Patents Assigned to Betz Laboratories, Inc.
  • Method for the inhibition and removal of ammonium chloride deposition in hydrocarbon processing units
    Patent number: 5387733
    Abstract: A method for the inhibition and removal of ammonium chloride deposits on the internal surfaces of the equipment in a refinery which processes liquid hydrocarbon at elevated temperatures consisting of adding to the liquid hydrocarbon a non-filming polyamine. The amount of non-filming polyamine added to the system is based upon the amount of ammonium chloride present in the system and is preferably in the range of about 1 to 10 moles per mole of ammonium chloride.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: February 7, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Carl E. Weaver
  • Use of anionic surfactant/dispersant blends for the deinking of groundwood newsprint
    Patent number: 5387355
    Abstract: A composition and method for the improved deinking of groundwood newsprint is disclosed. The composition comprises an amount, effective for the intended purpose, of: 1) an anionic surfactant, e.g., the ammonium or sodium salts of a sulfated ethoxylate derived from a 12 to 14 carbon linear primary alcohol blend, and 2) a dispersant, e.g., naphthalene-formaldehyde condensates.The method comprises administering a sufficient amount of this combined treatment to a sample of groundwood newsprint for which treatment is desired.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: February 7, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Mary Beth Letscher
  • Water soluble graft copolymers for paint spray booth sludge dewatering
    Patent number: 5385676
    Abstract: A method of dewatering paint spray booth sludge by adding to the water system of a paint spray booth a water soluble graft copolymer having the structure: ##STR1## wherein E is the repeat unit obtained after polymerization of an, ethylenically unsaturated compound, the molar percentage of a:b is from about 95:5 to 5:95, with the proviso that the sum of a and b equals 100%; G comprises the structure: ##STR2## wherein d is a cationic monomer, R.sub.1, R.sub.2 and R.sub.3 are the same or different and are hydrogen or a lower alkyl group having C.sub.1 to C.sub.3, F is the salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: January 31, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Wen P. Liao, Deborah L. Purnell
  • Control of scale formation in aqueous systems
    Patent number: 5378372
    Abstract: A method and polymers for inhibiting the formation of scale is disclosed. The method is particularly effective at inhibiting the formation and deposition of calcium scales in circulating aqueous systems such as cooling water systems. The method comprises introducing into the aqueous system a polymer of the general formula: ##STR1## wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R" are each independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl; Z is O, S, NH, or NR, where R is as described above; n is a positive integer greater than 1; f is a positive integer; and M is hydrogen, a water soluble cation (e.g., NH.sub.4.sup.+, alkali metal), or a C.sub.1 -C.sub.3 alkyl group.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: January 3, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Andrew Solov, Donald T. Freese, Libardo A. Perez
  • Composition for controlling scale formation in aqueous systems
    Patent number: 5378390
    Abstract: A method and composition for controlling the formation and deposition of scale forming salts in a circulating aqueous system is described wherein a treatment solution of a substoichiometric amount of polyepoxysuccinic acid in combination with agaric acid is employed.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: January 3, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Libardo A. Perez, Donald T. Freese, Judith B. Rockett, William S. Carey
  • Transport and deposit inhibition of copper in boiler systems
    Patent number: 5378373
    Abstract: This invention relates to a method of transporting and inhibiting the deposition of copper and copper-containing metals on metal surfaces in steam generating systems. This method utilizes a sulfono benzotriazole compound or salt thereof as the treatment agents.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: January 3, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Orin Hollander
  • Water soluble graft copolymers and methods of use thereof
    Patent number: 5374336
    Abstract: A water soluble graft copolymer useful as retention and drainage aids in papermaking processes having the structure: ##STR1## wherein E is the repeat unit obtained after polymerization of an .alpha.,.beta. ethylenically unsaturated compound, the molar percentage of a:b is from about 95:5 to 5:95, with the proviso that the sum of a and b equals 100%; G comprises the structure: ##STR2## wherein d is a cationic monomer, R.sub.1, R.sub.2 and R.sub.3 are the same or different and are hydrogen or a lower alkyl group having C.sub.1 to C.sub.3, F is the salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: December 20, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: John T. Lin, Wen P. Liao, Fu Chen
  • Microbial inhibiting compositions and their use
    Patent number: 5369115
    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: October 29, 1993
    Date of Patent: November 29, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Deborah K. Donofrio, Wilson K. Whitekettle
  • Use of dispersant additives as process antifoulants
    Patent number: 5368777
    Abstract: Reaction products of polyalkenylsuccinic anhydrides with a prereacted product of polyamine and a cyclic carbonate are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils, during processing of such liquids at elevated temperatures.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: November 29, 1994
    Assignee: Betz Laboratories, Inc.
