Patents Assigned to Betz Laboratories, Inc.
  • Patent number: 5470440
    Abstract: Vinyl aromatic monomer polymerization methods utilizing a composition of 2,6-di-tert-butyl-4-methylphenol and a substituted benzoquinonediimide compound are disclosed. Preferably, the composition is employed in an amount of 1 part to 10,000 parts per million parts monomer during distillation of styrene.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: November 28, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5468377
    Abstract: A water treatment system including a tank for containing a solid treatment product such as a solid halogen. The water treatment system is adapted to be used in combination with a cooling system wherein treated water is fed to the cooling system through an outlet conduit leading from the tank. Drainage of water from the tank is facilitated by use of an eductor connected to an inlet conduit for the tank whereby water is drained from the tank to the inlet conduit and back to the outlet conduit, and is thereafter conveyed back to the cooling system. Thus, a closed system is formed by the treatment system in combination with an associated cooling system wherein the closed system is substantially environmentally safe in that drainage of the tank outside of the closed system is avoided.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: November 21, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: J. Steven Clavin, Bradley J. Peters, Henry M. Schrandt
  • Patent number: 5468739
    Abstract: Methods for controlling the fouling potential of Asiatic clams in aqueous systems are provided. The methods comprise adding to the aqueous system an effective controlling amount of a tetraalkyl phosphonium salt compound. The preferred compound is tri-butyltetradecyl phosphonium chloride.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: November 21, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Wilson K. Whitekettle, Joseph C. Petrille, Michael W. Werner
  • Patent number: 5468412
    Abstract: A cleaning and passivation treatment for metal surfaces which is essentially phosphate free and resistant to foaming in soft water is disclosed. The treatment solution includes relatively water insoluble surfactants without the use of conventional hydrotropes. The treatment solution includes an aqueous solution of monoethanolamine, boric acid, a non-ionic surfactant having a cloud point below about 25.degree. C. and a hydrotropic coupling agent preferably a combination of caprylic acid and capric acid.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: November 21, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Edward A. Rodzewich
  • Patent number: 5466381
    Abstract: An improved oxygen scavenger for aqueous mediums is disclosed which is a disubstituted, water soluble azo compound.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: November 14, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Alan E. Goliaszewski, Michael A. Cady, Paul R. Burgmayer, Sydia B. Anderson, William S. Carey, Roger D. Moulton
  • Patent number: 5464525
    Abstract: A process for the inhibition of corrosion caused by naphthenic acid during the elevated temperature processing of crude oil or the high temperature distillates derived therefrom by use of a treatment comprising a mercaptotriazine compound.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: November 7, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: James G. Edmonson
  • Patent number: 5464484
    Abstract: Compositions and methods for cleaning aluminum while providing oil splitting and no oxide build-up on the aluminum surface including an alkali metal silicate and a quaternary cationic surfactant in an alkaline aqueous cleaning solution.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: November 7, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Edward A. Rodzewich
  • Patent number: 5460698
    Abstract: A method for inhibiting the formation of foam in a papermaking system by adding a foam control composition consisting of a) either a polyoxyethylene-polyoxypropylene fatty alcohol or polyoxyethylene-polyoxypropylene difatty acid and b) oleic diethanolamide.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: October 24, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Duy T. Nguyen
  • Patent number: 5451431
    Abstract: A non-chromate conversion coating for metal surfaces such as aluminum, steel, galvanized steel and zinc-aluminum steel consisting of an aqueous solution of a cationic polymer, an alkaline aqueous silicate and an organofunctional silane.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: September 19, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Deborah L. Purnell, Brenda S. Morris, David W. Reichgott
  • Patent number: 5451270
    Abstract: A process for measuring the coating weight of a dried-in-place non-chromate polyacrylamide/surfactant based conversion coating is disclosed. An ammonium hexafluorotitanate tracer added to such a conversion coating was found to not adversely affect coating properties. The tracer was found to remain proportional to the polymer matrix when the coating was analyzed by X-ray fluorescence.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: September 19, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Patent number: 5446220
    Abstract: Methods for inhibiting the polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. These methods comprise adding from 1 to about 10,000 parts per million parts monomer of a combination of a dinitrophenol compound, a hydroxylamine compound and a phenylenediamine compound. Preferably, 2-sec-butyl-4,6-dinitrophenol or 4,6-dinitro-o-cresol are used in combination with bis-(hydroxypropyl)hydroxylamine and N,N' -di-sec-butyl-p-phenylenediamine.
