Patents Assigned to Praxair Technology, Inc.
  • Annular divided wall column
    Patent number: 10866026
    Abstract: An annular divided wall column 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, disposed within the interior core column region within the annulus column region having different surface area densities and optionally, also have different geometries.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: December 15, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kirk F. Larson, Paul W. Belanger, Steven C. Brown, John P. Ricotta, Guang X. Chen, Richard D. Lenz
  • Annular divided wall column with ring shaped collectors and distributers
    Patent number: 10866025
    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: January 13, 2020
    Date of Patent: December 15, 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
  • Reduced fouling in staged combustion
    Patent number: 10859260
    Abstract: In staged combustion, wherein fuel is fed into a furnace, and less than all of the gaseous oxidant needed to completely combust the fuel is fed with the fuel and combusted, providing uncombusted fuel, and the remaining portion of gaseous oxidant needed to combust the fuel is fed into the furnace through a second port, fuel is fed and combusted at the second port to heat the second port and lessen the tendency of deposits to form at the second port.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: December 8, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Osemwengie Uyi Iyoha, Jesse E Cates
  • Process for making and supplying a high quality fracturing fluid
    Patent number: 10829683
    Abstract: The present invention relates to a proppant laden fracture fluid having a Mitchell quality of at least 50% and fracturing a subterranean formation therewith.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: November 10, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Richard M Kelly, Afshin Esmaeil Zadeh, Mark K Weise
  • Method and system for oxygen transport membrane enhanced integrated gasifier combined cycle (IGCC)
    Patent number: 10822234
    Abstract: A system and method for oxygen transport membrane enhanced Integrated Gasifier Combined Cycle (IGCC) is provided. The oxygen transport membrane enhanced IGCC system is configured to generate electric power and optionally produce a fuel/liquid product from coal-derived synthesis gas or a mixture of coal-derived synthesis gas and natural gas derived synthesis gas.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: November 3, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Sean M. Kelly, Shrikar Chakravarti, Raymond F. Drnevich
  • System and method for high recovery of nitrogen and argon from a moderate pressure cryogenic air separation unit
    Patent number: 10816263
    Abstract: A moderate pressure air separation unit and air separation cycle is disclosed that provides for up to about 96% recovery of argon and an overall nitrogen recovery of 98% or greater. The air separation is configured to produce a high purity oxygen enriched stream 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 prepurifier unit. Argon recovery is facilitated with the use of an argon superstaged column.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: October 27, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Neil M. Prosser, James R. Handley, Brian R. Kromer
  • Refrigeration cycle for liquid oxygen densification
    Patent number: 10808967
    Abstract: Closed-loop refrigeration cycles for liquid oxygen densification are disclosed. The disclosed refrigeration cycles may be turbine-based refrigeration cycles or a Joule-Thompson (JT) expansion valve based refrigeration cycles and include a refrigerant or working fluid comprising a mixture of neon or helium together with nitrogen and/or oxygen.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: October 20, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Neil M. Prosser, James R. Dray, Paul W. Belanger, Maulik R. Shelat
  • Mid-range purity oxygen by adsorption
    Patent number: 10799827
    Abstract: The present invention relates to a process cycle that allows for the stable production of mid-range purity oxygen from air, using traditional system designs. Typical cycles have a limited production benefit when generating O2 at lower than 90% purity, however they suffer a production loss at higher purity. The process cycles of the invention are capable of producing significantly more contained O2 at a lower purity. In addition to enhanced production capacity, lower power consumed per mass of product and more stable product purity and flow are realized by the process of the invention compared to traditional alternatives.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: October 13, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Nicholas R. Stuckert, Yang Luo
  • Process for generating higher VPSA product pressure
    Patent number: 10792610
    Abstract: The invention relates to a process for modifying the VPSA/VSA/PSA cycle to allow for maximum product pressure without the need for a base load oxygen compressor (BLOC) or base load oxygen blower (BLOB), thus supplying low pressure oxygen (3 to 7 Psig) to the end user while at the same time lowering product costs 10 to 30%. The system of this invention preferably employs larger piping runs from the VPSA to the oxy-fuel control skids, larger piping for the oxy-fuel control skid, larger piping for the VPSA, low pressure drop flow measurements, and low pressure drop check valves.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: October 6, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Nicholas R. Stuckert, Yang Luo, Osemwengie Uyi Iyoha, Jeffrey Abbatiello, Timothy M. Aaron
  • Integrated process and unit operation for conditioning a soot-containing syngas
    Patent number: 10793797
    Abstract: The present invention relates to a method for conditioning a soot-containing syngas stream in a single integrated apparatus containing a scrubbing vessel wherein particulate matter is decoupled from the waste water stream.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: October 6, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Luke Coleman, Minish Mahendra Shah, Joseph Schwartz, Jerome Jankowiak
