Use of Nonionic Surfactants in Extractive Metallurgy by Electrolysis
1 Assignment
0 Petitions
Accused Products
Abstract
A process for the electrolytic treatment of metal-containing solutions, wherein at least one nonionic surfactant is used in the electrolyte solution, the surfactant reducing the surface tension of the electrolyte solution at a surfactant concentration of 0.2% by weight and a temperature of 24° C. in an aqueous solution with 190 g/l of sulfuric acid and 157 g/l of copper sulfate, which is diluted with water in a ratio of 1:10, by from 20 to 60%, is useful for working up ores or the purification of metals, like copper, chromium, nickel, zinc, gold and silver.
24 Citations
45 Claims
-
1-24. -24. (canceled)
-
25. :
- A process for the electrolytic treatment of metal-containing solutions for separating substances, working up ores and/or purifying metals, wherein at least one nonionic surfactant is used in the electrolyte solution, said surfactant reducing the surface tension of the electrolyte solution at a surfactant concentration of 0.2% by weight and a temperature of 24°
C. in an aqueous solution with 190 g/l of sulfuric acid and 157 g/l of copper sulfate, which is diluted with water in a ratio of 1;
10, by from 20 to 60%, wherein said nonionic surfactant is selected from the group consisting of alkoxylated C4- to C22-alcohols, alkylpolyglucosides, N-alkylpolyglucosides, N-alkylglucamides, fatty acid alkoxylates, fatty acid polyglycol esters, fatty acid amine alkoxylates, optionally endcapped fatty acid amide alkoxylates, fatty acid alkanolamide alkoxylates, N-alkoxypolyhydroxy-fatty acid amides, N-aryloxypolyhydroxy-fatty acid amides, polyisobutene/maleic anhydride derivatives, fatty acid glycerides, sorbitan esters, polyhydroxy-fatty acid derivatives, polyalkoxy fatty acid derivatives and bisglycerides. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 45)
- A process for the electrolytic treatment of metal-containing solutions for separating substances, working up ores and/or purifying metals, wherein at least one nonionic surfactant is used in the electrolyte solution, said surfactant reducing the surface tension of the electrolyte solution at a surfactant concentration of 0.2% by weight and a temperature of 24°
-
34. :
- A method of using nonionic surfactants in electrolytic treatments of metal-containing solutions for separating substances, working up ores and/or purifying metals, wherein said surfactant reduces the surface tension of the electrolyte solution at a surfactant concentration of 0.2% by weight and a temperature of 24°
C. in an aqueous solution with 190 g/l of sulfuric acid and 157 g/l of copper sulfate, which is diluted with water in a ratio of 1;
10, by a value of from 20 to 60%, wherein said nonionic surfactant is selected from the group consisting of alkoxylated C4- to C22-alcohols, alkylpolyglucosides, N-alkylpolyglucosides, N-alkylglucamides, fatty acid alkoxylates, fatty acid polyglycol esters, fatty acid amine alkoxylates, fatty acid amide alkoxylates, fatty acid alkanolamide alkoxylates, N-alkoxypolyhydroxy-fatty acid amides, N-aryloxypolyhydroxy-fatty acid amides, polyisobutene alkoxylates, polyisobutene/maleic anhydride derivatives, fatty acid glycerides, sorbitan esters, polyhydroxy-fatty acid derivatives, polyalkoxy-fatty acid derivatives and bisglycerides. - View Dependent Claims (35, 36)
- A method of using nonionic surfactants in electrolytic treatments of metal-containing solutions for separating substances, working up ores and/or purifying metals, wherein said surfactant reduces the surface tension of the electrolyte solution at a surfactant concentration of 0.2% by weight and a temperature of 24°
-
37. :
- A process for the electrolytic treatment of metal-containing solutions for separating substances, working up ores and/or purifying metals, wherein at least one nonionic surfactant is used in the electrolyte solution, said surfactant being selected from the group consisting of alkoxylated C4- to C22-alcohols, alkylpolyglucosides, N-alkyl-polyglucosides, N-alkylglucamides, fatty acid alkoxylates, fatty acid polyglycol esters, fatty acid amine alkoxylates, fatty acid amide alkoxylates, fatty acid alkanolamide alkoxylates, N-alkoxypolyhydroxy-fatty acid amides, N-aryloxypolyhydroxy-fatty acid amides, polyisobutene alkoxylates, polyisobutene/maleic acid anhydride derivatives, fatty acid glycerides, sorbitan esters, polyhydroxy-fatty acid derivatives, polyalkoxy-fatty acid derivatives and bisglycerides.
- View Dependent Claims (38, 39, 40)
-
41. :
- A method of using nonionic surfactants in electrolytic treatments of metal-containing solutions, wherein said nonionic surfactant is selected from the group consisting of alkoxylated C4- to C22-alcohols, alkylpolygluco sides, N-alkylpolyglucosides, N-alkylglucamides, fatty acid alkoxylates, fatty acid polyglycol esters, fatty acid amine alkoxylates, fatty acid amide alkoxylates, fatty acid alkanolamide alkoxylates, N-alkoxypolyhydroxy-fatty acid amides, N-aryloxypolyhydroxy-fatty acid amides, polyisobutene alkoxylates, polyisobutene/maleic anhydride derivatives, fatty acid glycerides, sorbitan esters, polyhydroxy-fatty acid derivatives, polyalkoxy-fatty acid derivatives and bisglycerides.
- View Dependent Claims (42, 43, 44)
Specification