/24/1987 |
| 4614640 | Process of producing copper (II) hydroxide Copper(II) hydroxide is produced by a reaction of copper oxychloride in an aqueous suspension with alkali hydroxide or alkaline earth metal hydroxide in the presence of a stabilizing agent and the product is separated and washed. To improve the stability ... | 09/30/1986 |
| 4585477 | Method for separating and recovering nickel and copper from complex materials A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating, for example with sulphuric acid, sulphur trioxide, metal sulphate... | 04/29/1986 |
| 4404169 | Process for producing cupric hydroxide In a process of producing cupric hydroxides, products having a high stability in storage will be obtained if phosphate ions are added to a suspension of copper oxychloride in an aqueous phase, the copper oxychloride is then reacted with alkali metal hydro... | 09/13/1983 |
| 4369164 | Recovery of copper from arsenical drosses by ammonium arsenate leach A process for leaching copper and arsenic from copper dross containing copper arsenide and separated from molten lead bullion comprises leaching the dross with an aqueous ammoniacal solution containing arsenate as the predominant anion under oxidizing con... | 01/18/1983 |
| 4297134 | Method of recovering gold A process for recovering gold from a raw material containing gold by treating the raw material with either aqua regia or hydrochloric acid to form chloroauric acid, extracting the chloroauric acid with an organic solvent and reducing the acid to precipita... | 10/27/1981 |
| 4267069 | Regeneration of activated carbon to increase its gold adsorption capacity A method of regenerating an activated carbon which has had its collecting capacity for gold adsorption reduced through use which includes the step of contacting the carbon with an aqueous copper salt solution having a pH of less than 6. The regeneration i... | 05/12/1981 |
| 4176160 | Process for purifying a zinc sulfate solution Process for purifying an iron containing zinc sulfate solution which comprises precipitating iron from said solution as a slurry in at least one of the following forms at a pH which is maintained lower than 4: basic sulfate, jarosite or goethite; filterin... | 11/27/1979 |
| 4150091 | Manganese ore leaching process The process of leaching manganiferous ocean nodule ores with HCl whereby the manganese and other metals present, such as iron, zinc, cobalt, nickel, copper, and like are converted from oxides, silicates or other insoluble forms to water soluble chlorides,... | 04/17/1979 |
| 4123499 | Recovering metal values from marine manganese nodules A method for selectively extracting metal values from manganese bearing ores such as marine nodules. The ore is initially leached to solubilize manganese and other desirable metals as nitrates. The resulting solution is then treated with manganous hydroxi... | 10/31/1978 |
| 4123500 | Recovery of precious metals by oxidation in the aqueous phase of associated carbonaceous support material This invention relates to the recovery of precious metals. More particularly, the invention relates to a process for the recovery of a catalytic metal from a carbonaceous residue or support comprising subjecting an aqueous slurry of material containing ca... | 10/31/1978 |
| 4118221 | Copper recovery from sulfate solutions containing nickel and cobalt Copper is separated from nickel present therewith in a sulfate solution by neutralizing to precipitate all the copper and some nickel as basic compounds, and thereafter reducing the copper in the basic compounds to elemental form through formation of cupr... | 10/03/1978 |
| 4065300 | Method for extraction of copper products from copper bearing material Cuprous oxide and finely divided metallic copper are recovered from copper bearing material by an improved chemical process involving the dissolving of the copper bearing material in a solution of ammonium nitrate having an excess of NO3.d... | 12/27/1977 |
| 4065542 | Two stage leaching of limonitic ore and sea nodules A process which enables cumulative recovery of nonferrous metal values from manganiferous sea nodules and a limonitic ore comprises treating the limonitic ore in an aqueous acidic medium under reducing conditions to extract nonferrous metals and iron from... | 12/27/1977 |
| 4018866 | Metal carbonate recycle to reduction circuit in the cuprion process A process in which copper, nickel, cobalt and molybdenum are recovered by direct leaching of comminuted raw manganese nodules after the nodules are reduced in a reduction circuit with an aqueous ammoniacal leach solution containing cuprous ions. An improv... | 04/19/1977 |
| 4007037 | Composition and method for chemically etching copper elements This invention resides in compositions and methods for chemically etching copper elements. The etching solution of this invention is composed of materials which can be easily regenerated and the copper metal etched from the copper element easily recovered... | 02/08/1977 |
| 3996046 | Extraction and purification of silver from sulfates A method is provided for extracting silver from a silver sulfate-bearing substance, such as oxide materials, metal or metal sulfate mixtures containing silver sulfate which comprises subjecting said substance to aqueous leaching to remove soluble salts th... | 12/07/1976 |
| 3990891 | Halidation of nonferrous metal values in manganese oxide ores This invention provides a process for obtaining the nonferrous metal values from a manganese oxide ore, by reacting the ore with an aluminum halide or a ferric halide at a temperature of at least about 50° C and preferably, at least about 130° C. The ma... | 11/09/1976 |
| 3986866 | Method of recovery of metal compounds and metals from nitrate solutions A method is provided for recovering metal compounds and metals from ores, concentrates, alloys and other metal containing materials. The material containing said metals is leached in an aqueous solution of nitric acid at atmospheric pressure and temperatu... | 10/19/1976 |
| 3981962 | Decomposition leach of sulfide ores with chlorine and oxygen Complex sulfide ores or concentrates are decomposed by treatment with a combination of chlorine and oxygen, the amount of chlorine being limited to that necessary to convert sulfides of the desired metals, such as zinc, lead, copper, cadmium, silver, nick... | 09/21/1976 |
| 3979265 | Recovery of metals from sulfur bearing ores Sulfur monochloride is reacted with an ore containing iron, sulfur and a metal which forms a water soluble ammine complex or an ammonium-containing double salt, to yield metal chlorides and sulfur. The metal sought is solubilized with an aqueous solution ... | 09/07/1976 |
| 3971652 | Ammoniacal extraction of copper from metallic materials A method of leaching copper values from copper dross obtained from pyro-metallurgical lead bullion by contacting finely-divided particles of the copper dross with an aqueous ammoniacal solution, preferably a solution of ammonium carbonate and ammonium hyd... | 07/27/1976 |
| 3970737 | Metal, particularly gold, recovery from adsorbed cyanide complexes The invention provides a method of recovering transition or noble metal values, particularly gold and silver values, from a support having absorbed thereon the metal values in the form of an ionic complex, particularly a cyanide ionic complex, by desorbin... | 07/20/1976 |
