A process and apparatus for elemental sulphur recovery from acid gases. By this process, acid gas, a by-product of sour natural gas from crude oil processing plants, is mixed with air and introduced to a partial oxidization furnace, and hot products of oxidization are then passed to a catalyst regenerator where elemental sulphur is vaporized. The sulphur is then recovered in a sulphur condenser, and regenerated catalyst is recycled to a catalyst contactor in a continuous flow arrangement. Also disclosed is a sulphur recovery apparatus comprising a catalyst contactor, catalyst regenerator, and sulphur condenser which operates in continuous fashion.
A method for removing sodium polysulfide from used sodium/sulfur batteries provides that the cells are granulated under protective measures, the scrap is treated in a solution of sodium cyanide and the solution obtained is treated with air. The solution then contains sodium thiocyanate and sodium hydroxide, which latter can be reacted by means of CO.sub.2 to Na.sub.2 CO.sub.3, precipitated and separated.
