Patents by Inventor Guy Peloquin

Guy Peloquin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10508042
    Abstract: A process for producing alumina trihydrate includes a digestion step, a separation step, and a precipitation step the separation step including: b1) pretreating a slurry from the digestion step by adding a flocculant to said slurry and mixing the flocculant and the slurry, b2) settling the resulting flocculated slurry in a gravity settler vessel, b3) determining a measured value representative of the concentration of solid particles in the resulting clarified liquor, b4) comparing the measured value with a predetermined threshold, b5) feeding said clarified liquor directly to the precipitation step, while the measured value is less than said predetermined threshold, and b6) redirecting said clarified liquor to the pre-treatment step b1), when the measured value is more than said predetermined threshold. An installation may be configured for operating said process.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: December 17, 2019
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Michaël Reid, Guy Peloquin, Matthieu St-Laurent, Philippe Racine
  • Patent number: 10494280
    Abstract: A process is disclosed for treating a Bayer process waste comprising a slurry containing bauxite residue and dissolved aluminum. The process comprises supplying the waste to a settling area to cause the bauxite residue to settle out of the slurry, thereby producing a supernatant liquor. The process further comprises neutralizing the supernatant liquor with a solution containing magnesium and calcium to produce a neutralized slurry containing precipitated hydrotalcites and thickening the neutralized slurry to produce a clarified effluent and a compacted slurry containing the precipitated hydrotalcites, part of said compacted slurry being recirculated to the supernatant liquor to be neutralized and/or directly to the neutralizing step. The clarified effluent and the compacted slurry are disposed of separately. Also disclosed is a plant for treating a Bayer process waste.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: December 3, 2019
    Assignee: Rio Tinto Alcan International Limited
    Inventors: John Victor Anderson, Jean-Marc Rousseaux, Guy Peloquin, Ben O'Brien
  • Patent number: 10113645
    Abstract: A seal arrangement allowing in-line maintenance and replacement of packing, seals and bushings of a rotary shaft driving a tool extending inside a fluid holding tank. The rotary shaft and associated seals are mounted in an extractable cartridge removably insertable in sealing engagement within a housing projecting outwardly from the tank. A secondary seal comprises an isolation valve mounted to the housing outside of the tank for temporarily providing sealing during servicing of the seals in the extracted cartridge. A tertiary seal is provided for protecting the secondary seal from the tank contents when used in scaling environments. Removable parts of said seal arrangement.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: October 30, 2018
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Deane Labrum, Dean Beltrame, Guy Peloquin, Alain Boivin
  • Publication number: 20170001129
    Abstract: A settler for decanting mineral slurries includes a tank having a side wall, a bottom and a top, an outlet for a thickened slurry at the bottom of the tank, a first overflow outlet for withdrawing an overflow stream of a clarified liquid, a slurry inlet means for introducing fresh slurry into the tank, the slurry inlet means having a slurry opening through which fresh slurry joins a body of slurry in the tank, and a stirrer having a vertical axis around which the stirrer rotates or reciprocates, in said settler the slurry opening is displaced laterally relative to said vertical axis of the stirrer and said slurry inlet means comprises mixing means. A separation installation includes the above settler and a method for separating a clarified liquid from a thickened slurry of a mineral slurry.
    Type: Application
    Filed: November 28, 2014
    Publication date: January 5, 2017
    Applicant: RIO TINTO ALCAN INTERNATIONAL LIMITED
    Inventors: Michael REID, Guy PELOQUIN, Matthieu ST-LAURENT, Philippe RACINE
  • Publication number: 20170001876
    Abstract: A process for producing alumina trihydrate includes a digestion step, a separation step, and a precipitation step the separation step including: b1) pretreating a slurry from the digestion step by adding a flocculant to said slurry and mixing the flocculant and the slurry, b2) settling the resulting flocculated slurry in a gravity settler vessel, b3) determining a measured value representative of the concentration of solid particles in the resulting clarified liquor, b4) comparing the measured value with a predetermined threshold, b5) feeding said clarified liquor directly to the precipitation step, while the measured value is less than said predetermined threshold, and b6) redirecting said clarified liquor to the pre-treatment step b1), when the measured value is more than said predetermined threshold. An installation may be configured for operating said process.
