Patents Represented by Attorney Alexander D. Ricci
  • Patent number: 5720887
    Abstract: The present invention provides a method for dewatering sludge that utilizes the step-wise and sequential addition to the sludge of a cationic polyamine and a cationic polyacrylamide.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: February 24, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Stephen R. Vasconcellos, Michael R. Wood, Kimberly A. Bell
  • Patent number: 5720888
    Abstract: A method of flocculating coagulated and/or finely divided suspended matter in aqueous systems comprising adding to the system from 0.005 to 1 weight percent based on the dry weight of the coagulated and/or finely suspended matter of at least one water soluble cationic polymer selected from a water soluble cationic copolymer (I) composed of the polymerization reaction of an N-vinylamide with at least one cationic quaternary amine monomer.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: February 24, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Lawrence Lu Kuo, Roger Yiming Leung
  • Patent number: 5719224
    Abstract: A method and composition for detackifying or coagulating and flocculating waterborne and mixed waterborne/solventborne paints in paint spray booth water. Aluminum chlorohydrate and a tannin containing polymer, preferably in an aqueous solution, are added to the paint spray booth water to detackify or coagulate and flocculate the paints.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: February 17, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Howard B. Agree, Jen-Chi Chen, Robert A. Iezzi
  • Patent number: 5708108
    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 an .alpha.,.beta. ethylenically unsaturated carboxylic acid monomers, 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, or amide forms thereof; E.sup.2 comprises the repeat unit obtained after polymerization of an .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: May 3, 1996
    Date of Patent: January 13, 1998
    Assignee: BetzDearborn Inc.
    Inventors: William S. Carey, Andrew Solov
  • Patent number: 5707533
    Abstract: A process for preparing a water-soluble polymer dispersion is herein provided which is characterized by polymerizing from about 10 to 50 mole percent of a monomer having a formula (II); from about 1 to 50 mole percent of N-alkylacrylamide, N, N-dialkylacrylamide or mixtures thereof; having a formula (III) from about 1 to 70 mole percent acrylamide; and optionally up to about 4 mole percent of a monomer having a formula (I) having a benzyl functionality. The polymerization is carried out in the presence of an aqueous solution of a polyvalent anionic salt which contains (1) a water soluble cationic polymer which is insoluble in the aqueous salt solution and (2) a water soluble cationic polymer which is soluble in the aqueous salt solution.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: January 13, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Edward J. Connors, Michelle L. Cotter, Fu Chen
  • Patent number: 5705077
    Abstract: A method of treating water to inhibit the formation of fluoride salt scale is disclosed. The method is particularly effective at inhibiting the formation and deposition of fluoride containing salts in spray water cooling systems such as steel casting systems. The method comprises introducing into the aqueous system a polyepoxysuccinic acid of the general formula: ##STR1## where n ranges from about 2 to about 11, 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: January 31, 1996
    Date of Patent: January 6, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Jennifer J. Robertson
  • Patent number: 5700893
    Abstract: A water-soluble cationic copolymer comprising a reaction product of N-vinylamide having the general formula: ##STR1## and a cationic quaternary amine having the formula: ##STR2## wherein Y is C(.dbd.O)O(CH.sub.2).sub.n N.sup..sym. R.sup.4 R.sup.5 R.sup.6 X.sup..crclbar., or ##STR3## X.sup..crclbar.,n is 1 to 5; R.sup.1, R.sup.2, R.sup.3 are independently H or C.sub.1 to C.sub.3 alkyl, R.sup.4, R.sup.5, and R.sup.6 are independently C.sub.1 to C.sub.3 alkyl, X is a halide, hydroxyl or alkylsulfate anion.The copolymers of this invention are useful as flocculating agents, and are particularly useful as drainage/retention aids in pulp and papermaking operations.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: December 23, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Lawrence Lu Kuo, Roger Yiming Leung, Kenneth Samuel Williams
  • Patent number: 5700525
    Abstract: Compositions and methods for passivating galvanized metal surfaces are disclosed. The addition of a paraffin wax, preferably emulsified with nonionic surfactants to commercial passivation treatment (non-chrome) enhances passivation.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: December 23, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Patent number: 5695092
    Abstract: In a treatment system for feeding a liquid from a tank having an outlet by a controllable pump operated cyclically, an automatic calibration/measuring system. The system is arranged for determining the volume of liquid pumped each cycle of the pump, a fluid flow measuring device and a controller coupled thereto. The fluid flow measuring device is in fluid communication with the tank. The fluid flow measuring device has a totalizer counter and batch measurement capability. The batch value in units of fluid volume or mass measurement is configured into the fluid flow measuring device. At the start of the batch, the fluid flow measuring device sends a ready signal to the controller that it is waiting to start the batch. The controller sends a start signal to the fluid flow measuring device that will initialize (zero reset) the totalizer counter and also tells the fluid flow measuring device that the batch has started and the totalizer to start the count of flow measurement.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: December 9, 1997
    Assignee: BetzDearborn Inc.
