Nalco Chemical Company

Chandrashekar S Shetty

Manian Ramesh

Martha R Finck

Shu-Jen W Huang

Kristine S Siefert

Nang T Bui

Yvonne O Dunn

John W Sparapany

Daniel K Chung

Bhupati R Bhattacharyya, Deceased

Peter E Reed

Bhupati R Bhattacharyya

Linda R Robertson

Laura E Rice

Victoria M Kehoe

Uma Bhattacharyya

Biofilm formation is inhibited in commercial and industrial water systems through the addition of at least one plant oil.

Method of inhibiting biofilm formation in commercial and industrial water systems

A method for the dewatering of sludges in industrial waste waters utilizing a hydrophobically-modified coagulant copolymer of diallyldimethyl ammonium chloride and quaternized dimethylaminoethyl acrylate or quaternized dimethylaminoethylmethacrylate and a flocculant.

Hydrophobically modified polymers for sludge dewatering

A method for controlling pitch in papermaking systems which comprises the step of adding a water-soluble, silicon-containing polyelectrolyte copolymer coagulant to pulp and paper process water. The water-soluble, silicon-containing polyelectrolyte copolymer coagulant preferably comprises diallyldimethyl ammonium chloride and a vinyl alkoxysilane.

Silicon polyelectrolytes for pitch deposit control

A method for controlling pitch in papermaking systems which comprises the step of adding a hydrophobic polyelectrolyte copolymer coagulant to pulp and paper process water. The hydrophobic polyelectrolyte copolymer coagulant preferably comprises a first monomer selected from the group of hydrophilic monomers and hydrophobic monomers, and a vinyl siloxane monomer.

Vinyl alkoxysilane copolymer polyelectrolytes for pitch deposit control

A method for removing color from a paper mill waste effluent which comprises the step of adding a low molecular weight hydrophobic polymer dispersion to the effluent. The hydrophobic dispersion is preferably formed from the precipitation polymerization of at least one hydrophilic monomer and a hydrophobic monomer in the presence of a precipitation aid, water, a chain transfer agent, and an initiator.

Method of removing color from waste water using an aqueous dispersion

A method for conditioning food processing waste prior to chemical dewatering comprising the step of treating the food processing waste with an effective amount of at least one hydrophobic polymer coagulant.

Polymers for treatment of food processing wastes

A hydrophobic polyelectrolyte copolymer which is useful in the removal of color in paper mill waste water. The copolymer preferably comprises diallyldimethylammonium chloride and a hydrophobic monomer selected from the group consisting of quaternized dimethylaminoethylacrylates and quaternized dimethylaminoethylmethacrylates.

Hydrophobic polyelectrolytes used in removing color

A hydrophobic polyelectrolyte copolymer which is useful in the removal of color in paper mill waste water. The copolymer preferably comprises an acrylamide and a hydrophobic monomer selected from the group consisting of quaternized dimethylaminoethylacrylates and quaternized dimethylaminoethylmethacrylates.

Hydrophobic polyelectrolytes used in color removal

Oversprayed paint in a paint spray operation is detackified by dosing the water of the waste water system of such operation with a composition comprising an amphoteric polymer and aluminum salts. The amphoteric polymer contains at least about 10 mole percent of cationic mer units of monoethylenically unsaturated monomer and at least 1 mole percent of anionic mer units. The aluminum salt preferred is aluminum sulfate, or its hydrates, for example alum. The amphoteric polymers preferably contain DMAEM, DMAEM.multidot.H.sub.2 SO.sub.4, DMAEM.multidot.MCQ, or mixtures thereof, with acrylic acid, methacrylic acid, AMPS, or mixtures thereof. The amphoteric polymers may also contain neutral monomers such as (meth)acrylamide.

Anionic and nonionic solution polymers for paint detackification

Diallyl dimethyl ammonium chloride copolymers are effective in removing color from paper mill wastes when anionic vinyl monomers are used as the co-monomers.

Pulp waste color removal with diallyl dimethyl ammonium chloride

The invention provides a method for decolorizing an effluent stream from a pulp mill plant comprising the step of adding an effective amount of a decolorizing composition including a ferrous sulfate and a water-soluble cationic amine polymer.

Pulp and paper mill wastewater color removal

Oversprayed paint in a paint spray operation is detackified by dosing the water of the waste water system of such operation with a composition comprising a polymer and aluminum sulfate. The polymer contains at least about 10 mole percent of cationic mer units of monoethylenically unsaturated monomer.

Growing community of inventors

Lisle, IL, United States of America

Chandrashekar S Shetty