Bentonite Patents (Class 106/DIG4)
  • Patent number: 6083318
    Abstract: A lightweight, cementitious composition and method which includes a noncementitious filler, Portland cement, bentonite, diataomaceous earth and lime. The noncementitious filler may be sawdust, rubber chips, flyash or combinations of two or more of these ingredients. Once mixed with water and air, the composition can be molded to form a variety of structures, including electrically nonconductive posts, and can be used to absorb and contain liquid contaminants in a vessel.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: July 4, 2000
    Inventors: Joseph M. Zawada, Sandra K. Zawada
  • Patent number: 6074473
    Abstract: The present invention provides a high solids slurry and a method for producing the same. Specifically, the present invention provides a talc slurry having a solids content of at least about 58% and a viscosity of less than about 500 centipoise. The talc slurry of the present invention comprises talc, a salt and a base.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: June 13, 2000
    Assignee: Luzenac America, Inc.
    Inventors: Carl W. Nichols, Robert G. Cooner
  • Patent number: 6024790
    Abstract: Alkaline earth bentonite can be activated by the use of sodium citrate or other organic sequestering agent as activator. Dry blends of the activator and the bentonite can be provided.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: February 15, 2000
    Assignee: Ciba Specialty Chemicals Water Treatments Limited
    Inventors: Adrian Swinburn Allen, John Oliver Stockwell, Ian James Black
  • Patent number: 5972263
    Abstract: A method of improving the strength and/or plasticity of a clay composition comprising a kandite clay and an organic additive comprising at least one water soluble compound having a plurality of basic groups wherein the organic additive is present in an amount of from about 0.05% by weight to about 0.5% by weight based on the dry weight of the kandite clay present, which method comprises treating the kandite clay by adding thereto a monovalent ion activated smectite clay or a monovalent ion activating agent for a smectite clay or both whereby the amount of monovalent ion activated non-calcined smectite clay present in the clay composition is adjusted to be in the range from about 1% by weight to about 5% by weight based upon the dry weight of the kandite clay present.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: October 26, 1999
    Assignee: ECC International Ltd.
    Inventors: Howard Goodman, Christopher Stirling Hogg, Richard Gerrard Shaw Stewart
  • Patent number: 5948156
    Abstract: A supplementing agent for mineral binder systems is disclosed, especially for the construction industry, containing at least 1 finely divided, swellable layer silicate and possible at least 1 other additive, the proportion of the swellable layer silicate being more than 60 wt. % and the swelling volume of the layer silicate being around 5-50 ml, in terms of a suspension of 2 g layer silicate in 100 ml water.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: September 7, 1999
    Assignee: Sud-Chemie, AG
    Inventors: Helmut Coutelle, Klaus Dziwok
  • Patent number: 5814572
    Abstract: An object of the present invention is to provide a glassy sintered body and to effectively reuse scrapped glass.The glassy sintered body of the present invention is made by preparing a raw material of the body by adding ceramic clay to glass as a main element so as to adjust the amount of water and kneading the glass and the clay, forming the raw material into a prescribed form, and sintering the formed material.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: September 29, 1998
    Assignee: Crystal Clay Corporation
    Inventors: Kazuo Saiki, Masami Kato, Kokichi Hanaoka
  • Patent number: 5779785
    Abstract: An aqueous slurry of smectite clay of elevated solids content, comprising an aqueous solution or emulsion of at least 0.2% by weight of said slurry of a salt of a low molecular weight amine salt, in which is dispersed from about 10 to 47% by weight of the slurry, of a smectite clay. The amine salt is effective to prevent the smectite from swelling appreciably, whereby the slurry can be shipped and stored without creating a gelling problem. The inhibiting or suppressing effect of the amine salt on the swelling of the clay and on gelling of the slurry is reversible upon subsequent dilution with water, thereby facilitating use of the smectite in typical applications, e.g. as a retention aid in paper making, or as a viscosifier.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: July 14, 1998
    Assignee: Vinings Industries, Inc.
