US 6,685,840 B2Granted

Method for determining the dissolution rate of a solid water treatment product

AssigneeOndeo Nalco Company

InventorSteven R. Hatch

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Abstract

A method of making a solid water treatment product with an optimal rate of dissolution is described and claimed. A fluorescent tracer is used to determine the rate of dissolution of the solid water treatment product and the composition and method of manufacturing the solid water treatment product are adjusted as needed to make the rate of dissolution optimal. The solid water treatment product can be used in many industrial water treatment systems. When the solid water treatment product is used, the amount of solid water treatment product present in the water of the industrial water system can be determined, and adjusted, by using a fluorometer to measure the fluorescent signal of the fluorescent tracer present in the product and relating that measurement to the amount of product in the water itself.

Claims9

Dependent claims

A method of making a solid water treatment product, wherein said solid water treatment product has an optimal dissolution rate, comprising the steps of:

1) providing the ingredients to make a solid water treatment product, wherein said ingredients are selected from the group comprising:
a) Active Ingredients;
b) Optional Inactive Ingredients;
and
c) Fluorescent Tracer, wherein said Fluorescent Tracer is selected from the group consisting of inert fluorescent tracers and active fluorescent tracers;
wherein said solid water treatment product consists essentially of from about 10% to about 99.99% of said Active Ingredients, from about 0% to about 98% of said Optional Inactive Ingredients and from about 0.01% to about 10% of said Fluorescent Tracer;
2) preparing the solid water treatment product;
3) placing the solid water treatment product in test water;
4) providing a fluorometer;
5) using said fluorometer to measure the fluorescent signal of said fluorescent tracer in said test water;
6) repeating the measurement of fluorescent signal from Step 5) at regular intervals;
7) determining the rate of dissolution of solid water treatment product by analyzing the increase in fluorescent signal measured in Step 5) with time;
wherein if said rate of dissolution of solid water treatment product is optimal, then Steps 8) and 9) are optional, if said rate of dissolution of solid water treatment product is not optimal, then Steps 8) and 9) are required;
8) optionally adjusting the preparation of said solid water treatment product, based on the rate of dissolution determined in Step 7), in order to prepare a solid water treatment product with an optimal dissolution rate;
9) optionally repeating Steps 3), 4), 5), 6), 7) and 8) as necessary in order to obtain a solid water treatment product with an optimal dissolution rate.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/066,168Filed 31 Jan 2002
Published: US 2003/0141258 A131 Jul 2003
Granted: 3 Feb 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C02F 1/688
Devices for dosing the additives: devices in which the water progressively dissolves a solid compound
C02F 1/50
Treatment of water, waste water, or sewage: by addition or application of a germicide or by oligodynamic treatment
C02F 2103/023
Non-contaminated water, e.g. for industrial water supply: water in cooling circuits
C02F 2303/04
Specific treatment goals: disinfection