Patents Assigned to Praxair Technology, Inc.
  • Storage and delivery of antimony-containing materials to an ion implanter
    Patent number: 10711343
    Abstract: A novel method, composition and storage and delivery container for using antimony-containing dopant materials are provided. The composition is selected with sufficient vapor pressure to flow at a steady, sufficient and sustained flow rate into an arc chamber as part of an ion implant process. The antimony-containing material is represented by a non-carbon containing chemical formula, thereby reducing or eliminating the introduction of carbon-based deposits into the ion chamber. The composition is stored in a storage and delivery vessel under stable conditions, which includes a moisture-free environment that does not contain trace amounts of moisture. The storage and delivery container is specifically designed to allow delivery of high purity, vapor phase antimony-containing dopant material at a steady, sufficient and sustained flow rate.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: July 14, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Aaron Reinicker, Ashwini K Sinha, Douglas C Heiderman
  • Method for weakening and removing coke and carbonaceous deposits
    Patent number: 10702897
    Abstract: The present invention concerns a method of weakening and removal of coke or carbonaceous material which deposits as a result of thermal cracking of hydrocarbons on the inner walls of coils, piping, tubing, and in general, hydrocarbon processing equipment.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: July 7, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventor: William J Scharmach
  • Annular divided wall column for an air separation unit
    Patent number: 10684071
    Abstract: An annular divided wall column for the cryogenic rectification of air or constituents of air is provided. The annular divided wall column includes a first annular column wall and a second annular column wall disposed within the first annular column wall and radially spaced therefrom to define an annulus column region as the space between the first annular column wall and the second annular column wall. An interior core column region is also defined by the interior space of the second annular column wall. The present annular divided wall column further includes a plurality of packing elements, plurality of trays or a heat exchange device disposed within the interior core column region; and a plurality of packing elements disposed within the annulus column region.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: June 16, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kirk F. Larson, Paul W. Belanger, Steven C. Brown, John P. Ricotta, Guang X. Chen, Richard D. Lenz
  • System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit
    Patent number: 10663224
    Abstract: A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon, an overall nitrogen recovery of 98 percent or greater and limited gaseous oxygen production. The air separation is configured to produce a first high purity oxygen enriched stream and a second lower purity oxygen enriched stream from the lower pressure column, one of which is used as the refrigerant to condense the argon in the argon condenser, with the resulting vaporized oxygen stream used to regenerate the temperature swing adsorption pre-purifier unit. All or a portion of the first high purity oxygen enriched stream is vaporized in the main heat exchanger to produce the gaseous oxygen products.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: May 26, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Neil M. Prosser, Brian R. Kromer, James R. Handley
  • System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit
    Patent number: 10663222
    Abstract: A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon, an overall nitrogen recovery of 98 percent or greater and limited gaseous oxygen production. The air separation is configured to produce a first high purity oxygen enriched stream and a second lower purity oxygen enriched stream from the lower pressure column, one of which is used as the refrigerant to condense the argon in the argon condenser, with the resulting vaporized oxygen stream used to regenerate the temperature swing adsorption pre-purifier unit. All or a portion of the first high purity oxygen enriched stream is vaporized in the main heat exchanger to produce the gaseous oxygen products.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: May 26, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Brian R. Kromer, James R. Handley, Neil M. Prosser
  • System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit
    Patent number: 10663223
    Abstract: A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon, an overall nitrogen recovery of 98% or greater and limited gaseous oxygen production. The air separation is configured to produce a first high purity oxygen enriched stream and a second lower purity oxygen enriched stream from the lower pressure column, one of which is used as the refrigerant to condense the argon in the argon condenser, with the resulting vaporized oxygen stream used to regenerate the temperature swing adsorption pre-purifier unit. All or a portion of the first high purity oxygen enriched stream is vaporized in the main heat exchanger to produce the gaseous oxygen products.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: May 26, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: James R. Handley, Neil M. Prosser, Brian R. Kromer
