Patents Represented by Attorney, Agent or Law Firm Joseph B. Barrett
  • 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
  • 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
  • Patent number: 5338816
    Abstract: A hydrophobic polyelectrolyte copolymer which is useful in the removal of color in paper mill waste water. The copolymer preferably comprises diallyldimethylammonium chloride and a hydrophobic monomer selected from the group consisting of quaternized dimethylaminoethylacrylates and quaternized dimethylaminoethylmethacrylates.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: August 16, 1994
    Assignee: Nalco Chemical Company
    Inventors: Manian Ramesh, John W. Sparapany, Martha R. Finck, Kristine S. Siefert, Chandrashekar S. Shetty
  • Patent number: 5336729
    Abstract: An acrylamide co-polymer which contains from between 1-60 mole percent of (2-acrylamido-2-hydroxy ethyl) trialkyl ammonium salt groups. These co-polymers are made by reacting (formylmethyl) trialykl ammonium salts at a pH of at least 9 and a temperature of between 15-80 degrees centigrade.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: August 9, 1994
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, Frederick J. Swiecinski
  • Patent number: 5334569
    Abstract: Alkylation catalyst of the type used in the refining of petroleum can be improved by using a promoter composition which contains an alkyl phosphate ester amine salt and pinene.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: August 2, 1994
    Assignee: Nalco Chemical Company
    Inventor: John C. Kisalus
  • Patent number: 5332507
    Abstract: The invention provides a method of recycling waste oil fluids including dispersed solids and emulsified water. According to the method, the waste oil is treated with an effective amount of a dispersion of a water-soluble cationic polymer.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: July 26, 1994
    Assignee: Nalco Chemical Company
    Inventors: Michael L. Braden, Wayne M. Carlson, Manian Ramesh, Ananthasubramanian Sivakumar
  • Patent number: 5332506
    Abstract: The invention provides a method of recovering water from an acid workover, the water including dispersed solids and emulsified oil. According to the method, the water is treated with an effective amount of a dispersion of a water-soluble cationic polymer.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: July 26, 1994
    Assignee: Nalco Chemical Company
    Inventors: Robert A. Marble, Timothy L. Sweeney
  • Patent number: 5330546
    Abstract: A method for concentrating coal tailings which comprises steps of: feeding the coal tailings to a thickener; treating the coal tailings with a hydrophobic polyelectrolyte copolymer coagulant which comprises diallyldimethylammonium chloride and a more hydrophobic monomer, the coagulant is added to the coal tailings in an amount between about 0.05 to about 0.25 lb/ton; treating the coal tailings with a flocculant in an amount between about 0.05 to about 0.25 lb/ton; discharging substantially concentrated tailing; and withdrawing substantially clarified liquid from the thickener.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: July 19, 1994
    Assignee: Nalco Chemical Company
    Inventors: Manian Ramesh, Ram A. Venkatadri, Lawerence J. Connelly, Jeffrey R. Cramm
  • Patent number: 5330683
    Abstract: An environmentally acceptable and economically appealing method of inhibiting corrosion in brine solution systems wherein an aqueous brine solution is treated with gluconate or sorbitol.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: July 19, 1994
    Assignee: Nalco Chemical Company
    Inventor: Barry W. Sufrin
  • Patent number: 5330650
    Abstract: One aspect of the invention provides a method of removing emulsified oil from oil field produced water. According to the method, the oil-containing water is treated with an effective amount of a dispersion of a water-soluble cationic polymer.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: July 19, 1994
    Assignee: Nalco Chemical Company
    Inventors: Norman E. Byrne, Robert A. Marble, Manian Ramesh
  • Patent number: 5328599
    Abstract: A wastewater treatment system and method for chemical precipitation and removal of metals from wastewater in a continuous or batch treatment process includes an ion-selective sulfide electrode and a reference electrode disposed in a precipitation tank for measuring an electrochemical potential therebetween in a predetermined range. A controller unit is provided which is responsive to the electrochemical potential in the predetermined range and is connected to a precipitant feed unit for automatically controlling the chemical precipitant fed into the precipitation tank.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: July 12, 1994
    Assignee: Nalco Chemical Company
    Inventors: Kristine S. Siefert, Pek L. Choo, Wayne M. Carlson
  • Patent number: 5326924
    Abstract: Alkylation processes of the type used in the refining of petroleum can be improved by using a promoter composition which contains an alkyl phosphate ester amine salt and pinene.
