Method of removing sodium polysulfide from used sodium/sulfur ba

Details Method of removing sodium polysulfide from used sodium/sulfur ba Method of removing sodium polysulfide from used sodium/sulfur ba

1990-12-14

1991-10-08

Straub, Gary P.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Carbon containing

423189, 423205, 429 49, C01B 21093, C01C 320, C01D 132, C22B 2610

Patent

active

050552830

ABSTRACT:
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.

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