Patent · US Expired

Disodium salt of trimercapto-s-triazine hexahydrate, and method of its preparation

US5075444A · kind A · utility

3Cited by

3References

2Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Klaus Hentschel · Rodenbach, DE
Marc Samson · Lokeren, BE
Marcel Vingerhoets · Brecht, BE
Karl-Ludwig Weber · Dieburg, DE

Key dates

Filing date	Aug 17, 1990
Grant date	Dec 24, 1991
Priority date	—
Expiry date	Aug 17, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D251/38
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The disodium salt of trimercapto-s-triazine hexahydrate (TMT-Na.sub.2.6H.sub.2 O) which has a considerably higher water solubility than previously known TMT sodium salts. It is used for separating heavy metals from aqueous phase, especially from waste water. TMT-Na.sub.2.6H.sub.2 O is prepared by reacting TMT-Na.sub.3 .9H.sub.2 O, available from cyanuric chloride, with trimercapto-s-triazine (TMT-Ha.sub.3) in a molar ratio of 2-2.1 to 1 in aqueous medium with subsequent crystallization of the TMT-Na.sub.2 .6H.sub.2 O.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.