Patents Represented by Attorney R. L. Andersen
  • Patent number: 5128067
    Abstract: A flame retardant grease composition is described for low temperature applications comprising mixed alkoxy and alkylated phenyl triesters of a phosphorus oxyacid as a base fluid and a siliceous microparticulate inorganic thickener. The grease has excellent low, medium and high temperature physical properties, which makes it suitable for service in applications with wide temperature (-40.degree. C. to +150.degree. C.) fluctuations. The benefits of reduced rolling resistance can be realized in significant energy savings and the possibility of constructing longer conveyor lines with existing drive motors.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: July 7, 1992
    Assignee: FMC Corporation
    Inventor: Douglas G. Placek
  • Patent number: 5128496
    Abstract: The invention is a process for preparing a solid, storage-stable tris(bromophenyl)phosphate ester by the phosphorylation of a bromophenol and recovering the product by cooling a solution of the reaction mixture from a hydrocarbon solvent containing 2 to 20 parts of a C5 to C10 alkane per part of a C6 to C10 arene.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: July 7, 1992
    Assignee: FMC Corporation
    Inventor: Louis T. Gunkel
  • Patent number: 5100624
    Abstract: An apparatus and a method is provided for measuring the rate of flow of gas from a sample of a peroxygen, such as, hydrogen peroxide, thereby indicating the stability of the peroxygen. The invention overcomes the disadvantages of the prior methods which are less precise and have a long time delay.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: March 31, 1992
    Assignee: FMC Corporation
    Inventor: Edward F. Dougherty
  • Patent number: 5069919
    Abstract: A high yield process is provided for treating lignocellulose food fiber to sanitize and bleach the fiber. The process is not only a high yield process but produces better or equivalent bleaching than alternative processes and further does not produce a waste disposal problem. The process also has the advantage of requiring very little energy compared to alternative processes.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: December 3, 1991
    Assignee: FMC Corporation
    Inventor: A. Thomas Weibel
  • Patent number: 5045296
    Abstract: A process is provided to react anhydrous carbonate with a particle size between 300 and 74 micrometers and hydrogen peroxide containing a hydroxyalkylidene diphosphonic acid to produce sodium carbonate perhydrate containing 13% to 141/2% active oxygen. The process differs from the prior art in that reaction mixture is substantially dry at all times. The product is stable even without added stabilizers.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: September 3, 1991
    Assignee: FMC Corporation
    Inventors: Henry A. Pfeffer, Charles Adams, Jr.
  • Patent number: 5030359
    Abstract: Fats and proteins in wastewater are commonly concentrated in a dissolved air flotation cell as a sludge ("skimmings") which has a very high water content, even after centrifuging or the like. A process is provided to reduce the water content of the sludge thereby reducing the cost of disposal of the sludge.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: July 9, 1991
    Assignee: FMC Corporation
    Inventors: Harry M. Castrantas, Frank E. Caropreso
  • Patent number: 5011572
    Abstract: A process is provided for a two-stage oxygen delignification of chemical pulp in which 0.01% to 1% hydrogen peroxide is incorporated into the first and, optionally the second stage. The invention is particularly suitable when the pulp is subsequently bleached with at least one chlorine dioxide stage and at least one hydrogen peroxide stage.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: April 30, 1991
    Assignees: FMC Corporation, North Carolina State University
    Inventors: V. R. Parthasarathy, Meenaksi Sundaram, Hasan Jameel, Josef S. Gratzl, Ronald J. Klein
  • Patent number: 4992496
    Abstract: It was unexpectedly found that a brominated phosphate ester, tris(2,4-dibromophenyl)phosphate when employed in flame retardant quantities in a modified polyphenylene oxide resin resulted in discoloration of the resin on aging. Neither phosphate esters, flame retardants nor brominated flame retardants when employed separately as flame retardants caused similar discoloration. The use of epoxy compounds counteracted this color stability problem.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: February 12, 1991
    Assignee: FMC Corporation
    Inventor: Joseph Green
  • Patent number: 4981615
    Abstract: A novel process is provided for producing a pure triaryl phosphate ester free from phenolics without creating an undesirable waste product. After recovery of the triaryl phosphate ester the reactio mixture residue is converted into an emulsion suitable for use as a flame retardant useful for application to carpets.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: January 1, 1991
    Assignee: FMC Corporation
    Inventor: Louis T. Gunkel
  • Patent number: 4981662
    Abstract: A stable hydrogen peroxide composition is provided of from 1% to 52% by weight hydrogen peroxide and 1,10-phenanthroline. The composition may contain other conventional additives suitable for stabilizing hydrogen peroxide.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: January 1, 1991
    Assignee: FMC Corporation
    Inventor: Edward F. Dougherty
  • Patent number: 4970058
    Abstract: A novel composition of matter is claimed comprising particles which appear to comprise sodium carbonate, sodium percarbonate (also called sodium carbonate peroxide or sodium carbonate perhydrate), and a stabilizer for the compound, preferably a diphosphonic acid, the sodium carbonate being present in sufficient quantity to form sodium carbonate monohydrate by reacting with the available water in the composition.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: November 13, 1990
