Patents Assigned to Betzdearborn, Inc.
  • Copolmer formulations for breaking oil-and-water emulsions
    Patent number: 5921912
    Abstract: A method of breaking oil-in-water and water-in-oil emulsions in crude oil processing systems in which copolymers incorporating a hydrophilic cationic monomer subunit and a lipophilic nonionic monomer subunit or dispersions or emulsions of cationic polymers and obverse demulsifiers are employed.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: July 13, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Paul R. Hart, Fu Chen, Wen P. Liao, Walter J. Burgess
  • Methods of inhibiting foam formation in alkanolamine systems
    Patent number: 5921911
    Abstract: A method for inhibiting foam formation in a stripper of an amine unit is disclosed. The addition of non-foaming demulsifiers to the liquid, compressed hydrocarbon stream entering or the aqueous organic amine stream entering or exiting an absorber of an amine unit effectively inhibits foam formation in the amine unit stripper. Foam formation in the stripper is inhibited by controlling the entrainment of hydrocarbon in the alkaline amine stream entering the stripper through demulsification treatment in the absorber.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: July 13, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart
  • Composition and method for water clarification
    Patent number: 5916991
    Abstract: Tannin containing polymers, their method of production and methods of using as water treatment agents are disclosed. The tannin containing polymers comprise copolymers of tannin and a cationic monomer. Another embodiment comprises tannin containing polymers of tannin, cationic monomer and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: June 29, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Jen-Chi Chen, Fu Chen, Gerald C. Walterick, Jr.
  • Corrosion inhibitor for alkanolamine units
    Patent number: 5911916
    Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: June 15, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Ljiljana V. Minevski, Sydia B. Anderson, Michael A. Cady
  • Metal cleaning method
    Patent number: 5909742
    Abstract: A method of cleaning metal surfaces by using a composition of citric acid, a hydroxycarboxylic acid salt, a nonionic surfactant and a coupling agent is used for cleaning metal surfaces and methods of using the same.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: June 8, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, Philip D. Deck, William L. Harpel
  • Crude oil composition comprising an alkylphosphonate antifouling additive
    Patent number: 5910469
    Abstract: Alkylphosphonate ester compounds or acids thereof are disclosed as effective fouling inhibitors in liquid hydrocarbonaceous medium undergoing processing at elevated temperatures.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: June 8, 1999
    Assignee: BetzDearborn Inc.
    Inventors: William S. Carey, Jeffrey H. Peltier, Alan E. Goliaszewski
  • N, N-alkyl polyacrylamide metal treatment
    Patent number: 5908892
    Abstract: An anionic polyacrylamide pretreatment for a metal surface which enhances corrosion resistance and surface adhesion properties is described. The pretreatment is stable at extreme pH's and compatible with other water soluble polymers. The anionic polyacrylamide includes mono- or di-alkyl substitutions on the N group of the polyacrylamide.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: June 1, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, Jen-Chi Chen
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5907071
    Abstract: The polymerization of vinyl aromatic monomers such as styrene is inhibited by the addition of a composition of a stable hindered nitroxyl radical and an oxime compound.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: May 25, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Thermo responsive method of removing cured paint
    Patent number: 5904158
    Abstract: A method of removing layers of heat cured paint buildup on supporting hangers is disclosed. The method includes coating support hangers with a layer of a thermally expandable material in a water soluble carrier and thereafter applying a water insoluble coating layer. The thermally expandable material, the carrier and the water insoluble coating are all selected so as to be relatively unaffected by the curing temperatures of the paint line where the hangers are to be used. When an undesirably thick coating of cured paint has built-up on the hangers, it is removed by heating to a temperature sufficient to expand the thermally expandable material thereby cracking the paint layers. Thereafter, the hangers are soaked in a hot aqueous solution to dissolve the carrier layer and remove the cracked, cured paint layers.
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: May 18, 1999
    Assignee: BetzDearborn Inc.
