Patents Represented by Attorney Robert A. Miller

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  • Vinylamine copolymer flocculangts for use in coal refuse thickening
    Patent number: 5441649
    Abstract: The invention provides a method for dewatering coal tailing aqueous slurries. The method including the step of adding to the slurry a flocculant composition including 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 vinylformamide, vinyl acetate, vinyl pyrrolidinone, vinyl alcohol and the esters, amides and salts of acrylic acid and methacrylic acid.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: August 15, 1995
    Assignee: Nalco Chemical Company
    Inventors: Anthony G. Sommese, Krishnan J. Pillai
  • Settling stabilization of polymer containing particle dispersions in oil
    Patent number: 5438088
    Abstract: Hydrogenated castor oil stabilizes water-in-oil dispersions of water soluble vinyl addition polymers.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: August 1, 1995
    Assignee: Nalco Chemical Company
    Inventors: Anthony G. Sommese, R. Nagarajan
  • Monitoring water treatment agent in-system concentration and regulating dosage
    Patent number: 5435969
    Abstract: A concentration-fluctuation responsive regulation of water treatment agent feed is achieved by adding an incipient to a sample whereby a concentration indicator is formed. Such a concentration indicator comprises a combination of the incipient reagent and a substantially nonfluorescent water treatment agent. The concentration indicator is then monitored by fluorescence analysis of the sample to determine at least one fluorescence emission value that can be correlated to an in-system concentration of the water treatment agent. The fluorescence emission value measured in then correlated to the in-system concentration of the water treatment agent.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: July 25, 1995
    Assignee: Nalco Chemical Company
    Inventors: John E. Hoots, Martin R. Godfrey
  • Vinylamine polymers and coagulants for removing color from paper mill effluents
    Patent number: 5435921
    Abstract: The invention comprises a process for removing true and apparent color from pulp and paper waste waters. It comprises treating these waste waters with a coagulant and vinylamine polymer. The coagulant is selected from the group consisting of epichlorohydrin-dimethylamine, guanidine-formaldehyde condensation polymers, cyanoguanidine-formaldehyde condensation polymers, urea-formaldehyde condensation polymers, polyethyleneimines, polydiallyldimethylammonium chloride, copolymers of polydiallyldimethylammonium chloride and acrylamide, and ethylenedichloride-ammonia. The vinylamine polymer includes 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 methacrylic acid.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: July 25, 1995
    Assignee: Nalco Chemical Company
    Inventors: John H. Collins, Dodd W. Fong, Anthony G. Sommese, Amy M. Tseng
  • Method for clarifying wastewater containing surfactants
    Patent number: 5433863
    Abstract: A method and apparatus for recovering oil and clarifying waste water from an oil field are disclosed. The method includes the step of treating the waste water with an aqueous de-emulsifying agent comprising wattle tannin, an inorganic coagulant and a synthetic polymer flocculant to destabilize the oil emulsion and rapidly agglomerate the oil particles formed thereby. Efficiency of the present de-emulsifying agent permits use of flotation equipment for rapid clean-up of the waste water and obviates the need for large settling pits.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: July 18, 1995
    Assignee: Nalco Chemical Company
    Inventors: Michael L. Braden, Robert A. Marble
  • Polymers for treatment of food processing wastes
    Patent number: 5429749
    Abstract: 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.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: July 4, 1995
    Assignee: Nalco Chemical Company
    Inventors: Daniel K. Chung, Manian Ramesh, Chandrashekar S. Shetty
  • .alpha.-olefin/maleic anhydride copolymers as antifoulants in quench water systems
    Patent number: 5427690
    Abstract: A method for dispersing heavy hydrocarbons in an ethylene water quench tower, the method comprising the steps of: introducing an effective amount of a dispersant into the ethylene water quench tower, the dispersant comprising a copolymer of an .alpha.-olefin having from about 10 to about 36 carbon atoms and a maleic anhydride, wherein the rate ratio of the .alpha.-olefin to the maleic anhydride is from about 1:1 to about 5:5 and the molecular weight of the copolymer is from about 5,000 to about 100,000, the anhydride moieties of the copolymer being substantially intact.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: June 27, 1995
    Assignee: Nalco Chemical Company
    Inventors: Carl T. Rowe, Sherri L. Fisher
  • Polymers for removing humates from bayer process liquors
    Patent number: 5427750
    Abstract: Organic impurities are removed from Bayer process liquors using a polymer which contains vinylamine and/or vinylformamide.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: June 27, 1995
    Assignee: Nalco Chemical Company
    Inventors: Anthony G. Sommese, Robert P. Mahoney
  • Corrosion simulator and method for simulating corrosion activity of a process stream
    Patent number: 5425267
    Abstract: Apparatus for simulating corrosion activity of a process stream on equipment and transport lines. The apparatus includes a series of modular canisters coupled to a process stream source and a process stream discharge point. A cooling coil is positioned within each canister and the cooling coils are interconnected in series. The first cooling coil is coupled to a coolant source and the last cooling coil is connected to a coolant discharge. The process stream flows thorough the series of canisters and the coolant flows through the coils in counterflow to the process stream to cool and partially condense the process stream. Corrosion activity and temperature within the canister are monitored using corrosion probes and/or coupons. Modular construction of the canisters permits disassembly and reassembly to adapt the simulator to different simulation applications.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: June 20, 1995
    Assignee: Nalco Chemical Company
    Inventors: William B. Herrmann, Daniel Mull, John G. Hyatt, Paul Fearnside, Russell C. Strong
