Patents Assigned to Betzdearborn, Inc.
  • Chromium-free conversation coating and methods of use
    Patent number: 5801217
    Abstract: Methods and compositions for providing a conversion coating to a metal surface are provided. The methods comprise applying to a metal surface an aqueous composition comprising a diglycidyl ether of Bisphenol A, a fluoroacid, and a silicon compound containing a hydrolyzable group.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: September 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Edward A. Rodzewich, Jiangbo Ouyang, Joseph E. Murphy
  • Methods for inhibiting foam in crude oils
    Patent number: 5800738
    Abstract: Methods for inhibiting foam in crude oil or its fractions undergoing processing are disclosed. Low molecular weight polyisobutylene, preferably of about 320 daltons, is added to the crude oil or fraction experiencing foaming.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: September 1, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart
  • Method for dewatering drinking sludge using a water soluble block copolymer
    Patent number: 5800719
    Abstract: A method for dewatering deinking sludge utilizing a water soluble block copolymer having the structure: ##STR1## wherein E is a polymeric segment obtained from the polymerization of hydrophobic monomers, x when present is a nonionic monomer, y is a cationic monomer, R.sub.1 and R.sub.2 are the same or different and are H or a lower alkyl group from C.sub.1 to C.sub.3 and F is a salt of an ammonium cation. Preferably, the polymer contains from about 20 mole % to 35 mole % cationicity.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: September 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Frank J. Sutman, Richard A. Hobirk
  • Stabilization of magnesium hydroxide slurries
    Patent number: 5788885
    Abstract: A treatment for reducing viscosity and inhibiting settling of an aqueous 30% or higher by weight magnesium hydroxide slurry which comprises adding to the slurry an amount, effective for the purpose of a combination of an alkyl sulfosuccinate surfactant, an alkylaryl sulfonate surfactant, a xanthan gum and a clay, and optionally a water soluble polycarboxylate.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: August 4, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Gregory J. Pomrink, Bruce K. Fillipo
  • Composition and process for the avoidance of slime formation and/or for the removal of biofilm in water-bearing systems
    Patent number: 5789239
    Abstract: The present invention relates to the use of at least one enzyme component from the group consisting of carbohydrases, proteases, lipases and glycol proteases and a short-chained glycol component for the avoidance of slime formation and/or for the removal of biofilm on surfaces of water-bearing systems, in particular of industrial process-water systems. The enzyme component(s) and the glycol component can be added to the water-bearing system either separately, i.e. at different points, or in the form of an enzymatic composition containing the enzyme component(s) and the glycol component.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: August 4, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Mark Emile Eyers, Kristine Laura Ignatius Van Pee, Jozef Van Poele, Jurgen Friedrich Schuetz, Achim Paul Schenker
  • Preparation of water soluble graft copolymers
    Patent number: 5789488
    Abstract: Disclosed are methods for reducing turbidity of aqueous systems and clarifying wastewater systems utilizing a graft copolymer having the structure: ##STR1## whereby the cationic monomer (F) is represented by ##STR2## wherein R is hydrogen or a C.sub.1 to C.sub.3 alkyl group, R.sub.1 is the salt of an ammonium cation, and the molar percentage of a:b is from about 95:5 to about 5:95, with the proviso that the sum of a and b equals 100%.
    Type: Grant
    Filed: June 25, 1996
    Date of Patent: August 4, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Keith A. Bair, Elizabeth V. Bissinger, Ellen M. Meyer
  • Deposition control in pulp and papermaking systems using a composition comprising of polyvinyl alcohol and gelatin
    Patent number: 5779858
    Abstract: Compositions and methods for inhibiting the deposition of organic contaminants from pulp in pulp and papermaking systems are disclosed. The methods add to the pulp or to the deposition prone surface of the papermaking system a composition comprising a polyvinyl alcohol having 50 to 100% hydrolysis and a high molecular weight gelatin having a molecular weight of about 100,000 or higher.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: July 14, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Duy T. Nguyen
  • Treatments to reduce moisture in the dewatering of grain-based cellulosic materials
    Patent number: 5776535
    Abstract: A method of reducing the moisture content of an aqueous stream containing corn fiber during the removal of water from the corn fiber is disclosed, which comprises adding to the stream an effective amount of a polyglycerol ester surfactant.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: July 7, 1998
    Assignee: BetzDearborn Inc.
    Inventor: William J. Palardy
  • Control of moisture addition to bulk solids
    Patent number: 5777890
    Abstract: In a material handling system in which a chemical treatment and water are added to a bulk solid, a method and apparatus for minimizing the amount of moisture added to the bulk solid while effectively controlling dust in the system. A moisture analyzing means monitors the surface moisture level of the bulk solid, and a calibration/measuring means determines the proper amount of chemical and water to be fed to the system for dust control. There are associated means for feeding the chemical treatment and water to the bulk solid, and a dust analyzing means, which monitors dust levels in the system and sends an electrical signal to the calibration/measuring means in order to adjust chemical feed and water flow in the system.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: July 7, 1998
    Assignee: BetzDearborn Inc.
