From Natural Source Or Chemical Modification Thereof Patents (Class 210/730)
  • Patent number: 4451377
    Abstract: A process for cleaning oil-contaminated well bore fluids, and particulate solids. An oil-contaminated well bore fluid, or particulate solids, or both, is admixed with an aqueous polymeric solution and diatomaceous earth, and the admixture filtered to free the oil-contaminated well bore fluid, or solids, of oil which is separated therefrom. The oil-decontaminated well bore fluid is thereby rendered suitable for reuse, and residual solids useful for reblending with the original well bore fluid, or rendered environmentally acceptable for discharge.
    Type: Grant
    Filed: February 5, 1982
    Date of Patent: May 29, 1984
    Inventor: S. Roy Luxemburg
  • Patent number: 4436618
    Abstract: This specification discloses a greatly simplified method and system for recovering coal from a particulate coal bearing slurry (1) in which an appropriate hydrophobic liquid or emulsion of hydrophobic liquid in water (2) is introduced into the inlet of a centrifugal turbulent flow slurry pump (3) simultaneously with the introduction of said coal bearing slurry to said pump inlet, said hydrophobic liquid being introduced in a quantity sufficient to achieve substantially intimate contact between said hydrophobic liquid and coal particles in said slurry whereby the coal may be separated from the slurry by discharging the slurry from the pump directly over a simple static screen or other suitable separating device (4) whereupon the separated coal matter (5) may be collected for subsequent use.
    Type: Grant
    Filed: January 19, 1982
    Date of Patent: March 13, 1984
    Assignee: The Broken Hill Proprietary Company Limited
    Inventors: Geoffrey R. Rigby, Thomas G. Callcott
  • Patent number: 4415458
    Abstract: Cost effective and environmentally acceptable reagents and a method for flocculating fine particles from liquid suspensions are provided. A method for selectively flocculating fine particles from a slurry is also provided. The reagents comprise orange peel extract, corn husk extract and mixtures thereof. The method generally comprises the step of adding a reagent to a suspension of fine particles, mixing the combination of reagent and suspension and allowing the flocculated fine particles to settle out of suspension.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: November 15, 1983
    Inventor: Pearl M. Klein
  • Patent number: 4399223
    Abstract: The separation of a first cellular product comprising relatively small cells from a first liquid by centrifugal separation is facilitated by addition to the first liquid of a second cellular material comprising relatively larger cells.
    Type: Grant
    Filed: July 7, 1981
    Date of Patent: August 16, 1983
    Assignee: Phillips Petroleum Company
    Inventors: John W. Vanderveen, Donald O. Hitzman, Eugene H. Wegner
  • Patent number: 4385995
    Abstract: Method of recovering and using heretofore lost or discarded coal fines which are a product of various coal washing processes comprising coating the fine coal with a oil/water mixture, separating excess oil/water mixture, forming into particles as by rolling or tumbling and drying to recover a strong pellet suitable for shipment.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: May 31, 1983
    Inventor: Michael A. Dondelewski
  • Patent number: 4382864
    Abstract: A process for dewatering sludges, which comprises performing a first stage agitation of the sludge to be dewatered during addition of a first high molecular weight flocculant developing in an aqueous solution an electric charge in polarity opposite to that of the sludge to effect neutralization of the electric charge of the sludge, conducting subsequently a second stage agitation of the sludge during a further addition of a second high molecular weight flocculant developing in an aqueous solution an electric charge in polarity opposite to that of said first flocculant to cause flocculation of the sludge and subjecting the so flocculated sludge to a dewatering operation, wherein a flocculant composed of a natural high molecular organic compound or a derivative thereof is used for at least one of said first and second flocculants with simultaneous employment of high power agitation for said first stage agitation, which process obtain a dewatered cake having low moisture content with efficient dewatering of the
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: May 10, 1983
    Assignee: Kurita Water Industries Ltd.
    Inventors: Masanori Hashimoto, Yasuhiko Ishii, Yasuhiro Ohi
  • Patent number: 4380495
    Abstract: Spray paint overspray is collected in an aqueous bath containing a composition inclusive of finely divided clays, oils, a rubbery material in solution or suspension, and a foam suppressant; the ingredients serving to coat the paint particles converting them to a sponge-like mass which is filterable and at the same time serving to coat metal components in such fashion that paint does not become secured there to but rather may be quite readily removed.
    Type: Grant
    Filed: December 16, 1981
    Date of Patent: April 19, 1983
    Inventor: Donald R. Maher
  • Patent number: 4363733
    Abstract: A water treatment process is provided wherein water of a pH in the range of about 6 to 9 is treated with a flocculating agent, most preferably, an iron or aluminum comprising flocculating agent, and a flocculation additive comprising a heteropolysaccharide generated by the action of bacteria of the genus Xanthomonas or Arthrobacter, or fungi of the genus Sclerotium. The flocculating agent is added initially to the water, with the heteropolysaccharide comprising flocculation additive being added subsequent thereto. The process finds particular utility in the purification of potable waters.
    Type: Grant
    Filed: September 17, 1980
    Date of Patent: December 14, 1982
    Assignee: Rhone-Poulenc Industries
    Inventors: Francois Meiller, Yannick Le Du
  • Patent number: 4284509
    Abstract: After physical removal of the majority of the oil on the surface of the water, the thin film remaining is treated with microbial metabolites which reduce the surface and interface tension and cause the formation of oil agglomerates. These agglomerates may be drawn off or left to be degraded by hydrocarbon-degrading microorganisms normally present in the sea water or added thereto.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: August 18, 1981
    Assignee: Gesellschaft fur Biotechnologische Forschung
    Inventors: Walter Lindorfer, Fritz Wagner, Wilhelm Jahn-Held, Walther Schulz
  • Patent number: 4255256
    Abstract: A rapid one-step density separation method for separating and purifying whole blood into mononuclear and polymorphonuclear leucocyte and erythrocyte fractions wherein use is made of a separating medium consisting of a single aqueous solution of a high molecular weight sucrose or glucose polymer, and a water soluble metrizoate or diatrizoate compound, the density of the solution being greater than 1.095 gm/ml at room temperature and the concentration of the sucrose or glucose polymer lying in the range of 5 to 10% (based on weight/total volume of solution).
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: March 10, 1981
    Inventors: Antonio Ferrante, Yee H. Thong
  • Patent number: 4253958
    Abstract: The disclosure relates to a method of purifying aqueous media, in which the aqueous medium is treated under agitation, preferably air agitation, with a product which is prepared from lignin sulphonate, at least one cerium salt and aluminium sulphate. Use of the disclosed product for purifying aqueous media also falls within the scope of the invention.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: March 3, 1981
    Inventor: Poul A. Jodehl