Nalco Company

Ecolab USA Inc.

Nalco Chemical Company

Ondeo Nalco Company

Prasad Y Duggirala

Sergey M Shevchenko

Michael J Murcia

Peter E Reed

Xiaojin Harry Li

Dmitri L Kouznetsov

John David Morris

Steven John Severtson

Luiz Wanderley Bratfisch Pace

Weiguo Cheng

James J Svarz

Kristine S Salmen

Katherine M Broadus

Tommy Jacobson

Darlington Mlambo

Tarun Kumar Bera

Mika Salonen

Martti O Latva

Joanna L Shih

Grady E Worley

Luiz W Pace

Sergey Shevchenko

Sergey M Schevchenko

The disclosure provides methods and compositions for reducing the viscosity of black liquor. Also provided are methods of inhibiting deposition of scale and methods of processing black liquor. In some embodiments, the compositions include a carboxylate-containing polymer and an inorganic salt. In some embodiments, the compositions include a carboxylate-containing polymer, an inorganic salt, and a surfactant.

Black liquor viscosity reducing and anti-scale agent

Dewatering agents and methods of dewatering wastewater slurries are provided. Also disclosed are methods for improving the separation of solids from water. The water may be produced water, raw water, or wastewater, for example. The dewatering agents can be in solutions and the dewatering agent solutions may include various components in addition to soy protein, soy flour or a combination of soy flour and soy protein.

Enhancement of dewatering using soy flour or soy protein

Compositions and methods that preserve and enhance the brightness of pulp, and also improve the color of pulp or paper, when applied during different stages of a papermaking process, are disclosed. The compositions and methods maintain or enhance brightness, prevent yellowing, and enhance the performance of paper products. The compositions can include a mixture of reducing agents and can also include optical brighteners, chelants, polycarboxylates, or other additives. The mixture of reducing agents can include a borohydride, such as sodium borohydride, and any other reducing agent, such as a sulfite or bisulfite.

Processes and compositions for brightness improvement in paper production

The invention provides a method of improving the digestion of wood chips into pulp. The method involves: adding a cross-linked glycerol-based polymer additive to a solution used in the digestion process. This additive is unexpectedly effective at facilitating digestion. The branched and ether structure of the additive allows it to withstand the harsh nature of a high stress environment. In addition, it is more soluble in the harsh condition than other surfactants. The structure, resistance, and particular balance between hydrophobic and hydrophilic regions, causes the additive to increases the interaction between the wood chips and the digestion chemicals. This in turn reduces the costs, the amount of additive needed, and the amount of reject wood chunks that result from the digestion process.

Cross-linked glycerol based polymers as digestion aids for improving wood pulping processes

The invention is directed towards methods and compositions for processes based on the combination of organic peroxyacids and ammonium salts that preserve and enhance the response to optical brighteners (fluorescent whitening dyes), brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The composition and method improve response to optical brighteners (fluorescent whitening dyes), maintain and/or enhance brightness and enhance the performance of paper products. Used in combination with optical brighteners the described agents produce a synergistic effect not previously identified in the paper process.

Method for improving brightness in bleached pulp

The invention provides methods and compositions for measuring the formation of scale within a process system. The method involves measuring changes in the cell fouling as reflected on the refraction index measurements of a liquid medium with a refractometer and determining the scale formation from changes in the cell fouling factor. This allows for a refractometer to determine the formation of scale in locations that otherwise would not be measurable.

Method of deposition monitoring

The invention provides a method of efficiently producing branched, cyclic glycerol-based polymer surface active products having ester and alkyl functional groups with a co-product as anti-biodegrading agent from inexpensive readily available glycerol monomer. The method involves polymerizing glycerol or glycerol with at least another monomer to multiple other monomers in the presence of particular amount of a strong base as the catalyst under a particular distillation environment. The polyol then undergoes esterification, alkylation and crosslinking in presence of particular amount of a catalyst under a particular low activity atmospheric environment. The glycerol-based polymer surface active products produced by the inventive method are beneficial for reducing lignin, extractives and rejects levels in pulping process of papermaking industry.

Glycerol based polymer surface active chemistry and production

Methods and compositions for improving dewatering efficiency during a papermaking or pulp drying process are disclosed. The methods can include a step of adding a dewatering agent solution to a location on a paper machine or pulp drying machine. The dewatering agent solution can include a soy based component. The soy based component can be soy flour or soy protein. The dewatering agent solution can be added to a wet end location of the pulp drying machine or paper machine or it can be sprayed onto a paper sheet prior to entering the press section of a paper machine. Additional dewatering agent solutions can also be added. The additional dewatering agent solutions can include cationic polymers or surfactants.

Enhancement of sheet dewatering using soy flour or soy protein

Compositions and processes that enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process involving optical brighteners are identified. Used in combination with optical brighteners and/or chelants the described agents produce a synergistic effect not previously identified in the paper process.

Compositions and processes for paper

The present disclosure is directed to a composition comprising activated magnesium hydroxide, a thickening agent for said magnesium hydroxide, water, an emulsifier, and an oil comprising tall oil fatty acid. In certain embodiments, the composition contains no caustic soda or hydrogen peroxide. The composition comprises from about 5% to about 70% by weight magnesium hydroxide, based upon the weight of the composition. The composition is useful in pulp deinking. In certain embodiments, the thickening agent may be xanthan gum, and the emulsifier may be sodium lauryl sulfate.

Deinking a cellulosic substrate using magnesium hydroxide

An apparatus for feeding one or more chemicals into a process stream of a pulp process is disclosed, as well as a method of utilizing the apparatus for feeding one or more chemicals into a pulp process is disclosed.

Method and arrangement for feeding chemicals into a pulp process stream

The invention provides a method of improving the digestion of wood chips into pulp. The method involves: adding a liphohydrophilic glycerol-based polymer additive to a solution used in the digestion process. This additive is unexpectedly effective at facilitating digestion. The branched and ether structure of the additive allows it to withstand the harsh nature of a highly alkaline environment. In addition, it is more soluble in high pH than other surfactants. The structure, resistance, and particular balance between hydrophobic and hydrophilic regions, causes the additive to increases the interaction between the wood chips and the digestion chemicals. This in turn reduces the costs, the amount of additive needed, and the amount of reject wood chunks that result from the digestion process.

Lipohydrophilic glycerol based polymers as digestion aids for improving wood pulping processes

A composition and method for deinking is disclosed. The composition and method contain an activated magnesium hydroxide or a magnesium hydroxide.

Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the oxidative agents produce a synergistic effect not previously identified in the paper process.

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Naperville, IL, United States of America

Prasad Y Duggirala