Patents Assigned to Millennium Inorganic Chemicals, Inc.
  • Patent number: 8481452
    Abstract: An apparatus and method for treating diesel exhaust gases are described. The system consists of two functionalities, the first being a selective catalytic reduction (SCR) catalyst system and the second being a capture material for capturing catalyst components that have appreciable volatility under extreme exposure conditions. The SCR catalyst component is typically based on a majority phase of titania, with added minority-phase catalyst components comprising of one or more of the oxides of vanadium, silicon, tungsten, molybdenum, iron, cerium, phosphorous, copper and/or manganese vanadia. The capture material typically comprises a majority phase of high surface area oxides such as silica-stabilized titania, alumina, or stabilized alumina, for example, wherein the capture material maintains a low total fractional monolayer coverage of minority phase oxides for the duration of the extreme exposure.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: July 9, 2013
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventor: David M. Chapman
  • Patent number: 8394873
    Abstract: A particle of titanium dioxide treated with a polysiloxane is disclosed. One or more silicon atoms of the polysiloxane is substituted with an alkylene group terminating with a silyl group containing three substituents selected from the group consisting of hydroxy, halo, alkoxy, acetoxy, and mixtures thereof. These treated particles are blended with organic polymers to form a polyethylene polymer matrix having dispersed therein at least 55 wt % polysiloxane modified titanium dioxide particles.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: March 12, 2013
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Robert J. Kostelnik, Christopher J. Drury, Charles A. Wheddon
  • Publication number: 20120201732
    Abstract: A catalyst for removal of NOx from exhaust gas, containing cerium oxide and titanium dioxide, wherein a first portion of the cerium oxide forms at least one agglomerate of cerium oxide crystallites interdispersed in the titanium dioxide, and a second portion of the cerium oxide forms at least one island on a surface of the titanium dioxide, a method for producing the catalyst, a process for selectively reducing NOx levels in an exhaust gas using the catalyst, and an SCR canister containing the catalyst therein.
    Type: Application
    Filed: February 7, 2011
    Publication date: August 9, 2012
    Applicant: Millennium Inorganic Chemicals, Inc.
    Inventors: Steven Mark AUGUSTINE, David Monroe Chapman, Mark Barrett Watson
  • Patent number: 8148295
    Abstract: Low temperature activity of a vanadium-free selective catalytic reduction catalyst is provided by a mixed metal oxide support containing oxides of titanium and zirconium, the support having a promoter deposited on the surface of the mixed metal oxide support, and further having an active catalyst component deposited over the promoter on the mixed metal oxide support surface. Suitable promoters include oxides of silicon, boron, aluminum, cerium, iron, chromium, cobalt, nickel, copper, tin, silver, niobium, lanthanum, titanium, and combinations thereof. Suitable active catalyst components include oxides of manganese, iron and cerium.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 3, 2012
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventor: Steven M. Augustine
  • Patent number: 8088853
    Abstract: A particle of titanium dioxide treated with a polysiloxane is disclosed. One or more silicon atoms of the polysiloxane are substituted with an alkylene group that is terminated with a silyl group containing three substituents selected from the group consisting of hydroxy, halo, alkoxy, acetoxy, and mixtures thereof. These treated particles are blended with organic polymers.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: January 3, 2012
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Robert J. Kostelnik, Christopher J. Drury, Charles A. Wheddon
  • Patent number: 8075859
    Abstract: A nanocomposite particle, its use as a catalyst, and a method of making it are disclosed. The nanocomposite particle comprises titanium dioxide nanoparticles, metal oxide nanoparticles, and a surface stabilizer. The metal oxide nanoparticles are formed hydrothermally in the presence of the titanium dioxide nanoparticles. The nanocomposite particle is an effective catalyst support, particularly for DeNOx catalyst applications.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: December 13, 2011
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, Steven M. Augustine
  • Patent number: 7968492
    Abstract: Low temperature activity and high temperature ammonia selectivity of a vanadium-free selective catalytic reduction catalyst are controlled with a mixed oxide support containing oxides of titanium and zirconium, and a plurality of alternating layers respectively formed of a metal compound and titanium oxide present on the surface of the mixed oxide support. The metal compound is selected from the group consisting of manganese oxide, iron oxide, cerium oxide, tin oxide, and mixtures thereof.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: June 28, 2011
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventor: Steven M. Augustine
  • Patent number: 7964164
    Abstract: An improved process for recovering a titanium dioxide product from a titanium oxide-containing roasted mass of the type derived from roasting an ilmenite, anatase or perovskite ore by exploiting an organic acid, such as mixture of oxalic acid and ascorbic acid.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: June 21, 2011
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Graham Cooke, Animesh Jha, Abhishek Lahiri
  • Patent number: 7932208
    Abstract: A method of preparing stable, transparent photocatalytic titanium dioxide sots is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: April 26, 2011
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, Billiejo M. Monk, Robert McIntyre
  • Patent number: 7842641
