Aqueous solutions of sodium salts of trimercapto-s-triazine, the

Details Aqueous solutions of sodium salts of trimercapto-s-triazine, the Aqueous solutions of sodium salts of trimercapto-s-triazine, the

1992-08-25

1993-11-02

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544180, 544216, C07D25138

Patent

active

052585158

ABSTRACT:
The invention relates to aqueous solutions of sodium salts of trimercapto-s-triazine whose molar saturation concentration at 0.degree. C. to 40.degree. C. is above the saturation concentration of trimercapto-s-triazine trisodium salt (TMT-Na.sub.3). More than two but less than three hydrogen atoms of the trimercapto-s-triazine are replaced by sodium ions. The solutions preferably contain trimercapto-s-triazine disodium salt (TMT-Na.sub.2) in addition to a little TMT-Na.sub.3. Surprisingly, the water solubility of TMT-Na.sub.2 is greater than that of TMT-Na.sub.3. The solutions represent a suitable supply form for the active substance trimercapto-s-triazine (TMT-H.sub.3) used in the separation of heavy metals The preparation takes place by means of reacting TMT-Na.sub.3 with TMT-H.sub.3 in a molar ratio of 1:greater than 0-less than 0.5, especially 1:0.1 to 1:<0.5 in aqueous solution.

REFERENCES:
patent: 3778368 (1973-12-01), Nakamura et al.

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