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US 2026/0225092 A1Published application
Method for the Separation of Zinc and Iron from Electric Arc Furnace Baghouse Dust
AssigneeAmerican Renewable Metals LLC
InventorsWilliam Rusty Sutterlin, Mark Tegen
Life of this patent
Estimating the term…
Abstract
Provided are new and improved novel processes and continuous ion exchange/continuous ion chromatography (CIX/CIC) systems for the separation of iron and zinc from electric arc furnace baghouse dust.
Claims20
A process for separating fraction comprising iron and zinc into individual high purity fractions with a continuous ion exchange/continuous ion chromatography (CIX/CIC) system, the process comprising:
- (a) providing a starting material comprising at least a mixture of a form of iron and a form of zinc;
- (b) optionally adding an oxidant to the starting material to convert Fe (II) to Fe (III);
- (c) mixing the starting material in an acid or acid chloride solution, or adding the starting material to an acid or acid chloride solution, wherein the acid or acid chloride solution has greater than about 0.25 molarity chloride concentration, or between about 0.01 molarity and 10 molarity chloride concentration, preferably 8 molarity chloride;
- (d) adding or loading the starting material-comprising acid or acid chloride solution of step (c) into or onto an anion exchange resin column whereby any ferric tetrachloride anion (optionally a FeCl4− complex binds to the anion exchange resin) in the starting material-comprising acid chloride solution is retained on the anion exchange resin, and generating a ferric tetrachloride (FeCl4− complex) anion-free, cationic metal-comprising eluate;
- (e) adding or loading the starting material-comprising acid or acid chloride solution of step (c) into or onto an anion exchange resin column whereby any Zinc tetrachloride anion (optionally a ZnCl429− complex binds to the anion exchange resin) in the starting material-comprising acid chloride solution is retained on the anion exchange resin, and generating a Zinc tetrachloride (ZnCl429− complex) anion-free, cationic metal-comprising eluate;
- (f) first passing an eluting solution having a low acid concentration of about 0.1 to 2 molarity, preferably 0.25 to 1 molarity over the anion exchange resin to elute the ferric chloride;
- and
- (g) second passing an eluting solution of water over the anion exchange resin to elute the zinc chloride.
5 more elements
A process for separating fraction comprising iron and zinc into individual high purity fractions with a continuous ion exchange/continuous ion chromatography (CIX/CIC) system, the process comprising:
- (a) providing a starting material comprising at least a mixture of a form of iron and a form of zinc;
- (b) optionally adding an oxidant to the starting material to convert Fe (II) to Fe (III);
- (c) mixing the starting material in an acid or acid chloride solution, or adding the starting material to an acid or acid chloride solution, wherein the acid or acid chloride solution has greater than about 0.25 molarity chloride concentration, or between about 0.01 molarity and 10 molarity chloride concentration, preferably 8 molarity chloride;
- (d) adding or loading the starting material-comprising acid or acid chloride solution of step (b) into or onto an anion exchange resin column, whereby any ferric tetrachloride anion (optionally a FeCl4− complex binds to the anion exchange resin) in the starting material-comprising acid chloride solution is retained on the anion exchange resin, and generating a ferric tetrachloride (FeCl4− complex) anion-free, cationic metal-comprising eluate;
- and
- (e) adding or loading the starting material-comprising acid or acid chloride solution of step (b) into or onto an anion exchange resin column, whereby any Zinc tetrachloride anion (optionally a ZnCl429− complex binds to the anion exchange resin) in the starting material-comprising acid chloride solution is retained on the anion exchange resin, and generating a Zinc tetrachloride (ZnCl429− complex) anion-free, cationic metal-comprising eluate;
- (f) first passing an eluting solution having a low acid concentration of about 0.1 to 2 molarity, preferably 0.25 to 1 molarity over the anion exchange resin to elute the ferric chloride;
- and
- (g) second passing an eluting solution of water and carbon dioxide under pressure forming carbonic acid over the anion exchange resin to elute the zinc carbonate, zinc chloride, or free chloride.
6 more elements
A process for separating fraction comprising iron and zinc into individual high purity fractions with a continuous ion exchange/continuous ion chromatography (CIX/CIC) system, the process comprising:
- (a) providing a starting material comprising at least a mixture of a form of iron and a form of zinc;
- (b) optionally adding an oxidant to the starting material to convert Fe (II) to Fe (III);
- (c) mixing the starting material in an acid or acid chloride solution, or adding the starting material to an acid or acid chloride solution, wherein the acid or acid chloride solution has greater than about 0.25 molarity chloride concentration, or between about 0.01 molarity and 10 molarity chloride concentration, preferably 8 molarity chloride;
- (d) adding or loading the starting material-comprising acid or acid chloride solution of step (c) into or onto an anion exchange resin column, whereby any ferric tetrachloride anion (optionally a FeCl4− complex binds to the anion exchange resin) in the starting material-comprising acid chloride solution is retained on the anion exchange resin, and generating a ferric tetrachloride (FeCl4− complex) anion-free, cationic metal-comprising eluate;
- and
- (e) adding or loading the starting material-comprising acid or acid chloride solution of step (c) into or onto an anion exchange resin column, whereby any Zinc tetrachloride anion (optionally a ZnCl429− complex binds to the anion exchange resin) in the starting material-comprising acid chloride solution is retained on the anion exchange resin, and generating a Zinc tetrachloride (ZnCl429− complex) anion-free, cationic metal-comprising eluate;
- (f) first passing an eluting solution having a low acid concentration of about 0.1 to 2 molarity, preferably 0.25 to 1 molarity over the anion exchange resin to elute the ferric chloride;
- (g) second passing an eluting solution of water over the anion exchange resin to elute the zinc chloride;
- (h) loading the essentially pure zinc chloride solution onto a cation exchange resin, and passing water over the resin the remove the chloride solution;
- (i) mixing carbon dioxide with the water to form carbonic acid and contacting the carbonic acid solution with the zinc bound cation exchange system forming zinc bicarbonate and or zinc carbonate;
- and
- (j) removing the zinc carbonate by precipitation or filtration from the eluate.
9 more elements
Dependencies are inferred from the claim text.