Nalco Chemical Company

Nalco Canada Inc.

Ondeo Nalco Company

Daniel K Chung

Manian Ramesh

Anthony G Sommese

Chandrashekar S Shetty

Karen R Tubergen

Stephen B Warrick

Steven B Warrick

Use of polymers containing vinylamine/vinylformamide for the treatment of food processing wastewater

The present invention provides a method for conditioning food processing waste prior to mechanical dewatering with the use of environmentally friendly coagulants and flocculants. The method of the present invention comprises treating these waste waters with an effective amount of a vinylamine polymer including from about 1 to about 100 mole percent vinylamine and from about 1 to about 99 mole percent of at least one monomer selected from the group consisting of amidine, vinylformamide, vinyl alcohol, vinyl acetate, vinyl pyrrolidinone and the esters, amides, nitriles and salts of acrylic acid and methacrytic acid. In an embodiment, the method of the present invention includes the further step of adding an effective amount of at least one flocculant to the food processing waste. The flocculent effectively agglomerates a portion of the colloidal organic solids into suspended solids.

A liquid slurry of bentonite which comprises bentonite, water, a polyacrylate, and a sodium salt of silicic acid. Optionally, a sulfonate is present in an amount of between about 10 to about 30% by weight.

Liquid slurry of bentonite

A process for preparing a liquid slurry of bentonite which comprises the steps of charging a reactor vessel with between about 25 to about 75% of water by weight. The water is heated to a temperature range between about 50.degree. C. to about 95.degree. C. The reactor vessel is charged with between about 0, 1 and about 10% of sodium salt of silicic acid by weight and with between about 15 to about 35% of bentonite by weight. The reactor vessel is also charged with between about 10 to about 30% of a polyacrylate by weight.

The invention is a method for clarifying ink-containing effluent water from recycled paper production which comprises the step of adding a water-soluble, surface active, silicon-containing polyelectrolyte polymer coagulant to the ink-containing effluent water from recycled paper production, wherein the polymer has from 0.01 to 10 mole percent of a vinyl alkoxysilane monomer. A preferred silicon-containing polyelectrolyte polymer is the product of a free radical synthesis from vinyltrimethoxysilane and diallyldimethylammoniumchloride monomers.

Clarification of deinking process water

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

The present invention relates generally to the treatment of food processing wastes. More particularly, the present invention provides a chemical treatment method that effectively removes fat, blood, tissue and other solids from food processing waste, using novel hydrophobically associating copolymer compositions. These polyelectrolyte compositions are water soluble silicon containing copolymers prepared from dialkyldiallyl ammonium halides, particularly diallyldimethyl ammonium chloride (DADMAC) and vinyl alkoxysilanes, preferably vinyltrimethoxysilane (VTMS).

DADMAC/vinyl trialkoxysilane copolymers for treatment of food processing

The invention relates to the clarification of deinking process waters which result from the recycling of paper. More specifically, the present invention relates to the use of containing vinylamine as water clarifying agents in said processes.

Clarification of deinking process waters using polymers containing

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 flocculating agent which comprises: a particulate polyethylene oxide; an inert liquid vehicle comprising a mixture of a glycol and glycerine, wherein the specific gravity of the polyethylene oxide is approximately the same as the specific gravity of the inert liquid vehicle; a suspension agent, and, optionally, an acidic compound.

Liquid suspension of polyethylene oxide for use in treating paper and

A flocculating agent which comprises: a particulate ethylene oxide polymer present in an amount of between about 20 to about 35% by weight; an inert liquid vehicle comprising a mixture of a glycol which is present in an amount between about 25 to about 30% by weight, and glycerine which is present in an amount between about 45 to about 50% by weight, wherein the specific gravity of the ethylene oxide polymer is approximately the same as the specific gravity of the inert liquid vehicle; and a suspension agent which is present in an amount between about 0.4 to about 0.6% by weight, wherein the flocculating agent has a viscosity in the range between about 1800 to about 5900 cps.

A method of treating BCTMP/CTMP wastewater to improve retention and purification of cellulose fiber suspension and clarification of the BCTMP/CTMP wastewater which comprises the addition of a cationic, water soluble coagulant having a molecular weight less than 15,000,000 in an amount of about 1 to about 300 ppm; and a high molecular weight flocculant selected from the group consisting of: nonionic polymers having a molecular weight in the range between about 500,000 to about 30,000,000, low charge cationic polymers having a molecular weight in the range between about 5,000,000 to about 30,000,000, and low charge anionic polymers having a molecular weight in the range between about 5,000,000 to about 30,000,000, in an amount of about 0.1 to about 100 ppm.

Method of treating BCTMP/CTMP wastewater

A process in which fine paper is made by forming an aqueous cellulosic suspension comprising fibers, a precipitated calcium carbonate filler and a cationic starch strengthening agent, passing the suspension through one or more shear stages, draining the suspension to form a sheet and drying the sheet. The retention and drainage properties of the suspension are substantially improved via the addition of a cationic coagulant having a molecular weight in the range between about 2,000 to about 500,000 to the suspension prior to any of the shear stages, an anionic flocculant having a molecular weight of at least 500,000 to the suspension after the low molecular weight coagulant but before any of the shear stages, and an inorganic material selected from the group consisting of: bentonite, colloidal silica and other inorganic microparticle materials, to the suspension after at least one of the shear stages.

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Burlington, Canada

Daniel K Chung