    Inventors: James Payton, Nicholas Canaris, Jorge Miranda
  • Patent number: 5769938
    Abstract: To treat waste containing harmful netals such as lead, cadmium, mercury, chromium, copper, nickel, zinc, etc., the waste is mixed with a treating agent containing, as the essential constituent component, solid acid(s) and/or cement and additionally a caking inhibitor, kneaded with water where necessary, then solidified by curing. Harmful metals are thereby stabilized in the thus-solidified cakes and are not released therefrom.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: June 23, 1998
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kenji Ueshima, Noboru Ikitsu, Takuji Nomura, Takashi Funahashi, Masakazu Uekita
  • Patent number: 5707912
    Abstract: Clay materials, such as kaolin, containing expandable layer-silicates are chemically treated with a source of magnesium cations, followed by a pH adjustment, to provide a slurry product having improved rheological properties.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: January 13, 1998
    Assignee: Thiele Kaolin Company
    Inventors: Robert A. Lowe, Prakash B. Malla
  • Patent number: 5700319
    Abstract: Unusually high loading levels of smectite minerals are found to provide excellent pigment spacing in aqueous-based coatings, as will enable desired improved hiding, thereby extending the pigment. The level of smectite used in accordance with the invention is sufficiently high that the high gelling efficiency smectites previously used as thixotropes would be inappropriate, and would yield viscosities so high as to render the aqueous coating composition lacking in desired flowability properties. Thus in accordance with the present invention, there is mixed with the aqueous carrier and pigment at least 0.5% by weight of the total composition, of a particulate water swellable smectite which has a gelling efficiency such as to display a 20 rpm Brookfield viscosity of less than 900 cps when subjected to the standard gelling test herein, with the amount of the smectite in the composition not exceeding that which would raise the viscosity of the composition above 110 Krebs Units (KU).
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: December 23, 1997
    Assignee: Southern Clay Products, Inc.
    Inventors: Carl J. Bauer, Benjamin W. Knesek
  • Patent number: 5650004
    Abstract: There is disclosed a cement plaster composition wherein an additive having from about 10% to about 75% of a silicone treated powder and from about 90% to about 25% of a pozzalanic filler is combined with a type I Portland cement and a crushed aggregate to form a water repellent coating for plastering a swimming pool surface. The additive may also include rheology modifiers, water reducing agents, or set time modifiers.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: July 22, 1997
    Inventor: Michael D. Yon
  • Patent number: 5637144
    Abstract: An asbestos replacement is disclosed which includes water retention agents and finely divided mineral clays with high moisture retention capabilities. Combining the aforementioned ingredients in the correct proportions yields properties as those of asbestos when used in cementitious mortar compositions.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: June 10, 1997
    Inventors: Burton K. Whatcott, Lynn G. Bigelow
  • Patent number: 5622553
    Abstract: A substance for increasing friction between two surfaces such as two metallic surfaces has a gel base material determining the viscosity of the substance and contains hard crystals mixed into the gel based material. A plurality of the hard crystals is comprised of a first particles of the first substantially identical particle size and second particles of the second substantially identical particle size. The first and second particle sizes have a fixed ratio relative to one another.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: April 22, 1997
    Inventors: Bernhard Jakob, Michael Klemm
  • Patent number: 5583079
    Abstract: A ceramic kiln-fired product which comprises glass, fly ash, and a clay binder. Further provided is a method for preparing raw material suitable for forming a shaped, kiln-fired, ceramic product. The method comprises mixing glass, fly ash, and a clay binder with from about 10 wt. % to about 15 wt. % water, on a dry weight basis, to form an aqueous mixture, separating the aqueous mixture using a mesh of from about 10 to about 12 screen into first and second portions, the first portion comprising the aqueous mixture which does not pass through the mesh and the second portion comprising the aqueous mixture which passes through the mesh, and drying the second portion until the moisture content of the second portion is less than about 0.5 wt. % to form the raw material. The present invention also provides a tile glazing formulation which may be used with the ceramic product of the present invention, as well as a method of using the formulation. The glazing formulation comprises, on a dry weight basis, about 70 wt.
