Improvements in or relating to the Electrolytic Manufacture of Chlorates Perchlorates, Bromates, Iodates and the like

摘要

17,320. Corbin, P. E. C. March 25, [date applied for under Sec. 103 of Patents &c. Act, A.D. 1883]. Bromates; chlorates; iodates; perchlorates.- These or like compounds are produced by electrolysis of chloride, chlorate, or like solutions, containing a small quantity of chromic 'acid, which is kept in the state of bichromate by adding small quantities of a dilute acid, preferably hydrochloric, hydrobromic, or hydriodic acid, to the solution, so that it is never alkaline. The chromic acid remains unaltered, chlorine is not evolved, and the process is efficient as regards the current required. A warm solution of sodium or potassium chloride may be electrolysed, with additions of the chloride, so far that chlorate crystallizes out from the solution when this is cooled, without concentration ; the residual solution is returned to the electrolytic apparatus. Cathodes of carbon, iron, copper, or brass may be used, and the apparatus may be made of any desired material.