Methods and systems for reducing impurity metal from a refinery electrolyte solution
AssigneeBASF SE
InventorsJack Bender, Nathan C. Emmerich
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Abstract
Disclosed are methods for the reduction of impurity metals from a refinery electrolyte solution. Certain methods comprise contacting a refinery electrolyte solution comprising an impurity metal with a phosphate ester having a structure represented by: wherein R1 comprises a linear, branched or cyclic alkyl or aryl group, and wherein the impurity metal is selected from the group consisting of iron, antimony, arsenic, bismuth, tin and combinations thereof.
Claims20
A method of reducing impurity metal from a refinery electrolyte solution, the method comprising contacting a refinery electrolyte solution comprising sulfuric acid and an impurity metal with a phosphate ester having a structure represented by:
- wherein R1 comprises a linear, a C6 -C9 branched or a cyclic alkyl or aryl group,
- wherein the phosphate ester comprises iso-octyl phosphoric acid or a C12 alkyl phenylphosphoric acid, and
- wherein the impurity metal is selected from the group consisting of iron, antimony, arsenic, bismuth, tin and combinations thereof.
A method of reducing impurity metal from a refinery electrolyte solution, the method comprising:
- a. bleeding a stream of electrolyte solution with impurities from a refinery process, the electrolyte solution with impurities comprising sulfuric acid and an impurity metal selected from the group consisting of iron, antimony, arsenic, bismuth, tin and combinations thereof;
- and
- b. mixing the electrolyte solution with impurities with a stripped organic solution to provide a loaded organic solution containing at least a portion of the impurities and electrolyte solution with reduced impurities,
- wherein the stripped organic solution comprises a phosphate ester having a structure represented by:
- wherein R1 comprises a linear, a C6 -C9 branched or a cyclic alkyl or aryl group, and
- wherein the phosphate ester comprises iso-octyl phosphoric acid or a C12 alkyl phenylphosphoric acid.
A method of reducing impurity metal from a refinery electrolyte solution, the method comprising:
- a. bleeding a stream of electrolyte solution with impurities from a copper refinery process, the electrolyte solution with impurities comprising sulfuric acid and an impurity metal selected from the group consisting of iron, antimony, arsenic, bismuth, tin and combinations thereof;
- b. mixing in a mixing tank the electrolyte solution with impurities with a stripped organic solution to provide an emulsion comprising a loaded organic solution containing at least a portion of the impurities and electrolyte solution with reduced impurities,
- wherein the stripped organic solution comprises a phosphate ester having a structure represented by:
- wherein R1 comprises a linear, C6 -C9 branched or cyclic alkyl or aryl group, wherein the phosphate ester comprises iso-octyl phosphoric acid or a C12 alkyl phenylphosphoric acid;
- c. separating the loaded organic solution and electrolyte solution with reduced impurities in a settler;
- d. returning the electrolyte with reduced impurities to the copper refinery process;
- e. mixing in a mixing tank the loaded organic solution and a strip solution to provide an emulsion comprising a strip solution containing the impurity metal and stripped organic;
- and
- f. separating the strip solution containing the impurity metal and stripped organic.
Dependencies are inferred from the claim text.