Patents Represented by Attorney Robert A. Miller
  • Patent number: 5525201
    Abstract: Certain base catalyzed oxyalkylated-cardanol-alkylphenol-aldehyde resins may be utilized in refinery demulsification operations. These materials find particular utility in breaking water-in-oil emulsions resulting from the water wash of crude oils. The materials may also be employed to break other water-in-oil refinery emulsions.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: June 11, 1996
    Assignee: Nalco Chemical Company
    Inventors: Hernando Diaz-Arauzo, Paul M. Lindemuth, Bryan T. O'Reilly
  • Patent number: 5525665
    Abstract: A composition suitable for use as a binder of ceramic materials is disclosed. The improved binder contains substantially hydrolyzed copolymer made from monomers having ester or amide functional groups, poly(vinyl formamide) or a copolymer of vinyl alcohol and vinyl amine.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: June 11, 1996
    Assignee: Nalco Chemical Company
    Inventors: Kevin J. Moeggenborg, Peter E. Reed
  • Patent number: 5518634
    Abstract: A chemically assisted process for dewatering mining waste solids on mechanical separation devices with at least one flocculant and at least one coagulant. It comprises using as the coagulant a diallyldimethyl ammonium chloride copolymer which contains from 3-25 mole % of acrylamide and which has been cross linked with from 0.01 to 0.5 mole % of triallyl amine.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: May 21, 1996
    Assignee: Nalco Chemical Company
    Inventors: Krishnan J. Pillai, E. Michael Kerr
  • Patent number: 5512181
    Abstract: The-silica content of cooling water blow-down waters is reduced by contacting these waters with a colloidal alumina which adsorbs a portion of the silica. The blow-down is then dialyzed to produce a permeate having a reduced silica content. In a preferred embodiment of the invention the permeate is recycled.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: April 30, 1996
    Assignee: Nalco Chemical Company
    Inventor: Stephen A. Matchett
  • Patent number: 5510040
    Abstract: Selenium compounds present in aqueous liquids can be removed using a poly dithiocarbamate materials. The selenium compounds are then removed by precipitation or sedimentation. Optionally, an oxidizing agent may be added to the system prior to the addition of the poly dithiocarbamate. Various filtration methods may be employed to remove the selenium-dithiocarbamate materials from aqueous liquids.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: April 23, 1996
    Assignee: Nalco Chemical Company
    Inventors: Thomas M. Miller, Walter H. Goodman
  • Patent number: 5510439
    Abstract: 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.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: April 23, 1996
    Assignee: Nalco Chemical Company
    Inventors: Chandrashekar S. Shetty, Manian Ramesh
  • Patent number: 5510038
    Abstract: In drainage systems in buildings and excavations there is waste and ground water with a high dissolved material content. These mainly inorganic substances often cause the build-up of hard deposits in the water conveying parts of the drainage systems, e.g. waste water pipes. These deposits reduce the drainage cross section of the drainage systems thus preventing the water from flowing freely and thus causing back-ups which can result in considerable damage. The current processes of removing these deposits are electro-mechanical cleaning and high-pressure rinsing or abrading with water. These processes are laborious, expensive and cause interruptions in operation. It is the aim of the invention to prevent the formation of such deposits. To this end, a conditioning agent in aqueous form is added via a metering installation at one or more points in the drainage system.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: April 23, 1996
    Inventor: Marcel C. Wegmuller
  • Patent number: 5507914
    Abstract: A process for enhancing the freeness of paper pulp, which comprises the steps of adding to the pulp from about 0.5 to about 2.5 kilograms per ton based on the dry weight of the pulp, of a cellulolytic enzyme at the vertical tank of the papermaking process, allowing the pulp to contact the cellulolytic enzyme for from about 30 minutes to about 60 minutes, adding at least 0.011%, based on the dry weight of the pulp, of a water soluble cationic polymer, adding at least 0.007%, based on the dry weight of the pulp, of a water soluble anionic polymer and forming the thus treated pulp into paper.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 16, 1996
    Assignee: Nalco Chemical Company
    Inventors: Jawed M. Sarkar, Hanuman P. Didwania
  • Patent number: 5503775
    Abstract: The invention provides a method of preventing the corrosion of yellow metal surfaces in contact with water. The method comprising the step of adding to the water an environmentally safe mixed tolyltriazole composition including at least 65% of the 5-methylbenzotriazole isomer by weight.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: April 2, 1996
    Assignee: Nalco Chemical Company
    Inventors: Narasimha M. Rao, Frank F. Lu, Donald A. Johnson, Nhuan P. Nghiem
  • Patent number: 5503006
    Abstract: An apparatus of provided for simulating corrosion activity of a high temperature liquid stream. The apparatus includes a canister in which is positioned a plug, occupying part of the internal volume of the canister. A stream of high temperature liquid enters the canister through an inlet, flows around the plug, and exits the canister through an outlet. The volume and configuration of the plug may be varied to simulate corrosion activity under various flow regimes. Probes may be placed in the liquid stream to detect corrosion activity and temperature. Several canisters may be arranged in series, and corrosion activity may be simulated in each canister simultaneously to determine effects of various parameters such as liquid impingement, velocity, and temperature on corrosion activity.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: April 2, 1996
