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KR-20260065850-A - Composition and method for removing metal from a medium

KR20260065850AKR 20260065850 AKR20260065850 AKR 20260065850AKR-20260065850-A

Abstract

The disclosed composition and method relate to the removal of metals from a medium, such as an aqueous medium. The aqueous medium may be, for example, wastewater, such as wastewater from the microelectronics industry. The formulated composition has been found to be synergistically desirable in that it reduces toxicity and increases coagulation ability in the chemical precipitation of metal contaminants. The composition may include, for example, polymeric DTC and TMT. The target metal may include, for example, heavy metals, such as copper, nickel, and mercury.

Inventors

  • 진 닝

Assignees

  • 에코랍 유에스에이 인코퍼레이티드

Dates

Publication Date
20260511
Application Date
20240828
Priority Date
20230906

Claims (20)

  1. As a composition for treating a medium, trimercapto-s-triazine (TMT); and It comprises a polymer containing a dithiocarbamate (DTC) functional group; The weight average molecular weight of the above polymer is about 500 to about 200,000 g/mol, and The above polymer has about 5 to about 100 mol% of DTC functional groups, and A composition for treating a medium, comprising a molar ratio of TMT to DTC of about 1:1 to about 1:9.
  2. A composition for treating a medium, wherein the polymer has about 30 mol% to about 80 mol% of DTC functional groups in the first paragraph.
  3. A composition for treating a medium, wherein, in claim 1 or 2, the polymer is derived from the reaction of an amine functionalized polymer backbone and CS2 .
  4. A composition for treating a medium, wherein the amine functionalized polymer is selected from the group consisting of polyethyleneimine, copolymer of ethylene dichloride and ammonia, polyamidoamine, polyallylamine, a polymer comprising acrylic acid or a derivative thereof and an alkylamine, a polymer comprising methacrylic acid or a derivative thereof and an alkylamine, and any combination thereof, and the alkylamine is selected from the group consisting of ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetraamine (TETA), tetraethylenephetamine (TEPA), pentaethylenehexamine (PEHA), and any combination thereof.
  5. A composition for treating a medium, wherein, in any one of claims 1 to 4, the TMT further comprises a solvent comprising about 40% to about 95% of the total weight.
  6. A composition for treating a medium, wherein, in any one of claims 1 to 5, the polymer containing a DTC functional group further comprises a solvent comprising about 40% to about 95% of the total weight based on the weight of the polymer.
  7. A composition for treating a medium, comprising a polymer comprising about 2 to 10 weight% of TMT and about 5 to 20 weight% of DTC functional groups, in any one of claims 1 to 6.
  8. A composition for treating a medium, wherein, in any one of claims 1 to 7, the composition further comprises an aqueous solvent.
  9. As a method for removing metal from a medium, A step of adding a polymer containing the above TMT and DTC functional groups to a medium; and It includes a step of separating a metal-containing precipitate from a medium; The weight average molecular weight of the above polymer is about 500 to about 200,000 g/mol, and The above polymer has about 5 to about 100 mol% of the above DTC functional group, and A method for removing metal from a medium, wherein the DTC functional groups of the above TMT and polymer are added in a molar ratio of about 1:1 to about 1:9.
  10. A method for removing metal from a medium, wherein, in claim 9, the polymer has about 30 mol% to about 80 mol% of DTC functional groups.
  11. A method for removing metal from a medium, wherein, in claim 9 or 10, the TMT and polymer are pre-mixed to form a composition, and the composition is added to a medium.
  12. A method for removing metal from a medium, wherein the TMT is added to the medium before, after, and/or together with the polymer in accordance with claim 9 or 10.
  13. A method for removing a metal from a medium, wherein, in any one of claims 1 to 12, the separation is performed by a process selected from the group consisting of sedimentation/decanting, filtration, flotation, and any combination thereof.
  14. A method for removing metal from a medium, wherein, in any one of claims 1 to 13, the TMT further comprises a solvent, and the solvent comprises about 40 to 95% of the total weight.
  15. A method for removing metal from a medium, wherein, in any one of claims 1 to 14, the polymer further comprises a solvent, and the solvent comprises about 40 to 95% of the total weight.
  16. A method for removing metal from a medium according to any one of claims 1 to 15, wherein the composition comprises a polymer comprising about 2 to 10 weight% of TMT and about 5 to 20 weight% of DTC functional groups.
  17. A method for removing metal from a medium, wherein, in any one of claims 1 to 16, the measured supernatant turbidity of the medium after the addition of the TMT and the polymer is less than about 3 nephelometric turbidity units (NTU).
  18. A method for removing metal from a medium, wherein, in any one of claims 1 to 17, the composition is added to the medium at a concentration of about 1 ppm to about 1,000 ppm per 1 ppm of metal present in the medium.
  19. A method for removing a metal from a medium, wherein, in any one of claims 1 to 18, the metal is selected from the group consisting of copper, nickel, zinc, lead, mercury, cadmium, silver, iron, manganese, palladium, platinum, strontium, arsenic, cobalt, gold, and any combination thereof.
  20. A method for removing metal from a medium, wherein, in any one of claims 1 to 19, the medium is an aqueous medium.