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: August 29, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5445758
    Abstract: A composition for controlling the deposition of scale imparting species on the structural surfaces of steam generating systems comprising the use of a water soluble polymer having the structure ##STR1## wherein R.sub.1 is H or lower (C.sub.1 -C.sub.4) alkyl, R.sub.2 is (CH.sub.2 --CH.sub.2 --O).sub.n, ##STR2## or a mixture of both, and n is an integer of from about 1 to about 40, R.sub.3 is H, lower (C.sub.1 -C.sub.4) alkyl or an acetate. This polymer may also be used in concert with topping agents such as phosphoric acids, phosphonic acids, amines, metal chelating agents and oxygen scavengers.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: August 29, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Fu Chen, Keith A. Bair, Scott M. Boyette
  • Patent number: 5441773
    Abstract: A black, no-rinse conversion coating on metal surfaces is provided. The treatment of a metal such as aluminum or aluminum alloys with a composition of hexavalent chromium, a modified styrene acrylic resin, carbon black thickeners, surfactants and coalescents results in a black no-rinse conversion coating. The black coating provides corrosion resistance and is resistant to gasoline, hot oil and ethylene glycol. The coating solution is particularly effective on complex shapes having closely spaced parts such as automotive radiators or condensers.
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: August 15, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Edward A. Rodzewich
  • Patent number: 5441572
    Abstract: A method and composition for cleaning aluminum surfaces is disclosed. The surfaces are contacted with a treatment comprising potassium hydroxide, a silicate compound and an alkyl imino acid surfactant.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: August 15, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Edward A. Rodzewich
  • Patent number: 5437712
    Abstract: A method for inhibiting the deposition of zinc, iron, and mixed zinc-iron metals on the metal surfaces of a scrubber system comprising adding to said scrubber system a water soluble polymer having repeat units (a) and (b) of the structure ##STR1## wherein M is a water soluble cation. This invention is particularly effective at inhibiting zinc, iron, and mixed zinc-iron deposition on the metal surfaces of the fan, fan shroud and mist eliminator of the scrubber system.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: August 1, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Stuart D. Klatskin, Robert F. Brazier
  • Patent number: 5432184
    Abstract: A biocidal composition and method for inhibiting and controlling the growth of the fungus, Trichoderma viride, are disclosed. The composition comprises an amount, effective for the intended purpose of diiodomethyl-p-tolylsulfone and an additional biocidal component. The method comprises administering between about 0.1 to about 200 parts of this combined treatment (based on one million parts of the desired aqueous system) to the particular water containing system for which treatment is desired.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: July 11, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Deborah K. Donofrio, Wilson K. Whitekettle
  • Patent number: 5425914
    Abstract: A method of inhibiting the corrosion of iron-based metallurgies in contact with cooling water systems under severe corrosion inducing conditions comprising adding to said cooling water an aqueous combination of an alcohol, an acid, a fatty imidazoline, and an ethoxylated fatty diamine.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: June 20, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: J. Michael Brown, Herbert A. Roberts, John J. Herrold
  • Patent number: 5426257
    Abstract: Compositions and methods for inhibiting polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. The compositions comprise an oxime compound and a hydroxylamine compound and, alternatively, an oxime compound, a hydroxylamine compound and a phenylenediamine compound. The methods comprise adding either of the compositions to the vinyl aromatic monomer in an amount ranging from 1 to about 10,000 parts per million parts monomer.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: June 20, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5422010
    Abstract: A method and composition for inhibiting silica and silicate deposition on metal surfaces in contact with aqueous systems is disclosed.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: June 6, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Andrew Solov, Libardo A. Perez
  • Patent number: 5415805
    Abstract: A composition and method for inhibiting corrosion of iron and iron-containing metals in contact with aqueous systems containing sulfide compounds. The composition comprises (A) an aqueous solution of an alcohol, an acid, a fatty imidazoline, and an ethoxylated fatty diamine, and (B) an aqueous solution of a molybdate compound or salt thereof.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: May 16, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: J. Michael Brown, James R. Ohlsen, Richard D. McBride