| abstract |
FIELD: metallurgy. n SUBSTANCE: method consists in use for recovery of extragent of solutions of bicarbonates of univalent strong bases, and namely sodium bicarbonate, tetraethylamine or guanidine, or solutions of carbonates of univalent weak bases or mixture of carbonates and bicarbonates of univalent weak bases, such as hydrazine or methylamine, which are resistant to heating. n EFFECT: invention allows increasing the number of extragent operating cycles. n 14 ex, 2 tbl |