Patents Assigned to Betz Laboratories, Inc.
  • Patent number: 5500107
    Abstract: A process for the inhibition of corrosion caused by naphthenic acid and sulfur compounds during the elevated temperature processing of crude oil by use of an aryl containing phosphite compound having one of the structures: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are C.sub.6 to C.sub.12 and at least one R group is an aryl radical.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: March 19, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: James G. Edmondson
  • Patent number: 5500133
    Abstract: A contaminant precipitating composition and method are disclosed. The composition comprises a water soluble, branched, polydithiocarbamic acid salt effective for the purpose of precipitating contaminants from an aqueous solution. The method comprises adding an amount of the composition effective for the purpose to the aqueous solution so as to complex, precipitate and remove contaminants from the aqueous solution.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: March 19, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Ellen M. Meyer
  • Patent number: 5500373
    Abstract: A method for determining the concentration of cyanide in an aqueous system is disclosed. The method determines the cyanide concentration from a determination of reference thiocyanate concentrations and will measure the cyanide concentration in the presence of sulfides.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: March 19, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Scott E. Lehrer
  • Patent number: 5500053
    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: June 16, 1995
    Date of Patent: March 19, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Patent number: 5500128
    Abstract: A method and composition for controlling deposition of scale and the like in waters having a high calcium ion content is disclosed. The composition comprises a combination of an alkylidene diphosphonic acid and a water soluble polymeric material.
    Type: Grant
    Filed: February 7, 1995
    Date of Patent: March 19, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Jennifer J. Robertson
  • Patent number: 5494594
    Abstract: A method and composition for reducing and maintaining the coefficient of friction of a metal surface cleaned by an alkaline cleaner, while preventing the formation of foam on said surface, is disclosed. The cleaned metal surface is contacted with a treatment comprising monoethanolamine, an ethoxylated alkyl ether phosphate and a silicate.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: February 27, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Edward A. Rodzewich
  • Patent number: 5492651
    Abstract: Methods are provided for inhibiting the corrosion of iron and iron-containing metals in contact with aqueous systems. Salicylaldoxime is added to cooling water systems to inhibit the corrosion of these metal surfaces.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: February 20, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: William J. Yorke
  • Patent number: 5489718
    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: February 23, 1995
    Date of Patent: February 6, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5489666
    Abstract: A method and compounds 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 compound 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 0, 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: October 7, 1994
    Date of Patent: February 6, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Andrew Solov, Donald T. Freese, Libardo A. Perez
  • Patent number: 5489720
    Abstract: An improved method for inhibiting the polymerization of vinyl aromatic monomer with a hydroxylamine compound is disclosed. The improvement provides for adding a catalytic amount of a phenylenediamine compound to the vinyl aromatic system while replacing any phenylenediamine compound lost as a result of physical removal from the system via the waste stream.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: February 6, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Patent number: 5486334
    Abstract: Methods are provided for inhibiting the corrosion of metals in contact with aqueous systems. Sulfono benzotriazole compounds or their salts are added to these aqueous systems to inhibit the corrosion of metal, such as iron surfaces present in cooling water systems.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: January 23, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Orin Hollander
  • Patent number: 5486296
    Abstract: Detoxification of quaternary ammonium compounds using detoxifying amounts of lignosulfonate.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: January 23, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Joseph C. Petrille, III, Stephen R. Vasconcellos, Michael W. Werner
  • Patent number: 5486294
    Abstract: Disclosed is a method of inhibiting the formation of scales such as barium and strontium sulfate in low pH aqueous system. The method involves treating the aqueous system with a scale control treatment including polyepoxysuccinic acid. Typical low pH aqueous systems where the present invention is particularly useful are oilfield produced water, resin bed water softeners during acid regeneration operations.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: January 23, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: J. Michael Brown
  • Patent number: 5481059
    Abstract: A method for accelerating the settling of finely divided solids in hydrocarbon fluids comprising adding to the hydrocarbon a sufficient settling amount of a polyacrylic acid adducted alkylphenol-formaldehyde resin alkoxylate compound. Preferably, the hydrocarbon is a fluid catalytic cracker slurry containing spent catalyst fines.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: January 2, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Gene F. Brock, Mark S. Binford, Paul R. Hart
  • Patent number: 5476988
    Abstract: A method for accelerating the settling of finely divided solids in hydrocarbon fluids comprising adding to the hydrocarbon a sufficient settling amount of quaternary fatty ammonium compound. Preferably, the hydrocarbon is a fluid catalytic cracker slurry containing spent catalyst fines.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: December 19, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Paul R. Hart, Wiley L. Parker, Alan E. Goliaszewski, April Jean, Scott E. Lehrer
  • Patent number: 5473787
    Abstract: Apparatus and method are provided for on-line cleaning of the tubes of a heat exchanger. Tube cleaners are comprised of two members, a rigid flotation member and an elastomeric cleaning member. The cleaner has a selected density to allow uniform distribution through the tubes and to allow recovery by surface extraction or by strainers. Pressures as the cleaner enters or flows along a tube may be measured and selected.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: December 12, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: James F. Echols
  • Patent number: 5472637
    Abstract: A method and composition for foam control in non-aqueous systems utilizing polyisobutylene compounds. The method is especially well adapted for use in oil distillation units and coking of crude oil residues.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: December 5, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Paul R. Hart
  • Patent number: 5472675
    Abstract: An agglomerating agent for use in the heap leaching of mineral bearing ores is disclosed. The agglomerating agent is a polyvinyl alcohol of moderate to high molecular weight which is partially or fully hydrolyzed. The polyvinyl alcohol agglomerating agent can be used alone or in combination with cement or lime in acidic or alkaline heap leaching operations.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: December 5, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: David M. Polizzotti, Donald C. Roe
  • Patent number: 5472630
    Abstract: Compositions and methods for cleaning and etching an aluminum surface with a low etch, low phosphate alkaline cleaner solution are disclosed. The preferred composition employs a stable combination of an alkali metal hydroxide, gluconic acid, a detergent source, an aluminum sequestrant, an oil emulsifier, a defoamer, and a hydrotrope.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: December 5, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, Edward A. Rodzewich, William L. Harpel
  • Patent number: 5470613
    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, an acrylic/itaconic modified styrene butyl acrylate polymer resin, a fluoacid, and carbon black results in a black no-rinse conversion coating.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: November 28, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Edward A. Rodzewich