Patents Represented by Attorney Robert A. Miller

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  • Hydrazones as oxygen scavengers in boiler water systems
    Patent number: 5384050
    Abstract: A method of removing dissolved oxygen from boiler water having and alkaline pH is disclosed. The method uses at least one hydrazone compound of one of the following formulae: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from hydrogen, C.sub.1 -C.sub.16 alkyl, aryl, substituted alkyl or substituted aryl, and R.sup.5 and R.sup.6 are independently selected from hydrogen, C.sub.1 -C.sub.16 alkyl, aryl, substituted alkyl, or substituted aryl, ##STR2## Preferably, an oxidation-reduction catalyst such as Cu(II) is used as well. The hydrazones used in the present invention are highly shelf stable and do not suffer the toxicity of hydrazine.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: January 24, 1995
    Assignee: Nalco Chemical Company
    Inventors: Douglas G. Kelley, Deborah M. Rogers
  • Cross-linked poly(aminoamides) as yankee dryer adhesives
    Patent number: 5382323
    Abstract: Improved halogen-free Yankee Dryer adhesives based on cross linked cat ionic polyaminoamide polymers are described. The adhesives are obtained by crosslinking a backbone cationic polymer formed by reacting a difunctional carboxylic acid with a polyamine containing at least one secondary amine, said crosslinking achieved by the use of a multi-functional aidehyde. The preferred adhesive is that obtained by reacting adipic acid with diethylenetriamine, at essentially equimolar ratios of from about 1.2: 1.0 to about 1.0: 1.2, and then crosslinking with a dialdehyde selected from glutaraldehyde, glyoxal, or mixtures thereof. Improved adhesion and peel strength are obtained when using the new materials as compared to materials now commercially used.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: January 17, 1995
    Assignee: Nalco Chemical Company
    Inventors: Gary S. Furman, Jr., James F. Kneller, Kristy M. Bailey, Martha R. Finck, Winston Su
  • Method and apparatus for inline electrochemical monitoring and automated control of oxidizing or reducing agents in water systems
    Patent number: 5382331
    Abstract: Method and apparatus for electrochemical monitoring of oxidizing agents, such as nitrite, or reducing agents in a water system and for controlling concentration levels for protecting surfaces exposed to the water. The apparatus includes a probe for selective exposure to fresh water samples of the system. The probe is connected to an analyzer that operates the probe and measures agent concentration by a chronoamperometry technique. A controller selectively feeds an agent to the water system in accordance with a set point to maintain a desired concentration level.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: January 17, 1995
    Assignee: Nalco Chemical Company
    Inventor: Rodney H. Banks
  • Two dewatering of slurries controlled by video system
    Patent number: 5380440
    Abstract: A process for dewatering a slurry, which comprises introducing a dewatering aid into a slurry of solids in water to condition the slurry. The conditioned slurry is then passed into a filtration zone where water is filtered off from the solids. Images of the dewatered solids are recorded with a video camera and digitized. The recorded images are compared with digitized desired images representing desired moisture levels. The recorded images versus the desired images are converted into analogue signals which are indicative of the moisture content of the dewatered solids.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: January 10, 1995
    Assignee: Anikem Pty. Limited
    Inventor: Evan R. Chipps
  • Fluorescent monomer and polymer
    Patent number: 5378784
    Abstract: 3-Hydroxy-2-methylene-3-(1-naphthyl)propionic acid, methyl ester and fluorescent water soluble polymers prepared therefrom.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: January 3, 1995
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Corrosion inhibitor for nitrogen fertilizer solutions
    Patent number: 5376159
    Abstract: A trace amount of a molybdate is disclosed for inhibiting corrosion by concentrated urea-ammonium nitrate fertilizer solutions (UAN) in contact with ferrous metal piping and equipment surfaces. From 10 to 200 ppm of sodium molybdate are blended in a UAN solution containing 20-50 weight percent water for effectively inhibiting corrosion. The corrosion-inhibited UAN solution is non-sludging, non-foaming and essentially free of precipitates.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: December 27, 1994
    Assignee: Nalco Chemical Company
    Inventors: Raymond T. Cunningham, Kristen T. Moore
  • Class of polymeric adhesives for yankee dryer applications
    Patent number: 5374334
    Abstract: The invention provides a method for manufacturing tissue paper. According to the method, a yankee dryer adhesive composition is applied to a metal surface of a drying drum. The yankee dryer adhesive composition preferably includes from about 1 to about 100 mole percent vinylamine and from about 1 to about 99 of at least one monomer selected from the group consisting of vinylformamide, vinyl acetate and vinyl alcohol. The yankee dryer adhesive composition is contacted with a continuous paper web. The continuous paper web is then dried. The dry continuous paper web is creped with a metal blade to form tissue paper.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: December 20, 1994
    Assignee: Nalco Chemical Company
    Inventors: Anthony G. Sommese, Gary S. Furman, Jr.
