Patents Represented by Attorney Robert A. Miller
  • Patent number: 5710329
    Abstract: The invention comprises a method of dispersing foulants, residues, gums, precipitates, polymeric tars and other highly oxidized carbonaceous tars which can be formed in the process of manufacture and recovery of acrylic acid. The method comprises adding to the liquid or gaseous phases passing through, or stored in acrylic acid process equipment, an effective antifouling amount of a dispersant which is stable in the environment within an acrylic acid process and is compatible with the equipment used for the manufacture of acrylic acid.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: January 20, 1998
    Assignee: Nalco/Exxon Energy Chemical, L. P.
    Inventor: Hester A. Clever
  • Patent number: 5705394
    Abstract: The invention comprises a method of determining the concentration of a water soluble polymeric treating agent added to wastewater treatment system. The method comprises several steps including dosing the body of water with a predetermined concentration of a treating agent having a fluorescent tag covalently bonded to the treating agent, removing a sample of the water containing the tagged treating agent, analyzing the emissivity of the sample to measure the concentration of the treating agent in the sample and adjusting the concentration of the treating agent accordingly to fit within a predetermined concentration range.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: January 6, 1998
    Assignee: Nalco Chemical Company
    Inventors: Sivakumar Ananthasubramanian, Jitendra T. Shah, Jeffrey R. Cramm
  • Patent number: 5705721
    Abstract: The present invention provides a method for inhibiting fouling deposits in chloroprene production units. The deposits are inhibited by addition to the chloroprene feedstock of an effective amount of a dispersant prepared in accordance with this invention. The dispersants comprise imides which are prepared by reacting substituted succinic anhydrides with amines.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: January 6, 1998
    Assignee: Nalco Chemical Company
    Inventor: Natu R. Patel
  • Patent number: 5702613
    Abstract: The invention provides a method of removing emulsified oil from an industrial wastewater stream. According to the method, a vinylamine polymer is added to the oil containing wastewater in a concentration of from about 0.1 to about 100 parts per million based on the total volume of the water being treated. 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 1 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. The addition of the polymer to the oil containing wastewater causes the emulsified oil to flocculate. The flocculated oil is then removed from the wastewater.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: December 30, 1997
    Assignee: Nalco Chemical Company
    Inventors: Anthony G. Sommese, Ananthasubramanian Sivakumar
  • Patent number: 5702684
    Abstract: A concentration of microbiocides added to fluid systems is monitored by a fluorescence emission method which is based upon the measurement of the fluorescence intensity of an inert fluorescent additive which is added to the microbiocide composition prior to its introduction into the fluid system. Optionally, the fluorescent additive may be metered separately into the fluid system in direct proportion to the amount of industrial microbiocide added. Biocide compositions containing inert fluorescent additives are also disclosed. Preferably the fluid system is an industrial aqueous system. Preferred combinations of biocide and fluorescent additive are glutaraldehyde/1,5-naphthalene disulfonic acid, glutaraldehyde/1,3,6,8-pyrene tetrasulfonic acid, isothiazolone/1,5-naphthalene disulfonic acid, isothiazolone/1,3,6,8-pyrene tetrasulfonic acid, glutaraldehyde/fluorescein, alkyl-dimethylbenzyl ammonium chloride quaternary/2-naphthalene sulfonic acid and 2-(decylthio)-ethanamine/2-naphthalene sulfonic acid.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: December 30, 1997
    Assignee: Nalco Chemical Company
    Inventors: William F. McCoy, John E. Hoots
  • Patent number: 5679261
    Abstract: The invention is a method for clarifying waste water containing turbidity-causing components which comprises: adding to said water an effective turbidity-reducing amount of a water-soluble silicon-containing copolymer coagulant prepared from diallyldimethylammonium halide and a vinyltrialkoxysilane; mixing said copolymer and said water with a mechanical stirring device for sufficient time to allow flocculation of the turbidity-causing components; and then separating the flocculated turbidity-causing components from the waste water to obtain clarified water. Useful polymers for the practice of this invention are copolymers of diallyldimethylammonium halide and vinyltrialkoxysilane.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: October 21, 1997
    Assignee: Nalco Chemical Company
    Inventors: Ananthasubramanian Sivakumar, Manian Ramesh
  • Patent number: 5670055
