Patents Represented by Attorney R. E. Elden
  • Patent number: 4731173
    Abstract: The present invention is a layered article of manufacture or quilt suitable to be useful to construct an electrolytic cell for manufacturing hydrogen peroxide. In use the quilt is placed upon a planar anode and the upper surface contacted with a current collector.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: March 15, 1988
    Assignee: FMC Corporation
    Inventor: John S. C. Chiang
  • 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
  • Patent number: 4590286
    Abstract: The present invention concerns a process for epoxidizing an olefin to an oxirane by forming a monopercarboxylic acid in-situ by reacting a cyclic anhydride of a polybasic acid with hydrogen peroxide in the presence of a basic catalyst and recovering the oxirane as a distillate.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: May 20, 1986
    Assignee: FMC Corporation
    Inventor: Randy A. Bull
  • Patent number: 4588506
    Abstract: The present invention is a process to stimulate the biooxidation of a contaminant in a subterranean formation by introducing an aqueous solution into the formation. The concentration of the hydrogen peroxide is increased thereby acclimating the biota to higher concentrations of hydrogen peroxide. Periodically the concentration of the hydrogen peroxide is increased for a short time sufficiently to be toxic to the biota at or relatively adjacent to the site of introduction, thereby increasing the permeability of the formation at or adjacent to the site of introduction.
    Type: Grant
    Filed: November 8, 1984
    Date of Patent: May 13, 1986
    Assignee: FMC Corporation
    Inventors: Richard L. Raymond, Richard A. Brown, Robert D. Norris, Eugene T. O'Neill
  • Patent number: 4566998
    Abstract: A working solution for producing hydrogen peroxide (made up of an anthraquinone working compound dissolved in one or more solvents) is regenerated with an alkaline, activated alumina, containing about 3.7 wt. % Na.sub.2 O at temperatures of about 145.degree. C., wherein both the oxidized and hydrogenated work solution are mixed and treated with the said alumina simultaneously on a continuous basis, so that regeneration proceeds continually and degradation products are maintained within controllable limits.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: January 28, 1986
    Assignee: Foret S.A.
    Inventors: Victor M. Ochoa, Ricardo Pueyo