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: December 10, 1996
    Inventors: John T. Golitz, John F. Mainieri, Bruce H. Bennett, Richard D. Moore, Angela M. Paxton
  • Patent number: 5551975
    Abstract: Pigments for use in paper are comprised of structured aggregate clays which are reaction products of kaolin clays and colloidal silicas. Silica modified clays of low treatment level can under certain high-shear mixing conditions be attritioned back to their starting clay particle size consequently yielding silica coated clay particles that provide unique properties. Also provided are structured aggregate clay products produced by the reaction of kaolin clay, colloidal silicas and spacer particles such as titanium dioxide, which products have improved porosity and light scattering characteristics. Also provided are clay slurry products which comprise mixtures of the reaction product of kaolin clay and colloidal silica, and optionally titanium dioxide, blended with other clay products.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: September 3, 1996
    Assignee: J. M. Huber Corporation
    Inventors: Gary M. Freeman, Kurt H. Moller, Richard D. Carter
  • Patent number: 5547506
    Abstract: In the method of the invention, a storable hydraulically-active cementitious slurry is made and used to cement within subterranean foundations for oil and gas wells. The slurry is made from hydraulically-active, cementitious material suitable for oil field purposes and can be stored until needed. During storage, the slurry remains liquid. The slurry is activated when needed for cementing. After pumping the activated slurry into the wellbore, the set cement has properties acceptable for well cementing.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: August 20, 1996
    Assignee: BJ Services Company
    Inventors: Philip Rae, Neil Johnston
  • Patent number: 5529622
    Abstract: A process is disclosed for the production of a blended smectite clay with enhanced rheology, particle size restriction and reduced abrasion characteristics which is useful for the coating of paper. The process comprises slurrying of a predominantly sodium smectite clay, slurrying a predominantly calcium smectite clay, degritting of the clay slurries to remove coarse grained impurities, removing a substantial portion of the undesirable soluble salts from the clay slurries, fractionating the clay slurries to control particle size of the smectite clays in the slurry and blending together the predominantly sodium smectite clay slurry with the predominantly calcium smectite clay slurry to form a blended clay slurry.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: June 25, 1996
    Assignee: United Catalysts Inc.
    Inventor: Thomas D. Thompson
  • Patent number: 5520728
    Abstract: The invention relates to the use of water-containing organophilic phyllosilicates obtained by the reaction of a phyllosilicate, which is completely delaminated colloidally in water and is capable of cation exchange, with an organic onium salt in aqueous suspension and subsequent mechanical removal of the water, without drying by heating, as a rheological additive in organic media.The water-containing organophilic phyllosilicates are particularly suitable for coating paper.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: May 28, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Guido Dessauer, Ute Horn
  • Patent number: 5512096
    Abstract: A grouting composition for sealing boreholes or other cavities comprising 90.0-99.99% water swellable clay and 0.01-10.0% gelling agent. The grouting composition is mixed with fresh water to provide an easily placed, low cost, low permeability sealing composition. A preferred grouting composition contains 98-99% sodium bentonite and 1-2% cement. In use 50 pounds of the preferred grouting composition is mixed with 27-38 gallons of fresh water to produce a grouting composition containing 13.7-18.2% solids and having a fluid density equal to or greater than 9.0 lbs/gallon with a Marsh funnel viscosity equal to or greater than 50 seconds.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: April 30, 1996
    Assignee: Wyo-Ben, Inc.
