Methods and apparatus for controlling water hardness

Patent metadata

Field	Value
Publication number	US-12024451-B2
Application number	US-202016948738-A
Country	US
Kind code	B2
Filing date	Sep 30, 2020
Priority date	Apr 21, 2009
Publication date	Jul 2, 2024
Grant date	Jul 2, 2024

Abstract

The present invention is related to methods, apparatuses, and compositions for controlling water hardness. The methods, apparatuses and compositions also reduce scale formation. The present invention includes substantially water insoluble resin materials. The resin materials may be loaded with a plurality of cations.

First claim

What is claimed is:

1. A method for treating water comprising:
providing a water treatment apparatus comprising an inlet, an outlet, a first water treatment reservoir comprising a water treatment composition;
intaking the water source through the inlet;
contacting the water source with the water treatment composition to form a treated water source;
wherein the water treatment composition comprises a substantially water insoluble, weakly acidic cation resin material loaded with a plurality of one or more multivalent cations such that the resin material is exhausted; and wherein the resin material has a bed depth of less than about two feet; and

discharging the treated water source through the outlet;
wherein the resin material includes an acrylic acid polymer crosslinked with divinyl benzene, wherein the acrylic acid polymer is less than 8% crosslinked, and wherein the resin material has a surface comprising functional groups comprising carboxyl groups, a particle size of from 0.5 mm to 1.6 mm, and a uniformity coefficient of 1.2 or less or 1.5 to 1.9; and
wherein the treated water source comprises greater than 4 ppm total organic carbon.

2. The method of claim 1 , wherein the multivalent cations comprise a mixture of calcium and magnesium ions.

3. The method of claim 1 , wherein the composition does not precipitate water hardness ions out of the source of water when contacted with the water source.

4. The method of claim 1 , wherein the substantially insoluble resin material provides a polymer material to the water source, and wherein the polymer material is a polymer having a molecular weight of about 150 to about 100,000.

5. The method of claim 1 , wherein the water treatment apparatus does not conduct significant ion exchange.

6. The method of claim 1 , further comprising heating the water source prior to the step of contacting the composition; and/or agitating the composition during the contacting step.

7. The method of claim 1 , wherein the composition is agitated by means comprising flowing water through the water treatment reservoir, fluidization, mechanical agitation, air sparge, eductor flow, baffles, flow obstructers, static mixers, high flow backwash, recirculation, or a combination thereof.

8. The method of claim 1 , further comprising the step of increasing the pH of the water source prior to or during the step of contacting the composition.

9. The method of claim 1 , wherein the treated water reduces scale formation on a surface contacted by the treated water source versus the water source.

10. The method of claim 1 , wherein the resin material includes a gel type resin structure, a macroporous type resin structure, or a combination thereof.

11. The method of claim 1 , wherein the water source is provided to the water treatment reservoir at a flow rate of about 50 feet per minute to about 200 feet per minute.

12. A method for reducing scale formation, comprising:
providing a water treatment apparatus comprising an inlet, an outlet, a first water treatment reservoir comprising a water treatment composition comprising a substantially water insoluble resin material;
intaking the water source through the inlet;
contacting the water source with the water treatment composition to form a treated water source,
wherein the substantially water insoluble resin material is loaded with a plurality of one or more multivalent cations such that the resin material is exhausted; wherein the resin material has a bed depth of less than about two feet; and wherein the water treatment composition provides from about 10 to about 1000 parts per billion of the substantially water insoluble resin material to the treated water source;

contacting the treated water source with an article; and
discharging the treated water source through the outlet;
wherein the resin material includes an acrylic acid polymer crosslinked with divinyl benzene, wherein the acrylic acid polymer is less than 8% crosslinked, and wherein the resin material has a surface comprising functional groups comprising carboxyl groups, and a particle size of from 0.5 mm to 1.6 mm, and a uniformity coefficient of 1.2 or less or 1.5 to 1.9; and
wherein the treated water source comprises between greater than 4 ppm total organic carbon.

Assignees

• Ecolab Usa Inc

Inventors

• Monsrud Lee J
• Sun Xin
• Mills Kristen
• Prideaux Douglas J
• Benson Beth E
• Solomon Kim R
• Olson Keith E

Classifications

• C02F2303/22

  Eliminating or preventing deposits, scale removal, scale prevention (C02F1/042, C02F1/4602, C02F5/00 take precedence) · CPC title

• C02F2001/425

  using cation exchangers · CPC title

• C02F5/02

  Softening water by precipitation of the hardness · CPC title

• E03B7/074

  Arrangement of water treatment devices · CPC title

• C02F1/42 Primary

  by ion-exchange (ion-exchange in general B01J) · CPC title