    Type: Grant
    Filed: August 19, 1987
    Date of Patent: July 5, 1994
    Assignee: Nalco Chamical Company
    Inventor: John C. Kisalus
  • Patent number: 5326479
    Abstract: A process for removing color from a pulp and paper wastewater which comprises the following steps: (a) treating the wastewater with a reducing agent which is capable of inactivating color producing functional groups of the wastewater; and (b) treating the wastewater subsequent to step (a) with a polymer which is capable of removing color from the wastewater.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: July 5, 1994
    Assignee: Nalco Chemical Company
    Inventors: Jawed M. Sarkar, Amy M. Tseng, John H. Collins
  • Patent number: 5326482
    Abstract: A method and apparatus for automatically measuring the acidity of overhead water in an oil refinery, and dispensing a neutralizing agent into the refinery system at a rate responsive to that measurement. A sample of overhead water is collected and passed through a filter and cation exchange resin. The acid concentration of the sample is then automatically measured and a signal generated based on the concentration. The signal goes to a controller which controls the dispensation rate of neutralizing agent into the refinery system, thus reducing the acidity of the overhead water and limiting the corrosive effects of such acidity.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: July 5, 1994
    Assignee: Nalco Chemical Company
    Inventors: Ronald B. Lessard, Paul Fearnside
  • Patent number: 5324393
    Abstract: A method for preventing fouling of ethylene dichloride distillation units which comprises treating the feed to such unit with a fouling preventing amount of a composition comprising (a) 2-15 weight % of an oil soluble polyacrylate ester or methacrylate ester with alcohol radical of the ester group containing from C.sub.4 -C.sub.22 carbon atoms which contains between 0.1-25 mole % of amino alcohol ester groups; (b) 20-40 weight % a phenylene diamine compound having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are the same or different and are hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.1 -C.sub.20 aryl, C.sub.1 -C.sub.20 alkaryl or C.sub.1 -C.sub.20 aralkyl, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is hydrogen; and (c) the balance is a heavy aromatic solvent.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: June 28, 1994
    Assignee: Nalco Chemical Company
    Inventor: Michael K. Poindexter
  • Patent number: 5322640
    Abstract: This invention is a method for inhibiting corrosion in metallic flow lines containing hydrocarbon and/or aqueous fluids comprising adding to the fluid contained in the flow line a corrosion inhibiting amount of a water-soluble ampholytic substituted imidazoline having the formula: ##STR1## wherein R1 comprises a radical selected from the group consisting of hydrogen, alkyl, and aryl groups having 6 to 30 carbons; R2 comprises a radical selected from the group consisting of polyalkylene polyamines having from 2 to 16 carbon atoms, NH.sub.2, N(R.sub.4).sub.2, OH and SH; R.sub.3 is a radical selected from the group consisting of carboxylate, carbonate, sulfite, sulfate, phosphite, and phosphate; n is a number from 1 to 10; and, R4 comprises a branched or linear alkyl chain having a length of 1 to 8.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: June 21, 1994
    Assignee: Nalco Chemical Company
    Inventors: Norman E. Byrne, John D. Johnson
  • Patent number: 5320779
    Abstract: A corrosion inhibitor treatment composition for cooling water systems is disclosed in which no chromate is used and no free orthophosphate is present comprising a combination of a localized corrosion inhibitor in the form of a salt of molybdenum, vanadium, or tungsten, a general corrosion and scale inhibitor comprising zinc or nickel, a pair of organic phosphonates, and a stabilizing agent.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: June 14, 1994
    Assignee: Nalco Chemical Company
    Inventor: Kenneth P. Fivizzani
  • Patent number: 5320967
    Abstract: Leakage of water from a boiler water system wherein steam is generated in a boiler from feedwater fed to the boiler, and the concentration of impurities in the boiler water within the boiler is reduced by withdrawing fractions thereof as blowdown while admitting additional feedwater as boiler-water makeup, is determined. The boiler has a concentration cycle value, the concentration cycle value being the average value of the concentration of an inert component in the blowdown at steady state (C.sub.F) divided by the concentration of the inert component in the feedwater (C.sub.I). The concentration of the inert component in the boiler at steady state varies from a high concentration C.sub.H, having a value that is higher than C.sub.F, to a low concentration C.sub.L, having a value between the (C.sub.I) and the (C.sub.F), within a time period.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: June 14, 1994
    Assignee: Nalco Chemical Company
    Inventors: Stanley C. Avallone, Roger W. Fowee, James R. MacDonald, Nicholas J. Furibondo
  • Patent number: 5314626
    Abstract: Siliceous materials produced by thermally treating Bayer process liquors are obtained in modified form when produced in the presence of ammonium, aromatic amine, and amine compounds, or compounds bearing ammonium, aromatic amine or amine moieties, such as N-propylamine, pyridine and tetramethylammonium hydroxide. These modified siliceous materials possess morphologies which confer upon them a reduced tendency to deposit on surfaces throughout the process.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: May 24, 1994
    Assignee: Nalco Chemical Company
    Inventor: Peter A. Dimas
  • Patent number: 5311925
    Abstract: Magnesium hydroxide is added to aqueous sprays used in the cooling of steel produced by continuous casting to reduce the corrosion of ferrous metals in contact with these sprays. The magnesium hydroxide when added to aqueous sprays used in the cooling of steel produced by continuous casting further reduces the potential for calcium fluoride scale formation by reducing the fluoride content of the system water.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: May 17, 1994
    Assignee: Nalco Chemical Company
    Inventor: George B. Waltman