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| Number | Title | Issue Date |
| 4355008 | Chlorination process There is described a method for producing alumina from a material containing alumina values via a chlorination step which process comprises the steps of: (A) dehydrating the material, if necessary, at a temperature of between about 500 and about 1300° K;... | 10/19/1982 |
| 4351814 | Hydrotalcites having a hexagonal needle-like crystal structure and process for production thereof Fibrous hydrotalcites having a hexagonal needle-like crystal structure. The fibrous hydrotalcites are produced by contacting a basic magnesium compound having a needle-like crystal structure and expressed by the following formula (2) wherein An... | 09/28/1982 |
| 4349516 | Process for treating the gas stream from an aluminum value chlorination process A method for producing aluminum chloride suitable for direct introduction into an aluminum chloride reduction cell by treatment of the gas stream emerging from an aluminum value source chlorination process comprising the steps of: 1. reducing and condensi... | 09/14/1982 |
| 4349420 | Fractional distillation process for the production of aluminum chloride Metal chlorides such as aluminum chloride (AlCl3) are separated from a mixture containing metal chlorides including AlCl3 and ferric chloride (FeCl3). In order to effect this separation, the mixture is subjected to a fract... | 09/14/1982 |
| 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 |
| 4332780 | Preparation of cis-diammine diodo platinum (II) A process for preparing cis - Pt (NH3)2 I2 from K2 PtI4 by adding NH4 OH under controlled conditions of temperature and pH.... | 06/01/1982 |
| 4331645 | Alumina from alkali metal-aluminum chloride complexes A method for the production of reduction cell grade alumina from alkali metal/aluminum chloride complexes comprising the steps of: A. reacting the alkali metal/aluminum chloride complexes with oxygen in a three phase fluidized bed comprising: (I) as a solid ph... | 05/25/1982 |
| 4289629 | Removal of contaminants from strongly alkaline solution The chloride ion and carbonate ion concentrations of a strongly alkaline solution can be reduced by the process of mixing sodium aluminosilicate into the solution, heating the resulting solution to a temperature of at least 90 degrees Celsius to form a so... | 09/15/1981 |
| 4278463 | Process for recovering cobalt Cobalt is recovered from byproduct streams from a basic process by contacting the byproduct streams with aluminum metal for a sufficient period of time to produce cobalt metal as a precipitate. The basic process is the type wherein cobalt ions in solution... | 07/14/1981 |
| 4273755 | Preparation of platinum complexes A process is provided for preparing cis-Pt(NH3)2 Cl2 and intermediates. As a step in the process the intermediate cis-Pt(NH3)2 I2 is prepared from K2 PtI4 by adding NH... | 06/16/1981 |
| 4263016 | Non-toxic, active filler for grinding disks, its use and grinding disk containing same In grinding disks, toxic lead chloride and antimony sulfide may be replaced by non-toxic alkali metal chloroferrates (II,III) produced by melting together alkali metal chloride, anhydrous ferric chloride and iron powder.... | 04/21/1981 |
| 4243555 | Composition for recovery of MG++ from brines Magnesium values are selectively recovered from salt brines, even salt brines which contain competing ions such as Li+, Ca++, and Sr++, by contacting the brine with an anion exchange resin which has dispersed therein a mic... | 01/06/1981 |
| 4171344 | Crystal growth from solution Crystals are grown from solution by the introduction of a first fluid into a second fluid by permeation through a porous partition. Introduction of the first fluid produces supersaturation of the desired material in the combined fluid in the vicinity of t... | 10/16/1979 |
| 4141960 | Complex bimetallic salts Bimetallic salts, having the generic formula MM'Xn wherein M is a Group IB metal, M' is a Group IIIA metal, X is a halide and n is equal to the sum of the valences of M and M', are prepared by reacting the halogen salts of the individual metals... | 02/27/1979 |
| 4138354 | Preparation of manganese/cobalt bromide A method for the preparation of manganese bromide and cobalt bromide using a manganese/cobalt redox system. Elemental manganese is reacted with a solution of cobalt bromide, forming manganese bromide and elemental cobalt. Subsequent reaction of the cobalt... | 02/06/1979 |
| 4110251 | Metal oxyhalide catalytic compositions Metal oxyhalides of the general formula ABO3-f Xf having perovskite-type crystal structures in which A and B are each cations of at least one metal and a portion of the type B cations are catalytically active; X is fluoride or chlori... | 08/29/1978 |
| 4100183 | Process for preparing cuprous aluminum tetrahalide complexing agents Cuprous aluminum tetrahalide complexing agents are prepared from cuprous halide such as cuprous chloride contaminated with cupric halide by a method which reduces the cupric ion to the cuprous ion by treating the contaminated cuprous halide with an organo... | 07/11/1978 |
