Patents Represented by Attorney Frank Ianno
  • Patent number: 4664896
    Abstract: In the process of purifying yellow phosphorus by treating liquid yellow phosphorus with active carbon and separating the purified phosphorus from the spent active carbon containing adhering phosphorus, the spent active carbon is mixed with sufficient liquid phosphorus to form a slurry which is pumped to a disposal zone. The disposal zone is preferably a phosphorus furnace.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: May 12, 1987
    Assignee: FMC Corporation
    Inventor: Richard E. Hall
  • Patent number: 4656019
    Abstract: The concentration of Phase II sodium tripolyphosphate in the sodium tripolyphosphate produced by spray drying a feed liquor comprising sodium orthophosphate, sodium pyrophosphate or mixture thereof, is increased to at least 90% by weight of sodium tripolyphosphate product, by seeding the feed liquor with Phase II material. Phase II yield is further increased by introducing with the feed liquor, in addition to the Phase II seed material, a minor amount of sodium sulfate. Hydrolysis of the Phase II seed is minimized by concentrating the Phase II seed in feed liquor in a separate feed tank at a lower temperature than the main feed line. Dispersing the Phase II seed in water, a dilute soda ash solution or an inert organic liquid and then injecting the dispersion into the feed liquor into the spray dryer promotes good contact between the seed and feed.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: April 7, 1987
    Assignee: FMC Corporation
    Inventors: Paul L. Hensler, Frederick J. Kelso, Gary E. Wolfe, Peter H. Zeh
  • Patent number: 4602917
    Abstract: Formcoke is produced by separately introducing feedstocks of calcined coal particles, bituminous binder and a carbohydrate, preferably an aqueous sugar, into a mixing zone. The resulting mixture is compacted into shapes, such as briquettes, which are then cured in an oxygen-containing atmosphere and optionally heated to coking temperatures.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: July 29, 1986
    Assignee: FMC Corporation
    Inventors: Joseph H. Finley, Richard R. Severns, Robert M. Zakotnik
  • Patent number: 4597889
    Abstract: A stable, homogeneous, aqueous detergent slurry is described containing polymeric acrylic stabilizers. The slurry contains about 14 weight percent to about 30 weight percent of a sodium polyphosphate, 0 to about 1 weight percent of sodium carboxymethylcellulose, 0 to about 5 weight percent of a compatible inorganic alkali metal hydroxide or salt as a viscosity modifier, a soluble nonionic surface-active agent in amounts of from about 13 weight percent to about 20 weight percent, a stabilizing amount ranging from about 0.4 to about 2 weight percent of a high molecular weight polymer of an acrylic acid, and wherein said sodium polyphosphate is present in part as insoluble particles having an average diameter of about 1 to about 10 microns.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: July 1, 1986
    Assignee: FMC Corporation
    Inventors: Charles E. Jones, Bette-Jean Brabant
  • Patent number: 4595492
    Abstract: Process for recovery of elemental phosphorus from phosphorus sludge produced in a phosphorus furnace by treating the sludge in a centrifugal separator and separating a fine dirt slimes fraction from a recovered heavy fraction containing the major portion of phosphorus; treating the slimes fraction in hydrocyclones not over one inch (24.4 mm) in diameter to separate two streams, a first phosphorus-poor stream containing particles smaller than 8-15 micrometers, and a second phosphorus-rich stream containing particles larger than 8-15 micrometers; recycling the second, phosphorus-rich stream to the centrifugal separator for phosphorus recovery, and discarding the first, phosphorus-poor stream.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: June 17, 1986
    Assignee: FMC Corporation
    Inventors: David A. Crea, James A. Robertson, Jerry A. Keely
  • Patent number: 4590051
    Abstract: In the manufacture of sodium tripolyphosphate, the make up liquor containing the requisite sodium and phosphorus values, is treated with from about 0.01 to 0.1 weight percent of hydrogen peroxide before the liquor is heated to form sodium tripolyphosphate. The hydrogen peroxide treatment prevents dark oily impurities from forming on the surface of aqueous solutions of the sodium tripolyphosphate thus treated.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: May 20, 1986
    Assignee: FMC Corporation
    Inventor: Lawrence A. Shimp
  • Patent number: 4578088
    Abstract: An electrical insulating and sealing apparatus, and process of using same, is described for use in an electrostatic precipitator. The apparatus employs a flexible insulator seal through which passes an electrical lead-in conductor with rubber boots to seal the insulator seal against gas leakage. Also provided are a manifold and venturi section surrounding the insulator seal to permit a pressurized gas to impinge on the insulator seal and flow downwardly over the seal through the venturi section at increased speed to help clean and keep clean the surface of the insulator seal.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: March 25, 1986
    Assignee: FMC Corporation
    Inventor: Denver D. Linscheid
  • Patent number: 4575403
    Abstract: A continuous process for reducing the arsenic content of phosphorus is described in which the impure phosphorus is continually passed through a heat exchanger and heated to vaporize a portion of the phosphorus at a temperature not above 200.degree. C., separating the vaporized phosphorus in a disengaging zone under subatmospheric pressure and introducing it into a fractionating zone under subatmospheric pressure, fractionating the phosphorus from the less volatile arsenic, condensing under subatmospheric pressure low-arsenic phosphorus rising from the fractionating zone, returning a portion of the low-arsenic phosphorus condensate as reflux to the column, removing high-arsenic liquid phosphorus as bottoms from the fractionating zone, and recovering the remaining portion of low-arsenic phosphorus condensate as product.
