Acid regeneration of ion exchange resins for industrial applications
First Claim
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1. A method for treating hard water using an acid regenerated ion exchange resin comprising:
- contacting a hard water source with a water treatment composition placed in front of a dilution systemin a service cycle, wherein the water treatment composition comprises at least one ion exchange resin, wherein the ion exchange resin generates a treated water source by exchanging protons on said resin for dissolved cations including water hardness ions and total dissolved solids in said water source, and wherein said ion exchange resin is regenerated using an acid;
generating the service cycle treated water source comprising softened, acidic and low total dissolved solids (TDS) water having a hardness level of less than about 2 grains per gallon (gpg) and a pH less than about 6, wherein the treated water source may be used for washing and/or rinsing in a variety of cleaning applications; and
regenerating the ion exchange resin upon exhaustion using an acid regenerant.
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Abstract
Methods and systems for acid regeneration of ion exchange resins are disclosed. Acid resins designed for use in a variety of cleaning application using a water source use a treated, softened, acidic water source according to the invention. Various methods of using the softened acidic water generated by acid regenerate-able ion exchange resins are disclosed to beneficially reduce spotting, filming and scale buildup on treated surfaces, reduce and/or eliminate the need for polymers, threshold reagents and/or rinse aids, and using protons generated in the acidic water effluent for triggering events useful in various cleaning applications.
31 Citations
10 Claims
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1. A method for treating hard water using an acid regenerated ion exchange resin comprising:
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contacting a hard water source with a water treatment composition placed in front of a dilution system in a service cycle, wherein the water treatment composition comprises at least one ion exchange resin, wherein the ion exchange resin generates a treated water source by exchanging protons on said resin for dissolved cations including water hardness ions and total dissolved solids in said water source, and wherein said ion exchange resin is regenerated using an acid; generating the service cycle treated water source comprising softened, acidic and low total dissolved solids (TDS) water having a hardness level of less than about 2 grains per gallon (gpg) and a pH less than about 6, wherein the treated water source may be used for washing and/or rinsing in a variety of cleaning applications; and regenerating the ion exchange resin upon exhaustion using an acid regenerant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for treating hard water using an acid regenerated ion exchange resin comprising:
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contacting a hard water source with a water treatment composition placed in front of a dilution system in a service cycle, wherein said dilution system is an aspirator or other pump that feeds into a cleaning system, wherein the water treatment composition comprises at least one ion exchange resin, wherein the ion exchange resin generates a treated water source by exchanging protons on said resin for dissolved cations including water hardness ions and total dissolved solids in said water source, and wherein said ion exchange resin is regenerated using an acid; generating the service cycle treated water source comprising softened, acidic and low total dissolved solids (TDS) water having a hardness level of less than about 2 grains per gallon (gpg) and a pH less than about 6, wherein the treated water source may be used for washing and/or rinsing in a variety of cleaning applications; and regenerating the ion exchange resin upon exhaustion using an acid regenerant.
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Specification