Degussa Aktiengesellschaft

Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Degussa Gmbh

Klaus Stutzel

Helmut Knorre

Gerhard Pohl

Marcel Vingerhoets

Edwin Van Raemdonck

Joachim Fischer

Karl Ludwig

Karl L Weber

The trisodium salt of 2,4,6-trimercapto-s-triazine nonahydrate (TMT-Na.sub.3 9H.sub.2 O) is prepared by reacting cyanuric chloride with NaHS and NaOH or with a mixture of NaHS and Na.sub.2 S and NaOH in an alkaline, aqueous medium.

Method of preparing trisodium 2,4,6-mercapto-s-triazine nonahydrate

The trisodium salt of 2,4,6-trimercapto-s-triazine non-ahydrate (TMT-Na.sub.3 9H.sub.2 O) is prepared by reacting cyanuric chloride with NaHS and NaOH or with amixture of NaHS and Na.sub.2 S and NaOH in an alkaline, aqueous medium.

Trisodium salt of 2,4,6-trisodium mercapto-s-triazine monohydrate and

There is provided a continuous process for the lowering of the content of toxic materials in waste waters which also contain other oxidizable materials by quickly and continuously ascertaining the requirement of hydrogen peroxide, namely by potentiometric determination of the oxidizing agent requirement in a branched-off side-stream using a strong oxidizing agent, such as peroxymonosulfate, peroxydisulfate, permanganate, hypochlorite or ozone, which acts more quickly than hydrogen peroxide under comparable conditions.

Process for the treatment of continuous waste water streams having

Copper (Cu.sup.++)-ions are separated from an effluent containing complexing agents which are ethylenediamine tetraacetic acid and/or diethylenetriamine pentaacetic acid or their anionic salts, by using an HS-containing triazine compound and Fe.sup.+++ -ions in a quantity at least equal to the amount of complexing agent.

Process for the separation of Cu.sup.++ -ions from sewage, waste water

Cadmium (Cd.sup.++) ions are separated from an effluent containing complexing agent such as nitrilotriacetic acid, ethylenediamine tetraacetic acid and/or diethylenetriamine pentaacetic acid, or their anionic salts by using an HS-containing triazine compound and Fe.sup.+++ ions in a quantity at least equal to the amount of complexing agent.

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Frankfurt-am-Main, Germany

Klaus Stutzel