Ecolab USA Inc.

Other

Nalco Chemical Company

Nalco Company

Ondeo Nalco Company

Dennis L MacDonald

Bruce A Keiser

Cheng-Sung Huang

Maureen B Nunn

Zhi Quan Chen

Jane B Wong Shing

Francois Batllo

Brian T Holland

Ronald S Doles

Wen Bai

Raymond D Miller, Jr

Carmen Y Ortiz

Colloidal compositions and methods of preparing same are provided. The colloidal compositions include a silicate and a metal dispersed therein. The colloidal compositions can further include a stabilizer, such as a quaternary amine, to enhance the and dispersion of the metal loading within the silicate. The colloidal compositions can be made such that the metal is dispersed within the silicate in a controlled manner.

Colloidal compositions and methods of preparing same

The invention provides a method for improving the effectiveness of colloidal silica. The method involves removing enough charged impurities from the colloid to prevent the charged particles from causing the colloid to become a viscous gel. The method however also involves not removing too many charged particles so the silica material doesn't gel by cross-linking with itself. This method is quite effective because it recognizes that materials that have accumulated during the formation of the colloid do perform an important function, but they can perform better at a lower concentration.

Process for producing high solids colloidal silica

Colloidal silica having a controllable broad particle size distribution and a controllable minimum particle size is disclosed and claimed. Particles below a predetermined size are excluded from the product colloidal silica of the invention. A method for continuously producing the desired colloidal composition is disclosed comprising the steps of providing preformed silica particles having a surface area which controls the particle size of the colloidal silica product, adding a feed silica comprising an alkaline solution and silicate at a feed rate which is less than a nucleation rate.

Method of producing silica sols with controllable broad size distribution and minimum particle size

A stable aquasol containing colloidal silica having a surface area of from about 700 m /g to about 1100 m /g, and an S-value of from about 20 to about 50; wherein the colloidal silica is not surface treated; wherein the molar ratio of SiO /Na O in the colloidal silica is greater than about 13.0:1 and is less than about 17.0:1; and wherein the aquasols have a percent by weight SiO solids level of from about 7.00 percent to about 16.80 percent is described and claimed.

Stable colloidal silica aquasols

Disclosed are stable, aqueous colloidal silicas having surface area of greater than 700 m /g and S-values of from 20-50. These colloidal silicas do not require treatment with surface treatment agents such as aluminum to achieve stability. These colloidal silica aquasols can be produced and stored at concentrations of greater than 7 percent by weight SiO solids, and even as high as 15 percent by weight solids or higher, and remain stable at room temperature for at least 30 days compared to art-known silica aquasols. These colloidal silica sols demonstrate advantageously improved performance over art-known colloidal silica sots in applications such as in drainage and retention in papermaking processes. Also disclosed are processes for making aqueous colloidal silicas of the invention and the use of such colloidal silicas in papermaking processes.

Method of making colloidal silica

The present invention 10 discloses a device used as a security locking device for surfboards 12. The present invention discloses a U-shaped member 14 having parallel leg members which effectively encircle the surfboard 12 with the leg members being slightly wider than the thickness of a surfboard and slightly longer than the width of a surfboard which operates by sliding a surfboard 12 into and between the parallel legs of the U-shaped member 14 and thereafter, placing a locking member 30 that connects the two parallel legs of the device about the surfboard 12. There is also a cable member 24 which can be used to then attach the locking member 30 to any object or structure which will thereby prevent movement of the surfboard 12 beyond the length of the cable 24. The locking mechanism 30 of the present invention 10 has two pivotal leg members 32 which when rotated to the operative position 40 form divergent leg members thereby serving as a security locking upstanding rack device for said surfboard 12 when using one or more of said devices 10 in conjunction with the cable member 32.

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Wheaton, IL, United States of America

Dennis L MacDonald