Class 423/72 - Halogen containing

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes in which the compound also contains a halogen.
No. of patents: 22
Last issue date: 02/02/1999

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Number	Title	Issue Date
5866493	Method of manufacturing a sintered body of indium tin oxide According to the method, an aqueous salt solution containing either tin, indium or both, are mixed with an alkali to produce a slurry containing precipitated particles. Then, the slurry is maintained at a predetermined temperature range for a time suffici...	02/02/1999
5788948	Process for the production of fluorometallate salts useful in the processing of mineral sands and related materials The present invention relates to a process for the production of intermediates useful in the processing of mineral sands and related materials characterized in that the process comprises: (a) dissolving a metal fluoride or metal chloride compound in an organic...	08/04/1998
5225178	Extraction and purification of titanium products from titanium bearing minerals Titaniferous solid containing titanium (IV) oxide, for example ilmenite, is reacted with silicon tetrafluoride gas at 800° C. or more and at a pressure of at least 1 atmosphere to produce titanium tetrafluoride vapor and silica. The vapor is rapidly remo...	07/06/1993
5171549	Process for decreasing the level of impurities in zirconium chloride, titanium chloride and hafnium chloride An improved halogenator process and system is provided which significantly and economically decreases the level of impurities in the processing of various refractory metals and their halides and particularly hafnium tetrachloride which is condensed from g...	12/15/1992
4961911	Process for reducing carbon monoxide emissions from a fluidized bed titanium dioxide chlorinator A process for reducing the amount of carbon monoxide emitted from a fluidized bed reactor for chlorinating titanium bearing material containing iron oxide comprising (a) feeding coke, titanium bearing material containing iron oxide, and chlorine to the re...	10/09/1990
4943419	Process for recovering alkali metal titanium fluoride salts from titanium pickle acid baths A process for recovering alkali titanium fluoride salts suitable for commercial use from spent pickle acid liquors containing titanium by adjusting the fluoride to titanium mole ratio to critical ranges, adding an excess of alkali metal salt, and gently a...	07/24/1990
4937054	Method of regenerating ZrF₄ pickling solutions A process is disclosed for the regeneration of pickling solutions which contain ZrF4 by addition of a Na compound in which a charge of the pickling solution to be regenerated is analyzed and heated. The amount of Na required for the regeneratio...	06/26/1990
4923507	Process for opening ores The subject of the invention is a process for opening ores, particularly ores containing tantalum, niobium, zirconium and titanium, of the kind that includes the stages of leaching with mineral acids, solvent extraction, purification and separation of the...	05/08/1990
4910009	Ultra high purity halides and their preparation The process for purifying a contaminated chloro, bromo or iodo precursor salt of zirconium, hafnium or aluminum by means of providing a molten thermal body of one or more alkali or alkaline earth metal halides and the precursor salt containing impurities,...	03/20/1990
4885019	Process for making bulk heavy metal fluoride glasses Heavy metal fluoride glasses are made by a process that requires high purity fluoride constituent compounds fluorinated oxides, or premelted glass cullet. The charge is placed in an enclosed furnace chamber having the ability of atmosphere control, heat c...	12/05/1989
4780302	Process for the preparation of alkali metal fluotitanates Process for the preparation of alkali metal fluotitanates by fluorination of a titanium ore, reaction with an alkali metal compound, precipitation and separation of the formed alkali metal fluotitanates, wherein the titanium ore is mixed with a hydrofluos...	10/25/1988
4680044	Method of modifying the refractive index of fluoride glass The present invention relates to a method of producing a fluoride glass preform and/or fiber having a modified refractive index by heating the fluoride glass preform to a temperature that is above its glass transition temperature, but below its devitrific...	07/14/1987
4666486	Process for making bulk heavy metal fluoride glasses Heavy metal fluoride glasses are made by a process that requires high purity fluoride constituent compounds, some of which are further refined by sublimation. Handling occurs in a protective atmosphere such as argon. The charge is placed in a sealed modif...	05/19/1987
4652434	Chlorination of ores containing alkali or alkaline earth values The invention pertains to an entrained-downflow chlorination process of fine metalliferous ores particularly containing alkali and/or alkaline earth metals greater than about 0.3% by weight as the oxide. The process includes a quenching step following the...	03/24/1987
4578252	Method for preparing ultra-pure zirconium and hafnium tetrafluorides A method for preparing ultra-pure metal tetrafluorides in which 3d such as Fe impurities are separated from impure material by a combined vaporization-electrolytic separation procedure. Sublimation and distillation methods are disclosed in combination wit...	03/25/1986
4521384	Process for the production of nearly aluminium chloride-free titanium tetrachloride from titaniferous raw materials containing aluminum compounds Process for the production of a nearly aluminum chloride-free titanium tetrachloride from titaniferous raw materials containing larger quantities of aluminum compounds in a fluid bed with the addition of a reducing agent. In the process, sodium chloride i...	06/04/1985
4497779	Production of potassium hexafluotitanates using dilute hydrofluoric acid A process is provided for recovering fluorine from dilute hydrofluoric acid solutions, such as waste scrubber solution obtained in the treatment of phosphates. The dilute solution is used to react with oxidic titanium material to solubilize the contained ...	02/05/1985
4330342	Process for regenerating spent pickle liquid containing ZrF₄ A process for regenerating a spent HF-HNO3 pickle which contains ZrF4, which comprises heating said spent pickle to above 40° C., adding dissolved NaOH to said so-heated pickle, thereafter cooling said so-treated pickle to a tempera...	05/18/1982
4239531	Sponge ring feed for iodide crystal bar cells Using a self-supporting metal sponge ring compact in an Iodide Crystal Bar Cell, as opposed to a loose fill. The sponge ring is formed by compressing the metal into a self supporting sponge ring by any means including isostatic pressing or conventional ra...	12/16/1980
4196173	Process for removing mercury from a gas Mercury is removed from gases containing mercury vapor by passing the gases continuously through a bed of activated carbon on which a halogen is adsorbed. The bed may have a thickness of at most 5 cm. The chlorine content of the active carbon is maintaine...	04/01/1980
4164479	Method for calcining nuclear waste solutions containing zirconium and halides A reduction in the quantity of gelatinous solids which are formed in aqueous zirconium-fluoride nuclear reprocessing waste solutions by calcium nitrate added to suppress halide volatility during calcination of the solution while further suppressing chlori...	08/14/1979
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

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Class 423/72 - Halogen containing