    Inventor: Stewart W. Krause
  • Patent number: 5482550
    Abstract: The present application is directed to a structural building unit formed from a set solid mixture consisting essentially of about 30% to about 75% by weight portland cement, about 1% to about 25% by weight percent ground expanded cellular polystyrene, about 1% to about 35% by weight ground cellulosic fiber, about 2% to about 15% by weight fly ash, about 1% to about 10% by weight silica fume, about 1% to about 15% by weight bentonite, about 25% to about 50% by weight water, about 0% to about 3% by weight air entrainer, about 0% to about 10% by weight paraffin wax emulsion and about 0% to about 15% by weight rubber emulsion.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: January 9, 1996
    Inventor: Mark C. Strait
  • Patent number: 5464473
    Abstract: A backfill for an engineered barrier used to contain radioactive waste has a predetermined amount of clayic material and a predetermined amount of a reinforcement material with hydrophobic surface characteristics. The reinforcement material may include hydrophobic compounds selected from group consisting of organic polymers or inorganic materials on which a layer of hydrophobic compounds is formed. The hydrophobic reinforcement material results in the backfill maintaining a very low water permeability while providing high mechanical strength and other properties suitable for use in a repository of radioactive waste.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: November 7, 1995
    Assignee: Chao Ming Tsai
    Inventor: Shin J. Shiao
  • Patent number: 5407480
    Abstract: An aqueous slurry of smectite clay of elevated solids content, comprising an aqueous solution or emulsion of from about 0.5 to about 13% by weight of said slurry of a salt of a low molecular weight amine salt, in which is dispersed from about 10 to 47% by weight of the slurry, of a smectite clay. The amine salt is effective to prevent the smectite from swelling appreciably, whereby the slurry can be shipped and stored without creating a gelling problem. The inhibiting or suppressing effect of the amine salt on the swelling of the clay and on gelling of the slurry is reversible upon subsequent dilution with water, thereby facilitating use of the smectite in typical applications, e.g. as a retention aid in paper making, or as a viscosifier.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: April 18, 1995
    Assignee: Vinings Industries, Inc.
    Inventors: James Payton, Nicholas Canaris, Jorge Miranda
  • Patent number: 5401312
    Abstract: Abstract A method for stabilizing the upper layers of the earth's surface is claimed that comprises the steps of: mixing an amount of lime with an amount of water, simultaneously or sequentially mixing an amount of fly ash with the lime/water mix to form a slurry, distributing said slurry onto the earth's surface and working said slurry into the upper layers of the earth's surface.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: March 28, 1995
    Inventor: Donald R. Hanst
  • Patent number: 5395441
    Abstract: An iron making blast furnace revert briquette composition including finishing mill scale, steelmaking slag, blast furnace dust and a binder wherein the binder includes Portland cement, granulated blast furnace slag cement or mixtures thereof and bentonite. The bentonite improves the cold and hot strength of the briquette.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: March 7, 1995
    Assignee: USX Corporation
    Inventors: Eugene A. Bogdan, Richard L. Cole
  • Patent number: 5391228
    Abstract: A method for preparing a time-stable, low viscosity, pumpable high solids aqueous bentonite slurry which has good application properties upon dilution and use. An aqueous solution of at least first and second salt components is prepared in which there is dispersed at least 8% by weight of the resultant slurry of a powdered bentonite. The first salt component is selected to give if used alone an acceptably low viscosity to the slurry at said high solids and at least good application properties upon the dilution and use. The second salt component is selected to act in combination with the first salt component to substantially further decrease the acceptably low viscosity at a specified high solids content or to enable increase of the solids content while maintaining the acceptably low viscosity, while not substantially impairing the application properties. The high solids pumpable slurry product is also claimed.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: February 21, 1995
    Assignee: Southern Clay Products, Inc.
    Inventor: Paul W. Carroll
  • Patent number: 5389146
    Abstract: A grouting composition comprised of (a) 84-95 % by weight of granular water-swellable sodium-based bentonite, (b) 1-8 % by weight of finely divided salt-water hydratable sepiolite, and (c) 4-8% by weight of a clay stabilizer. The grout composition which contains no organic polymeric substances is mixed with fresh water to provide a pumpable, rehydratable, and easily applied grouting slurry. The slurry admixture will form a solid seal with low hydraulic conductivity and high structural stability. The grouting composition is useful for sealing the annular space around a well casing and plugging abandoned wells in practically all types of formations. A preferred grouting compostion comprises 88-90% by weight of granular sodium bentonite, 6-7% by weight of sepiolite, and 4-5% by weight of granular ammonium sulfate.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: February 14, 1995
    Assignee: Baroid Technology, Inc.