    Inventor: David R. Forester
  • Methods for treating wastewater
    Patent number: 5368744
    Abstract: A method for the flocculation of wastewater comprising a block copolymer having the formula: ##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 a ammonium cation. The block copolymer is added to the wastewater particularly oily wastewater, to flocculate contaminants.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: November 29, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Michael R. Wood, Stephen R. Vasconcellos
  • Corrosion control composition and method for boiler/condensate steam system
    Patent number: 5368775
    Abstract: A corrosion control composition and method for boiler/condensate steam systems is provided. Corrosion is controlled by the addition to the feedwater of a relatively high molecular weight amine. The high molecular weight amine is formulated so that at the conditions of temperature and pressure in the boiler/condensate steam system, partial degradation into more volatile amines occurs. The resulting blend of neutralizing amines provides the superior corrosion control of a blend of neutralizing amines from a single amine feed. The preferred high molecular weight amine is dimethylaminopropylamine which will partially degrade into dimethylamine, trimethylamine, methylamine, and dimethylaminopropanol.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: November 29, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Anthony M. Rossi, Alexander C. Mc Donald
  • Method for dewatering municipal solid waste refuse
    Patent number: 5366637
    Abstract: A method for dewatering the refuse ash generated by a municipal solid waste facility by adding to the ash a copolymer and a nonionic surfactant selected from the group consisting of primary alcohol ethoxylates, secondary alcohol ethoxylates and alkyl phenol ethoxylates. The copolymer consists of repeat units of an ethylenically unsaturated compound and an acrylamido alkane sulfonic acid compound.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: November 22, 1994
    Assignee: Betz Laboratories, Inc.
    Inventor: Umit Turunc
  • Reactive silane composition and process for enhanced drainage of residual aqueous rinse on the external surfaces of plastic parts
    Patent number: 5354494
    Abstract: Processes for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts, such as auto fascia, are disclosed. The processes employ an aqueous solution of an amine functional silane compound, which when applied to the surfaces of plastic parts will not rinse off during subsequent rinse stages and will remain on the plastic parts.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: October 11, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Barry P. Gunagan, Jeffrey I. Melzer, Edward A. Rodzewich, Robert A. Iezzi
  • Method and composition for controlling the growth of microorganisms
    Patent number: 5352706
    Abstract: A microbial inhibiting composition and method is disclosed. The composition comprises an amount, effective for the intended purpose of diiodomethyl-p-tolylsulfone and alkyl dimethyl benzyl ammonium chloride. The method comprises administering an amount of this combined treatment to the particular water containing system for which treatment is desired.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: October 4, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Deborah K. Donofrio, Wilson K. Whitekettle
  • Copolymers of ethylenically unsaturated and polyethylene-glycol monomethacrylate monomeric repeat units useful as scale control agents in boiler systems
    Patent number: 5350536
    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 14 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: April 27, 1993
    Date of Patent: September 27, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Fu Chen, Keith A. Bair, Scott M. Boyette
  • Treatment for galvanized metal
    Patent number: 5344504
    Abstract: An aqueous coating solution for zinc containing metals such as galvanized iron and steel. The coating solution is resistent to the formation of zinc induced sludge and can be operated with little or no overflow. The aqueous treatment solution contains from 0.1 to 10 grams per liter of a fluorometallic acid, from 0.015 to 6 grams per liter of a salt of a transition metal, from 1 to 30 grams per liter zinc; and optionally from 0.1 to 3 grams per liter a polymer of acrylic acid, methacrylic acid, or an ester thereof with a C1 to C8 alkanol.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: September 6, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Philip D. Deck, Jeffrey I. Melzer, William L. Harpel
  • Non-chromium passivation method and composition for galvanized metal surfaces
    Patent number: 5344505
    Abstract: A substantially chromium free composition and method for passivating a galvanized metal surface is disclosed. The passivation treatment which may be rinsed or dried-in-place includes phosphoric acid, boric acid and optionally molybdic acid.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: September 6, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Methods for inhibiting the corrosion and deposition of iron and iron-containing metals in aqueous systems
    Patent number: 5342548
    Abstract: Methods are provided for inhibiting the corrosion of iron and iron-containing methods in contact with aqueous systems. Trisodium salt of 2,4,6-trimercapto-5-triazine is added to cooling water systems to inhibit the corrosion of these metal surfaces.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: August 30, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: William J. Yorke, Edmund J. Bockowski
  • Use of polyalkenyl succinimides-glycidol reaction products as antifoulants in hydrocarbon process media
    Patent number: 5342505
    Abstract: Reaction products of polyalkenyl succinimides with an epoxy alkanol are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenyl succinic anhydride precursor is reacted with an alkenylpolyamine to form a polyalkenyl succinimide intermediate which, in turn, is reacted with an epoxy alkanol.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: August 30, 1994
    Assignee: Betz Laboratories, Inc.
    Inventor: David R. Forester
  • Compositions for controlling scale formation in aqueous system
    Patent number: 5342540
    Abstract: The treatment of an aqueous system to inhibit scale formation with a polyepoxysuccinic acid scale inhibitor, an acrylic acid copolymer and a lanthanide ion blending agent.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: August 30, 1994
    Assignee: Betz Laboratories, Inc.
    Inventor: Libardo A. Perez