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| Number | Title | Issue Date |
| 4164417 | Process for recovery of niobium values for use in preparing niobium alloy products The invention disclosed provides a process for recovering niobium values from aqueous hydrofluoric acid solutions by evaporating said solution to dryness and baking the residue at temperatures of 150° to 250° C. The solid residue is niobium oxyfluroide ... | 08/14/1979 |
| 4152406 | Self-clinkering NF4+ compositions for NF3 -F2 gas generators and method of producing same Improved NF4+ compositions for solid propellant NF3 -F2 gas generators are described which produce NF3 and F2 free of gaseous Lewis acids and do not require clinker forming additives for their ... | 05/01/1979 |
| 4115529 | Halogen hydrate formation from halogen and finely divided aqueous droplets Halogen hydrates, such as chlorine hydrate, are made by directing finely divided droplets of an aqueous medium onto a refrigerated surface which is at a temperature below that at which the hydrate forms, while also contacting said surface and said aqueous... | 09/19/1978 |
| 4111991 | Process for making halogen salts A process for making halogen salts which comprises reacting elemental halogen, hydrazine or a hydrazine compound, and a compound selected from the oxides and hydroxides of alkali metals, alkaline earth metals, Zn, Bi, Sn(II,IV), and Mn(II), the carbonates... | 09/05/1978 |
| 4108965 | (NF4)2 NiF6 High energy solid propellant oxidizer and method of producing the same The combination of the strongly oxidizing NF4+ cation with the strongly oxidizing NiF6-- anion in the form of the stable salt (NF4)2 NiF6 produces a powerful oxidizer, useful for soli... | 08/22/1978 |
| 4089936 | Production of hydrogen fluoride Ammonium fluoride is converted into a bifluoride by reaction with KF to form KF.HF, converting the latter to NaF.HF and heating said sodium bifluoride to form a solid product comprising NaF.... | 05/16/1978 |
| 4087515 | Process for the production of alkali metal chlorites Alkali metal chlorites are produced by the reaction of chlorine dioxide with an alkali metal amalgam in a reaction mixture where the pH is maintained at from about 9.5 to about 11.5 by providing an excess of the alkali metal to the chlorine dioxide of at ... | 05/02/1978 |
| 4082839 | Preparation of sulfur fluorides A process, which may be continuous, for preparation of sulfur fluorides by reacting a sulfur chloride component with a fluorine containing component selected from the group consisting of nitrosyl fluoride and nitrosyl fluoride-hydrogen fluoride complex.... | 04/04/1978 |
| 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 |
| 4070447 | Process for preparing anhydrous aluminum fluoride Ammonium tetrafluoroaluminate particles having an average particle size above 50μ are reacted with an aluminum compound such as aluminum hydroxide or oxide first at a temperature of 250° C to 300° C and then at a temperature of 350° to 500° C to form... | 01/24/1978 |
| 4067957 | Process for producing hydrogen fluoride from an aqueous hydrofluorosilicic acid solution Potassium fluoride and silica are reacted with an aqueous solution of hydrofluorosilicic acid. The resulting potassium fluorosilicate is recovered. The potassium fluorosilicate may be further reacted with ammonia in water to form an aqueous mixture of amm... | 01/10/1978 |
| 4062929 | Production of hydrogen fluoride Hydrogen fluoride is produced from hydrofluosilicic acid. The hydrofluosilicic acid is reacted with ammonia. An aqueous solution of ammonium fluoride thus produced is fed with partly recycled alkali metal fluoride to a continuously operated reactor where ... | 12/13/1977 |
| 4056604 | Production of hydrogen fluoride Hydrogen fluoride is recovered from hydrofluosilicic acid by-product of phosphoric acid manufacture. The hydrofluosilicic acid effluent is reacted with ammonia to form ammonium fluoride which is converted to a bifluoride by reaction with an excess of solu... | 11/01/1977 |
| 4044103 | Storage-stable sodium chlorite Sodium Chlorite is made stable under storage conditions by (1) admixing with the sodium chlorite a stabilizing salt chemically inert to sodium chlorite and having at least one hydrate whose melting point is higher than about 50° C, in amount such that sa... | 08/23/1977 |
