calcium nitrate decomposition

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It is within the scope of the present invention to inject the calcium nitrate into the decomposition zone in either solid or liquid form. In the practice of the present invention, the calcium nitrate is decomposed in a vertically oriented decomposition zone containing a bed of inert particulate inorganic material maintained in the fluidized state by the passage of an inert gas upwardly through the bed at a spacial velocity suflicient to maintain the bed in a fluidized state. solids may be returned to reactor 1 through line 22. The larger sized par ticles of lime formed by means of the fluidized operation of the present invention, on the other hand, permits the obtaining of a product gas stream essentially free of calcium oxide fines. The bed of solids is maintained in a fluidized state by passing an inert gas upwardly through the decomposition zone at a spacial velocity sufiicient to maintain the bed in a fluidized state. Any other conventional type contacting chamber in which the calcium nitrate may be exposed to decomposition temperature in the presence of a nitrogen oxide-containing atmosphere may be employed in the practice of the present invention. By purging the solids withdrawal stream with oxygen from line 23, any nitrogen values entrapped or otherwise carried over with the solids may be recovered in the form of nitrogen oxides. Water may be added to the autoclave through line 13, and nitric acid produced in the autoclave may be withdrawn through line "14. Nitric acid is produced in autoclave 10 in accordance with known procedures to produce acid having a concentration of 98% or higher. As indicated above, one embodiment of the present invention calls for the heating of a portion of the lime withdrawn from the decomposition zone followed by recycling to the bed in the reactor. 1971 J. w. MARKEY DECOMPOSITION OF CALCIUM NITRATE 2 Sheets-Sheet 1 Filed April 1 1968 mmw zmozou m l u HOLDV 3 B mozmiwm mojom m o woman zmw xO INVENTOR JOSEPH-W MARKEY a; womna ATTORNEY United States Patent Ofice Int. nitrite and nitrate for fertilizers, involves performing gas liquid sorption and gas solid sorption of nitrogen oxide using sorbent containing hydroxides and/or oxides of alkaline earth metal, Cement production from coal conversion residues, Sulfate reduction process useful in coal gasification, Absorption of sulfur oxides from hot gases, Process for producing cement from a flue gas desulfurization process waste product, Process for gasifying finely grained solid fuels, Granular calcium hypochlorite coated with a low melting inorganic salt by spray graining, Method of forming discrete pieces or pellets from meltable glass-producing mixtures, Process for manufacturing uranium dioxide, Process for preparing granular calcium hypochlorite in a fluidized bed, Method of producing sulfur from sulfur dioxide, Granulation of crystalline by-product ammonium sulfate, Modified pyrohydrolysis process for spent aluminum reduction cell linings, Preparation of soda ash including the leaching of trona with steam, Removal of sulfur oxides from waste gases, Process for making sodium percarbonate granules, Absorption of sulfur oxides from flue gas, Processes and systems for producing silicon tetrafluoride from fluorosilicates in a fluidized bed reactor, Preparation of mixed metal oxides by thermal decomposition of metal salts, Process for converting silicon-and-fluorine-containing waste gases into silicon dioxide and hydrogen fluoride. CALCIUM NITRATE IS DECOMPOSED IN THE PRESENCE OF A BED OF FLUIDIZED SOLIDS. Thus, the product gas stream leaving reactor 1 will comprise essentially nitrogen oxides, i.e. Exact dosages, concentration and application stage are subject to local conditions, use of other fertilizers and can only be given after an objective diagnosis. Our product is the highest concentrated product on the market. The presence of Nitrogen has a positive effect on the uptake of Calcium in the plant. Thanks for your interest in our products, please leave your credentials to receive our latest news. A portion of the by-product lime collects in the bottom of decomposition chamber 106 and is discharged through air lock valve 108 onto screw conveyor 109, which removes it to storage and ultimate use as a byproduct of the acidulation process. The use of recycled product gas as the fluidizing gas and the inclusion of the recited oxygen purge are highly advantageous features of this embodiment of the present invention. (NO), and water. A portion of the gas may be recycled to reactor 1 through line 7. By also minimizing or at least restricting the amount of water in the system, a resulting product gas stream may be obtained that is particularly well suited for theproduction of very concentrated nitric acid. In this manner, the nitrogen values that may be entrapped or otherwise carried over into the solids withdrawal stream may be recovered in the form of nitrogen oxides, thus serving also to eliminate nitrogen from the product gases, while likewise adding the excess oxygen that would in any event, have to be added at some stage in order to produce a very concentrated nitric acid. Wir und unsere Partner nutzen Cookies und ähnliche Technik, um Daten auf Ihrem Gerät zu speichern und/oder darauf zuzugreifen, für folgende Zwecke: um personalisierte Werbung und Inhalte zu zeigen, zur Messung von Anzeigen und Inhalten, um mehr über die Zielgruppe zu erfahren sowie für die Entwicklung von Produkten. A process according to claim 2 in which the recycled gases of step (b) are heated to about about 650 C. prior to passage through the fluidized bed decomposition zone. Lime produced in the fluidized bed decomposition of such calcium nitrate, however, had a density of about 68 to 70 pounds per cubic foot. After passage through gas-solids separator 5, and withdrawal of the portion of the product gas employed for fluidization of bed 2, the product gas stream may be passed through heat exchanger 8 and condensing unit 9 in which, under moderate pressure, the stream may be refrigerated so as to remove essentially all of the nitrogen oxides as liquid nitrogen tetroxide.

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