  • Core-in-shell composite adsorbent for use in PSA prepurifiers
    Patent number: 10646816
    Abstract: The present invention relates generally to an attrition resistant core-in-shell composite adsorbent comprising at least a zeolite-containing CO2 removal adsorbent and a binder on an inert dense core. The attrition resistant core-in-shell composite adsorbent has an attrition loss of less than about 2 wt %. The core-in-shell composite adsorbent is preferably used in a multi-layered adsorption system in a cyclic adsorption process, preferably used in a PSA prepurification process prior to cryogenic air separation.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: May 12, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Jian Zheng, Neil A. Stephenson, Steven J. Pontonio, Christopher D. Schotz, Philip A. Barrett
  • Tin-containing dopant compositions, systems and methods for use in ion implantation systems
    Patent number: 10633402
    Abstract: A novel method and system for using certain tin compounds as dopant sources for ion implantation are provided. A suitable tin-containing dopant source material is selected based on certain attributes. Some of these attributes include stability at room temperature; sufficient vapor pressure to be delivered from its source supply to an ion chamber and, the ability to produce a suitable beam current for ion implantation to achieve the required implant Sn dosage.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: April 28, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Aaron Reinicker, Ashwini K. Sinha, Qiong Guo
  • Thermochemical regeneration with superadiabatic flame temperature
    Patent number: 10611976
    Abstract: Operation of a thermochemical regenerator at a controlled ratio of recycled flue gas to reforming fuel provides formation of fuel species that permit a higher flame temperature upon combustion of the resulting combustible mixture.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: April 7, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Hisashi Kobayashi, Kuang-Tsai Wu
  • Antimony-containing materials for ion implantation
    Patent number: 10597773
    Abstract: A novel method, composition and system for using antimony-containing dopant materials are provided. The composition is selected with sufficient vapor pressure to flow into an arc chamber as part of an ion implant process. The antimony-containing material is represented by a non-carbon containing chemical formula, thereby reducing or eliminating the introduction of carbon-based deposits into the ion chamber. The composition is stored in a storage and delivery vessel under stable conditions, which includes a moisture-free environment that does not contain trace amounts of moisture.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: March 24, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Aaron Reinicker, Ashwini K Sinha, Douglas C Heiderman
  • Efficient use of biomass in regenerative furnace firing
    Patent number: 10590346
    Abstract: Efficiency of a thermochemical regeneration combustion system is enhanced by incorporation of gaseous products from pyrolysis of fuel such as biomass.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: March 17, 2020
    Assignee: Praxair Technology, Inc.
    Inventor: Hisashi Kobayashi
  • Annular divided wall column with ring shaped collectors and distributers for an air separation unit
    Patent number: 10578357
    Abstract: An annular divided wall column for the cryogenic rectification of air or constituents of air is provided. The annular divided wall column includes a first annular column wall and a second annular column wall disposed within the first annular column wall to define an annulus column region and an interior core column region. The present annular divided wall column further includes structured packing elements disposed within at least the annulus column region as well as a ring-shaped cantilevered collector; and a ring-shaped distributor disposed in the annulus column region above or below the plurality of structured packing elements. The thermal expansion and contraction of the second annular column wall in a radial direction and in an axial direction is independent of the thermal expansion and contraction of the first annular column wall in the radial and axial directions.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: March 3, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kevin J. Saboda, Paul W. Belanger, Richard D. Lenz, Kirk F. Larson, Steven C. Brown, John P. Ricotta, Guang X. Chen, Jeremy D. Faust
  • Annular divided wall column for an air separation unit
    Patent number: 10578355
