Patents Assigned to Air Products and Chemicals, Inc.
  • Patent number: 10781499
    Abstract: A method of operating a BOF bottom stir tuyere having an inner nozzle surrounded by an annular nozzle, including during a hot metal pour phase and a blow phase, flowing an inert gas through both nozzles; during a tap phase, initiating a flow of a first reactant through the inner nozzle and a flow of a second reactant through the annular nozzle, and ceasing the flow of inert gas through the nozzles, wherein the first and second reactants includes fuel and oxidant, respectively, or vice-versa, such that a flame forms as the fuel and oxidant exit the tuyere; during a slag splash phase, continuing the flows of fuel and oxidant to maintain the flame; and after ending the slag splash phase and commencement of another hot metal pour phase, initiating a flow of inert gas through both nozzles and ceasing the flows of the first and second reactants.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: September 22, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Gregory J. Buragino, Shailesh Pradeep Gangoli, Anshu Gupta, Anup Vasant Sane, Avishek Guha, Xiaoyi He, Michael David Buzinski, Kyle J. Niemkiewicz, Russell James Hewertson
  • Patent number: 10781384
    Abstract: A gasification system for the oxidation of a carbonaceous feedstock to provide a synthesis gas comprising: a reactor chamber for oxidizing the carbonaceous feedstock; a quench section for holding a bath of liquid coolant; an intermediate section having a reactor outlet opening through which the synthesis gas is conducted from the reactor chamber into the bath of the quench section; at least one layer of refractory bricks arranged on the reactor chamber floor, the lower end section of the refractory bricks enclosing the reactor outlet opening and defining the inner diameter thereof; the intermediate section including a number of halved tubes for liquid coolant arranged onto at least part of the reactor chamber floor on a side thereof opposite to the lower end section of the refractory bricks; and a pump system for circulating the liquid coolant through the halved tubes on the reactor chamber floor.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: September 22, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Sijing Liu, Manfred Heinrich Schmitz-Goeb, Anthony Wolfert, Unai Jauregi, Joachim Ottomar Wolff
  • Patent number: 10767858
    Abstract: A gasification reactor comprises a pressure shell; a reaction zone partly bounded by a tubular membrane wall enclosed by the pressure shell; at least one burner having a burner head, said burner head protruding the membrane wall; at least one cooling device arranged in the membrane wall and enclosing the burner head of at least one burner, the at least one cooling device comprising several concentric rings of increasing diameter, forming a truncated cone shape having a largest diameter opening facing the reaction zone and a smallest diameter opening facing the burner head, each ring being a conduit having an inlet and an outlet for a cooling medium, the smallest diameter opening for the burner head being located between the pressure shell and the membrane wall; the cooling device comprising at least one part-circular outer ring having an interruption.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: September 8, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Alfons Heitmann, Roland Reimesch, Thomas Paul Von Kossak-Glowczewski
  • Patent number: 10767922
    Abstract: A method and apparatus for liquefying a natural gas feed stream and removing nitrogen therefrom to produce a nitrogen-depleted LNG product, in which a natural gas feed stream is fed into the warm end of a main heat exchanger, cooled and at least partially liquefied, withdrawn from an intermediate location of the main heat exchanger and separated to form a nitrogen-enriched natural gas vapor stream and a nitrogen-depleted natural gas liquid stream, the liquid and vapor streams being reintroduced into an intermediate location of the main heat exchanger and further cooled in parallel to form a first LNG stream and a first at least partially liquefied nitrogen-enriched natural gas stream, respectively.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: September 8, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Fei Chen, Yang Liu, Gowri Krishnamurthy, Christopher Michael Ott, Mark Julian Roberts
  • Patent number: 10765991
    Abstract: A rapid cycle pressure swing adsorption (RCPSA) air purification process, apparatus, and device for the removal of at least one of water, carbon dioxide, nitrous oxide, and one or more hydrocarbons from a feed air stream prior to cryogenic air separation.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: September 8, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Jinzhong Liu, Wu Li, Timothy Christopher Golden
  • Patent number: 10760017
    Abstract: A gasification system for the partial oxidation of a carbonaceous feedstock to at least provide a synthesis gas, comprising: a reactor chamber for receiving and partially oxidizing the carbonaceous feedstock; a quench chamber below the floor of the reactor chamber for holding a bath of liquid coolant; an intermediate section at said reactor chamber floor, the intermediate section having a reactor outlet opening through which the reactor chamber communicates with the quench chamber to conduct the synthesis gas from the reactor chamber into the bath of the quench chamber; at least one layer of refractory bricks arranged on and supported by the reactor chamber floor, the lower end section of the refractory bricks enclosing the reactor outlet opening and defining the inner diameter thereof; and a dip tube extending from the reactor outlet opening to the bath of the quench chamber, the dip tube having a widened top section.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: September 1, 2020
    Assignee: Air Products & Chemicals, Inc.
