Patents Represented by Attorney Alexander D. Ricci
  • Patent number: 5843238
    Abstract: A method and composition for enhancing the dewatering of starch are disclosed, the composition comprising a combination of a polyoxyethylene-polyoxypropylene (EO-PO) block copolymer and sodium lauryl sulfate.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: December 1, 1998
    Assignee: BetzDearborn Inc.
    Inventor: William J. Palardy
  • Patent number: 5843373
    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: August 22, 1997
    Date of Patent: December 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Ljiljana V. Minevski, Sydia B. Anderson, Michael A. Cady
  • Patent number: 5843299
    Abstract: The corrosion of metals in contact with an aqueous alkanolamine solution in an acid gas removal unit is inhibited by adding a corrosion inhibiting amount of an alkanemonothiol or alkanedithiol compound to the aqueous alkanolamine solution. The alkanemonothiol and alkanedithiol compounds are 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: December 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Ljiljana V. Minevski, Ann L. Lambousy
  • Patent number: 5843337
    Abstract: There is provided a composition comprising tannin containing hydroxyl groups which has been (a) chemically modified by reaction of at least one of said hydroxyl groups with at least one member selected from the group consisting of an esterification agent (e.g. acetic anhydride), etherification agent (e.g. dichloromethane or quaternary organic amine such as N-(3-chloro-2-hydroxypropyl) trimethyl ammonium chloride) to form the corresponding ester, or ether, through said hydroxyl group, and (b) derivatized. The chemically modified tannin is derivatized by reaction with aldehyhde (e.g. formaldehyde), or aldehyde and at least one member selected from the group consisting of ammonia and organic amine containing at least one primary or secondary nitrogen (e.g. cyclohexyl amine); said derivatized tannin being water soluble or dispersable at a pH below 7 and water insoluble at a pH above 7.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: December 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: David Brian Mitchell, Ralph Lemmel Minnis, Thomas Peter Curran, Steven M Deboo, John Arthur Kelly, Rashmi Patwardhan, Wun Ten Tai
  • Patent number: 5840850
    Abstract: Methods of enhancing the dewatering of gluten are disclosed. The methods comprise adding an anionic surfactant to the wet gluten prior to dewatering, as in vacuum dewatering equipment. Particularly effective surfactants are sulfates and sulfonates.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: November 24, 1998
    Assignee: BetzDearborn Inc.
    Inventor: William J. Palardy
  • Patent number: 5833881
    Abstract: A stable aqueous solution comprising a water soluble salt of a magnesium compound, a surfactant and a calcium salt inhibitor is used to reduce deposits in kilns or furnaces used to make iron ore agglomerates, known as pellets, during iron ore calcination.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: November 10, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Donald C. Roe
  • Patent number: 5830383
    Abstract: A method of treating an aqueous system is described which comprises incorporating in the system a hydroxylamine derivative of the general formula: ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 which may be the same or different represents hydrogen, alkyl of 1 to 8 carbon atoms or aryl or a water soluble salt thereof or a precursor thereof, and a tannin in a weight ratio of at least 2:1. This is particularly useful for boiler water systems.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: November 3, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Brian Greaves, Stephen Clifford Poole, Chih Ming Hwa, Joseph Chwei-Jer Fan
  • Patent number: 5830315
    Abstract: There is provided a composition comprising tannin containing hydroxyl groups which has been (a) chemically modified by reaction of at least one of said hydroxyl groups with at least one member selected from the group consisting of an esterification agent (e.g. acetic anhydride), etherification agent (e.g. dichloromethane or quaternary organic amine such as N-(3-chloro-2-hydroxypropyl) trimethyl ammonium chloride) to form the corresponding ester, or ether, through said hydroxyl group, and (b) derivatized. The chemically modified tannin is derivatized by reaction with aldehyhde (e.g. formaldehyde), or aldehyde and at least one member selected from the group consisting of ammonia and organic amine containing at least one primary or secondary nitrogen (e.g. cyclohexyl amine); said derivatized tannin being water soluble or dispersable at a pH below 7 and water insoluble at a pH above 7.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: November 3, 1998
    Assignee: BetzDearborn Inc.
