Patents Represented by Attorney Robert A. Miller
  • Patent number: 5641396
    Abstract: 2-amino-1-methoxypropane is used as a neutralizing amine in crude oil distillation units. The amine of the invention gives superior neutralization at the first initial condensate compared to other commonly used neutralizing amines.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: June 24, 1997
    Assignee: Nalco/Exxon Energy Chemicals L. P.
    Inventors: Veronica K. Braden, Tannon S. Woodson
  • Patent number: 5641394
    Abstract: The invention is a composition for use in deactivating iron species in hydrocarbon fluids, comprising the products resulting from the reaction of (I), with (II) and (III) is disclosed; wherein (I) is a substituted catechol of the structure ##STR1## where R is chosen from alkyl, aryl, alkaryl, or arylalkyl from about 1 to 20 carbon atoms; wherein (II) is a mixture of polyamines having the repeat structure ##STR2## wherein m ranges from 1 to 10 and where X is an alkyl, branched alkyl, cyclic or branched cyclic alkyl of from 1 to 10 carbon atoms, and where Y is a substituted alkylphenol of structure ##STR3## where R" is chosen from alkyl, aryl, alkaryl, arylalkyl of from about 1 to 22 carbon atoms; wherein (III) is an aldehyde of structure ##STR4## where R' is chosen from hydrogen, and an alkyl of from 1 to 6 carbon atoms. Also disclosed is the function of the said same composition, resulting from the reaction of (I) with (II) and (III), as an antioxidant in hydrocarbon fluids.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: June 24, 1997
    Assignee: Nalco/Exxon Energy Chemicals, L.P.
    Inventors: Sherri L. Fisher, Joseph P. Street
  • Patent number: 5637587
    Abstract: This invention provides a surprisingly efficacious combination useful for inhibiting microorganism growth, particularly in aqueous slurries containing mineral ore. In particular embodiments, the invention provides an antimicrobial composition comprising 1-(3-chloroallyl)-3,5,7 triaza-1-azoniaadamantane chloride and 2-bromo-2-nitropropane-1,3-diol. The invention also provides a method for inhibiting microbial growth in an aqueus mineral or ore slurry, e.g. a kaolin slurry. The method includes the step of adding to the slurry a microbiocidal composition of 1-(3-chloroallyl)-3,5,7 triaza-1-azoniaadamantane chloride and 2-bromo-2-nitropropane-1,3-diol.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: June 10, 1997
    Assignee: Nalco Chemical Company
    Inventors: Anthony E. Gross, Nancy L. Casselman
  • Patent number: 5635112
    Abstract: A method for breaking an oil-in-water emulsion which comprises the addition of a hydrophobically-modified polyelectrolyte copolymer comprising a diallyldimethylammonium chloride and a hydrophobically-associating monomer selected from the group consisting of quaternized dialkylaminoalkylacrylates, quaternized dialkylaminoalkylmethacrylates, and alkyl esters of (meth)acrylic acids, preferably ethylhexylacrylate, to the emulsion.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: June 3, 1997
    Assignee: Nalco Chemical Company
    Inventors: Manian Ramesh, Ananthasubramanian Sivakumar
  • Patent number: 5630964
    Abstract: The invention comprises a method of inhibiting naphthenic acid corrosion in a high temperature hydrocarbon system, comprising adding to the system a corrosion-inhibiting amount of a phosphate ester and a corrosion-inhibiting amount of organic polysulfide.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: May 20, 1997
    Assignee: Nalco/Exxon Energy Chemicals, L.P.
    Inventors: Elizabeth Babaian-Kibala, John G. Hyatt, Theodore J. Rose
  • Patent number: 5629368
    Abstract: A process for preparing a liquid slurry of bentonite which comprises the steps of charging a reactor vessel with between about 25 to about 75% of water by weight. The water is heated to a temperature range between about 50.degree. C. to about 95.degree. C. The reactor vessel is charged with between about 0, 1 and about 10% of sodium salt of silicic acid by weight and with between about 15 to about 35% of bentonite by weight. The reactor vessel is also charged with between about 10 to about 30% of a polyacrylate by weight.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: May 13, 1997
    Assignee: Nalco Canada, Inc.