    Abstract: The invention comprises a method for dispersing biofilms caused by the growth of slime-forming bacteria and other microorganisms in industrial process water. The method comprises adding an effective biofilm dispersing amount of a linear alkylbenzene sulfonate to the industrial process water which contains slime-forming bacteria and other microorganisms. In addition, an alternative embodiment of the invention comprises adding a compound selected from the group consisting of peracetic acid, glutaraldehyde, isothiazolone, methylene bisthiocyanate, thiocyanomethylthio benzothiazole, 2-bromo-2-nitro-1,3-propane diol, dibromonitrilopropane diol, tetralcishydroxy methyl phosphonium sulfate, decylthioethane amine, alkyl dimethyl benzyl ammonium chloride and combinations thereof.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: September 23, 1997
    Assignee: Nalco Chemical Company
    Inventors: F. Philip Yu, William F. McCoy
  • Patent number: 5667697
    Abstract: This invention relates to the clarification of natural waters containing turbidity-causing components. This method comprises the addition of a stable colloidal silica suspension and water based polymeric coagulant to the turbid water. The components of the invention may be added independently, or blended together so that addition is simultaneous. The colloidal silica may also be conditioned by passing over a cationic exchange resin prior to addition of cationic polymer.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: September 16, 1997
    Assignee: Nalco Chemical Company
    Inventors: Kristine S. Salmen, Pek Lee Choo, David A. Picco, Michio Kobayashi
  • Patent number: 5662803
    Abstract: The invention is a method for increasing the effectiveness of water-soluble polymeric additives or water-soluble phosphonates in the recirculating water of processing equipment wherein said water contains ozone and water-soluble polymeric additives or water-soluble phosphonates comprising the step of adding an effective amount of a stabilizer to said waters. The invention is also a method for increasing the effectiveness of ozone treatment in the recirculating waters of processing equipment wherein said water contains ozone and water-soluble additives comprising the step of adding an effective amount of a stabilizer to said waters.
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: September 2, 1997
    Assignee: Nalco Chemical Company
    Inventor: Paul R. Young
  • Patent number: 5660717
    Abstract: Hydrolyzable cations contained in crude oil are removed from crude oil by treatment of the crude oil with an aqueous solution containing 100 to 5000 ppm of a water soluble anionic polymer containing at least 20 mole percent mer groups from the group consisting of acrylic acid, methacrylic acid, sulfomethylated polyacrylamide, aminomethanephosphonic acid modified acrylic acid and their water soluble alkali metal and ammonium salts. By removing the hydrolyzable cations, corrosion occurring on metal surfaces in contact with the treated oil during subsequent refining is reduced.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: August 26, 1997
    Assignee: Nalco/Exxon Energy Chemicals, L. P.
    Inventor: Paul M. Lindemuth
  • Patent number: 5660736
    Abstract: The invention is a method for removing dissolved oxygen from alkaline water which comprises adding to alkaline water containing dissolved oxygen an effective oxygen-scavenging amount of a water-soluble sulfoxylate. A preferred material is sodium formaldehyde sulfoxylate.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: August 26, 1997
    Assignee: Nalco Chemical Company
    Inventors: Paul M. Bizot, Bruce R. Bailey
  • Patent number: 5658798
    Abstract: The invention is a method of monitoring for the presence of certain constituents of food processing streams by measurement of fluorescence. The constituent monitored can be a fluorescing impurity of a food product, or the food product itself if such naturally fluoresces. Moreover, losses of the constituent to be monitored may be determined by concurrent measurement of fluorescence of a fluorescent material added to the food process stream. The method is applicable to the following food processing streams among others: meat, vegetable oil, sugar beet, sugar cane, grain, poultry, fruit and soybean processing streams. Upon determination of a variation of the fluorescing constituent to be measured, the food process can be adjusted accordingly.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: August 19, 1997
    Assignee: Nalco Chemical Company
    Inventors: Gregory K. Bertin, Theresa P. Cawley, John E. Hoots, Brian V. Jenkins, Christine M. Stuart, Terry L. Stuebner
  • Patent number: 5658467
    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 non-oxidizing biocide. The method of the present invention includes the step of adding sufficient amounts of the peracetic acid and the non-oxidizing biocide to industrial process waters.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: August 19, 1997
    Assignee: Nalco Chemical Company
