Improved manufacture of hydrofluoric acid from natural fluorides
DE329960C
Process for separating the potassium perchlorate from salt mixtures containing such
DE326385C
Process for creating air-diluted spaces using coal
DE346224C
Process for the production of a substance suitable for explosives and propellants from ammonium nitrate and carbonaceous substances
DE334547C
Process for the production of a substance suitable for explosives and propellants from ammonium nitrate and the nitrates, oxalates and similar salts of ammonia and the amine bases
DE334546C
Process for the production of propellants from ammonium nitrate and carbonaceous substances
DE325314C
Calciner for the production of sulphate
DE342174C
Sealing device for centrifugal pumps for pumping acids and other caustic liquids
