Composition and method for treating water systems

Patent metadata

Field	Value
Publication number	US-9506016-B2
Application number	US-201314073705-A
Country	US
Kind code	B2
Filing date	Nov 6, 2013
Priority date	Nov 6, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A solid composition for treating cooling or heated water systems to remove scale, microorganisms and biofilm, and corrosion by-products. The composition for cooling towers and chilled water systems comprises chelating agents and an anionic surfactant. The composition for boilers and heated water systems comprises a sulfite, neutralizing amines, sodium phosphate, a polymethacrylate or polyacrylate polymer. A method for using such a treatment composition comprises contacting the treatment composition with substantially all parts of the water system.

First claim

We claim:

1. A solid composition for treating a boiler or heated water system, the composition consisting of:
around 10-36% by total weight of one or more amines;
around 30-44% by total weight of one or more sulfites;
around 15.5-27% by total weight of one or more phosphates;
around 5-15% by total weight of one or more polymers;
around 1.5-6% water; and
a conditioning agent to aid in forming the composition into tablets or pellets.

2. The solid composition according to claim 1 wherein the one or more amines consists of around 10-18% by weight cyclohexylamine and around 5-12% by weight morpholine.

3. The solid composition according to claim 2 wherein the one or more sulfites consists of around 15-24% by weight sodium metabisulfite and around 15-20% by weight sodium sulfite; and
the one or more phosphates consists of around 7.5-12% by weight of monosodium phosphate and around 8-15% by weight disodium phosphate.

4. The solid composition according to claim 1 wherein the polymer has a molecular weight of around 8000 to 15000.

Assignees

• Nch Corp

Inventors

• Henderson Ecaterina
• Gomez Pedro G
• Buxton John T
• Steimel Lyle H

Classifications

• C11D7/34

  containing sulfur · CPC title

• C02F1/683

  by addition of complex-forming compounds · CPC title

• C11D3/0073 Primary

  Anticorrosion compositions · CPC title

• C02F2303/20

  Prevention of biofouling · CPC title

• C02F1/004

  using large scale industrial sized filters · CPC title