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DE675431C
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Production of low-impurity carbon, especially carbon black and hydrogen
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DE665035C
|
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Process to increase the shelf life of calcium cyanamide grains
|
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DE698581C
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Process for the preparation of a citric acid soluble phosphate fertilizer
|
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DE689191C
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Process for the production of aminoguanidine bicarbonate
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DE651114C
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Process to improve the shelf life of calcium cyanamide grains
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DE652958C
|
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Process for the production of high percentage nitric acid
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DE677208C
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Process for the production of dicalcium phosphate
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DE639672C
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Process for the production of calcium cyanamide
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DE634444C
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Process for the production of durable grains from fertilizers containing free lime
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DE606369C
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Dust repellent
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DE670616C
|
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Process for the separation of ammonia and carbon dioxide
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DE555547C
|
|
Process for operating electric arc furnaces
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DE600903C
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Process for preparing carbide for azotation
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DE581868C
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Device for filling carbide
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DE577919C
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|
Manufacture of argon
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DE588409C
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Process for the azotization of large amounts of carbide
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DE582042C
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Process for the azotizing of carbides
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DE583535C
|
|
Process for the rapid azotization of carbide
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DE514173C
|
|
Production of phosphoric acid and hydrogen
|
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DE572325C
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Process for filling the inserts used to azotize the calcium carbide
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