    Type: Application
    Filed: November 28, 2014
    Publication date: January 5, 2017
    Inventors: Michaël Reid, Guy PELOQUIN, Matthieu ST-LAURENT, Philippe RACINE
  • Publication number: 20170002927
    Abstract: A seal arrangement allowing in-line maintenance and replacement of packing, seals and bushings of a rotary shaft driving a tool extending inside a fluid holding tank. The rotary shaft and associated seals are mounted in an extractable cartridge removably insertable in sealing engagement within a housing projecting outwardly from the tank. A secondary seal comprises an isolation valve mounted to the housing outside of the tank for temporarily providing sealing during servicing of the seals in the extracted cartridge. A tertiary seal is provided for protecting the secondary seal from the tank contents when used in scaling environments.
    Type: Application
    Filed: December 4, 2014
    Publication date: January 5, 2017
    Inventors: Deane LABRUM, Dean BELTRAME, Guy PELOQUIN, Alain BOIVIN
  • Patent number: 9238184
    Abstract: An apparatus for refining a process liquor that includes solids, which apparatus includes a vessel having a base and a side wall that define an internal volume for containing the process liquor and for allowing gravity settling of the solids in the liquor, whereby to produce a refined liquor toward a top of the internal volume and a slurry toward a bottom of the internal volume, the apparatus further includes solids displacement elements disposed within the internal volume for directing settled solids and/or settling solids in the vicinity of the side wall or of the base toward a flow path of the slurry being extracted from the slurry outlet. A processing plant including the above refining apparatus and a method for refining a process liquor.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: January 19, 2016
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Guy Peloquin, Alain Larouche, Alain Boivin, Matthieu St-Laurent, Régis Girard, Guy Simard
  • Publication number: 20150284278
    Abstract: A process is disclosed for treating a Bayer process waste comprising a slurry containing bauxite residue and dissolved aluminium. The process comprises supplying the waste to a settling area to cause the bauxite residue to settle out of the slurry, thereby producing a supernatant liquor. The process further comprises neutralizing the supernatant liquor with a solution containing magnesium and calcium to produce a neutralized slurry containing precipitated hydrotalcites and thickening the neutralized slurry to produce a clarified effluent and a compacted slurry containing the precipitated hydrotalcites, part of said compacted slurry being recirculated to the supernatant liquor to be neutralized and/or directly to the neutralizing step The clarified effluent and the compacted slurry are disposed of separately. Also disclosed is a plant for treating a Bayer process waste.
    Type: Application
    Filed: October 21, 2013
    Publication date: October 8, 2015
    Inventors: John Victor Anderson, Jean-Marc Rousseaux, Guy Peloquin, Ben O'Brien
  • Publication number: 20130206707
    Abstract: An apparatus for refining a process liquor that includes solids, which apparatus includes a vessel having a base and a side wall that define an internal volume for containing the process liquor and for allowing gravity settling of the solids in the liquor, whereby to produce a refined liquor toward a top of the internal volume and a slurry toward a bottom of the internal volume, the apparatus further includes solids displacement elements disposed within the internal volume for directing settled solids and/or settling solids in the vicinity of the side wall or of the base toward a flow path of the slurry being extracted from the slurry outlet. A processing plant including the above refining apparatus and a method for refining a process liquor.
    Type: Application
    Filed: August 10, 2011
    Publication date: August 15, 2013
    Applicant: RIO TINTO ALCAN INTERNATIONAL LIMITED
    Inventors: Guy Peloquin, Alain Larouche, Alain Boivin, Matthieu St-Laurent, Régis Girard, Guy Simard
  • Publication number: 20130168326
    Abstract: The invention concerns a method for separating solid and liquor components of a process slurry comprising solid material entrained in a liquor, said method comprising: (a) a pre-treatment step of adding a flocculent to the process slurry and mixing the flocculent and the slurry by selecting a higher extent of mixing in an early stage of said step than in a later stage of said step, and (b) a solid/liquor separation step of allowing separation of solid material, including aggregates of solid material, and liquor of said process slurry to produce process outputs of a clarified liquor and solid material with some entrained liquor. The invention also concernes a method and an apparatus for adding a flocculent to a process slurry.