  • Method and apparatus for dispersing or dissolving particles of a pelletized material in a liquid
    Patent number: 5374119
    Abstract: A method and an apparatus for dispersing or dissolving a pelletized material in a liquid, in which a pelletized material is placed on a platform in a container having a lower chamber portion, and a stream of liquid is introduced into that lower chamber to produce a vortex of the liquid which washes across the pelletized material, thereby causing it to become dispersed or dissolved into the liquid. In installations where the flow rate of the liquid is below a certain level, a supply of compressed air is injected into the liquid of the lower chamber to prevent mudding of the material.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: December 20, 1994
    Assignee: Nalco Chemical Company
    Inventor: David W. Scheimann
  • Synergistic product selection test for biocides
    Patent number: 5374536
    Abstract: The product selection test is developed for rapid determination of the presence of synergistic blends of the biocide or the presence of biocide blends in contaminated waters. The method uses a reduction oxidation dye system, supplied nutrients, admixtures of one or more biocides or blends thereof and incubation times and temperatures providing for a variation of color changes of the dye system. Industrial waters such as pulp and paper waters contaminated with microbes can be tested by this rapid method of determining the presence of synergistic blends of anti-microbial agents.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: December 20, 1994
    Assignee: Nalco Chemical Company
    Inventor: Linda R. Robertson
  • Synthetic hot mill lubricant for high temperature applications
    Patent number: 5372736
    Abstract: The present invention contemplates a hot mill lubricant composition capable of use in demanding hot steel rolling mill operations wherein the composition comprises a synthetic base carrier composition comprising a mixture of dimeric and polymeric esters formed between saturated and unsaturated fatty acids with up to 18 carbon atoms, and various alcohols and polyols, said composition having a molecular weight between 500 and 1000 daltons (da). In addition to providing superior lubrication compatible with mill operations at elevated temperatures, the composition of the present invention provides additional advantages such as superior breakout and plateout characteristics.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: December 13, 1994
    Assignee: Nalco Chemical Company
    Inventor: Robert L. Trivett
  • Synergistic activity of glutaraldehyde in the presence of oxidants
    Patent number: 5368749
    Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of aerobic microorganisms. The composition of the present invention includes sufficient amounts of an oxidant and glutaraldehyde. The method of the present invention includes the step of adding the oxidant and glutaraldehyde to industrial process waters.