  • Cationic anionic polyelectrolytes for enhancing the freeness of paper pulp
    Patent number: 5423946
    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: March 7, 1994
    Date of Patent: June 13, 1995
    Assignee: Nalco Chemical Company
    Inventors: Jawed M. Sarkar, David R. Cosper
  • Polymerization of diallyldialkyl ammonium halide compounds with azo compound and inorganic salt
    Patent number: 5422408
    Abstract: The present invention provides a process for polymerizing diallyldialkyl ammonium compounds to produce polymers with increased molecular weight in which the polymerization is carried out in an aqueous medium containing an inorganic salt and a water soluble free radical initiator that does not react with the inorganic salt or the halide counterion of the diallyldialkyl ammonium halide compound to form a chain transfer or chain terminating agent.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: June 6, 1995
    Assignee: Nalco Chemical Company
    Inventors: Jeffrey R. Cramm, Fran K. Kravitz
  • Hindered amines for treating industrial water systems
    Patent number: 5419837
    Abstract: The present invention provides methods for treating industrial water systems. Pursuant to the method, the industrial water systems are treated with an effective amount of a hindered amine. In further embodiments, the hindered amine also acts as a steam tracer.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: May 30, 1995
    Assignee: Nalco Chemical Company
    Inventors: Martin R. Godfrey, David P. Workman
  • .alpha.olefin/maelic anhydride copolymers as antifoulants in ethylene process water stripper systems
    Patent number: 5420194
    Abstract: A method for dispersing heavy hydrocarbons in an ethylene process water stripper tower, the method comprising the steps of: introducing an effective amount of a dispersant into the ethylene water stripper, the dispersant comprising a copolymer of an .alpha.-olefin having from about 10 to about 36 carbon atoms and a maleic anhydride, wherein the rate ratio of the .alpha.-olefin to the maleic anhydride is from about 1:1 to about 5:5 and the molecular weight of the copolymer is from about 5,000 to about 100,000, the anhydride moieties of the copolymer being substantially intact.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: May 30, 1995
    Assignee: Nalco Chemical Company
    Inventors: Carl T. Rowe, Sherri L. Fisher
  • Chemical feed system
    Patent number: 5419836
    Abstract: A chemical feed system for use in industrial fluid systems is disclosed. The system comprises a fluid source, containers for storing additives, pumps for proportionally dispensing the additives, and a filter to remove unwanted matter from the fluid stream. The invention is partially applicable to poultry drinking water systems.
    Type: Grant
    Filed: December 20, 1993
    Date of Patent: May 30, 1995
    Assignee: Nalco Chemical Company
    Inventors: Edgar C. Ray, Randal J. Meyer
  • Set retarding additive for cement slurries
    Patent number: 5417759
    Abstract: N-phosphonomethyl iminodiacetic acid may be used as an additive to retard the setting time of Portland cement.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: May 23, 1995
    Assignee: Nalco Chemical Company
    Inventor: David A. Huddleston
  • Method for the alteration of siliceous materials from bayer process liquors
    Patent number: 5415782
    Abstract: Siliceous materials produced by thermally treating spent Bayer process liquors are obtained in modified form when produced in the presence of polymeric quaternary ammonium compounds, polyamine polymers, copolymers of acrylic acid and acrylamide, and polyacrylamides. These modified siliceous materials possess morphologies which confer upon them a reduced tendency to deposit on surfaces throughout the process.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: May 16, 1995
    Assignee: Nalco Chemical Company
    Inventor: Peter A. Dimas
  • Detackification agent for adhesives found in paper fiber furnishes
    Patent number: 5415739
    Abstract: Adhesive contaminants in secondary fiber paper pulps are detackified by the use of a water soluble terphthalate glycol terpolymer.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: May 16, 1995
    Assignee: Nalco Chemical Company
    Inventors: Gary S. Furman, Jr., James H. Smith, Jr.
  • Method for removing a cyanide contaminant from refinery waste water streams
    Patent number: 5415785
    Abstract: A method for reducing cyanide contaminants in refinery waste waters prior to reuse or release into the environment comprising adding to the waters a cyanide reactive scavenger comprising at least one amine-aldehyde reaction product.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: May 16, 1995
    Assignee: Nalco Chemical Company
    Inventors: Michael L. Braden, Veronica K. Braden, Manian Ramesh, Everett C. Phillips
  • Leak detection and responsive treatment in industrial water processes
    Patent number: 5416323
    Abstract: Leakage is detected between a process fluid and a temper fluid, or from a process fluid to a temperature-conditioning fluid, wherein one but not both of said A and said B fluids is an industrial process fluid and wherein at least one of said A and said B fluids is a gaseous stream, in an industrial process. The industrial process includes an A and a B fluid, and one of the A and B fluids receives heat from or transfer heat to the other of the A and the B fluids by an indirect contact method, and one but not both of the A and the B fluids is an industrial process fluid. In particular, the A fluid is a temperature-conditioning fluid that receives heat from a process fluid, for instance wherein the A fluid is the water of a waste-heat boiler and the B fluid is a gaseous process stream.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: May 16, 1995
    Assignee: Nalco Chemical Company
    Inventors: John E. Hoots, Luciano E. Savorgnan, Glenn J. St. Amant
  • Method for using ozone in cooling towers
    Patent number: 5415783
    Abstract: A method for increasing the effectiveness of ozone as a treating agent for alkaline cooling tower waters. This is accomplished by reducing pH of the solutions in contactor loops which supply ozone to cooling tower waters with an acidic substance.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: May 16, 1995
    Assignee: Nalco Chemical Company
    Inventors: Donald A. Johnson, Richard J. Strittmatter, Binaifer S. Khambatta