Patents Assigned to Minerals Technologies
  • Publication number: 20020176813
    Abstract: A method and apparatus for improving contact between a liquid and a reactant gas by moving the liquid in a serpentine path that moves horizontally and vertically through individual chambers or stations in an elongated tank or reactor and introducing a reactant gas into the liquid in one or more of the stations or chambers as the liquid moves through the tank or reactor.
    Type: Application
    Filed: May 8, 2002
    Publication date: November 28, 2002
    Applicant: Minerals Technologies Inc.
    Inventor: Gerald Dean Erdman
  • Publication number: 20020148582
    Abstract: The present invention relates to an acid-stabilized calcium carbonate slurry having a pH of less than 7, preferably between about 6 and about 7, containing water, calcium carbonate, preferably precipitated calcium carbonate, and an acid-stabilizer of a water soluble calcium salt, a weak acid, a chelating agent, a weak acid capable of chelating calcium ion, or a mixture thereof. The acid-stabilizer is present in an amount sufficient to provide an aqueous calcium carbonate slurry having an increased calcium ion concentration and an acidic pH. In a typical acid-stabilized calcium carbonate slurry of the invention, the acid-stabilizer is present in an amount sufficient to provide a calcium ion concentration of about 1 millimolar to about 5 molar, preferably from about 1 to about 120 millimolar.
    Type: Application
    Filed: April 4, 2001
    Publication date: October 17, 2002
    Applicant: Minerals Technologies Inc.
    Inventor: Donald Kendall Drummond
  • Patent number: 6454907
    Abstract: Method and apparatus for concentrating slurries by removing liquid in a single effect unit maintained under vacuum to effect low temperature flashing of the liquid. The single effect unit is a single flash column with separate recirculation loops, one to preheat incoming slurry for concentration and a separate loop for withdrawal of concentrated slurry Vapor from the flash column can be treated to separate liquid from other components in the vapor.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: September 24, 2002
    Assignee: Minerals Technologies, Inc.
    Inventor: Gerald Dean Erdman
  • Patent number: 6451268
    Abstract: A method and apparatus for improving contact between a liquid and a reactant gas by moving the liquid in a serpentine path that moves horizontally and vertically through individual chambers or stations in an elongated tank or reactor and introducing a reactant gas into the liquid in one or more of the stations or chambers as the liquid moves through the tank or reactor.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: September 17, 2002
    Assignee: Minerals Technologies Inc.
    Inventor: Gerald Dean Erdman
  • Patent number: 6420289
    Abstract: A synthetic silicate pellet is provided having component of calcium and magnesium, either together or in the alternative. Such pellet is further provided with either an aluminate silicate binder and/or an ion flow catalyst. The synthetic silicate pellet has use as a glass batch component.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: July 16, 2002
    Assignee: Minerals Technologies Inc.
    Inventors: Gary Peter Tomaino, John Albert Hockman
  • Patent number: 6409819
    Abstract: The invention describes an activated supersulphated aluminosilicate binder containing aluminosilicates, calcium sulphate and an activator containing alkali metal salts, wherein the aluminosilicates are selected from the group consisting of blast furnace slag, clay, marl and industrial by-products such as fly ash with the proviso that the Al2O3 content is greater than 5% by weight, wherein blast furnace slag is present in an amount exceeding 35% by weight and clay, marl and/or fly ash is present in an amount exceeding 5% per weight and wherein cement kiln dust in an amount of from 3 to 10% by weight is added to the mixture as an activator and calcium sulphate is used in an amount exceeding 5% by weight.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: June 25, 2002
    Assignee: International Mineral Technology AG
    Inventor: Suz-Chung Ko
  • Publication number: 20020053258
    Abstract: A cored wire consisting of an inner calcium wire surrounded by an aluminum sheath forming a composite core which in turn is encased in a steel jacket. The cored wire is formed continuously by covering an extruded calcium wire with aluminum then inserting the aluminum covered calcium wire into a steel jacket in a roll forming process. Also disclosed is a method of reducing splashing when introducing calcium metal into a molten ferrous metal bath.
    Type: Application
    Filed: January 17, 2002
    Publication date: May 9, 2002
    Applicant: Minerals Technologies Inc.
    Inventors: Phillip Ronald King, Richard Shaddinger Baum
  • Patent number: 6346135
    Abstract: A cored wire consisting of an inner calcium wire surrounded by an aluminum sheath forming a composite core which in turn is encased in a steel jacket. The cored wire is formed continuously by covering an extruded calcium wire with aluminum then inserting the aluminum covered calcium wire into a steel jacket in a roll forming process. Also disclosed is a method of reducing splashing when introducing calcium metal into a molten ferrous metal bath.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: February 12, 2002
    Assignee: Minerals Technologies Inc.
    Inventors: Phillip Ronald King, Richard Shaddinger Baum
  • Patent number: 6336346
    Abstract: A synthetic silicate pellet is provided having a component(s) of calcium and magnesium, either together or in the alternative. Such pellet is further provided with either an aluminate silicate binder and/or an ion flow catalyst. The synthetic silicate pellet has use as a glass batch component.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: January 8, 2002
    Assignee: Minerals Technologies Inc.
    Inventors: Gary Peter Tomaino, John Albert Hockman
  • Patent number: 6294143
    Abstract: A product and a process for the preparation of discrete calcium carbonate particles that result from preparing an aqueous calcium carbonate slurry containing carbohydrates, carbonating the aqueous calcium carbonate slurry while maintaining the selected starting carbonation temperature. The product of the present invention is discrete particles of calcium carbonate which are especially useful in paints, plastics, paper coating, paper filling, and because of the purity level of the calcium carbonate particle may be used in cosmetics, pharmaceuticals and food applications.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: September 25, 2001
    Assignee: Minerals Technologies Inc.