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: March 11, 1986
    Assignee: FMC Corporation
    Inventors: Harvey Rosenhouse, Jeffrey C. Dore
  • Patent number: 4574076
    Abstract: A process for removing hydrogen sulfide from saturated steam is described whereby the steam and hydrogen sulfide entrained therein are contacted under conditions of turbulent flow with hydrogen peroxide. The effectiveness of the process is improved by simultaneously contacting the steam with a basic reagent such as sodium hydroxide.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: March 4, 1986
    Assignee: FMC Corporation
    Inventor: Harry M. Castrantas
  • Patent number: 4551320
    Abstract: The calcium content of high purity concentrated phosphoric acid is reduced to not more than about 2 ppm by contacting the acid with a strong cation exchange resin.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: November 5, 1985
    Assignee: FMC Corporation
    Inventors: Frank J. Dominiani, Jr., Dennis C. Annarelli
  • Patent number: 4544494
    Abstract: A stable, homogeneous, aqueous detergent slurry is described containing an amphoteric surface-active agent. The slurry contains about 14 weight percent to 30 weight percent of a sodium polyphosphate, about 1 weight percent to 5 weight percent of an alkali metal hydroxide or alkali metal salt, a soluble anionic surface-active agent, about 0.5 to 5 weight percent of an amphoteric surface-active agent which is selected from the group consisting of N-coco .beta.-amino propionic acid; N-lauryl-, myristyl .beta.-amino propionic acid; disodium N-tallow .beta.-iminodipropionate; N-coco .beta.-amino butyric acid; and coco betaine, wherein sodium polyphosphate is present as insoluble particles having an average diameter of about 1 to about 10 microns, and the total amount of surface-active agents are from 13 weight percent to 20 weight percent.
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: October 1, 1985
    Assignee: FMC Corporation
    Inventors: Gale D. Downey, Charles E. Jones
  • Patent number: 4537708
    Abstract: A stable, homogeneous, aqueous detergent slurry is described containing nonionic surface-active agents. The slurry contains about 14 weight percent to 30 weight percent of a sodium polyphoshate, about 1 weight percent to 5 weight percent of an alkali metal hydroxide or alkali metal salt, a soluble anionic surface-active agent, a soluble nonionic surface-active agent which is an alcohol alkoxylate having an HLB value of 4 to 9, wherein sodium polyphosphate is present as insoluble particles having an average diameter of about 1 to about 10 microns, the anionic and nonionic surface-active agents are present in a weight ratio of about 6.7:1 to 1.35:1, and the total amount of surface-active agents are from 13 weight percent to 20 weight percent.
    Type: Grant
    Filed: August 30, 1983
    Date of Patent: August 27, 1985
    Assignee: FMC Corporation
    Inventors: Gale D. Downey, Charles E. Jones
  • Patent number: 4536377
    Abstract: A one step spray drying process for making high assay sodium tripolyphosphate having a high concentration of form I material by spray drying an aqueous sodium orthophosphate feed liquor having an Na.sub.2 O:P.sub.2 O.sub.5 ratio of 1.60 to 1.70 at a temperature between 250.degree. and 420.degree. C. for up to one minute to produce sodium tripolyphosphate and cooling the product to 150.degree. C. or below in twenty minutes or less.
