Patents Represented by Attorney Steven D. Boyd

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  • Selective oxidation of hydrogen sulfide in molten sulfur
    Patent number: 5686057
    Abstract: A method for inhibiting hydrogen sulfite evolution from molten sulfur is disclosed. The method involves adding a hypohalide to molten sulfur containing hydrogen sulfite. The hypohalide, such as hypochlorite, hyprobromite, and their sodium or calcium salts inhibit the evolution of hydrogen sulfite from molten sulfur.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: November 11, 1997
    Assignee: BetzDearborn Inc.
    Inventors: William L. Witzig, Scott E. Lehrer
  • Cleaning and passivating treatment for metals
    Patent number: 5668096
    Abstract: A cleaning and passivating treatment for metals comprising an amphoteric surfactant which is a caprylic acid derivative of imidazoline compounds. The treatment is substantially free of amines, alkanolamines and phosphates. The preferred treatment includes small quantities of borate ions and molybdate ions. In addition a nonionic surfactant may be added as a foam control agent.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: September 16, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Edward A. Rodzewich, Barry P. Gunagan
  • Cationic block polymer agglomeration agents for mineral bearing ores
    Patent number: 5668219
    Abstract: A process for the percolation leaching of minerals from a mineral-beating ore comprises agglomerating the mineral-bearing ore with an agglomerating agent of a cationic block copolymer having a polymeric segment and a block containing an ammonium cation optionally with a block derived from an acrylamide monomer, forming the ore/agglomerating agent mixture into a heap, and leaching the heap by percolation with a leaching solution for subsequent recovery of the minerals at an acidic pH.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: September 16, 1997
    Assignee: BetzDearborn Inc.
    Inventors: David M. Polizzotti, Wen P. Liao, Donald C. Roe
  • Paint spray booth treatment program for waterborne and/or solventborne paints
    Patent number: 5660734
    Abstract: Methods of treating circulating water containing oversprayed waterborne and/or solventborne paint, such as in a paint spray booth operation with copolymer of lignosulfonate and a cationic monomer subunit with Na.sub.2 CO.sub.3 and/or NaOH. The method does not require the use of metal salts or silicates.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: August 26, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Howard B. Agree, Jen-Chi Chen
  • Recovery of tube cleaners
    Patent number: 5647428
    Abstract: Apparatus and method are provided for removing hard-body cleaners from cooling water downstream of a heat exchanger. The bodies are removed from the cooling water by a screen placed such that water flowing in and out of a container which is open to the atmosphere flows through the screen. Bar rake screens, traveling screens or other stationary forms of screens may be used. The cleaning bodies are removed from the screen by mechanical, gravity or fluid flow forces, and then may be recirculated to a heat exchanger.
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: July 15, 1997
    Assignee: BetzDearborn Inc.
    Inventor: James F. Echols
  • Composition for and method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metals
    Patent number: 5641537
    Abstract: A process for measuring the coating weight of a dried-in-place non-chromate polyacrylamide 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: July 5, 1995
    Date of Patent: June 24, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Detoxification of alkylthioalkylamines with swelling type natural or synthetic clays
    Patent number: 5632899
    Abstract: The present invention is directed to methods of detoxifying water containing alkylthioalkylamine compounds. The methods comprise adding to an aqueous system containing alkylthioalkylamines, a sufficient quantity of a swelling type natural or synthetic clay to neutralize the toxicity associated with alkylthioalkylamines to aquatic organisms.
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: May 27, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Joseph C. Petrille, III, Michael W. Werner, Wilson K. Whitekettle
  • Composition and method for controlling phosphonates tending to precipitate metal ions in water
    Patent number: 5627145
    Abstract: A method for controlling phosphonates which tend to precipitate with metal ions in water treatment operations comprising, adding to the water a water-soluble copolymer containing one or more of the following monomeric units: ##STR1## in which: R is hydrogen or an alkyl group, R.sub.1 is an alkyl group and X is hydrogen, NH.sub.4.sup.+, a water soluble metal ion or organic base; and[b] a monocarboxylic acid monomer; and adding the copolymer to the water to be treated in an amount sufficient to prevent precipitation of said phosphonates.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: May 6, 1997
    Assignee: BetzDearborn Inc.
    Inventor: Peter K. L. G. Thevissen
  • Method of cleaning and passivating a metal surface with acidic system and ethoxylated tertiary dodecyl mercaptan
    Patent number: 5614028
    Abstract: An acid based cleaning and passivating treatment for metal surfaces is provided. The single step acid based cleaning and passivating is provided by incorporating a corrosion inhibiting amount of an ethoxylated tertiary dodecyl mercaptan into an acidic metal cleaner.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: March 25, 1997
    Assignee: BetzDearborn Inc.