    Abstract: A nanocomposite particle, its use as a catalyst, and a method of making it are disclosed. The nanocomposite particle comprises titanium dioxide nanoparticles, metal oxide nanoparticles, and a surface stabilizer. The metal oxide nanoparticles are formed hydrothermally in the presence of the titanium dioxide nanoparticles. The nanocomposite particle is an effective catalyst support, particularly for DeNOx catalyst applications.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: November 30, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, Steven M. Augustine
  • Patent number: 7820724
    Abstract: Stable, translucent or transparent titanium dioxide sols comprising amorphous titanium dioxide and an organic peptizing agent are provided that are useful in particulate binding applications. Also provided are methods for preparing the inventive sols. The inventive sols are prepared from titanium dioxide precursors including organotitanium compounds and water-soluble titanium salts that are treated to precipitate amorphous titanium dioxide. The amorphous titanium dioxide is re-dispersed and peptized to form a translucent or transparent mixture. The inventive sols are stable for an extended period of time.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: October 26, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, BillieJo M. Monk
  • Patent number: 7820583
    Abstract: A nanocomposite particle, its use as a catalyst, and a method of making it are disclosed. The nanocomposite particle comprises titanium dioxide nanoparticles, metal oxide nanoparticles, and a surface stabilizer. The metal oxide nanoparticles are formed hydrothermally in the presence of the titanium dioxide nanoparticles. The nanocomposite particle is an effective catalyst support, particularly for DeNOx catalyst applications.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: October 26, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, Steven M. Augustine
  • Patent number: 7806977
    Abstract: Pigment compositions and methods are provided comprising coupling agents. In various embodiments, a pigment is provided comprising titanium dioxide and a coupling agent having the formula: (R?O)(q-n)M(XRm)n wherein M is Ti, Zr, Sn, or Al; X is —CO2, ?PO2, —PO2(OH), ?PO2PO2(OH), or —SO3; m is 1 or 2; n is 1, 2, or 3 and q is 4 when M is Ti, Zr or Sn, or n is 1 or 2 and q is 3 when M is Al; R? is a substituted or unsubstituted alkyl, alkynyl, alkydiyl, alkyleno, alkanyl, alkenyl, alkoxy, aryl, arylalkyl, arylaryl, aryldiyl, or aryleno; and R is a substituted or unsubstituted alkyl, alkynyl, alkydiyl, alkyleno, alkanyl, alkenyl, alkoxy, aryl, arylalkyl, arylaryl, aryldiyl, or aryleno, wherein R comprises a carbon chain of 2 to 30 carbon atoms. The pigment compositions have improved lacing resistance, dispersibility, stability or combinations thereof.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: October 5, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Gang Lu, Linh Thuy Cheong, William W. Reichert
  • Patent number: 7763565
    Abstract: A method of preparing stable, transparent photocatalytic titanium dioxide sols is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: July 27, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, BillieJo M. Monk, Robert McIntyre
  • Patent number: 7763111
    Abstract: In various embodiments, a pigment composition is provided comprising a base particle and a dispersing agent, the dispersing agent comprising a salt and/or ester of: (i) an amine, alcohol, and/or alkanol amine and (ii) a polyprotic acid, wherein the mole ratio of the amine, alcohol, and/or alkanol amine to the polyprotic acid is greater than 3:1. In various embodiments, the pigments have improved stability, hiding power, tint strength, and/or gloss.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: July 27, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Modasser El-Shoubary, Robert M. Hopkins, Karen L. Bowen, David E. Bell
  • Patent number: 7686882
    Abstract: In various embodiments, methods and compositions are provided comprising titanium dioxide and silica spacers having improved light stability for use in paper, plastic and paints.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: March 30, 2010
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Duen-Wh Hua, Fu-Chu Wen
  • Patent number: 7625536
    Abstract: This invention relates to a process for beneficiating a titaniferous ore. The process comprises leaching the titaniferous ore with sulfuric acid to form a leached ore, calcining the leached ore in the presence of oxygen to form a calcined ore, and leaching the calcined ore with sulfuric acid, hydrochloric acid, and/or nitric acid to form a beneficiated ore. The leached ore is not reduced prior to or following calcination.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: December 1, 2009
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Earl M. Smith, Jr., Andrea de Castro Sheldon
  • Patent number: 7521039
    Abstract: The present invention is directed to photocatalytically active rutile titanium dioxide. The photocatalytically active rutile titanium dioxide of the present invention demonstrates enhanced activity in the visible light spectrum. It may be produced by neutralizing rutile seed to a higher pH than that at which it has traditionally been neutralized prior to washing and thermally treating the seed.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: April 21, 2009
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Claire Bygott, Michel Ries, Stephen P. Kinniard
  • Publication number: 20090061246
    Abstract: De-polluting, self-cleaning coating compositions are disclosed which comprise an organic binder having dispersed therein photocatalytic titanium dioxide particles substantially in anatase form which have an average crystallite size between about 1 nm and about 150 nm and which preferably have photocatalytic activity in the presence of visible light. Advantageously, the coatings of the invention do not require pre-activation to achieve high initial photocatalytic activity against pollutants in the air, such as NOx compounds.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Applicant: Millennium Inorganic Chemicals, Inc.
    Inventors: Julie Elizabeth Maltby, Claire Bygott
  • Publication number: 20090062111
    Abstract: A method of preparing stable, transparent photocatalytic titanium dioxide sots is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Applicant: Millennium Inorganic Chemicals, Inc.
    Inventors: Guoyi Fu, BillieJo M. Monk, Robert McIntyre