  • Method and system for treating a flow back fluid exiting a well site
    Patent number: 10787615
    Abstract: The present invention relates to a method and system for treating a flow back fluid exiting a well site following stimulation of a subterranean formation. More specifically, the invention relates to processing the flow back fluid, and separating into a carbon dioxide rich stream and a carbon dioxide depleted stream, and continuing the separation until the carbon dioxide concentration in the flow back stream until the carbon dioxide concentration in the flow back gas diminishes to a point selected in a range of about 50-80 mol % in carbon dioxide concentration, after which the lower concentration carbon dioxide flow back stream continues to be separated into a carbon dioxide rich stream which is routed to waste or flare, and a hydrocarbon rich stream is formed.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: September 29, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kenneth L. Burgers, Raymond F. Drnevich, Minish M. Shah, David R. Thompson
  • Method of determining diametrical growth of reformer tubes
    Patent number: 10767980
    Abstract: The present invention relates to modifying a reformer tube to facilitate regular tube inspections to assess the service life and subsequently predict its remaining life accurately.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: September 8, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Apratim Bhattacharya, Kang Xu, Troy M Raybold, Minish Mahendra Shah
  • Regenerators with pressurized cavity in partition walls
    Patent number: 10746469
    Abstract: A pressurized cavity is provided around at least a portion or all of a regenerator, within which gas such as flue gas is maintained at a pressure in excess of the pressure within the regenerator, to protect against leakage of gas through the walls of the regenerator.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: August 18, 2020
    Assignee: Praxair Technology, Inc.
    Inventor: Hisashi Kobayashi
  • Tail gas heating within PSA surge tank
    Patent number: 10745276
    Abstract: The present invention relates to a method of improving the efficiency of an integrated hydrogen generation system by the introduction of a means to heat the PSA tail gas within the PSA surge tank.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: August 18, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Andrew Warta, Bryan S Kalp, Troy M Raybold, Raymond F Dmevich
  • System and method for feeding gas into liquid
    Patent number: 10744468
    Abstract: Disclosed are a system and a method for dissolving water-soluble gas such as oxygen into water, employing microporous membrane.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: August 18, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Alan T Cheng, Yeu-Chuan Simon Ho, Balazs Hunek
  • Oxygen injection in fluid bed ore concentrate roasting
    Patent number: 10745777
    Abstract: Oxygen is injected into the windbox of a fluidized bed ore roaster to form a fluidizing and oxidizing gas stream of elevated oxygen content which is fed into only the feed zone into which the ore to be fluidized is fed.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: August 18, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC
    Inventors: William J Mahoney, Ahmed F Abdelwahab, Jeffrey C Mocsari, Wim Coessens, Dany BourdeaudHuy, Ozhan Turgut
  • Tunable adsorbents
    Patent number: 10717035
    Abstract: The present invention relates to a method for modifying the crystalline inorganic framework of an adsorbent with coatings to provide rate selectivity for one gas over others is described. The method described herein narrows the effective pore size of crystalline porous solids with pores less than about 5A for rate selective separations. This method of the invention comprises treating the hydrated or partially hydrated zeolite with a silicone derived binding agent followed by subsequent heat treatment. The additive content and treatment are adjusted to match effective pore size to specific separations. The superior adsorbent has the added convenience of bead forming simultaneously with pore modification as well as having the treatment result in the yielding of high crush strength products.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: July 21, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Steven J. Pontonio, Neil A. Stephenson, Philip A. Barrett, Nicholas R. Stuckert
  • Reduction of regenerator clogging
    Patent number: 10712092
    Abstract: A thermochemical regenerator system is operated without encountering accumulation of unwanted solids on the interior surfaces of the passages through which flue gas passes.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: July 14, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Hisashi Kobayashi, Kuang-Tsai Wu
  • Transportable container, charger system, method and kit for generation of carbon dioxide snow block in-situ within the transportable container for preservation of items stored therewithin
    Patent number: 10712072
    Abstract: This invention relates to a novel kit, transportable apparatus and method for generating in-situ CO2 snow block within the apparatus. An item such as a biological sample can be stored and transported within the same apparatus that is employed for creating the CO2 snow block. The apparatus is capable of preserving the sample during transport. The invention also includes a specially designed CO2 snow charger system including a charger and meshed conduit. The charger system is operated in accordance with the methods of the present invention to create the in-situ CO2 snow block within a container that can be also used for transport.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: July 14, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Ying Zhou, Ranko Bursac, Robert R Sever
  • Support assembly for a gas cylinder
    Patent number: D898318
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: October 6, 2020
    Assignee: Praxair Technology, Inc.
    Inventors: Mayank Pareek, Ashwini K Sinha, Stanely M Smith, Ranko Bursac, Amber L Boll, Merry Riehm-Constantino, Amy Beth Hangen