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Expired
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GB18179/20A
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Individual
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Individual
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Publication of GB145789ApublicationCriticalpatent/GB145789A/en
Crude tin is refined by treating with dry chlorine which may be obtained by vaporizing liquid chlorine, filtering the liquid product, treating with water to decompose the chlorides of antimony, arsenic and sulphur, filtering again, and recovering tin from the pure solution of stannic chloride, for instance by reduction to stannous chloride and electrolysis. To separate the antimony, the process is modified by heating the reaction vessel to 115-120 DEG when the antimony pentachloride is decomposed into chlorine and solid trichloride which is therefore removed in the first filtration. In a similar manner antimony is separated from metals such as lead, and is obtained as peutachloride alone when tin does not occur among the impurities.
GB18179/20A1919-04-051920-07-02A new or improved process for refining tin and antimony
ExpiredGB145789A
(en)