| 4012492 | Synthesis of anhydrous metal perchlorates Preparation of titanium tetraperchlorate, vanadium perchlorate, and chromyl erchlorate by the reactions of chlorine perchlorate with the respective anhydrous metal chlorides at a temperature from about -45° C to about 20° C. These perchlorates are useful... | 03/15/1977 |
| 4010249 | Process for the preparation of hydrogen Hydrogen is produced from water by the addition of heat to a series of chemical reactions which comprise the reaction of cadmium with water, and the subsequent recovery of the cadmium for re-use. The equipment used to produce the hydrogen requires only th... | 03/01/1977 |
| 4008130 | Method for distilling a ternary azeotrope of fluorosilicic acid, hydrogen fluoride and water Fluorosilicic acid solutions, which normally undergo decomposition when distilled, thereby creating unwanted forms of SiO2, are rendered stable during distillation by providing in the fluorosilicic acid solution an amount of HF which is at leas... | 02/15/1977 |
| 3997462 | Sodium chlorite containing granules Novel granules containing sodium chlorite have an apparent specific weight between 1.3 and 1.45 kg/dm3 and are prepared from an aqueous medium containing sodium chlorite, by the steps of passing the medium into a fluidized bed drier for evaport... | 12/14/1976 |
| 3976757 | Method for increasing the productivity of chemical reactors 1. In the vapor phase reaction of F2 with a member selected from the group consisting of ClF3, Cl2, BrF3, BR2 and SF4, at elevated pressures and temperatures in a chemical reactor, carried out ... | 08/24/1976 |
| 3975501 | Formation of a fluorine compound and the compound 1. The process for making dichlorofluoramine which comprises introducing into a reaction zone an alkali metal azide, subjecting said azide in said zone to the action of chlorine monofluoride while maintaining in said zone temperatures above the boiling po... | 08/17/1976 |
| 3974265 | Chlorine pentafluoride complexes 1. Compounds of the formula: wherein X is a member selected from the group consisting of As and Sb.... | 08/10/1976 |
| 3969486 | Process for synthesis of chlorodifluoroamine A process of making chlorodifluoroamine by introducing gaseous fluorine azide and at least a stoichiometric equivalent of gaseous chlorine into a reaction zone maintained at a temperature of 20° to 100°C.... | 07/13/1976 |
| 3969487 | Process for synthesis of chlorodifluoroamine A process for making chlorodifluoroamine by introducing a mixture of an inert gas and elemental fluorine into a reaction zone containing a mixture or alkali metal azide and alkali metal chloride at a reaction temperature not substantially above 50°C.... | 07/13/1976 |
| 3968200 | Reactor effluent quench system Process for recovering hydrogen chloride from an aqueous hydrogen chloride off-gas from an oxychlorination reaction wherein hydrogen chloride is separated from the off-gas as an aqueous solution of hydrogen chloride and employed as feed to an oxychlorinat... | 07/06/1976 |
| 3968050 | Oxidation of molten salts and recovery of chlorine values In the oxidation of a molten salt, such as copper chlorides with the simultaneous recovery of chlorine values, as chlorine and/or hydrogen chloride, oxygen is introduced into a lower bed and chlorine values are introduced into an upper bed for contact wit... | 07/06/1976 |
| 3967039 | Coated alkali metal chlorite particles In order to reduce the tendency to decompose of particles or granules of alkali metal chlorites and to enhance their stability, said particles or granules are completely coated with an inorganic salt or a mixture of such salts which are compatible with th... | 06/29/1976 |
| 3956472 | Removal of boron from magnesium chloride brines Minute amounts of boron present in naturally occuring brines found in oceans, inland seas, salt lake and the like are removed by treating the brine with a fluoride ion.... | 05/11/1976 |
| 3950500 | Method of producing chlorine dioxide Chlorine dioxide is produced by the reaction of sodium chlorate with sulfur dioxide in the presence of gaseous chlorine.... | 04/13/1976 |
| 3944647 | Recovering chlorine from the chlorination of titaniferous material Vapor feed containing titanium tetrachloride and ferric chloride vapor is contacted with sodium chloride for complexing said ferric chloride as liquid sodium ferric chloride salt complex while leaving titanium tetrachloride as vapor residue. The salt comp... | 03/16/1976 |
| 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 |
