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DE581558C
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Process for producing a nitrogen-rich humus fertilizer
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DE561316C
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Process for the production of a mass suitable for binding ammonia and preserving farm manure
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DE510925C
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Processing of calcium cyanamide into a stable, non-dusting, non-corrosive fertilizer
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DE508257C
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Carbonic acid fertilizer
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DE514253C
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Production of grained calcium cyanamide
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DE422715C
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Process for the production of porous stones or stones containing metal oxides or metals
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DE422235C
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Process for the production of electrode carbon
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DE421268C
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Extraction of carbides
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DE421267C
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Production of hydrogen sulfide
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DE417448C
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Desulphurizing agent for iron
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DE368533C
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Process for the production of ammonium sulphate and ammonium chloride
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DE368532C
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Process for obtaining ammonia from gases
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DE422739C
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Process for the production of paints, stains and varnishes from soft-earthed brown coal
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