    Inventor: Andrew W. Liao
  • Patent number: 5376604
    Abstract: There are disclosed an organophilic clay which comprises a hydroxypolyoxyethylenealkyl ammonium ion represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different, and each represent a (CH.sub.2 CH.sub.2 O).sub.n H group (where n is 2 or more, preferably 2 to 20), a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, provided that one to three of R.sub.1 to R.sub.4 is/are a (CH.sub.2 CH.sub.2 O).sub.n H group(s) and at least three of R.sub.1 to R.sub.4 are (CH.sub.2 CH.sub.2 O).sub.n H group(s) and alkyl group(s),being introduced in interlayers of an expandable layer silicate, a method for preparing the same and a gellant for a high polar organic solvent.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: December 27, 1994
    Assignees: CO-OP Chemical Co., Ltd., Director General of The Agency of Industrial Science and Technology Shunso Ishihara
    Inventors: Takashi Iwasaki, Hiromichi Hayashi, Kazuo Torii, Takahiro Sekimoto, Toshikazu Fujisaki, Motoyuki Ikegami, Yutaro Ishida
  • Patent number: 5376283
    Abstract: A fixant for fixing toxic organic compounds comprised in waste material comprising an inorganic binder based on calcium compounds mixed with an alumino silicate, and at least one metal sulphate which fixes said organic compounds and counteracts leaching, is disclosed. Preferably a combination of several metal sulphates, especially aluminum sulphate, manganese sulphate and ferric sulphate is used. Moreover, the fixant preferably comprises an organo-clay compound, in particular a bentonite, a montmorillonite and a hectorite.A process of treating waste material comprising toxic organic compounds by mixing said waste material with said fixant, as well as a matrix formed from at least a set inorganic binder based on a cement and a silicate with environmentally harmful organic compounds containing waste material encapsulated therein, said matrix also comprising at least one metal sulphate which fixes said organic compounds and counteracts leaching is disclosed.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: December 27, 1994
    Assignee: Pelt & Hooykaas B.V.
    Inventor: Carel W. J. Hooykaas
  • Patent number: 5298064
    Abstract: The invention relates to the use of water-containing organophilic phyllosilicates obtained by the reaction of a phyllosilicate, which is completely delaminated colloidally in water and is capable of cation exchange, with an organic onium salt in aqueous suspension and subsequent mechanical removal of the water, without drying by heating, as a rheological additive in organic media. The water-containing organophilic phyllosilicates are particularly suitable for coating paper.
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: March 29, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Guido Dessauer, Ute Horn
  • Patent number: 5266538
    Abstract: A smectite clay is provided as an elevated solids aqueous slurry e.g. up to 50% solids, which is composed of the smectite clay slurried or dispersed in water containing an effective concentration of a monovalent salt. When such a salt is present in the clay slurry, the clay does not swell appreciably, is essentially inactive, and the slurry can be shipped and stored without creating a gelling problem. When this slurry is diluted with fresh water at the point of application to make it of the desired solids content for use, the smectite clay is activated and exhibits the desired properties, such as viscosity, retention, etc.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: November 30, 1993
    Assignee: Southern Clay Products, Inc.