    Type: Grant
    Filed: August 8, 1984
    Date of Patent: August 20, 1985
    Assignee: FMC Corporation
    Inventor: Lawrence A. Shimp
  • Patent number: 4532065
    Abstract: Cleansing compositions useful in cleaning anodized aluminum contain a detergent builder, a detergent agent and a soluble salt of a transition metal. The presence of the transition metal ion protects the anodized coating from attack by the detergent builder.
    Type: Grant
    Filed: June 5, 1981
    Date of Patent: July 30, 1985
    Assignee: FMC Corporation
    Inventors: Leon E. Cohen, John A. Hook
  • Patent number: 4526603
    Abstract: The dusting and segregation of the glass batch during the manufacture of opal borosilicate glass can be reduced by adding the phosphorus values to the glass batch as phosphoric acid, and calcium values as limestone, calcium carbonate or calcium oxide.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: July 2, 1985
    Assignee: FMC Corporation
    Inventors: Richard L. Lehman, William H. Manring
  • Patent number: 4526762
    Abstract: Vanadium is recovered from acidic solutions by oxidizing the vanadium with Caro's acid to the pentavalent state and obtaining the oxidized vanadium by solvent extraction.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: July 2, 1985
    Assignee: FMC Corporation
    Inventor: Richard A. Brown
  • Patent number: 4521316
    Abstract: A well-treating fluid of high density, solids-free and corrosion-resistance is formed comprising an aqueous solution of at least 50% by weight tetrapotassium pyrophosphate and a salt which can be either monopotassium orthophosphate, dipotassium orthophosphate or tripotassium orthophosphate, or mixtures thereof, wherein the salt is present in amounts sufficient to yield a predetermined pH in said fluid of about 8.5 to about 12, a predetermined specific gravity of at least about 1.65, and has high resistance to recrystallization of its solutes.
    Type: Grant
    Filed: March 11, 1983
    Date of Patent: June 4, 1985
    Assignee: FMC Corporation
    Inventor: Charles F. Sikorski
  • Patent number: 4492627
    Abstract: Process for recovery of elemental phosphorus from waste ponds by dredging the waste pond to obtain an aqueous phosphorus slurry, separating particles larger than 2 mm from the slurry, treating the remaining slurry in an initial hydrocyclone and removing an overflow of solids larger than 500 micrometers, treating the underflow from the initial hydrocyclones in smaller diameter hydrocyclones, removing a second overflow enriched in slimes and diminished in phosphorus, removing a second underflow enriched in phosphorus and diminished in slimes and heating it sufficiently to melt the phosphorus therein, treating the heated second underflow in a centrifugal separator, and separating and recovering a stream of coalesced phosphorus from a heavy fraction of impurities.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: January 8, 1985
    Assignee: FMC Corporation
    Inventor: David A. Crea
  • Patent number: 4483746
    Abstract: A continuous process for reducing the arsenic content of phosphorus is described in which the impure phosphorus is continually passed through a heat exchanger and heated to vaporize a portion of the phosphorus at a temperature not above 200.degree. C., separating the vaporized phosphorus in a disengaging zone under subatmospheric pressure and introducing it into a fractionating zone under subatmospheric pressure, fractionating the phosphorus from the less volatile arsenic, condensing under subatmospheric pressure low-arsenic phosphorus rising from the fractionating zone, returning a portion of the low-arsenic phosphorus condensate as reflux to the column, removing high-arsenic liquid phosphorus as bottoms from the fractionating zone, and recovering the remaining portion of low-arsenic phosphorus condensate as product.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: November 20, 1984
    Assignee: FMC Corporation
    Inventors: Harvey Rosenhouse, Jeffrey C. Dore
  • Patent number: 4462973
    Abstract: Liquid phosphorus as produced by the reduction of a phosphate ore in an electric arc furnace while of high purity contains color-causing impurities that impart to the phosphorus a black color by reflected light. Such liquid phosphorus is polished or refined to exhibit a yellow or yellow brown cast by mixing it with hot water and subjecting the mixture to intense agitation. The refined phosphorus is separated from the water phase which retains the impurities.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: July 31, 1984
    Assignee: FMC Corporation
    Inventors: David A. Crea, Jerry A. Keely