    Inventors: David B. Mitchell, Ralph L. Minnis, Gene V. Wayman, Steven M. DeBoo, Mark J. Deschryver
  • Methods for controlling macroinvertebrates in aqueous systems
    Patent number: 5900157
    Abstract: Methods for controlling the fouling potential of macroinvertebrates are provided. An effective controlling amount of a polymer comprising a tannin and a cationic monomer is added to an aqueous system suffering from the fouling potential of macroinvertebrates.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: May 4, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Joseph C. Petrille, Michael W. Werner
  • Method for removing ferric-ferrous oxides from a liquid
    Patent number: 5898002
    Abstract: A method for removing ferric-ferrous oxides from a liquid containing ferric-ferrous oxides and ferrous ions and to a method for determining the amount of ferrous ion in a liquid. The invention has particular utility for use in a method to accurately determine the corrosion rates of ferrometals in contact with aqueous liquids by filtering ferric-ferrous oxides from the aqueous liquid prior to determining the ferrous ion content of the aqueous liquid.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: April 27, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Terence P. Small
  • Methods for inhibiting organic contaminant deposition in pulp and papermaking systems
    Patent number: 5885419
    Abstract: Methods for inhibiting the deposition of organic contaminants from pulp in pulp and papermaking systems are disclosed. Albumins, globulins or blends thereof and spray-dried animal blood cells are added to the pulp or sprayed onto deposition prone surfaces of a papermaking system suffering from organic contaminants.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Duy T. Nguyen, Tien-Feng Ling
  • Corrosion inhibitor for alkanolamine units
    Patent number: 5885487
    Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a compound having the formula: ##STR1## where R is S or O, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently H, C.sub.1 to C.sub.8 alkyl, C.sub.1 to C.sub.8 alkenyl, C.sub.6 to C.sub.10 aryl, C.sub.7 to C.sub.12 alkaryl, C.sub.7 to C.sub.12 aralkyl, C.sub.3 to C.sub.10 cycloalkyl, C.sub.1 to C.sub.8 thiophene, or amino groups. The alkanedithiol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Ljiljana V. Minevski
  • Deinking wastepaper containing electrostatic printed ink using branched alcohol alkoxylate surfactant
    Patent number: 5885413
    Abstract: A process for the deinking of wastepaper is disclosed. The process comprises administering a sufficient amount of a branched alcohol alkoxylate surfactant to a sample of waste paper for which treatment is desired. The surfactant is effective for the flotation of the ink.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Sandra K. Richmann, Frank J. Sutman
  • Methods and compositions for inhibiting the polymerization of ethylenically unsaturated monomers
    Patent number: 5886241
    Abstract: The polymerization of an ethylenically unsaturated monomer such as isoprene, butadiene and acrylonitrile is inhibited during storage or handling thereof by the addition of a dihydroxycinnamic acid or derivative thereof.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Inhibition of corrosion in aqueous systems
    Patent number: 5871691
    Abstract: A method and compounds for inhibiting and controlling corrosion is disclosed. The method is particularly effective at inhibiting or preventing corrosion of ferrous-based metals in contact with 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 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: September 27, 1995
    Date of Patent: February 16, 1999
    Assignee: BetzDearborn Inc.
    Inventors: William S. Carey, William C. Ehrhardt, Andrew Solov
  • Method of controlling scale formation in brine concentration and evaporation system
    Patent number: 5866011
    Abstract: A method of treating water to inhibit the formation of salt scale is disclosed. The method is particularly effective at inhibiting the formation and deposition of mineral salts in brine concentration and evaporation systems. The method comprises introducing into the system a polyepoxysuccinic acid of the general formula: ##STR1## where n ranges from about 2 to about 50, M is hydrogen or a water soluble cation such as Na.sup.+, NH.sub.4.sup.+ or K.sup.+ and R is hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: February 2, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Gregory J. McGiffney
  • Method for inhibiting scale and controlling corrosion in cooling water systems
    Patent number: 5866013
    Abstract: A method and composition for simultaneously controlling the deposition of scale and the formation of corrosion in a cooling water system comprising adding to the system a combination of (a) a water soluble copolymer having the structure: ##STR1## wherein R.sub.1 is H or lower (C.sub.1 -C.sub.4) alkyl, F is H.sub.2 or O, M is a water soluble cation, R.sub.2 is (CH.sub.2 --CH.sub.2 --O).sub.n, ##STR2## or mixture of both, n is an integer of from 1 to about 40, R.sub.3 is H, lower (C.sub.1 -C.sub.4) alkyl or an acetate, and (b) a water soluble polymer characterized by the structural formula: ##STR3## wherein R.sub.1 is H or lower alkyl (C.sub.1 -C.sub.3); R.sub.2 is OH, OM, or NH.sub.2 ; M is a water soluble cation; R.sub.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: February 2, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Stephen M. Kessler, Donald T. Freese
  • Compositions and Methods for inhibiting the deposition of organic contaminants in pulp and papermaking systems
    Patent number: 5866618
    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: August 6, 1997
    Date of Patent: February 2, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Duy T. Nguyen
  • Resinous composition cleaner
    Patent number: 5866523
    Abstract: A cleaning composition and method of use are disclosed. The composition comprises a mixture of a ketone, at least one glycol ether, water and optionally a surfactant. The composition when applied to substrates coated with resinous coatings is effective for removing the coating from the substrate.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: February 2, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Umit Turunc, Patricia A. Popowich