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GB17624/25A
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C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B17/00—Sulfur; Compounds thereof
C01B17/69—Sulfur trioxide; Sulfuric acid
C01B17/74—Preparation
C01B17/745—Preparation from sulfates
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Chemical & Material Sciences
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Organic Chemistry
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Inorganic Chemistry
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Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals
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Abstract
Sulphur trioxide is obtained by heating sulphates such as iron or aluminium sulphates or alum in vacuo. The sulphur trioxide may be converted into sulphuric acid and employed to treat raw materials to produce more sulphates. The heating may be effected in iron retorts or in mechanical shelf furnaces. Ferric sulphate may be decomposed at 630 DEG C. in a vacuum of 50 mm.ALSO:Metallic oxides and sulphur trioxide are obtained by heating sulphates such as iron or aluminium sulphates or alum in vacuo. The sulphur trioxide may be converted into sulphuric acid and employed to treat raw materials to produce more sulphates. The heating may be effected in iron retorts or in mechanical shelf furnaces. Ferric sulphate may be decomposed at 630 DEG C. in a vacuum of 50 m.m.
GB17624/25A1924-07-161925-07-09Improved method of decomposing metal sulphates by heating
ExpiredGB237243A
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