    Inventors: David Brian Mitchell, Ralph Lemmel Minnis, Thomas Peter Curran, Steven M. Deboo, John Arthur Kelly, Rashmi Patwardhan, Wun Ten Tai
  • Patent number: 5817927
    Abstract: Methods and apparatus are provided for detection of leaks in boilers containing a temperature control liquid which is supplemented with feedwater and removed as blowdown and steam. The methods include measuring rates associated with the feedwater supplementation and blowdown and steam removal means, adding a tracer in a manner to ensure a non-constant concentration in the temperature control liquid, determining the concentration of the tracer in the blowdown, calculating the mass of the temperature control liquid, calculating the unaccounted for water rate and comparing this rate with zero to determine if a leak condition is present.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: October 6, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Haiwen Chen, Ke Hong
  • Patent number: 5800738
    Abstract: Methods for inhibiting foam in crude oil or its fractions undergoing processing are disclosed. Low molecular weight polyisobutylene, preferably of about 320 daltons, is added to the crude oil or fraction experiencing foaming.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: September 1, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart
  • Patent number: 5801217
    Abstract: Methods and compositions 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 fluoroacid, and a silicon compound containing a hydrolyzable group.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: September 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Edward A. Rodzewich, Jiangbo Ouyang, Joseph E. Murphy
  • Patent number: 5800719
    Abstract: A method for dewatering deinking sludge utilizing a water soluble block copolymer having the structure: ##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 an ammonium cation. Preferably, the polymer contains from about 20 mole % to 35 mole % cationicity.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: September 1, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Frank J. Sutman, Richard A. Hobirk
  • Patent number: 5788885
    Abstract: A treatment for reducing viscosity and inhibiting settling of an aqueous 30% or higher by weight magnesium hydroxide slurry which comprises adding to the slurry an amount, effective for the purpose of a combination of an alkyl sulfosuccinate surfactant, an alkylaryl sulfonate surfactant, a xanthan gum and a clay, and optionally a water soluble polycarboxylate.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: August 4, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Gregory J. Pomrink, Bruce K. Fillipo
  • Patent number: 5789239
    Abstract: The present invention relates to the use of at least one enzyme component from the group consisting of carbohydrases, proteases, lipases and glycol proteases and a short-chained glycol component for the avoidance of slime formation and/or for the removal of biofilm on surfaces of water-bearing systems, in particular of industrial process-water systems. The enzyme component(s) and the glycol component can be added to the water-bearing system either separately, i.e. at different points, or in the form of an enzymatic composition containing the enzyme component(s) and the glycol component.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: August 4, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Mark Emile Eyers, Kristine Laura Ignatius Van Pee, Jozef Van Poele, Jurgen Friedrich Schuetz, Achim Paul Schenker
  • Patent number: 5789488
    Abstract: Disclosed are methods for reducing turbidity of aqueous systems and clarifying wastewater systems utilizing a graft copolymer having the structure: ##STR1## whereby the cationic monomer (F) is represented by ##STR2## wherein R is hydrogen or a C.sub.1 to C.sub.3 alkyl group, R.sub.1 is the salt of an ammonium cation, and the molar percentage of a:b is from about 95:5 to about 5:95, with the proviso that the sum of a and b equals 100%.
    Type: Grant
    Filed: June 25, 1996
    Date of Patent: August 4, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Keith A. Bair, Elizabeth V. Bissinger, Ellen M. Meyer
  • Patent number: 5779858
    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: May 22, 1996
    Date of Patent: July 14, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Duy T. Nguyen
  • Patent number: 5777890
    Abstract: In a material handling system in which a chemical treatment and water are added to a bulk solid, a method and apparatus for minimizing the amount of moisture added to the bulk solid while effectively controlling dust in the system. A moisture analyzing means monitors the surface moisture level of the bulk solid, and a calibration/measuring means determines the proper amount of chemical and water to be fed to the system for dust control. There are associated means for feeding the chemical treatment and water to the bulk solid, and a dust analyzing means, which monitors dust levels in the system and sends an electrical signal to the calibration/measuring means in order to adjust chemical feed and water flow in the system.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: July 7, 1998
    Assignee: BetzDearborn Inc.
    Inventors: James D. Halley, Michael J. Mowbray, Rodger D. Kurtz
  • Patent number: 5776535
    Abstract: A method of reducing the moisture content of an aqueous stream containing corn fiber during the removal of water from the corn fiber is disclosed, which comprises adding to the stream an effective amount of a polyglycerol ester surfactant.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: July 7, 1998
    Assignee: BetzDearborn Inc.
    Inventor: William J. Palardy
  • Patent number: 5776310
    Abstract: This invention relates to the treatment of press section felts. The treatment comprises applying to the felts an effective amount of a felt cleaning agent comprising one or more anionic polymers, selected from the group of polycarboxylic acids and derivatives thereof having an average molecular weight of 500 to less than 5000, 2-phosphino-1,2,4-tricarboxybutane, and an amphoteric surfactant selected from the group consisting of alkyl-N-(3 aminopropyl)-glycines and alkyl-di(aminoethyl)-glycines. The cleaning agent inhibits the blinding of paper machine press section felts and provides improved felt conditioning at much lower concentration levels than known commercial products.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: July 7, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Michael Anthony McDermott, Jurgen Friedrich Schuetz
  • Patent number: 5772866
    Abstract: Compositions of an non-alkkoxylated 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: August 6, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Paul R. Hart