Patent ID: 6420581
Filing Date: 2002-07-16
Classification: C07F

Abstract:
A process for the manufacture of zinc hexasulfide amine complexes comprising reacting zinc, sulfur and a molar excess of amine at an elevated temperature to obtain a reaction mixture comprising zinc hexasulfide amine complexes and excess amine, adding a first solvent to the reactants or to the reaction mixture in which the zinc hexasulfide amine complexes are largely not soluble in an amount sufficient to obtain a slurry of said reaction mixture in said first solvent suitable for a subsequent separation process in which zinc hexasulfide amine complexes are to be recovered, most of the excess amine being separated from solid zinc hexasulfide amine complexes in the reaction mixture prior to addition of said first solvent by a technique such as decantation, filtering and/or siphoning and recovering zinc hexasulfide amine complexes product as a solid in said subsequent process.