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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...
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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...
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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...
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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...
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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...
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5476642 |
Magnesium hydroxide and process for production thereof
Magnesium hydroxide of the formula Mg(OH) 2 having a crystallite size in the direction <004> greater than 150 Å and smaller than 500 Å, an aspect ratio in the range from 2 to 5, a strain...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4248838 |
Preparation of useful MgCl.sub.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 MgCl 2 of sufficient purity to be used as feed for an electrolysis cell producing magnesium...
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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...
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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...
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3634029 |
PRODUCTION OF FEED GRADE DICALCIUM PHOSPHATE FROM MIXTURES OF PHOSPHORIC AND NITRIC ACIDS
Feed grade dicalcium phosphate is produced from mixtures of phosphoric and nitric acids wherein the H 3 PO 4 /HNO 3 molar proportion ranges from 0.5 to 9.0, the phosphate being precipitated by...
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3525585 |
PROCESS OF PREPARING WATER-SOLUBLE PHOSPHATES
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3515534 |
RECYCLING AMMONIUM SULFATE IN NITRIC PHOSPHATE PROCESSING
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3512942 |
APPARATUS FOR MINING AND REFINING PHOSPHORUS
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3512927 |
CHEMICALLY TREATING PHOSPHORITE AND OBTAINING SEPARATE PRODUCTS OF FLUORINE AND OF PHOSPHORUS
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3497329 |
PRODUCTION OF PHOSPHORIC ACID
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3436175 |
METHOD OF PRODUCING AMMONIUM SULFATE,POTASSIUM SULFATE AND MAGNESIUM OXIDE FROM LANGBEINITE
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3427125 |
PROCESS FOR PREPARING HIGHLY PURE CALCIUM HYDROGEN PHOSPHATE DIHYDRATE
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3420622 |
PROCESS FOR OBTAINING FLUORINE COMPOUNDS FROM DIGESTION SOLUTIONS OF CRUDE PHOSPHATES WITH NITRIC ACID OR HYDROCHLORIC ACID
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3393976 |
Preparation of magnesium hydroxide by treating dolomite with magnesium nitrate solution
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3388966 |
Ammonium phosphate preparation
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3382035 |
Process for production of phosphoric acid
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3346332 |
Liquid system-dehydration of magnesium chloride using ammonia
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3341290 |
Preparation of high purity magnesium oxide from magnesium salt solutions
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3341282 |
Dehydration magnesium chloride utilizing alcohol solution and ammonia
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3338667 |
Recovery of silica, iron oxide and magnesium carbonate from the treatment of serpentine with ammonium bisulfate
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3312607 |
Method of producing solid solutions of the carnallite type
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3218123 |
Recovery of strontium values from sulfate-containing waste solutions
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3170762 |
Manufacture of magnesium hydroxide
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3161466 |
Production and purification of phosphatic materials
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3076691 |
Process of treating phosphate rock
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3065052 |
Purification of strontium nitrate
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3010788 |
Method of separating strontium from other fission products
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3005685 |
Process for desilicifying fluorspar and the like minerals
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2977186 |
Separation of potassium and/or magnesium ions from double salts containing potassium and magnesium
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2952641 |
Strontium precipitation
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2921835 |
Method of processing magnesium bearing brines
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2912306 |
Method of producing magnesia and calcium nitrate from dolomite
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2852340 |
Method of producing ammonium nitrate and magnesium hydroxide
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2813777 |
Process for the crystallization of nitrate from a nitric acid solution of crude phosphate
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2801155 |
Method of producing magnesium hydroxide from dolomite by means of nitric acid
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2785048 |
Process for the production of magnesium hydroxide from a liquor containing magnesiumsulfate and ammonium sulfate
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3755545 |
Title is not available
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