    Inventors: Donald Richard Deutsch, Kenneth James Wise
  • Patent number: 6287378
    Abstract: A method is disclosed of producing a synthetic silicate. The method is advantageous in providing material useful in glass making. Such method involves the reaction of calcium oxides and magnesium oxides, water and sodium silicates. The glass formation is performed at a lower temperature than usual and performed with a lower amount of volatile gas release. Less cristobalite formation in the glass occurs. The synthetic silicate produced can be a cylindrical pellet.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: September 11, 2001
    Assignee: Minerals Technologies, Inc.
    Inventors: George Henry Fairchild, John Albert Hockman
  • Patent number: 6287423
    Abstract: Novel polymers are provided having phosphonated and sulphonated substituent groups such that the polymers is multifunctional in its use. Optional amide substituents are used to reduce electrostatic charge density or for hydrogen bonding. An advantage of the polymer is the flexibility of using it for multiple purposes. A particular application is for bonding paper fillers and paper fiber together.
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: September 11, 2001
    Assignee: Minerals Technologies Inc.
    Inventors: Donald Kendall Drummond, Patrick Clinton Wernett
  • Patent number: 6287997
    Abstract: A method is disclosed of producing a synthetic silicate. The method is advantageous in providing material useful in glass making. Such method involves the reaction of calcium oxides and magnesium oxides, water and sodium silicates. The glass formation is performed at a lower temperature than usual and performed with a lower amount of volatile gas release. Less cristobalite formation in the glass occurs. The synthetic silicate produced can be a cylindrical pellet.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: September 11, 2001
    Assignee: Minerals Technologies Inc.
    Inventors: George Henry Fairchild, John Albert Hockman
  • Patent number: 6280497
    Abstract: A cored wire continuously formed by continuously inserting an extruded core inside a continuously roll formed sheath, the peripheral edges of the roll formed sheath joined by a continuous lock seam. Inspection of the partially formed lock seam at a designated process step serves to warn the user of malformed or defective lock seam portions in the finished cored wire.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: August 28, 2001
    Assignee: Minerals Technologies Inc.
    Inventors: Phillip Ronald King, Richard Shaddinger Baum
  • Publication number: 20010016550
    Abstract: A synthetic silicate pellet is provided having a component(s) of calcium and magnesium, either together or in the alternative. Such pellet is further provided with either an aluminate silicate binder and/or an ion flow catalyst. The synthetic silicate pellet has use as a glass batch component.
    Type: Application
    Filed: February 21, 2001
    Publication date: August 23, 2001
    Applicant: Minerals Technologies Inc.
    Inventors: Gary Peter Tomaino, John Albert Hockman
  • Patent number: 6271159
    Abstract: A method is disclosed of producing a synthetic silicate. The method is advantageous in providing material useful in glass making. Such method involves the reaction of calcium oxides and magnesium oxides, water and sodium silicates. The glass formation is performed at a lower temperature than usual and performed with a lower amount of volatile gas release. Less cristobalite formation in the glass occurs. The synthetic silicate produced can be a cylindrical pellet.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: August 7, 2001
    Assignee: Minerals Technologies Inc.
    Inventors: George Henry Fairchild, John Albert Hockman
  • Patent number: 6228249
    Abstract: The present invention provides an electrochemical process for reducing metal contaminants in calcium carbonate by solubilizing the metal contaminate in an aqueous solution of calcium carbonate and then removing the solubilized metal contaminant by passing an electrical current through the aqueous calcium carbonate solution containing the solubilized metal contaminant. Calcium carbonate produced according to the process of this invention is particularly suitable for use as food or pharmaceutical additives. The calcium carbonate is also suitable for use in papermaking process as fillers, or coatings, or as additives in the production of plastics, paints and adhesive products. Other uses of high purity calcium carbonate include catalysts and catalyst supports, electrical/semiconductor applications, florescent lighting, and optical/laser applications.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: May 8, 2001
    Assignee: Minerals Technologies Inc.
    Inventor: Donald Kendall Drummond
  • Patent number: 6228161
    Abstract: The present invention relates to an acid-stabilized calcium carbonate slurry having a pH of less than 7, preferably between about 6 and about 7, containing water, calcium carbonate, preferably precipitated calcium carbonate, and an acid-stabilizer of a water soluble calcium salt, a weak acid, a chelating agent, a weak acid capable of chelating calcium ion, or a mixture thereof. The acid-stabilizer is present in an amount sufficient to provide an aqueous calcium carbonate slurry having an increased calcium ion concentration and an acidic pH. In a typical acid-stabilized calcium carbonate slurry of the invention, the acid-stabilizer is present in an amount sufficient to provide a calcium ion concentration of about 1 millimolar to about 5 molar, preferably from about 1 to about 120 millimolar.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: May 8, 2001
    Assignee: Minerals Technologies Inc.
    Inventor: Donald Kendall Drummond
  • Patent number: 6211103
    Abstract: A synthetic silicate pellet is provided having component of calcium and magnesium, either together or in the alternative. Such pellet is further provided with either an aluminate silicate binder and/or an ion flow catalyst. The synthetic silicate pellet has use as a glass batch component.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: April 3, 2001
    Assignee: Minerals Technologies Inc.
    Inventors: Gary Peter Tomaino, John Albert Hockman
  • Patent number: 6183650
    Abstract: A composition comprising the product precipitated in the admixing of a soluble metal salt and one or more compounds having a component selected from silicates, phosphates and borates; and a method for controlling drainage and/or retention in the formation of a paper matrix or for treating water comprising the use of such product.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: February 6, 2001
    Assignee: Minerals Technologies Inc.
    Inventor: Donald Kendall Drummond