    Type: Application
    Filed: July 7, 2011
    Publication date: July 4, 2013
    Applicant: RIO TINTO ALCAN INTERNATIONAL LIMITED
    Inventors: Nicolas-Alexandre Bouchard, Guy Peloquin, Renald Dufour
  • Patent number: 7473376
    Abstract: Method and apparatus for separating components of slurries by gravity settling thereby forming a thickened slurry and a clarified liquid. The apparatus comprises a vessel for decanting a volume of slurry, the vessel having a top and an interior formed by a side wall and a bottom wall for holding the slurry, a slurry inlet means, an outlet for the clarified liquid near the top of the vessel, and a slurry withdrawal apparatus for removal of the thickened slurry from the vessel at or near the bottom wall thereof. The slurry withdrawal apparatus physically engages a portion of the slurry within the vessel interior and transports it through a vessel outlet.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: January 6, 2009
    Assignee: Alcan International Limited
    Inventors: Guy Peloquin, Renald Dufour, Andrew N. Carruthers, Donald Puxley
  • Publication number: 20070045202
    Abstract: Method and apparatus for separating components of slurries by gravity settling thereby forming a thickened slurry and a clarified liquid. The apparatus comprises a vessel for decanting a volume of slurry, the vessel having a top and an interior formed by a side wall and a bottom wall for holding the slurry, a slurry inlet means, an outlet for the clarified liquid near the top of the vessel, and a slurry withdrawal apparatus for removal of the thickened slurry from the vessel at or near the bottom wall thereof. The slurry withdrawal apparatus physically engages a portion of the slurry within the vessel interior and transports it through a vessel outlet.
    Type: Application
    Filed: August 22, 2006
    Publication date: March 1, 2007
    Inventors: Guy Peloquin, Renald Dufour, Andrew Carruthers, Donald Puxley
  • Patent number: 6936178
    Abstract: The invention relates to a settler for decanting mineral slurries and a method thereof. The settler comprises a tank for holding and decanting a body of slurry to form a thickened slurry as a lower layer and a clarified liquid as an upper layer, the tank having a side wall, a bottom and a top, an outlet for the thickened slurry at the bottom of the tank, an outlet for the clarified liquid layer near the top of the tank, a slurry inlet means near the top of the tank for introducing fresh slurry into the tank, the slurry inlet means having a slurry opening through which fresh slurry joins the body of slurry in the tank, and a stirrer having a generally vertical axis around which the stirrer rotates or reciprocates. The slurry opening is displaced laterally relative to the generally vertical axis of the stirrer and the slurry inlet means is configured to allow the fresh slurry to enter the slurry body without accumulating solids from the fresh slurry at the slurry opening.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: August 30, 2005
    Assignee: Alcan International Limited
    Inventors: Guy Peloquin, Guy Simard, Alain Boivin, Renald Dufour, Rock Lemyre, Andrew Carruthers
  • Publication number: 20030106860
    Abstract: The invention relates to a settler for decanting mineral slurries and a method hereof. The settler comprises a tank for holding and decanting a body of slurry to form a thickened slurry as a lower layer and a clarified liquid as an upper layer, the tank having a side wall, a bottom and a top, an outlet for the thickened slurry at the bottom of the tank, an outlet for the clarified liquid layer near the top of the tank, a slurry inlet means near the top of the tank for introducing fresh slurry into the tank, the slurry inlet means having a slurry opening through which fresh slurry joins the body of slurry in the tank, and a stirrer having a generally vertical axis around which the stirrer rotates or reciprocates. The slurry opening is displaced laterally relative to the generally vertical axis of the stirrer and the slurry inlet means is configured to allow the fresh slurry to enter the slurry body without accumulating solids from the fresh slurry at the slurry opening.
    Type: Application
    Filed: November 7, 2002
    Publication date: June 12, 2003
    Inventors: Guy Peloquin, Guy Simard, Alain Boivin, Renald Dufour, Rock Lemyre, Andrew Carruthers
  • Patent number: 5747672
    Abstract: An ultrasonic device for detecting concentrations of solids or positions of solid/liquid interfaces in liquid media, particularly Bayer process liquids. The device comprises at least one piezoelectric element provided with electrodes; electrical circuit elements connected to the electrodes for conveying electrical signals, in use, to and from control apparatus; an ultrasound-transparent window, made of glassy carbon, positioned adjacent to the or each piezoelectric element; a protective matrix, preferably of epoxy resin, embedding and surrounding said the or each piezoelectric element and the electrodes while allowing ultrasonic waves to pass through the or each adjacent window to or from the piezoelectric element, and an external protective cover, preferably comprising an elastomer that is resistant to caustic alkali and has a smooth and non-porous surface, forming an exterior of the device except at the or each window.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: May 5, 1998
    Assignee: Alcan International Limited
    Inventors: Luc Parent, Guy Peloquin, Gilles Tremblay, Andre Vaillancourt