NO128910B

1403253 Treating waste water to remove metal ions SANKYO KASEI CO Ltd 14 Aug 1972 [18 Aug 1971] 37756/72 Heading C1C Waste water containing metal ions having a standard electrode potential of at least -0À44 V (at 25 C.) is treated to remove said ions by the addition thereto of at least one mercapto...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAMURA Y,JA, YAMADA I,JA, UMEHARA A,JA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Zusammenfassung:	1403253 Treating waste water to remove metal ions SANKYO KASEI CO Ltd 14 Aug 1972 [18 Aug 1971] 37756/72 Heading C1C Waste water containing metal ions having a standard electrode potential of at least -0À44 V (at 25 C.) is treated to remove said ions by the addition thereto of at least one mercaptos-triazine and water-soluble salts thereof. The triazine has the formula wherein R is -H, -NH 4 , C 1-8 alkyl or alkoxy, phenyl, cyclohexyl, morpholino, phenoxy, -NR1 2 or SR11, R1 being -H, C 1-8 alkyl, phenyl, cyclohexyl, naphthyl or benzyl, R11 being C 1-8 alkyl, phenyl, cyclohexyl, naphthyl or benzyl, m is 1 to 3, n 0 to 2 and when n is 2, each R may be the same or different. Alkali metal, alkaline earth metal and ammonium salts of mercapto-s-triazine, may be used. Exemplified treatments are directed to waste fixing solutions, waste electroplating solutions, and solutions containing Cu++, Cd++, Pb++, Hg++ and Ag++ ions.