    Inventors: Judy G. LaZonby, Robert E. McCarthy, Nancy L. Casselman
  • Patent number: 5659002
    Abstract: The invention is a process for preparing alkylated tannin Mannich polymers by reacting a tannin Mannich condensation polymer, prepared from a condensed tannin, and amine, and formaldehyde, with an alkylating agent at a pH between 5 and 14. Optionally, the alkylated tannin Mannich polymer may be reacted further with formaldehyde to increase its viscosity.The invention further comprises a method of removing color form waste water utilizing the alkylated tannin Mannich polymer produced by the above process.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: August 19, 1997
    Assignee: Nalco Chemical Company
    Inventors: Peter E. Reed, Martha R. Finck
  • Patent number: 5653886
    Abstract: The present invention related to the use of certain cross-linked diallyldimethyl ammonium chloride polymers in water-in-oil emulsion form for use as coagulants in suspensions of inorganic solids. The diallyldimethyl ammonium chloride polymers are preferably polymers of diallyldimethyl ammonium chloride, acrylamide, and triallylamine. The water-in-oil emulsions are formulated to invert after addition to the inorganic solids suspension, as the suspension travels to a mechanical thickening device for further processing. The inorganic solids from refuse or concentrate mineral processing applications may be coal, copper ore, sand, gravel, taconite, beryllium, trona, kaolin or precious metals.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: August 5, 1997
    Assignee: Nalco Chemical Company
    Inventors: E. Michael Kerr, John R. Hurlock, Lawrence J. Connelly
  • Patent number: 5650072
    Abstract: The invention provides a method for the inhibition of fouling in petrochemical processes. The method comprises adding from about 0.1 to about 10,000 parts per million sulfonated oils, sulfonated fatty acids, sulfated oils, sulfated fatty acids, or naphthalene sulfonate formaldehyde condensates to a petrochemical process to disperse water insoluble foulant into an aqueous system.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: July 22, 1997
    Assignee: Nalco/Exxon Energy Chemicals L.P.
    Inventors: Robert D. Mc Clain, Vincent E. Lewis
  • Patent number: 5648508
    Abstract: Novel metal-organic microporous materials are prepared in solution using mild reaction conditions from a metal or metalloid ion with a ligand containing multidentate functional groups in the presence of a templating agent. The resultant microporous materials are useful in the purification of liquids and gases.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: July 15, 1997
    Assignee: Nalco Chemical Company
    Inventor: Omar M. Yaghi
  • Patent number: 5647995
    Abstract: An improved method is disclosed for the preparation of novel alkali metal diphosphinate salts by the reaction of an acetylenic compound with an alkali metal hypophosphite in the presence of a free radical source, the use of these novel compounds in further reactions to prepare diphosphonate compounds and diphosphinate containing adducts, oligomers and polymers and utilization of these compounds, polymers and oligomers to control calcium carbonate scale and mild steel corrosion in cooling water.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: July 15, 1997
    Assignee: Nalco Chemical Company
    Inventors: James F. Kneller, Donald A. Johnson, Vytas Narutis, Binaifer S. Khambatta
  • Patent number: 5645799
    Abstract: The invention comprises an apparatus for optimizing the dosage of a chemical waste water treatment agent using a fluorescent tracer by processing a sample of the waste water stream and allowing continuous on-stream monitoring of the performance of the chemical waste water treatment agent. The apparatus is comprised of a series of components that sample the waste stream, process the sample for analysis, analyze the sample, record the data in a historical database and, based upon the analysis as compared to historical data, adjust the chemical feed system to optimize the chemical waste water treatment agent according to the programmed optimization logic.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: July 8, 1997
    Assignee: Nalco Chemical Company
    Inventors: Jitendra T. Shah, Ananthasubramanian Sivakumar, David W. Scheimann
  • Patent number: 5643460
    Abstract: A method for separating emulsified oil from water in petroleum production is disclosed. Low molecular weight polymers of dimethylaminoethyl acrylate methyl chloride and benzyl chloride quaternary salt have good activity as reverse emulsion breakers for freeing oil tied up as a oil-in-water emulsion. The polymer reverse emulsion breakers are preferably prepared and used as aqueous solutions to obviate the need for inversion techniques and the use of hydrocarbon compatibilizers and surfactants as required for a latex polymer.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: July 1, 1997
    Assignee: Nalco/Exxon Energy Chemicals, L. P.
    Inventors: Robert A. Marble, Manian Ramesh, Norman Edward Byrne