    Inventors: Milburn I. Knudson, Paul Carroll, David J. Hanlon, William R. Menking, Patricia M. Lewis
  • Patent number: 5215582
    Abstract: A water-base aerosol coating composition, for application to a surface to be coated from a pre-packaged pressurized spray container, which contains greater than 10 Wt. % and up to about 25 Wt. % of a water dispersible acrylic modified alkyd resin, from about 0.4 to about 0.6 Wt. % of an amine neutralizing agent, less than 0.45 Wt. % of an organophilic clay dispersing agent, and from about 0.1 to about 0.5 Wt. % of an organic rheological agent. The formulation also includes from about 11 to about 17 Wt. % of a first solvent comprising glycol ether, from about 14 to about 18.5 Wt. % of a second solvent comprising water, and from about 38 to about 42 Wt. % of a cosolvent propellant comprising dimethyl ether. From about 1.17 Wt. % to less than 2.46 Wt. % of a barium metaborate monohydrate corrosion inhibitor is included, and an antiblock function is provided by including more than 0.3 wt.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: June 1, 1993
    Assignee: United Coatings, Inc.
    Inventors: Gary L. Bolt, Bruce R. Brouillette
  • Patent number: 5158609
    Abstract: An improved water based aerosol paint is particularly well-suited for use in site marking applications. Its high content of calcium carbonate provides a support for the pigment and resin film. A straight chain, low molecular weight hydrocarbon with between 5 and 8 carbons is used to control foaming.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: October 27, 1992
    Assignee: Aervoe Pacific Company, Inc.
    Inventor: Paul J. O'Neill
  • Patent number: 5151131
    Abstract: Oil field cement liquid fluid loss control additives and methods of field preparing such additives prior to preparing a cement composition containing the additive are provided. The method of field preparing the liquid fluid loss control additive comprises admixing an organophilic clay suspending agent with a liquid hydrocarbon, combining a surfactant with the mixture and then combining at least one hydrophilic polymer with the mixture to form the additive.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: September 29, 1992
    Assignee: Halliburton Company
    Inventors: John Burkhalter, Jolinda K. Suson
  • Patent number: 5116537
    Abstract: A method of decreasing the expansion temperature and improving the expansion characteristics of vermiculite ore comprising subjecting vermiculite ore containing interlamellar cations to a potassium nitrate solution for a time interval sufficient to ion-exchange interlamellar cations within said ore with potassium ions. Subsequent to this ion exchange the low temperature expandable vermiculite may be expanded by heating in an oven, or incorporated in an intumescent material and heat expanded in situ, or expanded by other heating means. An intumescent sheet is provided which may be used for mounting automotive catalytic converter monoliths comprising an unexpanded vermiculite produced by the method of the invention; an inorganic fibrous material; and a binder.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: May 26, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Julie C. Yang, Charles I. Sanders
  • Patent number: 5116413
    Abstract: A process is provided for feeding cables, wires, pipes etc. through a wall in such a way that the water- and/or gas resistance of the wall is maintained and that later on additional cables etc. can be passed through. The process uses a sealing agent comprising an intimate mixture of a water-swellable substance such as a clay and a hydrophobic substance such as vaseline. The sealing agent can be placed in a tubular device for providing water-tightness when making a bushing in a partially porous wall.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: May 26, 1992
    Assignee: Waterproof Coatings S.A.
    Inventor: Franciscus P. M. Nooren
  • Patent number: 5114893
    Abstract: A method of treating a water-swellable clay after the clay has been mined and dried. After the common initial drying of the clay to a moisture content of 12% or less, the clay is re-wetted to a moisture content of more than 12% by weight, preferably at least about 15% or more, based on the dry weight of the clay, then redried to a moisture content of 12% by weight or less, based on the dry weight of the clay.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: May 19, 1992
    Assignee: American Colloid Company
    Inventor: John Hughes
  • Patent number: 5114892
    Abstract: A mixture of swellable clay, such as bentonite, is charged with an additive which provides an excess of single-charged cations which tend to neutralize the deleterious effects of double-charged cations which are naturally present in seawater and industrial waste. The mixture is deposited on and carried by a sheet to facilitate its uses as a pond liner or a foundation sealant.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: May 19, 1992
    Assignee: James Clem Corporation
    Inventor: Arthur J. Clem
  • Patent number: 5106418
    Abstract: The invention describes a bonding material for casting mold, which comprises from about 0.5 to about 20 mass % plant-derived lecithin, plant oil or a mixture of lecithin and plant oil, from about 0.1 to about 5.5 mass % starch, starch derivative, sodium carboxymethylcellulose or a mixture thereof, from about 0.3 to about 4.5 mass % of sodium carbonate, 0.05 to 1.25 mass % of a boron compound, and the balance to 100 % being bentonite.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: April 21, 1992
    Assignee: Hungaroben Kft.