| 4082624 | Articles electrodeposited with ruthenium and processes of producing such articles The ruthenium compound [Ru2 N(H2 O)2 Cl8 ]K3 is prepared by refluxing a mixture of hydrated water soluble ruthenium chloride, having approximately 40% ruthenium content, and sulphamic acid, the latter... | 04/04/1978 |
| 4082625 | Electrodeposition of ruthenium Articles are electroplated with ruthenium in plating bath containing ruthenium cationic complex [Ru2 N(NH3)8 X2 ]3+. Bath provides advantages of enabling plating in alkaline solution, where desired, a... | 04/04/1978 |
| 4078039 | Chlorination of titanium slags Recovery of titanium as a titanium tetrachloride from slags produced from ectrosmelting of relatively low content titanium bearing materials such as ilmenites.... | 03/07/1978 |
| 4076794 | Process for the production of high purity alkali metal tetrahaloaluminates and products produced thereby A process is described for the production of sodium, potassium or lithium tetrahaloaluminates, in which the halogen may be chlorine, bromine or iodine, by the reaction of an aluminum halide with at least the stoichiometric amount of an alkali metal halide... | 02/28/1978 |
| 4073872 | Process for producing a product containing aluminum and chlorine The invention provides a process for recovering aluminum values from aluminum-containing minerals, such as oxides of aluminum and aluminosilicates. The process involves heating an intimate mixture of an aluminum-containing mineral and a solid carbonizable... | 02/14/1978 |
| 4036776 | Recovery of chlorine values from a melt oxidation gas A molten mixture containing the higher and lower valent forms of a multivalent metal chloride; in particular, cuprous and cupric chloride, is contacted with oxygen, and aqueous hydrogen chloride recycle, to recover the chlorine values by generation of the... | 07/19/1977 |
| 4033902 | Cobalt-platinum catalyst The invention relates to a cobalt-platinum catalyst for promoting the addition of .tbd.Si-H compounds to unsaturated organic compounds which comprises reacting platinum dichloride with dicobalt octacarbonyl in the presence of an inert solvent at a tempera... | 07/05/1977 |
| 3997331 | Metallized salts A process and apparatus for producing certain metal salts in very fine particulate form. The process comprises cooling a solution of metal salt until the solution freezes and thereafter evaporating the solvent under very low pressure. The process is parti... | 12/14/1976 |
| 3979498 | Recovery of cesium and palladium from nuclear reactor fuel processing waste A method of recovering cesium and palladium values from nuclear reactor fission product waste solution involves contacting the solution with a source of chloride ions and oxidizing palladium ions present in the solution to precipitate cesium and palladium... | 09/07/1976 |
| 3960549 | Process for the separation and purification of platinum, rhodium and iridium This invention relates to a process for the separation and purification of platinum group metals and particularly platinum, rhodium and iridium. Essentially the platinum group metals are present as salts dissolved in an aqueous solution and the process fo... | 06/01/1976 |
| 3959446 | Synthesis of high purity, alpha phase silicon nitride powder A method is provided for preparing alpha silicon nitride powder in which very high purity, liquid silicon tetrachloride is reacted with an excess of ammonia gas in dry deoxygenated benzene or normal hexane at about 0°C, yielding a precipitate of silicon ... | 05/25/1976 |
| 3957505 | Gold reclamation process Gold is recovered from gold bearing materials by dissolving gold in an iodide-iodine solution, precipitating gold with a reducing solution, removing the precipitated gold and then regenerating the iodide-iodine solution with an oxidizing agent.... | 05/18/1976 |
| 3947556 | Zinc complexes of basic aluminum chlorides and methods of making same Alcohol soluble complexes of basic aluminum chlorides may be prepared by adding zinc bromide or chloride, or zirconyl bromide or hydroxybromide, or zinc or zirconyl mixtures of the above to an aqueous solution of five-sixths basic aluminum chloride, and d... | 03/30/1976 |
| 3947557 | Zinc complexes of basic aluminum bromides and methods of making same Alcohol soluble complexes of basic aluminum bromides may be prepared by adding zirconyl or zinc bromide or chloride, or zirconyl hydroxychloride or hydroxybromide, or mixtures of the above chlorides and bromides to an aqueous solution of five-sixths basic... | 03/30/1976 |
| 3947559 | Alkali metal dithionite manufacture A process for making an alkali metal dithionite by reacting sulphur dioxide with a basic alkali metal compound and one or both of formic acid and an alkali metal formate. The process is conducted in the presence of aqueous 2-methoxyethanol.... | 03/30/1976 |
| 3939188 | Preparation of zerovalent phosphine substituted rhodium compounds and their use in the selective carbonylation of olefins A process for preparing oxygenated products comprising aldehydes, which have high normal to branched-chain isomer ratios. The process involves using particularly characterized rhodium-containing complex catalysts under a specific combination of carefully ... | 02/17/1976 |