    Assignee: Nalco Chemical Company
    Inventors: Elizabeth Babaian-Kibala, Joe S. Walker, John G. Hyatt, Sam Ferguson
  • Patent number: 5501770
    Abstract: A process for improving the freeness of paper pulp, which comprises the steps of adding to the pulp at least 0.05%, based on the dry weight of the pulp, of a cellulolytic enzyme, allowing the pulp to contact the cellulolytic enzyme for from about 40 minutes to about 60 minutes at a temperature of at least 40.degree. C., adding at least 0.011%, based on the dry weight of the pulp, of a water soluble cationic polymer, adding at least 0.007%, based on the dry weight of the pulp, of a water soluble anionic or nonionic polymer and forming the thus treated pulp into paper.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: March 26, 1996
    Assignee: Nalco Chemical Company
    Inventors: Jawed M. Sarkar, Hanuman P. Didwania
  • Patent number: 5498813
    Abstract: Alkyl alcohols are added to the effluent from hydrocarbon reactions using phosphoric acid based catalysts to prevent corrosion in metallic pipes and vessels downstream of the reactor. The alcohol is believed to react with phosphoric acid present in the hydrocarbon stream to produce a mixture of phosphate esters which act as corrosion filmers to prevent corrosion. The high boiling points of the phosphate esters allow for the separation of useful product from the phosphate ester corrosion inhibitors.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: March 12, 1996
    Assignee: Nalco Chemical Company
    Inventor: Theodore C. Arnst
  • Patent number: 5494582
    Abstract: Selenium compounds present in aqueous liquids containing sulfate and or chloride anions can be effectively removed by passing the liquid through a thiouronium modified anion ion exchange resin.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: February 27, 1996
    Assignee: Nalco Chemical Company
    Inventor: Walter H. Goodman
  • Patent number: 5494607
    Abstract: Asphaltenes may be dispersed in caustic treated petroleum crude oil, or in any fraction thereof by adding an effective dispersing amount of a mono or di substituted alkylphenol-formaldehyde resin and or a monosubstituted alkylphenol-polyethylenepolyamine-formaldehyde resin, such resins having a weight average molecular weight of from about 1,000 to about 20,000, and an alkyl substituent containing from about 4 to about 24 carbon atoms, which alkyl substituent may be linear or branched.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: February 27, 1996
    Assignee: Nalco Chemical Company
    Inventors: Maria B. Manek, Kailash N. Sawhney
  • Patent number: 5494588
    Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of microorganisms. The composition of the present invention includes sufficient amounts of a peracetic acid and a second organic biocide. The method of the present invention includes the step of adding sufficient amounts of the peracetic acid and the organic biocide to industrial process waters.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: February 27, 1996
    Assignee: Nalco Chemical Company
    Inventor: Judy G. LaZonby
  • Patent number: 5490904
    Abstract: There is provided a strength resin polymer for papermaking that has pendant alpha-hydroxy acetal substituents to (N-alkyl)(C.sub.1-2 alkyl)acrylamide mer units. There also is provided a process for preparation of such resin polymer by adduction of a pre-existing polymer, or the monomer precursors thereto, with an acetal-aldehyde reactant under alkaline conditions. There is provided such strength resin polymer in the form of a fluid liquid system, for instance a fluid solution or a fluid oil-continuous water-in-oil emulsion, particularly when such a system has a high concentration of resin polymer. There is provided activated polymer versions of certain of such resin polymers and paper compositions containing such activated polymer. There is also provided papermaking processes including the step of activating such resin polymer.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: February 13, 1996
    Assignee: Nalco Chemical Company
    Inventors: Roger H. Jansma, A. James Begala, Gary S. Furman
  • Patent number: 5487855
    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 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: September 16, 1994
    Date of Patent: January 30, 1996
    Assignee: Nalco Chemical Company
    Inventors: Kevin J. Moeggenborg, Peter E. Reed
  • Patent number: 5486295
    Abstract: Industrial waters treated with water soluble polymers can be satisfactorily recycled into systems containing hardness causing cations by treating the water containing the polymer with a water soluble persulfate salt. Treated waters may be added, for example, into a recirculating cooling water system, saving makeup water, and decreasing the load placed on industrial plant waste water systems.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: January 23, 1996
    Assignee: Nalco Chemical Company
    Inventor: Paul R. Young
  • Patent number: 5484834
    Abstract: 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.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: January 16, 1996
    Assignee: Nalco Canada Inc.
    Inventor: Daniel K. Chung
  • Patent number: 5478477
    Abstract: Alginic acid is used in combination with high molecular weight synthetic water soluble polymers to flocculate red mud from Bayer process liquors. Superior clarity of supernatant liquor is achieved using the process of the invention.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: December 26, 1995
    Assignee: Nalco Chemical Company
    Inventors: Manian Ramesh, John D. Kildea, Robert P. Mahoney