    Inventors: Gyula Szepfoldi, Istvan Halasz, Kalman Kovaliczky, Karoly Gedey
  • Patent number: 5061397
    Abstract: There is disclosed a particulate inorganic material, suitable for use in a detergent composition, comprising base granules of a smectite clay coated with a white inorganic material. Also disclosed is a detergent composition comprising a particulate inorganic material and a process for making the particulate inorganic material.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: October 29, 1991
    Assignee: ECC International Limited
    Inventor: Howard Goodman
  • Patent number: 4939033
    Abstract: A pasty gasket (5) is placed on the upper edge (6) of a metallurgical container (1) in order to produce a leakproof seal with the cover (4) of the latter. The gasket (5) is constituted by a mixture containing from 5 to 10% by weight of plasticizing substances containing clay and/or bentonite, 90 to 95% by weight of organic particles such as paper and/or inorganic such as carbon, carbide, borides, nitrides, silicides and sulfides, alone or in combination and/or anhydrous and/or hydrated refractory oxides such as silica, alumina, chromium-magnesium oxide, magnesium oxide, chamotte and mixtures thereof, the whole being given a pasty form by approximately 20 to 30% by weight of water relative to the weight of the dry constituents, the mixture of these constituents being produced shortly before application of the gasket.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: July 3, 1990
    Assignee: Daussan et Compagnie
    Inventors: Jean C. Daussan, Gerard Daussan, Andre Daussan
  • Patent number: 4861378
    Abstract: A cement additive contains a superplasticizer, an inorganic strength increasing agent such as calcium sulfate or silica fume and bentonite.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: August 29, 1989
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiharu Watanabe, Hisayuki Shimizu, Mineo Ito, Hitoshi Moriyama
  • Patent number: 4695511
    Abstract: A granule comprises an inner core, which is formed from a material which does not expand appreciably in the presence of organic compounds, and an outer shell formed from an organo-clay which is preferably held on the inner core with the aid of a binder.The granule can be prepared by tumbling a particle of the inner core material in admixture with a powdered organo-clay and a binder therefor. A particulate bed of the granules can be used for separating organic compounds from a mixture thereof with an aqueous medium.
    Type: Grant
    Filed: November 27, 1984
    Date of Patent: September 22, 1987
    Assignee: English Clays Lovering Pochin & Company
    Inventors: Howard Goodman, Andrew R. Fugler
  • Patent number: 4673437
    Abstract: An additive used in the production of concrete blocks comprises a mixture of water with attapulgite or peptized calcium bentonite. Problem concrete blocks which previously were normally subject to improper molding or cracking during the molding, unmolding, handling and curing steps during the manufacture thereof, are now easily produced and properly molded without cracking resulting during any of these steps. Whereas, it was previously nearly impossible to manufacture any acceptable concrete blocks without employing sufficient quantities of fines in the concrete block mix, the additive allows formation of acceptable concrete blocks in the absence of any fines at all, thereby enabling much more reliable production of standard blocks, thin-walled blocks, and even more lightweight blocks than heretofore possible, because the gradation and characteristics and relative proportions of the coarse and fine constituents of the aggregate in the mix are rendered far less critical than heretofore.
