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Horace Woodward Crowther
Frederick Peacock Leach
William Thomas Gidden
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Publication of GB190720509ApublicationCriticalpatent/GB190720509A/en
20,509. Crowther, H. W., Leach, F. P., and Gidden, W. T. Sept. 14. Selenium ; sulphur.-In a process for the purifification of sulphuric acid, in which sulphur and selenium are removed as chlorides by blowing air &c. through the acid, sulphur and selenium are recovered as such by passing the gases into strong hydrochloric acid.
GB190720509D1907-09-141907-09-14Improvements in the Purification of Sulphuric Acid from Arsenic and Selenium.
ExpiredGB190720509A
(en)
Process for the roasting and agglomeration of pyrites, pyrite residues, using the sulphurous gases leaving the furnace for the manufacture of sulfuric acid and its derivatives, as well as for roasting, enrichment and agglomeration powdered ores, carbonate ores and metalliferous residues