    Inventor: Henry M. Schrandt
  • Patent number: 5695652
    Abstract: Methods for inhibiting the attachment of microbes to surfaces in aqueous systems are disclosed.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: December 9, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Roy Hernandez-Mena, Richard J. Sujdak
  • Patent number: 5696194
    Abstract: A process for preparing a water-soluble polymer dispersion is herein provided which is characterized by polymerizing from about 10 to 50 mole percent of a monomer having a formula (II); from about 1 to 50 mole percent of N-alkylacrylamide, N,N-dialkylacrylamide or mixtures thereof; having a formula (III) from about 1 to 70 mole percent acrylamide; and optionally up to about 4 mole percent of a monomer having a formula (I) having a benzyl functionality. The polymerization is carried out in the presence of an aqueous solution of a polyvalent anionic salt which contains (1) a water soluble cationic polymer which is insoluble in the aqueous salt solution and (2) a water soluble cationic polymer which is soluble in the aqueous salt solution.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: December 9, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Edward J. Connors, Michelle L. Cotter, Fu Chen
  • Patent number: 5695300
    Abstract: A boom system having a flexible barrier is supported by floats on offset arms. The offset arms and floats thereon are mounted to the barrier in a manner which allows the angle between the barrier and the offset arms to be easily varied. The orientation of the barrier with respect to the surface the boom system is disposed on can thus be easily varied to account for variations in wind, waves and currents. Furthermore, the orientation of the barrier is controlled without the use of ballast weights.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: December 9, 1997
    Assignee: BetzDearborn Inc.
    Inventors: James F. Echols, Marvin Echols, deceased
  • Patent number: 5693866
    Abstract: In the thermal processing of crude alkanolamines, a method of inhibiting color formation in the alkanolamines comprising adding an amount, effective for the purpose, of an alkali metal hydroxide or sulfite, or mixtures thereof.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: December 2, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Paul V. Roling, Quincy K. A. Sintim, J. Frederick Martin
  • Patent number: 5693371
    Abstract: Methods for providing a conversion coating to a metal surface are provided. The methods comprise applying to a metal surface an aqueous composition comprising a diglycidyl ether of Bisphenol A, a fluoacid, and a silicon compound containing a hydrolyzable group.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: December 2, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Edward A. Rodzewich, Jiangbo Ouyang, Joseph E. Murphy
  • Patent number: 5693216
    Abstract: Methods and compositions for breaking oil and water emulsions are disclosed. Oil and water emulsions are broken by treating the emulsion with a copolymer of tannin and a cationic monomer. The preferred composition is an aqueous solution of a copolymer of tannin and a cationic monomer, a water soluble organic multivalent salt and a glycol. The preferred salt is aluminum chlorohydrate and the preferred glycol is hexylene glycol.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: December 2, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Paul R. Hart, Jen-Chi Chen, Fu Chen, Thai H. Duong
  • Patent number: 5693290
    Abstract: A method and composition for controlling corrosion of metals in contact with an aqueous system is disclosed, which method includes introducing into the aqueous system a sufficient amount of a substantially zinc-free treatment comprising a phosphate compound, and glucoheptonic acid or a water soluble salt thereof.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: December 2, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Stephen M. Kessler, Roger C. May
  • Patent number: 5693257
    Abstract: Compositions of an alkylphenol-formaldehyde resin and poly(alkylene glycol) are effective at breaking water-in-oil emulsions in a liquid hydrocarbon. Preferably, the composition is employed in a crude oil desalting system.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: December 2, 1997
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart
  • 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
  • Patent number: 5684109
    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: May 20, 1994
    Date of Patent: November 4, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Jen-Chi Chen, Fu Chen, Gerald C. Walterick, Jr.
  • Patent number: 5683588
    Abstract: A method for stabilizing an aqueous solution containing sulfite or bisulfite ions and a water-soluble metal catalyst. The method comprises incorporating a stabilizing amount of a alpha substituted carboxylic acid or salt thereof or a vinyl carboxylic acid or salt thereof in the solution. The carboxylic acid inhibits sludge formation when the aqueous solution is stored. The preferred carboxylic acid, citric acid, also enhances the oxygen scavenging rate of the sulfite and bisulfite when the solution is used to treat aqueous systems for oxygen removal.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: November 4, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Gregory J. Pomrink, Bruce K. Fillipo, Eric R. Carver, Paul R. Burgmayer