    Inventor: Daniel K. Chung
  • Patent number: 5624575
    Abstract: The present invention relates generally to controlling the growth of microorganisms, including the inhibition of the growth of filamentous microorganisms in industrial process waters. The invention is directed to a method for preventing and removing the formation of deposits by microorganisms in the wet end of a paper machine with a combination of peracetic acid and an ethylene oxide/propylene oxide copolymer.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: April 29, 1997
    Assignee: Nalco Chemical Company
    Inventors: Robert J. Meade, Linda R. Robertson, Nicole R. Taylor, Judy G. LaZonby
  • Patent number: 5624569
    Abstract: The invention is a method for clarifying ink-containing effluent water from recycled paper production which comprises the step of adding a water-soluble, surface active, silicon-containing polyelectrolyte polymer coagulant to the ink-containing effluent water from recycled paper production, wherein the polymer has from 0.01 to 10 mole percent of a vinyl alkoxysilane monomer. A preferred silicon-containing polyelectrolyte polymer is the product of a free radical synthesis from vinyltrimethoxysilane and diallyldimethylammoniumchloride monomers.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: April 29, 1997
    Assignee: NALCO Chemical Company
    Inventors: Daniel K. Chung, Manian Ramesh, Karen R. Tubergen
  • Patent number: 5622533
    Abstract: The invention provides a method for dewatering coal tailing aqueous slurries in a twin belt press process. The method including the step of adding to the slurry a coagulant composition including a vinylamine copolymer including from about 1 to about 99 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 alcohol, vinyl acetate, vinyl pyrrolidinone and the esters, amides and salts of acrylic acid and methacrylic acid.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: April 22, 1997
    Assignee: Nalco Chemical Company
    Inventors: Anthony G. Sommese, Krishnan J. Pillai
  • Patent number: 5622647
    Abstract: A method for dewatering coal tailings, clean coal products and mineral slurries, as well as for the clarification of water contained in coal refuse slurries, employing a copolymer of diallyldimethlylammonium halide and a vinyl alkoxysilane, which is preferably a copolymer of diallyldimethylammonium chloride and vinyltrimethoxysilane as a coagulant is disclosed.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: April 22, 1997
    Assignee: Nalco Chemical Company
    Inventors: E. Michael Kerr, Manian Ramesh
  • Patent number: 5620629
    Abstract: This invention relates to a composition of matter of a silica sol/water soluble cationic polymer mixture. The colloidal silica may also be conditioned by passing over a cationic exchange resin prior to addition of cationic polymer.
    Type: Grant
    Filed: November 26, 1995
    Date of Patent: April 15, 1997
    Assignee: Nalco Chemical Company
    Inventors: Kristine S. Salmen, Pek L. Choo, David A. Picco, Michio Kobayashi
  • Patent number: 5610068
    Abstract: A method for determining the adequacy of corrosion prevention treatments applied to metal surfaces is disclosed. The method provides a qualitative determination of corrosion detection using inexpensive equipment. Generally, the method encompasses wetting at least a first and a second absorbent patches capable of retaining a liquid corrosive to metal surfaces to be tested with the corrosive liquid to obtain wetted patches and then contacting a portion of a first metal surface to be tested with the first patch under corrosive conditions and contacting a portion of a second metal surface to be tested with the second patch, wherein the second metal surface having the same composition as the first metal surface has been treated with an effective amount of a corrosion prevention treatment and subjecting the second patch in contact with the second metal surface to the same corrosive conditions as the corrosive conditions applied to the first patch in contact with the first metal surface.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: March 11, 1997
    Assignee: Nalco Chemical Company
    Inventors: Christine M. Stuart, Deborah M. Rogers, James R. Van Camp, Michael P. Sowinski
  • Patent number: 5605970
    Abstract: A process for synthesizing high molecular weight anionic dispersion polymer is disclosed, the process comprising providing a mixture of water, acrylic acid and a stabilizer; cooling the mixture to a temperature of less than 35.degree. C.; lowering the pH of the mixture to less than 4.5; adding ethylhexyl acrylate to the mixture to form an aqueous solution; stirring the aqueous solution; purging the solution with nitrogen simultaneous with the step of stirring; heating the solution to about 48.degree. C.; adding initiator for from about 2 to about 3 hours; heating the solution to about 75.degree. C. for about 30 to about 60 minutes; and cooling and collecting the polymer.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: February 25, 1997
    Assignee: Nalco Chemical Company
    Inventor: Radhakrishnan Selvarajan
  • Patent number: 5605606
    Abstract: A method for the prevention of fouling in a distillation train of a hydrocarbon processing unit. The method involves the precipitation of foulants contained in the hydrocarbon fluid prior to distillation. Precipitation of fouling components occurs when the liquid to be distilled is contacted with a high boiling fluid which is a non-solvent for the foulant causing species but is a solvent for the liquid that is to be distilled.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: February 25, 1997
    Assignee: Nalco/Exxon Energy Chemicals. L.P.