    Inventors: James D. Halley, Michael J. Mowbray, Rodger D. Kurtz
  • Method for treatment of paper machine press section felts
    Patent number: 5776310
    Abstract: This invention relates to the treatment of press section felts. The treatment comprises applying to the felts an effective amount of a felt cleaning agent comprising one or more anionic polymers, selected from the group of polycarboxylic acids and derivatives thereof having an average molecular weight of 500 to less than 5000, 2-phosphino-1,2,4-tricarboxybutane, and an amphoteric surfactant selected from the group consisting of alkyl-N-(3 aminopropyl)-glycines and alkyl-di(aminoethyl)-glycines. The cleaning agent inhibits the blinding of paper machine press section felts and provides improved felt conditioning at much lower concentration levels than known commercial products.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: July 7, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Michael Anthony McDermott, Jurgen Friedrich Schuetz
  • Compositions and methods for breaking water-in-oil emulsions
    Patent number: 5772866
    Abstract: Compositions of an non-alkkoxylated alkylphenol-formaldehyde resin and poly(alkylene glycol) are effective at breaking water-in-oil emulsions in a liquid hydrocarbon. Preferably, the composition is employed in a crude oil desalting system.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5773674
    Abstract: The polymerization of a vinyl aromatic monomer such as styrene is inhibited by the addition of a composition of a benzoquinone derivative and a hydroxylamine compound.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Graciela B. Arhancet, Inge K. Henrici
  • Methods of inhibiting corrosion using halo-benzotriazoles
    Patent number: 5773627
    Abstract: A method of preparing halo-benzotriazoles is disclosed. The method involves mixing an aqueous solution of sodium hypohalite with an aqueous slurry or suspension of a benzotriazole. Preferred sodium hypohalites are sodium hypochlorite or sodium hypobromite and the preferred benzotriazole is tolyltriazole.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Sydia B. Anderson, Michael A. Cady
  • Methods of inhibiting corrosion using halo-benzotriazoles
    Patent number: 5772919
    Abstract: The use of halo-benzotriazoles as corrosion inhibitors in aqueous systems is disclosed. Halo-benzotriazoles such as chloro-tolyltriazole and bromo-tolyltriazole were found to be more effective corrosion inhibitors than tolyltriazole in the presence of chlorine.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventors: David W. Reichgott, Sydia B. Anderson, Michael A. Cady, Roger C. May, Anita G. Monino
  • Methods of separating lignin solids and black liquor from tall oil fatty acids
    Patent number: 5773590
    Abstract: The separation of black liquor, containing lignin, from tall oil is enhanced by the addition of a separation aid. The separation aid is an alkylphenol-formaldehyde resin alkoxylate, a poly (proplyene oxide) ethoxylate, an alkanol amine condensate, or combination thereof.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart
  • Passivation method and composition for galvanized metal surfaces
    Patent number: 5772740
    Abstract: Compositions and methods for passivating galvanized metal surfaces are disclosed. The addition of a paraffin wax, preferably emulsified with nonionic surfactants to commercial passivation treatment (chrome or non-chrome) enhances passivation.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Methods for inhibiting organic contaminant deposition in pulp and papermaking systems
    Patent number: 5762757
    Abstract: Compositions and methods for inhibiting the deposition of organic contaminants from pulp in pulp and papermaking systems are disclosed. The methods add to the pulp or to the deposition prone surface of the papermaking systems a composition comprising a dinonyl sulfosuccinate anionic surfactant which is used in systems containing multivalent cations, preferably calcium ions. The methods also utilize a blend of dioctyl sulfosuccinate and didecyl sulfosuccinate anionic surfactants.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: June 9, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Duy T. Nguyen, J. Barry Wright, Daniel Michalopoulos
  • Biocidal composition and use
    Patent number: 5763482
    Abstract: An antimicrobial composition and method for controlling the growth of microbes in an aqueous system is disclosed, the composition comprising an amount, effective for the purpose of a 2-bromo-2- (bromomethyl)-glutaronitrile and a quaternary ammonium compound.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: June 9, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Donald J. Paterson, Howard A. Cash
  • Methods and apparatus for monitoring water process equipment
    Patent number: 5756880
    Abstract: Methods and apparatus are provided for detection of leaks in boilers containing a temperature control liquid which is supplemented with feedwater and removed as blowdown, main steam and sootblower steam. In a preferred embodiment, the boiler has an automatic liquid level control mechanism. The methods include measuring rates associated with feedwater supplementation and removal, determining the change of mass of the temperature control liquid, determining the unaccounted for water rate, and comparing the unaccounted for water rate with zero to determine if a leak condition is present.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: May 26, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Haiwen Chen, Ke Hong
  • Methods for inhibiting the polymerization of ethylenically unsaturated monomers
    Patent number: 5756870
    Abstract: The polymerization of an ethylenically unsaturated monomer such as isoprene and butadiene is inhibited during storage or handling thereof by the addition of a dihydroxycinnamic acid or derivative thereof.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: May 26, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet