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Nalco Chemical Company Patents
Assignee:
Nalco Chemical Company
Address:
Naperville, IL
No. of patents:
1155
Patents:












Patent Number Title Of Patent Date Issued
RE33856 Terpolymer compositions for aqueous drilling fluids March 24, 1992
A method of improving high temperature fluid loss and rheology stabilization of high calcium brine clay-containing oil well drilling fluids which comprises adding thereto a stabilizing amount of a water-soluble terpolymer composition comprising:said composition containing lignin, modifie
RE33855 Terpolymer composition for aqueous drilling fluids March 24, 1992
A method of improving high temperature fluid loss and rheology stabilization of high calcium brine clay-containing oil well drilling fluids which comprises adding thereto a stabilizing amount of a water-soluble terpolymer composition comprising:said composition containing lignin, modifie
RE30066 Method for selectively removing chromates August 7, 1979
Removal of chromate ions from water containing a large amount of total dissolved solids by contacting the water with an acidified weakly basic anion exchange resin, preferably in .[.microporous.]. .Iadd.macroporous .Iaddend.form, to selectively remove chromates from the water.
RE29241 Water clarification process May 31, 1977
1. A process for clarifying water which has solid materials suspended therein and which has at least 0.1 ppm of residual chlorine comprising the steps of adding a minor amount of a .Iadd.condensation .Iaddend.polymer .[..[.of ammonia and ethylene dichloride.]..]. .Badd.selected from the
6461518 Method for inhibiting the formation and deposition of silica scale in water systems October 8, 2002
This invention relates to a method for inhibiting the formation and deposition of silica scale in water systems. The method includes treating the water in such water systems with an effective amount of a polyamide that contains secondary amine and/or ether and amide functional groups.
6451169 Structurally rigid polymer coagulants as retention and drainage aids in papermaking September 17, 2002
This invention concerns a method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective amount of a structurally rigid polymeric coagulant and an effective flocculating amount of a flocculant and a microparticle.
6444091 Structurally rigid nonionic and anionic polymers as retention and drainage aids in papermaking September 3, 2002
This invention concerns a method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective amount of a structurally rigid nonionic or anionic polymer.
6440476 Method to improve quality and appearance of leafy vegetables by using stabilized bromine August 27, 2002
A method to extend the shelf-life, reduce the microbial load, and enhance product appearance and quality in leafy vegetables or other fresh commodities of the like comprising applying directly to the leafy vegetable a stabilized aqueous alkali or alkaline earth metal hypobromite solu
6436711 Fluorometric control of aromatic oxygen scavengers in a boiler system August 20, 2002
A method of automatically controlling the addition rate of Fresh Oxygen Scavenger Product and Ultimate Oxygen Scavenger Product to a Boiler System is described and claimed. The method is based on the inherent fluorometric properties of certain Fresh Oxygen Scavenger Products and certain
6432271 Method of increasing retention and drainage in papermaking using high molecular weight water-sol August 13, 2002
This invention is directed to a method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective flocculating amount of a high molecular weight water-soluble anionic or nonionic dispersion polymer.
6426383 Preparation of water soluble polymer dispersions from vinylamide monomers July 30, 2002
The present invention relates to a novel process for the production of a water soluble polymer dispersion from vinylamide monomers, and, more particularly, polymers formed from N-vinylformamide monomers.
6423801 Branched polyammonium compounds of high molecular weight and processes for producing said compou July 23, 2002
The invention is concerned with water soluble high-molecular weight quaternary ammonium graft polymer, wherein ammonium salt side chains are grafted onto a polyamine backbone under free radical conditions, and wherein the initiator system comprises a free radical-producing oxidizing
6423267 Stable oxidizing bromine formulations, method of manufacture and uses thereof for biofouling con July 23, 2002
Stable biocide formulations containing oxidizing bromine are provided for biofouling control in industrial water systems. The formulations contain at least one stable oxidizing bromine compound that is prepared from at least one oxidizing chemical reagent, at least one bromine source and
6419879 Composition and method for controlling biological growth using stabilized sodium hypobromite in July 16, 2002
A synergistic composition and method for controlling biological growth in industrial fluids are disclosed, wherein the composition comprises stabilized sodium hypobromite and at least one compound selected from the group consisting of coco alkyldimethylamine oxide, n-coco alkyltrimet
6413433 Method for dewatering of sludge July 2, 2002
A process for dewatering of sludge, wherein said sludge comprises solids and water, comprising the steps of:a) adding a cationic dispersion polymer and a microparticle to said sludge, wherein said cationic dispersion polymer can be added before or after or simultaneous with the addition
6403726 Water soluble polymer containing dithiocarbamate functionalities June 11, 2002
The simultaneous precipitation of soluble heavy metal ions from semiconductor wastewater containing abrasive solids and enhancement of microfilter operation is achieved through the addition of an effective amount of a water-soluble polymer containing dithiocarbamate functionalities t
6398967 Method of clarifying water using low molecular weight cationic dispersion polymers June 4, 2002
This invention is directed to a method of clarifying water comprising adding to the water an effective clarifying amount of a low molecular weight water-soluble cationic dispersion polymer prepared by polymerizing one or more cationic monomers and one or more nonionic monomers and one or
6380431 Fluorescent monomers April 30, 2002
Fluorescent monomers are described and claimed.