    Abstract: An annular divided wall column for the cryogenic rectification of air or constituents of air is provided. The annular divided wall column includes a first annular column wall and a second annular column wall disposed within the first annular column wall to define an annulus column region and an interior core column region. The present annular divided wall column further includes structured packing elements disposed within at least the annulus column region as well as a ring-shaped cantilevered collector; and a ring-shaped distributor disposed in the annulus column region above or below the plurality of structured packing elements. The thermal expansion and contraction of the second annular column wall in a radial direction and in an axial direction is independent of the thermal expansion and contraction of the first annular column wall in the radial and axial directions.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: March 3, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kevin J. Saboda, Paul W. Belanger, Richard D. Lenz, Kirk F. Larson, Steven C. Brown, John P. Ricotta, Guang X. Chen, Jeremy D. Faust
  • Annular divided wall column for an air separation unit having a ring shaped support grid
    Patent number: 10578356
    Abstract: An annular divided wall column for the cryogenic rectification of air or constituents of air is provided. The annular divided wall column includes a first annular column wall and a second annular column wall disposed within the first annular column wall to define an annulus column region and an interior core column region. The present annular divided wall column further includes structured packing elements disposed within at least the annulus column region as well as a ring-shaped cantilevered collector; and a ring-shaped distributor disposed in the annulus column region above or below the plurality of structured packing elements. The thermal expansion and contraction of the second annular column wall in a radial direction and in an axial direction is independent of the thermal expansion and contraction of the first annular column wall in the radial and axial directions.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: March 3, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kevin J. Saboda, Paul W. Belanger, Richard D. Lenz, Kirk F. Larson, Steven C. Brown, John P. Ricotta, Guang X. Chen, Jeremy D. Faust
  • Gas delivery valve and methods of use thereof
    Patent number: 10564656
    Abstract: A novel and improved inventive valve with a regulating function is provided that is capable of filling to higher fill pressures than previously attainable with conventional C-10 “on-off” valves. The valve contains a single flow passageway by which gas dispenses and enters the valve. A fill adapter is specially configured to engage the valve to allow filling at the higher pressures along the single flow passageway. The structure of the valve allows greater utilization of cylinder capacity; simplifies filling and dispensing with the single flow passageway; and allows for regulating gas pressure during delivery without increasing the overall size of the cylinder package.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: February 18, 2020
    Assignees: Praxair Technology, Inc., Sherwood Valve, LLC
    Inventors: Douglas C Heiderman, Ashwini K Sinha, Michael McBearty, John Piscitelli
  • Method for compressing an incoming feed air stream in a cryogenic air separation plant
    Patent number: 10533564
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: January 14, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Thermochemical regeneration with soot formation
    Patent number: 10533743
    Abstract: Operation of a thermochemical regenerator to generate soot or to increase the amount of soot generated improves the performance of a furnace with which the thermochemical regenerator is operated.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: January 14, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Kuang-Tsai Wu, Hisashi Kobayashi
  • Method for compressing an incoming feed air stream in a cryogenic air separation plant
    Patent number: 10533565
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: January 14, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Burner with baffle
    Patent number: 10520187
    Abstract: In a burner in which fuel and gaseous oxidant are fed into the burner and combusted to produce a flame that extends out of an end of the burner, the noise produced by the burner is lessened by incorporating into the burner a baffle composed of a metal plate having a certain distribution of holes through the plate and a layer of metal filaments, and optionally a second metal plate.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: December 31, 2019
    Assignee: Praxair Technology, Inc.
    Inventors: Poravee Orawannukul, Reh-Lin Chen, Bradley D Damstedt
  • Method for applying a slurry coating onto a surface of an inner diameter of a conduit
    Patent number: 10520265
    Abstract: A method for creating a coating onto an inner diameter of conduit, whereby an injection nozzle is moved in a forward direction until its tip is aligned with the end of the conduit. Slurry is pumped from a reservoir into the injection nozzle and then is discharged through the tip of the injection nozzle. The slurry flows, distributes and spreads onto the surface of the conduit. The conduit is rotated and the nozzle is retracted as slurry continues to discharge from the nozzle to coat the remainder of the conduit.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: December 31, 2019
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Sang Muk Kwark, Zigui Lu, David P. Potempa, Maulik R. Shelat