Nalco Chemical Company

Ecolab USA Inc.

Ondeo Nalco Company

David P Workman

John E Hoots

Kevin J Moeggenborg

Mingli Wei

Michael J Murcia

Darlington Mlambo

Douglas G Kelley

David R Szymborski

Rodney H Banks

Ronald V Davis

Paul Young

Martin R Godfrey

Barbara E Moriarty

Mita Chattoraj

Kristy M Bailey

Brian T Holland

Francois Batllo

Kim Long

Michael James Fehr

Sascha Welz

Michael Romba

Sasireka S Ramesh

Jeffrey P Rasimas

John M Krasniewski

Konstantinos Demadis

Nancy L Casselman

Kim M Long

Michael A Romba

A filtration apparatus and methods of installing, using, and retracting the same. A filtration apparatus includes a compression gland, a ball valve, and a filter pipe. A distal portion of the filter pipe has one or more filtration holes. The filtration apparatus may be installed in a process pipe and the distal portion of the filter pipe may be disposed within the process pipe. The filter pipe can be easily retracted from the process pipe without interruption of the industrial process. The filtration apparatus can be automatically cleaned by compressed air or water.

Method and apparatus for filtration of samples for online analyzers

A method of preparing a particulate material comprising the steps of adding silicic acid solution, optionally doped with aluminum, optionally added to a slurry of pre-existing nanoparticles at a neutral to slightly acidic pH of no more than seven, and at a temperature of about 20&#xb0; to 30&#xb0; C. This yields a polysilicate particulate dispersion. Then, the pH of the dispersion is raised to greater than seven, to stabilize/reinforce particles of the particulate dispersion. Optionally, the particles may be dried, and have increased porosity and surface area.

Production and use of polysilicate particulate materials

This invention relates to a method for inhibiting the formation and deposition of silica scale in water systems. The method includes treating the water in such water systems with an effective amount of a polyamide that contains secondary amine and/or ether and amide functional groups.

Method for inhibiting the formation and deposition of silica scale in water systems

A method for monitoring the microbiological contamination of opaque media is described and claimed. In this method, a Fluorogenic Dye is added to an Aliquot of opaque medium. After a certain time period, a fluorometer capable of measuring fluorescent signals in an opaque medium is used to measure the fluorogenic signals of the Fluorogenic Dye and the Reacted Fluorogenic Dye. A Useful RATIO of the fluorescent signal of the Reacted Fluorogenic Dye to the fluorescent signal of the Fluorogenic Dye is calculated and the information gleaned from the RATIO is used to ascertain the state of microbiological contamination in the opaque medium.

Measurement of microbiological activity in an opaque medium

Use of control matrix for cooling water systems control

Fluorescent monomers and polymers containing same for use in industrial water systems

The present invention relates to a method for inhibiting the formation and deposition of silica scale in water systems. The method includes treating the water in such water systems with an effective amount of a polyamide that exhibits secondary amine and/or ether and amide functional groups.

Method for inhibiting the formation and deposition of silica scale in

A method for binding ceramic materials in aqueous media is disclosed. The method utilizes water-soluble cross-linked polyamides prepared by condensation polymerization for binding various classes of ceramic materials.

Cross-linked polymide binders for ceramics manufacture

The present invention provides methods for treating industrial water systems. Pursuant to the method, the industrial water systems are treated with an effective amount of a hindered amine. In further embodiments, the hindered amine also acts as a steam tracer.

Hindered amines for treating industrial water systems

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Naperville, IL, United States of America

David P Workman