Ecolab USA Inc.

Nalco Company

Dorota Smoron

Shawnee M Wilson

Weiguo Cheng

Prasad Y Duggirala

Gary S Furman, Jr

Katherine M Broadus

David J Castro

Mei Liu

Gary Samuel Furman, Jr

Zhiyi Zhang

David Sirois

Khaled Zouaoui

Michael Kjerulf

Christopher Powers

Katherin M Broadus

A method of treating brown stock in a brown stock washing process is provided. The method includes measuring a refractive index of a brown stock; and dosing an additive to the brown stock according to at least the refractive index of the brown stock. A system for controlling dosing of an additive to a brown stock washing process is also provided. The system includes a refractive index measurement device; a controller configured to receive data provided by the refractive index measurement device and transform the data into additive addition output instructions; and an additive delivery unit configured to receive and execute the additive addition output instructions from the controller.

Process to optimize brown stock washing unit operations

A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of an anionic first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second anionic flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.

Anionic preflocculation of fillers used in papermaking

The invention provides methods and compositions for increasing the strengthening effect of a starch coating on paper. The method involves contacting the starch with a synthetic polymer before the starch is cooked. This changes how the starch gelatinizes and how the polymer gets distributed on the paper resulting in greater paper surface strength.

Method of increasing paper surface strength by using acrylic acid/acrylamide copolymer in a size press formulation containing starch

A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of microparticle prior to, simultaneous to, and/or after addition of a first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the microparticle and/or the first flocculating agent is added.

Preflocculation of fillers used in papermaking

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Hoffman Estates, IL, United States of America

Dorota Smoron