    Inventors: Manfred Heinrich Schmitz-Goeb, Paul Christian Karzel
  • Patent number: 10753676
    Abstract: Systems and methods described for increasing capacity and efficiency of natural gas liquefaction processes having a mixed refrigerant precooling system with multiple pressure levels comprising cooling the compressed mixed refrigerant stream and separating the cooled compressed mixed refrigerant stream into a vapor and liquid portion. The liquid portion provides refrigeration duty to a first precooling heat exchanger. The vapor portion is further compressed, cooled, and condensed, and used to provide refrigeration duty to a second precooling heat exchanger. A flash gas separated from the liquefied natural gas is warmed and combined with the natural gas feed stream.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: August 25, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Gowri Krishnamurthy, Mark Julian Roberts, Adam Adrian Brostow
  • Patent number: 10746470
    Abstract: A method of operating a furnace having process tubes and multiple burners where it is desired to conform the temperatures of the process tubes to selected target temperature criterion. The present method provides a systematic and quantitative approach to determine how to adjust burner flow rates to result in desired tube wall temperatures, for example, using objective functions to decrease the probability that temperatures pertaining to the plurality of process tubes exceed their selected limit temperatures. An objective function can also be used to reduce the excess oxidant requirement for the furnace.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: August 18, 2020
    Assignee: Air Products & Chemicals, Inc.
    Inventors: Ali Esmaili, Hu Li, Matthew James Labuda, Joshua David Isom
  • Patent number: 10744450
    Abstract: Disclosed herein are multi-bed rapid cycle pressure swing adsorption (RCPSA) processes for separating O2 from N2 and/or Ar, wherein the process utilizes at least five adsorption beds each comprising a kinetically selective adsorbent for O2 having an O2 adsorption rate (1/s) of at least 0.20 as determined by linear driving force model at 1 atma and 86° F.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 18, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Shubhra Jyoti Bhadra, Roger Dean Whitley, Timothy Christopher Golden, Dingjun Wu, Glenn Paul Wagner
  • Patent number: 10730142
    Abstract: Methods and systems for controlling gas atmospheres in three-dimensional laser printing and weld overlay consolidation operations using metallic powders are provided. In one or more embodiments, such systems and methods comprise a printing chamber or laser weld overlay system, a gas supply system, a feed powder system, and one or more sensors employed to control the printing or welding operation. The methods and systems of the invention employ one or more inert gases having a purity greater than or equal to 99.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: August 4, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Zbigniew Zurecki, Ranajit Ghosh
  • Patent number: 10730006
    Abstract: Disclosed herein is a stator plate for a rotary bed PSA apparatus that has an exhaust slot that has first and second sections for receiving blowdown and purge exhaust gas streams, the sections being separated by a flow restriction that restricts but does not full prevent gas flow between the sections, or that has separate exhaust slots for separately receiving the blowdown and purge exhaust gas streams. Also disclosed is pressure swing adsorption (PSA) apparatus including such a stator plate, and a rotary bed PSA process using such an apparatus.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 4, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Glenn Paul Wagner, Xue Mei Liu, Jinzhong Liu, Roger Dean Whitley, Shubhra Jyoti Bhadra, Michael Jamie McKerrow
  • Publication number: 20200232707
    Abstract: A method and an apparatus for nitriding metal articles, wherein the nitriding potential of the nitriding atmosphere is controlled as a function of the molecular weights of the inlet and outlet gases from the nitriding apparatus, as measured by molecular weight sensors located outside (external to) the furnace chamber.
    Type: Application
    Filed: January 17, 2019
    Publication date: July 23, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Liang He, Guido Plicht, Ranajit Ghosh, Donald James Bowe
  • Publication number: 20200217585
    Abstract: A system and method for increasing the efficiency of natural gas liquefaction processes by using a hybrid cooling system and method. More specifically, a system and method for converting a transcritical precooling refrigeration process to a subcritical process. In one embodiment, the refrigerant is cooled to sub-critical temperature using an economizer. In another embodiment, the refrigerant is cooled to a sub-critical temperature using an auxiliary heat exchanger. Optionally, the economizer or auxiliary heat exchanger can be bypassed when ambient temperatures are sufficiently low to cool the refrigerant to a sub-critical temperature. In another embodiment, the refrigerant is isentropically expanded.
