| 摘要 |
<p>342,609. Extracting sodium and potassium. CONTE, J. YLLA-, 49, Ronda San Antonio, Barcelona, Spain. April 25, 1930, No. 12818. Convention date, April 27, 1929. [Class 82 (i).] In a process for extracting potassium and sodium the respective carbonate or hydrate or a mixture of both is reduced by carbon in a chamber in which a partial vacuum is maintained. An installation for carrying out the process comprises a reaction chamber 1 heated by a furnace 2 and charged by a worm 4 from a hopper 3 filled with a mixture of carbon and the material to be reduced. A small quantity of lime or calcium carbonate may be included in the mixture. A worm 5 advances the charge slowly through the chamber 1. The vapours of sodium and potassium mixed with carbon monoxide with or without hydrogen issue by a pipe 8 and the residues fall through a pipe 6. A cooler 9 maintained somewhat above 100‹ C. condenses the sodium or potassium without solidifying the metal. A second cooler 11 ending in a receiver 16 reduces the volume of the gases and facilitates the work of the vacuum pump 13. The gases drawn by the pump may be used as fuel and the waste gases passing to the chimney from the furnace may heat the air required for combustion or dry the charge prior to the reduction.</p> |