    Inventor: Edward A. Rodzewich
  • Method of breaking reverse emulsions in a crude oil desalting system
    Patent number: 5607574
    Abstract: A combination of aluminum chlorohydrate and a polyamine, such as polydiallyldimethyl ammonium chloride in an aqueous solution is described which is an effective emulsion breaker for reverse (oil-in-water) emulsions. The combination is effective at elevated temperatures and in a matrix comprising mostly oil as encountered in a crude oil desalter unit.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: March 4, 1997
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart
  • Water treatment polymer containing poly[oxy-[(hydroxymethyl)-1,2-ethanediyl]] macromonomers and methods of use thereof
    Patent number: 5601754
    Abstract: A polymer and method of controlling corrosion and the formation and deposition of scale imparting compounds in water systems is disclosed. The polymer has the general structure: ##STR1## wherein E.sup.1 comprises the repeat unit obtained after polymerization of one or more .alpha., .beta. ethylenically unsaturated monomers, selected from the group consisting of a carboxylic 3acid, lower alkyl (C.sub.1 -C.sub.6) ester or a hydroxylated lower alkyl (C.sub.1 -C.sub.6) ester of such carboxylic acid, and amide forms thereof; E.sup.2 comprises the repeat unit obtained after polymerization of one or more .alpha., .beta. ethylenically unsaturated monomer containing a sulfonic acid functionality; R.sup.1 is a hydrogen or a lower (C.sub.1 -C.sub.3) alkyl; R.sup.2 is --CH.sub.2 -- O--or --C(.dbd.O)--O--; R.sup.3 is --(--CH.sub.2 --CH(--CH.sub.2 --OH)--O--)--.sub.n ; n is an integer greater than 1; and R.sup.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: February 11, 1997
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Andrew Solov
  • Alkyl-allylphosphonate copolymer used for boiler water treatment
    Patent number: 5594084
    Abstract: A water soluble isopropenylphosphonic acid copolymer composition and method of use thereof are disclosed. The copolymer comprises repeat units (a) of the formula: ##STR1## wherein X=OH or OM, wherein M is a cation, and repeat units (b) of the formula: ##STR2## wherein R.sub.1 and R.sub.2 are independently hydrogen, C.sub.1-10 linear or branched alkyl, phenyl or alkyl substituted phenyl. The copolymers are effective in inhibiting the precipitation of scale forming salts and also act to inhibit corrosion in boiler water systems.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: January 14, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Scott M. Boyette, Alan E. Goliaszewski
  • Calcium carbonate scale controlling method
    Patent number: 5562830
    Abstract: A method of inhibiting corrosion and scale formation and deposition in aqueous systems by adding a combination of a polyepoxysuccinic acid or salts thereof and a phosphonocarboxylic acid or salts thereof.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: October 8, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Davor F. Zidovec, Preetha M. Prabhu
  • Dual feed paint detackification program
    Patent number: 5562833
    Abstract: In a paint spray booth wherein water is used to collect oversprayed paint, a process is disclosed for detackifying and coagulating oversprayed paint by the independent and concurrent addition of specific amounts of specific anions and cationic polymers to the water system.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: October 8, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Howard B. Agree, Robert A. Iezzi
  • Hydrophilic treatment for aluminum
    Patent number: 5545438
    Abstract: A hydrophilic coating for aluminum comprising a substantially chromium-free treatment including phosphoric acid, boric acid and optionally molybdic acid.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: August 13, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, Jeffrey I. Melzer
  • Reactive rinse aid for processing plastic surfaces
    Patent number: 5541257
    Abstract: A method of enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts is disclosed. The method employs an aqueous solution of a tannin compound, which when applied to the surface of plastic parts will not rinse off during subsequent rinse stages and will remain on the plastic parts.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: July 30, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Barry P. Gunagan, Jeffrey I. Melzer
  • Method of inhibiting wet strength resin deposition in papermaking felts
    Patent number: 5520781
    Abstract: This invention relates to an improved press felt conditioning treatment which controls the deposition of poly(aminoamide)--epichlorohydrin type resins in a press felt. The treatment comprises applying to the felt an effective inhibiting amount of a conditioner comprising: an ethoxylated nonylphenol having greater than about 30 moles of ethoxylation; sodium n-hexadecyl diphenyloxide disulfonate; a fatty acid imidazoline or an alkylamidopropyldimethylamine which include an alkyl hydrophobe substituent having a carbon chain length of about 18.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: May 28, 1996
    Assignee: Betz PaperChem, Inc.
    Inventors: Kevin D. Curham, Abdul Q. Khan
  • Aqueous polymerization method for poly(isopropenylphosphonic acid)
    Patent number: 5519102
    Abstract: A method of preparing poly(isopropenylphosphonic acid) is disclosed, which provides a high yield with low initiator charge. The method comprises preparing poly(isopropenylphosphonic acid) by polymerizing a mixture of isopropenylphosphonic acid and isopropenylphosphonic acid anhydride, preferably in an aqueous solution.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: May 21, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Michael A. Cady, William S. Carey, Andrew Solov
  • Chromium and fluoride free metal treatment
    Patent number: 5518555
    Abstract: A heavy metal and fluoride free pretreatment for a metal surface which enhances corrosion resistance and surface adhesion properties is described. The pretreatment is an aqueous solution of an anionic polyacrylamide which can be rinsed or dried in place.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: May 21, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Methods for controlling scale formation in acqueous systems
    Patent number: 5518629
    Abstract: A method of controlling scale formation and deposition and corrosion in aqueous systems is described wherein a treatment solution of a substoichiometric amount of a scale/corrosion inhibitor in combination with a substituted alkylpolycarboxylate is employed. The scale/corrosion inhibitor can be a phosphonate such as hydroxyethylidene diphosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, hydroxyphosphonoacetic acids, amino phosphonates; terpolymers, copolymers and homopolymers of acrylic acid, maleic acid, epoxysuccinic acids such as polyepoxysuccinic acid or mixtures thereof. The substituted alkylpolycarboxylates are compounds of the general structure: R--X--Y.sub.n wherein R is a hydrocarbon functionality having 4 to 18 carbons; X, when present, is --NH--, --NY.sup.1 --, --N-->O, --N--OC--Y.sup.1, --O-- or --S--; n is greater than or equal to 1; and Y and Y.sup.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: May 21, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Libardo A. Perez, William S. Carey, Donald T. Freese, Judith B. Rockett