    Type: Grant
    Filed: May 16, 1994
    Date of Patent: November 29, 1994
    Assignee: Nalco Chemical Company
    Inventor: Judy G. La Zonby
  • Spectrophotometric detection of hydroperoxides in hydrocarbons
    Patent number: 5362652
    Abstract: A method for the determination of organic hydroperoxides in a hydrocarbon which has been subjected to oxidative polymerization conditions is disclosed. The steps employed in the invention include mixing an organic cupric salt such as cupric acetate and a phenanthroline such as 2,9-dimethyl-1,10-phenanthroline with a sample of the hydrocarbon in an organic solvent such as acetonitrile, measuring the color change after a fixed period of time for cuprous complex formation, and comparing the measurement to the color change of a standard reference to determine the relative quantity of organic hydroperoxide in the sample.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: November 8, 1994
    Assignee: Nalco Chemical Company
    Inventor: Robert D. McClain
  • Phosphoric triamide coking inhibitors
    Patent number: 5360531
    Abstract: Inhibiting coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions. The heat transfer surfaces are treated with an effective amount of tripiperidinophosphine oxide to inhibit coke formation on the heat transfer surfaces. The tripiperidinophosphine oxide is essentially free from contributing to corrosion and from producing catalyst-impairing by-products.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: November 1, 1994
    Assignee: Nalco Chemical Company
    Inventors: Youdong Tong, Michael K. Poindexter
  • Polymeric binders for ceramic processing
    Patent number: 5358911
    Abstract: A composition suitable for use as a binder of ceramic materials and a method for preparing a ceramic material which provides relatively greater green ceramic strength is disclosed. The improved binder contains a substantially hydrolyzed copolymer made from monomers having ester or amide functional groups, poly(vinyl amine), poly(vinyl formamide) or a copolymer of vinyl alcohol and vinyl amine. The binder is combined with an aqueous solution containing a ceramic powder to make a slurry, and the slurry is subsequently spray dried, pressed and heated to make a ceramic.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: October 25, 1994
    Assignee: Nalco Chemical Company
    Inventors: Kevin J. Moeggenborg, Peter E. Reed
  • Method for inhibiting scale formation and/or dispersing iron in reverse osmosis systems
    Patent number: 5358640
    Abstract: A method for inhibiting calcium sulfate scale formation and deposition and/or dispersing iron from a feedstream passing through a reverse osmosis system which comprises the steps of: controlling the pH of the feedstream within the range between about 6.0 to about 7.0; controlling the temperature of the feedstream within the range between about 50.degree. to about 80.degree. F.; and adding a scale inhibitor and/or iron dispersant to the feedstream in an amount between about 0.002 ppm per ppm hardness (as CaCO.sub.3) of the feedstream to about 0.005 ppm per ppm hardness (as CaCO.sub.3) of the feedstream, the scale inhibitor comprising a water-soluble organic phosphonate, an N-substituted acrylamide polymer, caustic and water.
    Type: Grant
    Filed: September 16, 1993
    Date of Patent: October 25, 1994
    Assignee: Nalco Chemical Company
    Inventors: E. H. Kelle Zeiher, Cynthia A. Soderquist
  • Phosphorothioate coking inhibitors
    Patent number: 5354450
    Abstract: Inhibiting coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions. The heat transfer surfaces are treated with an effective amount of S,S,S-trihydrocarbyl phosphorotrithioate to inhibit coke formation on the heat transfer surfaces. The phosphorotrithioate is essentially free from contributing to corrosion and from producing catalyst-impairing by-products.
    Type: Grant
    Filed: April 7, 1993
    Date of Patent: October 11, 1994
    Assignee: Nalco Chemical Company
    Inventors: Youdong Tong, Michael K. Poindexter
  • Polymers for flocculating red mud from bayer process liquors
    Patent number: 5346628
    Abstract: Red mud is flocculated from Bayer process liquors using a polymer which contains vinylamine and/or vinylformamide.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: September 13, 1994
    Assignee: Nalco Chemical Company
    Inventors: Anthony G. Sommese, Robert P. Mahoney
  • Antifoam/defoamer compositions for Bayer process
    Patent number: 5346511
    Abstract: A method for defoaming a Bayer process liquor, the method comprising the steps of adding to the Bayer process liquor an effective amount of an antifoam/defoamer composition comprising a polyether surfactant and a polyhydric alcohol fatty acid ester.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: September 13, 1994
    Assignee: Nalco Chemical Company
    Inventor: Peter A. Dimas
  • Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewater
    Patent number: 5342538
    Abstract: 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.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: August 30, 1994
    Assignee: Nalco Canada, Inc.
    Inventors: Daniel K. Chung, Steven B. Warrick
  • Clay stabilizer
    Patent number: 5342530
    Abstract: A composition suitable as an additive in down-hole fluid for inhibiting clay swelling in a down-hole formation is comprised of an aqueous solution of a quaternary amine-based cationic polyelectrolyte and salt(s). The cation of the salt(s) may be a divalent salt cation, a choline cation, are certain N-substituted quaternary ammonium salt cations. The salt(s) anion may be a monovalent inorganic anion or an anion derived from an organic acid having from 2 to 6 carbons.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: August 30, 1994
    Assignee: Nalco Chemical Company
    Inventors: Carl W. Aften, Robert K. Gabel