A New Process for the Removal of Iron Oxide from Silica Sands

JSGT 1935 V19 T118-T124

Mention is made of the origin of sands and the impurities likely to affect their suitability for the manufacture of colourless glass with special reference to British sand deposits. Several chemical methods are referred to which have been tried in the past for treating sands to reduce their iron oxide content sufficiently to render possible their use for the manufacture of good quality colourless glass. A new process is outlined in which the sand to be treated is agitated for a short time at a temperature of 26° to 65°, with a solution of acid oxalate, together with small quantities of ferrous sulphate.

F. W. Adams