Anti-scaling composition for water systems
AssigneeCabot Corporation
InventorsMei Xin, William K. Barron, Timothy Wruble
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Abstract
Techniques are described for preparing a water filtration composition that includes activated carbon having an ash content of at least 10 wt. % and particles of a solubilizing agent. The solubilizing agent forms a water-soluble complex with cations (e.g., calcium ions). This increases the solubility of calcium ions and other scale-forming ions in water, thus suppressing scale formation on interior surfaces of water processing infrastructure. The activated carbon and the solubilizing agent are processed to have particle sizes in a same range, thus enabling the activated carbon and the solubilizing agent to be thoroughly mixed together.
Claims19
A composition comprising:
- activated carbon including an ash content of at least 10 weight (wt.) %;
- and
- solubilizing agent particles at a concentration from 0.1 wt. % to 5.0 wt. % of the activated carbon, wherein
- the activated carbon and the solubilizing agent particles each have a D50 particle size between 5 microns and 100 microns, the solubilizing agent particles being admixed with the activated carbon.
A method of treating a water supply, the method comprising:
- forming a water-soluble complex with cations by contacting water to be treated with a composition comprising activated carbon admixed with solubilizing agent particles, the carbon and the solubilizing agent particles having a D50 particle size between 5 microns and 100 microns, and the solubilizing agent particles comprising at least one of pyrophosphate, polyphosphate, hexametaphosphate, and polyacrylic acid, wherein the activated carbon includes an ash content of at least 10 weight %.
Dependencies are inferred from the claim text.