Nalco Chemical Company

US Government As Represented by the Secretary of the Army

Ondeo Nalco Company

James E Whitten

Bruce A Keiser

Joseph C Alfano

John E Hoots

Gregory William Peterson

Kevin J Moeggenborg

Martin R Godfrey

Karen R Tubergen

Narasimha M Rao

Michael James Fehr

Jeffrey P Rasimas

Evan J Watters

Processes of detecting the presence of an environmental challenge such as contact with an acidic/acid-forming and/or oxidizable gas are provided whereby a metal oxyhydroxide is used as a detection agent. The metal oxyhydroxide will irreversibly interact with an acidic/acid-forming and/or oxidizable gas causing a red-stretch of the emission spectra. This red-stretch alters the ratio of emission intensities at higher wavelengths relative to lower wavelengths. A reduced post-exposure photoluminescence ratio is, therefore, used to detect exposure to such a gas or environmental challenge. The materials and processes may be used as a residual life indicator for filtration systems or for the detection of environmental challenges.

Method of sensing acidic/acid-forming and oxidizable gases for use as a residual filter life indicator

Colloids comprising amorphous borosilicate particles, wherein said borosilicate particles are not borosilicate glass; are described and claimed. These colloids have been found to be useful in aqueous systems, specially in papermaking.

Colloids comprising amorphous borosilicate

The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.

Method of increasing drainage in papermaking using colloidal borosilicates

The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculent and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.

Method of increasing retention in papermaking using colloidal borosilicates

Method for flocculating a papermaking furnish using colloidal borosilicates

Process for producing colloidal borosilicates

Use of colloidal borosilicates in the production of paper

A solid-state fluorometry instrument is provided. The instrument is based on either diode laser or light-emitting diode (LED) excitation sources that are capable of being used in a wide range of applications. The solid-state diode laser based fluorometer instrument monitors fluorescent tracers, particularly suitable for industrial water sample stream applications. Using the instrument, a solid-state diode laser or light-emitting diode (LED) is used as an excitation source to excite fluorescent tracer molecules. The fluorescence resulting from the diode laser excitation is imaged with a lens onto a silicon photodiode detector. An optical filter is placed between the sample cell and the photodiode detector to reject scattered laser light. The output from the photodiode is amplified to produce an output voltage proportional to the quantity of fluorescence striking the photodiode detector. Since fluorescence is proportional to the concentration of a fluorophore present in the sample stream, continuous monitoring of a voltage output may be performed which further allows real time measurement of concentration of a fluorescent tracer present in, for example, a sample stream.

Method for using an all solid-state fluorometer in industrial water system applications

The present invention provides for an improved method for monitoring the concentration of molecules and chemical treatment agents in ceramic slurries and powders.

Tracing of process additives in industrial ceramics applications

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Naperville, IL, United States of America

James E Whitten