Description

Composition and method for removing metal from a medium The disclosure of the present invention generally relates to a composition, a component, and a method for treating a medium. More specifically, the present disclosure relates to a composition and a component for removing a metal, such as copper, from a medium, such as wastewater. Wastewater containing heavy metals originates from processes and uses in various industries, such as electroplating, paints and dyes, petroleum refining, fertilizers, mining and metallurgy, explosives, pesticides, and steel. When discharged into municipal waste systems, heavy metals can be highly harmful to the environment and human health. With copper currently being the third most widely used metal in the world, concerns regarding wastewater pollution are steadily increasing as its industrial applications continue to expand. As a result, many factories implement pollution prevention programs that include a wide range of pollution control methods, as required by strict regulations. Chemical precipitation, one of these methods, is widely used due to its cost-effectiveness and simplicity of operation, and can be effectively applied over a wide temperature range. In the microelectronics industry, traditional treatment methods for wastewater streams containing copper contaminants involve chemical precipitation processes. For example, dithiocarbamate (DTC) is a reagent commonly used in copper removal processes due to its cost-effectiveness. However, DTC is also a fungicide and a broad-spectrum biocide, and if used in excess in wastewater, it can cause toxicological and ecological problems. Therefore, a more environmentally friendly option is needed to reduce toxicological and ecological damage by removing contaminants, particularly copper metal from microelectronics industry process wastewater. The disclosure of the present invention provides a method and a composition for treating a medium. In some embodiments, the present disclosure provides a composition for treating a medium. The composition comprises a polymer comprising trimercapto-s-triazine (TMT) and dithiocarbamate (DTC) functional groups and an amine functional group. The weight average molecular weight of the polymer is about 500 to about 200,000 g/mol, and the polymer has about 5 to about 100 mol% of the DTC functional groups relative to the total DTC and amine functional groups. The composition comprises a molar ratio of TMT to DTC of about 1:1 to about 1:9. In some embodiments, the weight ratio of TMT to polymer is about 1:1 to about 1:8, about 1:1 to about 1:7, about 1:1 to about 1:6, about 1:1 to about 1:5, about 1:1 to about 1:4, about 1:1 to about 1:3, or about 1:1 to about 1:2. In some embodiments, the polymer has about 30 mol% to about 80 mol% of DTC functional groups. In certain embodiments, the polymer is derived from the reaction of an amine functionalized polymer backbone with CS2 . The amine functionalized polymer may be selected from the group consisting of polyethyleneimine, copolymers of ethylene dichloride and ammonia, polyamidoamine, polyallylamine, polymers comprising acrylic acid or its derivatives and alkylamines, polymers comprising methacrylic acid or its derivatives and alkylamines, and any combination thereof, and the alkylamine may be selected from the group consisting of ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetraamine (TETA), tetraethylenepentamine (TEPA), pentaethylenehexamine (PEHA), and any combination thereof. In some embodiments, the TMT further comprises a solvent, which comprises about 40% to about 95% of the total weight. In some embodiments, the polymer containing the DTC functional group further contains a solvent, which comprises about 40% to about 95% of the total weight. In a specific embodiment, the composition comprises a polymer comprising about 2 to 10 weight% of TMT and about 5 to 20 weight% of DTC functional groups. In some embodiments, the composition further includes an aqueous solvent. The disclosure of the present invention also provides a method for removing a metal from a medium. The method comprises the steps of adding a polymer comprising TMT and DTC functional groups to a medium and separating a precipitate comprising a metal from the medium. The weight average molecular weight of the polymer may be about 500 to about 200,000 g/mol, and the polymer may have about 5 to about 100 mol% of DTC functional groups. The TMT and the DTC functional groups of the polymer are added in a molar ratio of about 1:1 to about 1:9. In some embodiments, the polymer has about 30 mol% to about 80 mol% of DTC functional groups. In some embodiments, TMT and a polymer are pre-mixed to form a composition, and the composition is added to a medium. In certain embodiments, TMT is added to the medium before, after, and/or together with the polymer. In some embodiments, separation is performed by a process selected from the group consisting of sedimentation/decanting, fil