    Inventor: Allen R. Syrinek
  • Patent number: 5603841
    Abstract: The invention is a method for dewatering waste solids generated in mineral processing operations utilizing a hydrophobically-modified copolymer coagulant of diallyldimethyl ammonium chloride and quaternized dimethylaminoethyl acrylate or quaternized dimethylaminoethyl methacrylate.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: February 18, 1997
    Assignee: Nalco Chemical Company
    Inventor: E. Michael Kerr
  • Patent number: 5603840
    Abstract: The invention comprises adding bromide to a cooling water system containing corrosion and scale control treatment chemicals at elevated concentrations (40 ppm or greater). A fraction of the recirculating water is drawn off in a side stream and ozonated. Ozone oxidizes bromide to bromine which then serves as a biocide. The bromide levels are chosen such that the ozone/bromide reaction is preferred over the ozone/treatment chemicals reaction. Thus, the addition of bromide at elevated concentrations, while acting as a biocide precursor, serves to protect treatment chemicals necessary for corrosion and scale control.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: February 18, 1997
    Assignee: Nalco Chemical Company
    Inventors: Richard J. Strittmatter, Narasimha M. Rao
  • Patent number: 5601725
    Abstract: A method for the dewatering of sludges in industrial waste waters utilizing a hydrophobically-modified coagulant copolymer of diallyldimethyl ammonium chloride and quaternized dimethylaminoethyl acrylate or quaternized dimethylaminoethylmethacrylate and a flocculant.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: February 11, 1997
    Assignee: Nalco Chemical Company
    Inventors: Daniel K. Chung, Chandrashekar S. Shetty, Manian Ramesh
  • Patent number: 5597475
    Abstract: A method for dewatering mineral slurries employing a copolymer of diallyldimethlylammonium halide and a vinyl alkoxysilane, which is preferably a copolymer of diallyldimethylammonium chloride and vinyltrimethoxysilane as a coagulant is disclosed. The method for dewatering mineral slurries containing water comprising the steps of: feeding said mineral slurry into a thickener, treating said mineral slurry with an effective amount of a coagulant which comprises a copolymer of halide and a vinyl alkoxysilane; allowing the water to separate from the mineral slurry, withdrawing the water from said thickener and discharging said mineral products from said thickener. Mineral slurries which can be effectively treated are copper and taconite. The above-mentioned method may also include treatment with a flocculant in conjunction with the coagulant.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: January 28, 1997
    Assignee: Nalco Chemical Company
    Inventors: E. Michael Kerr, Manian Ramesh
  • Patent number: 5597859
    Abstract: A novel dispersant system is disclosed for use in forming dialkylaminoalkyl (meth)acylamide polymer dispersions.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: January 28, 1997
    Assignee: Nalco Chemical Company
    Inventors: John R. Hurlock, Manian Ramesh
  • Patent number: 5597858
    Abstract: An improved process for the preparing a dispersions of water soluble cationic polymers in an aqueous salt solution is disclosed. The improvement comprises using as a polymeric dispersion stabilizer a water soluble hydrophobically associating copolymer of diallyldimethylammonium chloride and a monomer selected from the group consisting of: ##STR1## and alkyl esters of acrylic acid, where R.sub.1 is either hydrogen or CH.sub.3 ; R.sub.2 and R.sub.3 are each an alkyl group having 1 to 3 carbon atoms; A.sub.1 is either an oxygen atom or NH; B.sub.1 is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group, Q is benzyl, or C.sub.6 -C.sub.20 alkyl, and X.sub.1.sup.- is an anionic counterion.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: January 28, 1997
    Assignee: Nalco Chemical Company
    Inventors: Manian Ramesh, Jeffrey R. Cramm, Darrell L. Werges, Christopher P. Howland