6379720 Compositions containing hops extract and their use in water systems and process streams to contr April 30, 2002
Biological fouling is effectively controlled in water systems and process streams through the addition of hops extract.
6375829 Method and apparatus for measuring scaling capacity of calcium oxalate solutions using an electr April 23, 2002
This invention is directed to a method and apparatus for measuring the rate of calcium oxalate scale formation in a continuously flowing solution having a pH of from about 2 to about 3 comprising measuring the rate of deposition of calcium oxalate scale from the solution on to a quartz
6372882 Method for producing substantially dry water-insoluble polymers for improved flocculation in the April 16, 2002
The present invention is a method of producing substantially dry water insoluble polymers from poly alkyl esters of vinylic monomers for use in a method for the clarification of red mud-containing liquors generated in the Bayer process for the recovery of alumina from bauxite ore. The
6372806 Method of making colloidal silica April 16, 2002
Disclosed are stable, aqueous colloidal silicas having surface area of greater than 700 m.sup.2 /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
6372805 Colloids comprising amorphous borosilicate April 16, 2002
Colloids comprising amorphous borosilicate particles, wherein said borosilicate particles are not borosilicate glass; are described and claimed. These colloids have been found to be useful in aqueous systems, specially in papermaking.
6372089 Method of making paper April 16, 2002
Disclosed are stable, aqueous colloidal silicas having surface area of greater than 700 m.sup.2 /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
6369894 Modular fluorometer April 9, 2002
Described and claimed is a modular fluorometer and a method of using same to control an industrial water system, wherein said modular fluorometer comprises:one or more units with each unit comprising:a channel comprising an optically appropriate cell through which a water sample flows;a
6369182 Cationic latex terpolymers for wasterwater treatment April 9, 2002
This invention is directed to a cationic terpolymer comprising(a) a first monomer unit selected from acrylamide and methacrylamide;(b) a second monomer unit selected from dimethylaminoethyl acrylate methyl chloride quaternary salt, 3-(acrylamido)propyltrimethylammonium chloride, 3-(methacryl
6365116 Rheology modification of settled solids in mineral processing April 2, 2002
The present invention comprises a method for reducing the viscosity of the settled mud or underflow of a raked thickener thereby reducing the torque necessary to move the rake blade through the settled mud. The method includes the step of delivering a viscosity modifier to the settled mu
6365052 Very high molecular weight cationic dispersion polymers for dewatering animal farm wastewater April 2, 2002
This invention is directed to a method of dewatering animal farm waste water comprising:(1) adding an effective amount of a cationic dispersion polymer having an RSV of at least 24, the dispersion polymer prepared by polymerizing under free radical forming conditions in an aqueous soluti
6361653 Method of increasing retention in papermaking using colloidal borosilicates March 26, 2002
The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculent and/or starch, with or without the ad
6361652 Method of increasing drainage in papermaking using colloidal borosilicates March 26, 2002
The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the ad
6358746 Fluorescent compounds for use in industrial water systems March 19, 2002
Fluorescent compounds of the formula: ##STR1##wherein R.sub.1 and R.sub.2 are either both SO.sub.3 M, or one of R.sub.1 and R.sub.2 is SO.sub.3 M and the other is COOM, where M is selected from the group consisting of H, Na, K, Rb, Cs, Li or ammonium, are described and claimed. These
6358364 Method for flocculating a papermaking furnish using colloidal borosilicates March 19, 2002
The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the ad
6352675 Process for removing heavy metals from a caustic fluid stream March 5, 2002
The present invention provides both reagents and a process for removing heavy metals from a caustic fluid stream by the addition of reagents which are not corrosive or deleterious. Specifically, the present invention is directed to removing heavy metals from a Bayer liquor in an aluminum
6344531 Fluorescent water-soluble polymers February 5, 2002
Water-soluble polymers of Formula Useful comprising from about 0.001 to about 10.0 mole percent of a Repeating Mer Unit represented by the formula: ##STR1##wherein a is an integer of from 1 to 10, R.sub.1 is selected from the group consisting of hydrogen and methyl groups, R.sub.2 an
6336058 Use of control matrix for boiler control January 1, 2002
Described and claimed is a method of controlling a boiler in which control is based on information from a control Matrix applicable to the specific parameters of the boiler. The control matrices include (a) Polymer Based All-in-One Product; (b) Residual Phosphate Polymer Product with Sca
6331229 Method of increasing retention and drainage in papermaking using high molecular weight water-sol December 18, 2001
This invention is directed to a method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective flocculating amount of a high molecular weight water-soluble anionic or nonionic dispersion polymer.