    Assignee: FMC Corporation
    Inventors: William A. Hills, Henry A. Pfeffer
  • Patent number: 4970019
    Abstract: A manufacturing process and composition is claimed for a composition of matter comprising sodium carbonate, sodium carbonate perhydrate, a fluorescent whitening agent and a diphosphonic acid. The process comprises incorporating the fluorescent whitening agent and diphosphonic acid into aqueous hydrogen peroxide, uniformly applying the hydrogen peroxide solution to particulate sodium carbonate to form a reaction mixture, urging water vapor from the surface of the reaction mixture and maintaining the temperature of the reaction mixture between about 35.degree. C. and 80.degree. C.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: November 13, 1990
    Assignee: FMC Corporation
    Inventors: John Crosby, Joseph C. Richards
  • Patent number: 4935391
    Abstract: A process is provided for purifying finely divided minerals contacting organic material sufficiently to make the minerals useful for coating a filling paper or for use as catalysts, catalyst supports or the like. The process comprises concomitantly contacting an aqueous slurry of the mineral with a peroxygen and a gas containing ozone at a pH from 5 to 12. Preferably, the peroxygen is incorporated into the slurry prior to contacting the slurry with a gas containing ozone. Optionally, the slurry may be pretreated with a chelating agent or subsequently bleached with a reducing agent.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: June 19, 1990
    Assignee: FMC Corporation
    Inventors: Frank E. Caropreso, Harry M. Castrantas, J. Miller Byne
  • Patent number: 4824609
    Abstract: A process is provided to remove inert contaminants from a working compound employed for the manufacture of hydrogen peroxide by the reduction and oxidation of a solution of alkylated anthraquinones and derivatives. The contaminants are removed by the process of contacting the working compound, a solvent, and carbon dioxide to form a first portion and a residue portion, separating the two portions and recovering the purified working solution from the first portion.
    Type: Grant
    Filed: January 7, 1988
    Date of Patent: April 25, 1989
    Assignee: FMC Corporation
    Inventor: Dalbir S. Sethi
  • Patent number: 4701464
    Abstract: Insecticidal compounds of the formula ##STR1## formulations thereof, their use for control of foliar or soil-borne insects, their method of preparation and certain novel intermediates for their preparation are disclosed and exemplified.
    Type: Grant
    Filed: June 3, 1985
    Date of Patent: October 20, 1987
    Assignee: FMC Corporation
    Inventors: Richard B. Phillips, Ernest L. Plummer, John F. Engel
  • Patent number: 4668436
    Abstract: A process is provided to regenerate and purify a working solution for the manufacture of hydrogen peroxide by the reduction and oxidation of a solution of alkylated anthraquinones and derivatives. The regeneration and purification is effected by removing inerts by contacting the working solution and an noncyclic hydrocarbon to form a liquid first phase and a second phase, separating the two phases and recovering both the noncyclic hydrocarbon and the purified working solution by distillation.
    Type: Grant
    Filed: December 13, 1985
    Date of Patent: May 26, 1987
    Assignee: FMC Corporation
    Inventor: Dalbir S. Sethi
  • Patent number: 4663002
    Abstract: The invention provides a process to maintain the anolyte pH within a range of 1 pH unit while manufacturing potassium peroxydiphosphate on a commercial scale. The process comprises electrolyzing an alkaline anolyte containing potassium, phosphate, and hydroxyl ions at a platinum or noble metal anode optionally in the presence of a reaction promoter. The catholyte, an alkali metal hydroxide, is separated from the anolyte by at least two separating means, one separating means permeable to either anions or cations, but not both, and the other separating means permeable to an ion excluded by the first separating means.
    Type: Grant
    Filed: July 29, 1985
    Date of Patent: May 5, 1987
    Assignee: FMC Corporation
    Inventors: John S. C. Chiang, Michael J. McCarthy
  • Patent number: 4661207
    Abstract: A problem has been identified which made it difficult, if not impossible, for the prior art to operate a reboiler in the mist flow regime. The invention which overcomes this problem is to provide a chamber to establish equilibrium between the vapor portion and the liquid portion of the reboiler effluent prior to introducing equilibrated vapor into the bottom of the distillation column. The invention is particularly useful for minimizing degradation of thermally sensitive materials.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: April 28, 1987
    Assignee: FMC Corporation
    Inventor: Andrew D. Kurtz
  • Patent number: 4645615
    Abstract: A functional fluid composition is provided suitable for high shear applications employing a major amount of a tertiary-butylphenyl/phenyl phosphate and a minor amount of a polyol ester as a base stock and a homopolymer of polystyrene having a molecular weight between 200,000 and 300,000.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: February 24, 1987
    Assignee: FMC Corporation
    Inventor: Harry N. Drake
  • Patent number: 4594170
    Abstract: The invention provides a method to liquify a heavy brine completion fluid containing chlorides. The combination of a persulfate and hydrogen peroxide was found to be more effective than either compound alone, or than a peroxygen plus an activator.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: June 10, 1986
    Assignee: FMC Corporation
    Inventors: Richard A. Brown, Robert D. Norris, Joseph C. Richards