Class 423/162 - Nitrating or ammoniating

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes including the step of chemically forming a compound
No. of patents: 22
Last issue date: 10/12/2010

Number	Title	Issue Date
7811535	Process for the preparation of magnesia (MGO) The present invention provides an improved process for the preparation of MgO of high purity >99% from salt bitterns via intermediate formation of Mg(OH)2 obtained from the reaction of MgCl2 and lime, albeit indirectly, i.e., MgCl2 i...	10/12/2010
7300539	Treatment of solid containing material derived from effluent A method of treating solid containing material derived from effluent or sludge from a plant for deinking paper, the material containing calcium in the form of one or more insoluble calcium compounds, the method including the steps of treating the material with an ac...	11/27/2007
7060246	Magnesium hydroxide particles, method of the production thereof, and resin composition containing the same Provided are magnesium hydroxide particles having a hexagonal crystal form and having an aspect ratio (H) which satisfies the following expression (I), 0.45·A·B	06/13/2006
6475457	Process for manufacturing potassium nitrate fertilizer and other metal nitrates A process for producing potassium nitrate and other metal nitrates from the chlorides, sulfates, oxides of these metals. The process uses nitrogen dioxide as a true fluidizing medium in shallow beds of the aforementioned solids at moderately elevated temp...	11/05/2002
6425973	Treatment of solid containing material derived from effluent A method of treating solid containing material derived from effluent or sludge from a plant for de-inking paper, the material containing calcium in the form of one or more insoluble calcium compounds, the method including the steps of treating the materia...	07/30/2002
6221322	Strontium nitrate and method for manufacturing same Low-cost, high-purity strontium nitrate that is low in Ba, Na, Ca, Cr, and other impurities and that is suitable for use in airbags or the like is provided. High-purity strontium nitrate having a Ba content of 0.01 wt % or lower, an Na content of 0.005 wt...	04/24/2001
6193945	Method of recovering calcium from waste material or contaminated natural calcic material Method of recovering calcium carbonate from waste material or contained natural calcic material. Calcium is recovered by prepariag an aqueous suspension the material containing calcium to be recovered and by lowering the pH of the suspension to pH	02/27/2001
5843389	Magnesium process The present invention provides a process for preparing a flame retardant quality magnesium hydroxide which includes providing a magnesium salt solution; and a source of ammonia; adding a stochiometric excess of ammonia to the solution to form a magnesium ...	12/01/1998
5514359	Process for making anhydrous magnesium chloride In a process for producing anhydrous magnesium chloride, the following combination of steps: drying impure salt containing hydrated magnesium chloride; establishing a solution of the hydrated magnesium chloride; removing insoluble impurities; reacting the...	05/07/1996
5476642	Magnesium hydroxide and process for production thereof Magnesium hydroxide of the formula Mg(OH)2 having a crystallite size in the direction greater than 150 Å and smaller than 500 Å, an aspect ratio in the range from 2 to 5, a strain in the direction not greater than 4.2×10-3	12/19/1995
4952379	Method for purifying calcium nitrate melt/solution which is separated from the mixture obtained by the solution of rock phosphate with nitric acid The present invention relates to a method for purifying calcium nitrate melt or solution separated from the mixture obtained by dissolution of rock phosphate with nitric acid. The melt contains fluorine and phosphorus as main contaminants. The mol-ratio p...	08/28/1990
4806323	Method for the removal of cadmium from acid phosphate-containing aqueous media Cadmium is removed from an acid, phosphate-containing aqueous medium with the aid of an anion exchanger, in which process, during the removal, iodide or bromide ions are present in a quantity of 100-6000 ppm calculated with respect to the acid phosphate-c...	02/21/1989
4743289	Lignosulfonate as granulation aid-particle hardener An improved process for more economically and effectively producing crystalline by-product ammonium sulfate (A/S) by granulating crystalline by-product A/S feedstock and recycle material together with an A/S-sulfuric acid-granulation aid-particle hardener...	05/10/1988
4589904	Granulation of crystalline by-product ammonium sulfate A process for granulating crystalline by-product ammonium sulfate, hereinafter referred to, for the sake of convenience, as A/S, to produce a product having excellent physical and chemical properties as they relate to the storage and handling thereof and ...	05/20/1986
4441993	Flotation process A process for recovering metallic values by putting the values into solution and separating undesired mineral matter from the solution using countercurrent flotation is provided. The process involves leaching metallic values from host rock, conditioning t...	04/10/1984
4421729	Preparation of strontium carbonate Strontium carbonate is prepared by the process of reacting strontium nitrate in an aqueous reaction medium with carbon dioxide to precipitate strontium carbonate product, the nitric acid byproduct that forms being neutralized by the introduction of lime t...	12/20/1983
4337233	Preparation of strontium nitrate from celestite and calcium nitrate Strontium nitrate is prepared by reacting celestite (strontium sulfate) with excess calcium nitrate in limited amounts of water, quickly extracting strontium nitrate from the reaction mixture by vigorous agitation with additional water, and recovering str...	06/29/1982
4328189	Apparatus for the granulation of precipitation products formed from ammonium compounds An apparatus for granulation of precipitation products, comprising a liquid-filled reaction chamber including a granulation chamber which receives aqueous streams of compounds which precipitate to form granules. The granulation chamber has an open upper e...	05/04/1982
4289736	Filtering of precipitating silica The addition of an excess of asbestos tailings in the course of the extraction of magnesium from asbestos tailings by digestion with an acid greatly facilitates the elimination of silica and other impurities by filtration of the resulting reaction mixture...	09/15/1981
4248838	Preparation of useful MgCl_2. solution with subsequent recovery of KCl from carnallite This invention outlines a process to beneficiate carnallite ores in such a way as to obtain anhydrous MgCl2 of sufficient purity to be used as feed for an electrolysis cell producing magnesium metal. Commercially acceptable potassium chloride a...	02/03/1981
4201750	Processing of breunnerite to recover magnesium compounds A process for the preparation of magnesium compounds from breunnerite or from mineral concentrates or tailings containing breunnerite in which the mineral is calcined and treated with an acid and the magnesium salt solution so formed is separated from ins...	05/06/1980
4187280	Process for recovering useable products from by-product ammonium nitrate formed in the manufacture of nuclear reactor fuels or breeder materials Radiation-contaminated ammonium nitrate is heated in solution to about 100° C. in the presence of finely powdered calcium oxide or lithium hydroxide. Ammonia and water vapor are given off leaving an alkaline or alkaline earth nitrate which can then be sa...	02/05/1980

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Class 423/162 - Nitrating or ammoniating