6329165 Measurement and control of sessile and planktonic microbiological activity in industrial water s December 11, 2001
A method for monitoring both the planktonic and sessile microbial populations in an industrial water system by the addition of a fluorogenic dye compound is described and claimed.
6322749 Composition and method for inhibiting the growth of microorganisms including stabilized sodium h November 27, 2001
A synergistic composition and method for inhibiting microbiological growth which comprises a combination of stabilized sodium hypobromite with a mixture of 5-chloro-2-methyl 4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.
6315909 Use of control matrix for cooling water systems control November 13, 2001
Described and claimed is a method of controlling a cooling water system in which control is based on information from a control Matrix applicable to the specific operating parameters of the cooling water system including:(i) providing a suitable fluorometer, sufficient analytical devices and
6315866 Method of increasing the dry strength of paper products using cationic dispersion polymers November 13, 2001
This invention is directed to method for improving the dry strength of a paper product using a single cationic dispersion polymer strength additive, wherein the cationic dispersion polymer is prepared by polymerizing in an aqueous solution of a polyvalent anionic salt in the presence
6313246 High molecular weight zwitterionic polymers November 6, 2001
This invention is directed to high molecular weight water-soluble zwitterionic polymers derived from zwitterionic and nonionic monomer units, and to the use of the polymers in papermaking processes.
6312644 Fluorescent monomers and polymers containing same for use in industrial water systems November 6, 2001
Fluorescent monomers of the formula ##STR1##wherein M is selected from the group consisting of hydrogen, sodium, potassium, cesium, rubidium, lithium and ammonium, andn is selected from the group consisting of 1, 2, 3, 4, 6 and 9;are provided which are useful in the production of pyranine-ta
6310104 Process for producing colloidal borosilicates October 30, 2001
The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the ad
6306308 Inorganic composition, process of preparation and method of use October 23, 2001
A coagulant which is the reaction product of a trivalent metal salt (eg., FeCl.sub.3), excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids an
6293973 Method of controlling oxalate precipitation in bayer process liquor September 25, 2001
A method is disclosed for controlling the precipitation of soluble sodium oxalate in Bayer process liquor which comprises adding a surface active quaternary ammonium compound to the Bayer process liquor and then subsequently adding a mixture of a hydrophobic oil and at least one surf
6287473 Stable oxidizing bromine formulations, method of manufacture and uses thereof for biofouling con September 11, 2001
Stable oxidizing bromine compounds are prepared by preparing a caustic solution comprising a halogen stabilizer, water and an alkali or alkaline earth metal hydroxide, the halogen stabilizer being selected from the group consisting of R--NH.sub.2, R--NH--R.sup.1, R--SO.sub.2 --NH.sub.2,
6280635 Autocycle control of cooling water systems August 28, 2001
An autocycle method to control a cooling water system comprising the steps of:a) adding a treatment product to said cooling water system, with said treatment product comprising inert tracer and tagged treatment polymer in a set proportion;b) providing a sufficient number of fluorometers,
6280631 Use of polymers containing vinylamine/vinylformamide for the treatment of food processing wastew August 28, 2001
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 v
6270722 Stabilized bromine solutions, method of manufacture and uses thereof for biofouling control August 7, 2001
Stabilized bromine solutions are prepared by combining a bromine source and a stabilizer to form a mixture, adding an oxidizer to the mixture, and then adding, an alkaline source to adjust the pH of the mixture to at least 13.
6270627 Use of colloidal borosilicates in the production of paper August 7, 2001
The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the ad

 
 
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