    Type: Application
    Filed: March 23, 2020
    Publication date: July 9, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Gowri Krishnamurthy, Mark Julian Roberts
  • Patent number: 10703629
    Abstract: Process and apparatus for producing a hydrogen-containing product by steam-hydrocarbon reforming of multiple hydrocarbon feedstocks in a production facility utilizing a prereformer in addition to the primary reformer. The temperature of the reactant mixture introduced into the prereformer is controlled depending on the composition of the reactant mixture fed to the prereformer.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: July 7, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Simon Craig Saloway
  • Publication number: 20200200471
    Abstract: A liquefaction system is capable of sequentially or simultaneously liquefying multiple feed streams of hydrocarbons having different normal bubble points with minimal flash. The liquefying heat exchanger has separate circuits for handling multiple feed streams. The feed stream with the lowest normal boiling point is sub-cooled sufficiently to suppress most of the flash. Feed streams with relatively high normal boiling points are cooled to substantially the same temperature, then blended with bypass streams to maintain each product near its normal bubble point. The system can also liquefy one stream at a time by using a dedicated circuit or by allocating the same feed to multiple circuits.
    Type: Application
    Filed: March 2, 2020
    Publication date: June 25, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Laurent Marc Brussol, David Joseph Holzer, Sylvain Vovard, Russell Shnitser, Adam Adrian Brostow, Mark Julian Roberts
  • Patent number: 10669609
    Abstract: A method of melting an aluminum charge having no more that 4% salt by mass, including during a melting phase, introducing fuel and oxidant via a burner operating at a first firing rate, the fuel and oxidant reacting to form a combustion zone above the aluminum charge, terminating the melting phase and commencing a transition phase when the aluminum charge is nearly completely molten, during the transition phase, reducing the firing rate of the burner to a second firing rate lower than the first firing rate, introducing a non-oxidizing gas at a first velocity to form a non-oxidizing zone between the combustion zone and the aluminum charge, and allowing the aluminum charge to become completely molten, and terminating the transition phase and commencing a tapping phase after the aluminum charge has become completely molten, and during the tapping phase, pouring the molten aluminum charge out of the furnace.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: June 2, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Martin Lawrence, Petr Tlamicha
  • Patent number: 10663220
    Abstract: Systems and methods described for increasing capacity and efficiency of natural gas liquefaction processes having a mixed refrigerant precooling system with multiple pressure levels comprising cooling the compressed mixed refrigerant stream and separating the cooled compressed mixed refrigerant stream into a vapor and liquid portion. The liquid portion provides refrigeration duty to a first precooling heat exchanger. The vapor portion is further compressed, cooled, and condensed, and used to provide refrigeration duty to a second precooling heat exchanger. Optionally additional precooling heat exchangers, and/or phase separators may be used.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: May 26, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Gowri Krishnamurthy, Mark Julian Roberts
  • Patent number: 10654024
    Abstract: Disclosed are novel, as-crystallized RHO zeolite compositions with improved uniformity in morphology. These RHO compositions are useful for preparing cation-exchanged RHO zeolites that can be used as adsorbents for oxygen and/or nitrogen with improved properties. The adsorbents can be used in pressure swing adsorption processes for selectively adsorbing oxygen and/or nitrogen from feed streams such as an air stream or crude argon stream. Also disclosed are novel methods of preparing RHO zeolites with improved morphology control.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: May 19, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Elizabeth M. Seibel, William Jack Casteel, Jr., Garret Chi-Ho Lau, Roger Dean Whitley
  • Patent number: 10655912
    Abstract: Impurities that are less volatile than carbon dioxide, e.g. hydrogen sulfide, are removed from crude carbon dioxide by processes involving distillation of said crude carbon dioxide in a distillation column system operating at super-atmospheric pressure(s) to produce carbon dioxide-enriched overhead vapor and bottoms liquid enriched with said impurities. Where such processes involve a single heat pump cycle, significant savings in power consumption are realized when the distillation column system is re-boiled by at least partially vaporizing liquid in or taken from an intermediate location in the column system.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: May 19, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Paul Higginbotham, John Eugene Palamara, Galip Hakan Guvelioglu
  • Patent number: 10646848
    Abstract: Disclosed herein are novel RHO zeolites useful as kinetically selective adsorbents for oxygen and/or nitrogen. The adsorbents can be used in pressure swing adsorption processes for selectively adsorbing oxygen and/or nitrogen from feed streams such as an air stream or crude argon stream. Also disclosed are novel methods of preparing RHO zeolites, including in particular mixed-cation RHO zeolites.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: May 12, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Magdalena M. Lozinska, Paul A. Wright, Elliott L. Bruce, William Jack Casteel, Jr., Shubhra Jyoti Bhadra, Robert Quinn, Garret Chi-Ho Lau, Erin Marie Sorensen, Roger Dean Whitley, Timothy Christopher Golden, Mohammad Ali Kalbassi