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: June 16, 1987
    Inventor: Lawrence F. Gelbman
  • Patent number: 4581864
    Abstract: A waterproofing unit adapted to be positioned against a structure to be protected comprising a grid sheet and a waterproofing composition disposed within the grid. The composition is a film forming material which is self-sustaining.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: April 15, 1986
    Inventors: Lidia Shvakhman, Ignatius T. Agro, Louis L. Chiusolo
  • Patent number: 4568390
    Abstract: An additive used in the production of concrete blocks comprises a mixture of water and sodium bentonite. Problem concrete blocks which previously were normally subject to improper molding or cracking during the molding, unmolding, handling and curing steps during the manufacture thereof, are now easily produced and properly molded without cracking resulting during any of these steps. Whereas, it was previously nearly impossible to manufacture any acceptable concrete blocks without employing sufficient quantities of fines in the concrete block mix, the additive allows formation of acceptable concrete blocks in the absence of any fines at all, thereby enabling much more reliable production of standard blocks, thin-walled blocks, and even more lightweight blocks than heretofore possible, because the gradation and characteristics and relative proportions of the coarse and fine constituents of the aggregate in the mix are rendered far less critical than heretofore.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: February 4, 1986
    Inventor: Lawrence F. Gelbman
  • Patent number: 4558875
    Abstract: The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is polyisobutylene, 10 to 20 weight % of silicate, 10 to 60 weight % of bentonite, said silicate and bentonite acting as fillers, and 10 to 40 weight % of plasticizer. The aforesaid water-stopping composition may be extruded into an elongated water stopper with or without a core therein, which water stopper can be inserted in a joint gap or other gap of structural members to stop water at the gap.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: December 17, 1985
    Assignee: Hayakawa Rubber Co. Ltd.
    Inventors: Hajime Yamaji, Takeshi Kobayashi
  • Patent number: 4511444
    Abstract: A backfill composition for use with sacrificial magnesium anodes used in the cathodic protection of ferrous metal structures comprises an anion-releasing material capable of releasing fluoride, phosphate or silicate ions in water-soluble form and a magnesium-transporting adjuvant capable of transporting magnesium ion by ion exchange conduction. Suitable anion-releasing materials include calcium fluoride, cryolite, magnesium silicate and sodium silicofluoride, while suitable magnesium transporting adjuvants include bentonite clay, calcium sulfate, calcium carbonate, calcium hydroxide and magnesium silicate. A particularly preferred composition comprises, on a dry basis, by weight, 76.7% calcium hydroxide, 2.3% calcium sulfate, 20% bentonite clay and 1% calcium fluoride.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: April 16, 1985
    Assignee: Columbia Gas Systems Service Corp.
    Inventor: Alexander J. Dukat
  • Patent number: 4483934
    Abstract: Raw bentonite is beneficiated by treating a substantially iron oxide-free bentonite, as an aqueous suspension, with an alkali at a temperature of at least 60.degree. C.; washing the alkali treated bentonite at least once with water; and then subjecting a suspension of the alkali-treated and washed bentonite to shearing, attrition and impact forces in a homogenizer of the type wherein the suspension is forced in the form of a film through a thin, hard-surfaced gap under a pressure of at least 1.7 MPa, and at high velocity. The suspension of bentonite thus obtained can then be dried to a product which has a good white color and is more resistent to bacteriological growth.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: November 20, 1984
    Assignee: English Clays Lovering Pochin & Co., Ltd.
    Inventors: Howard Goodman, Ian S. Bleakley
  • Patent number: 4463808
    Abstract: A well fluid and method for borehole sealing such as grouting or plugging, the fluid being comprised of water, a water swellable clay and a water dispersible polymer which prevents immediate hydration of the clay.
    Type: Grant
    Filed: June 10, 1982
    Date of Patent: August 7, 1984
    Assignee: NL Industries, Inc.
    Inventors: Carl E. Mason, Samuel E. Geffen
  • Patent number: 4435263
    Abstract: A magnesium anode backfill composition is prepared by mixing calcium sulfite, bentonite, and at least one compound selected from the group comprising sodium alkylates and sodium dialkyldithiocarbamates, wherein said bentonite contains a substantial amount of alkaline earth metal bentonite, such as calcium-bentonite.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: March 6, 1984
    Assignee: The Dow Chemical Company
    Inventor: Philip Y. Lau