초록 ▼

A method of preparing a copper complex for use in eliminating the growth of marine plant life such as algae. The copper complex is provided by initially reacting an insoluble copper compound with an aqueous solution of an acid to dissociate the copper ions, and thereafter chelating the released copp

A method of preparing a copper complex for use in eliminating the growth of marine plant life such as algae. The copper complex is provided by initially reacting an insoluble copper compound with an aqueous solution of an acid to dissociate the copper ions, and thereafter chelating the released copper ions to form a copper complex. The resulting complex has improved stability to both heat and light and contains an increased amount of copper compared to copper complexes formed by prior methods, thereby making the complex more effective as an algaecide.

대표청구항 ▼

An algaecide composition having improved stability, comprising an aqueous solution containing an algaecidal effective amount of a copper complex produced by reacting a water-insoluble copper compound selected from the group consisting of (a) copper carbonate, (b) copper oxide, (c) copper hydroxide,

An algaecide composition having improved stability, comprising an aqueous solution containing an algaecidal effective amount of a copper complex produced by reacting a water-insoluble copper compound selected from the group consisting of (a) copper carbonate, (b) copper oxide, (c) copper hydroxide, (d) copper bicarbonate, (e) copper benzoate, (f) copper thiocyanate and (g) naturally occurring copper minerals containing at least one of said (a)-(f) inclusive with an aqueous solution of an acid in sufficient amount to dissociate the copper ions from said compound, said acid selected from the group consisting of an inorganic acid and an organic acid having from 1 to 22 carbon atoms in the molecule, and thereafter chelating the copper ions with a chelating agent selected from the group consisting of (a) an alkanolamine having at least one alkanol group containing from 1 to 10 carbon atoms in the molecule, (b) polyethylene glycols having an average molecular weight in the range of 200 to 4000, (c) tertiary amines and (d) carboxylic acids having 1 to 22 carbon atoms in the molecule and (e) water soluble salts of (d), to provide the complex.