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DE394498C
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Production of sodium nitrite
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Electrode for high-tension arc furnaces
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Process for concentrating aqueous nitric acid by means of sulphuric acid
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|
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Process for obtaining pure nitric acid from nitrous gases
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Process for producing nitric acid by means of the electric arc
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Process and device for stabilizing electric arcs
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Process for obtaining nitric acid by means of the electric arc in a closed cycle
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DE376286C
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Process for the production of nitric acid by means of electric flame arc
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GB153574A
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Process for effecting the change of calcium cyanamide into urea
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Process of preparing highly-concentrated nitric acid.
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CA240099A
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Electrode
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CA228883A
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Production of nitric acid by electric arcs
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