Nalco Company

Ecolab USA Inc.

Nalco Chemical Company

Ondeo Nalco Company

Steven R Hatch

Donald A Johnson

Andrew J Cooper

Craig W Myers

Carter Martin Silvernail

Ashish Dhawan

Paul R Kraus

William A Von Drasek

Paul Dominic Christian

Robert L Wetegrove

Arthur J Kahaian

Mita Chattoraj

Michael V Enzien

Jothibasu Seetharaman

Bosco P Ho

Narasimha M Rao

Pradeep Cheruku

Santanu Banerjee

Michael James Fehr

Phillip E Bureman

Robert W Shiely

May M Wu

An antimicrobial lighting system includes an antimicrobial lighting array that emits antimicrobial light within one or more antimicrobial wavelength ranges to inactivate one or more microorganisms on common touch surfaces. The common touch surfaces may include, for example, restaurant menus, airline safety instructions, pamphlets, instruction cards, or other common touch objects having a generally flat form factor, or that can be reduced to a flat form factor. Application of the antimicrobial light to the common touch surfaces may improve hygiene of such common touch surfaces and may help maintain microbial growth below acceptable levels.

Microbial decontamination of common touch articles

A method of preventing formation of rust on a metal surface is provided. The method may include applying a polyamine onto the metal surface and applying a compound of formula (I) or salt thereof onto the metal surface. The compositions and methods disclosed herein may be used to inhibit corrosion of a metal surface in contact with an aqueous system.

Galvanized metal corrosion inhibitor compositions and methods of use

A method for controlling treatment of an industrial water system is disclosed. The method comprises the steps of providing an apparatus for controlling delivery of at least one treatment chemical, the apparatus comprising at least one sensor and an electronic input/output device carrying out a protocol; measuring a parameter of the industrial water system using the at least one sensor; relaying the measured parameter to the electronic device; adjusting the protocol based on the measured parameter; delivering a concentrated treatment chemical into a stream of the industrial water system according to the adjusted protocol, the concentrated treatment chemical comprising an active ingredient, the active ingredient traced as necessary, the active ingredient having a concentration; repeating the measuring, the adjusting, and the delivering; and optionally repeating the steps for n-number of parameters, n-number of active ingredients, and/or n-number of concentrated treatment chemicals.

Treatment of industrial water systems

A system and method for stabilizing bromine in an industrial water system by monitoring and flexible dosing of chlorine oxidant and halide ion stabilizer residual levels. The system comprises chlorine oxidant, and a halide ion source with a halogen stabilizer.

Biofouling control

A trace amount of a tungstate added together with an ortho-phosphate and/or phosphonite is disclosed for inhibiting corrosion by a nitrogen fertilizer solution. In particular, an ammonium nitrate fertilizer solution is in contact with ferrous metal storage tanks, piping, and equipment surfaces. Tungstate added with an iron stabilizer including a dispersant polymer is also effective for inhibiting corrosion.

Tungstate based corrosion inhibitors

A method for controlling a cooling water tower comprising: providing a cooling tower system, which includes a recirculated evaporative cooling water stream, a source of make-up water, an evaporative cooling unit, a heat exchanger, a bleed off line, and a bleed-off valve which is in communication with said bleed-off line; providing a plurality of conduits through which said makeup water flows into said evaporative cooling water stream, wherein there is at least a first conduit that contains a weak acid cation ion exchange column and a second conduit that does not contain a weak acid ion exchange column, and wherein each conduit has at least one conduit valve; choosing a pH and a conductivity setpoint value and a deadband value above and below said setpoint value in said cooling tower system; measuring both the pH of said evaporative cooling water stream with one or more pH meters and conductivity of said evaporative cooling water stream with one or more conductivity meters; and implementing a response to said conductivity measurements and pH measurements is disclosed.

Method for chemistry control in cooling systems

A trace amount of a tungstate is disclosed for inhibiting corrosion by nitrogen fertilizer solution, in particular, an ammonium nitrate fertilizer solution, (UAN) in contact with ferrous metal storage tanks, piping, and equipment surfaces. Tungstate added with a dispersant polymer is also effective for inhibiting corrosion.

A method for locating hidden microorganism contaminated surfaces in industrial water systems is described and claimed. The method works by applying a solution or dispersion of a fluorogenic reagent in water to the hidden water contact surfaces of said industrial water system and allowing said fluorogenic reagent to react with any hidden microorganisms present, wherein said fluorogenic reagent is selected from the group of fluorogenic reagents that are known to react with microorganisms such that a fluorescent signal of said fluorogenic reagent is detectable in such a way as to make the detection of the fluorescent signal indicate that there are hidden microorganisms present on the water contact surfaces of the equipment and piping.

Method for locating hidden microorganism contaminated surfaces in industrial water systems

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.

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

A method for monitoring both the planktonic and sessile microbial populations in an industrial water system by the addition of a fluorogenic dye compound is described and claimed.

Growing community of inventors

Naperville, IL, United States of America

Steven R Hatch