Patents by Inventor Martin Møllerhøj

Martin Møllerhøj 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: 11807527
    Abstract: A process and a process plant for production of elemental sulfur from a feedstock gas including from 15 vol % to 100 vol % H2S and a stream of sulfuric acid, the process including a) providing a Claus reaction furnace feed stream with a substoichiometric amount of oxygen, b) directing s to a reaction furnace operating at elevated temperature, c) cooling, d) directing to contact a material catalytically active in the Claus reaction, e) withdrawing a Claus tail gas and elemental sulfur, f) directing to a means for sulfur oxidation, g) directing to contact a material catalytically active in SO2 oxidation to SO3, h) converting to concentrated sulfuric acid, i) recycling to the Claus reaction furnace, wherein an amount of combustibles, in the Claus tail gas, is oxidized in the presence of a material catalytically active in sulfur oxidation, at an inlet temperature below 400° C.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: November 7, 2023
    Assignee: HALDOR TOPSØE A/S
    Inventors: Morten Thellefsen, Martin Møllerhøj, Mads Lykke
  • Patent number: 11691877
    Abstract: A process plant and a process for production of sulfur from a feedstock gas including from 15% to 100 vol % H2S and a stream of sulfuric acid, the process including a) providing a Claus reaction furnace feed stream with a substoichiometric amount of oxygen, b) directing to a Claus reaction furnace operating at elevated temperature, c) cooling to provide a cooled Claus converter feed gas, d) directing to contact a material catalytically active in the Claus reaction, e) withdrawing a Claus tail gas and elementary sulfur, f) directing a stream comprising said Claus tail gas to a Claus tail gas treatment, wherein sulfuric acid directed to said Claus reaction furnace is in the form of droplets with 90% of the mass of the droplets having a diameter below 500 ?m, with the associated benefit of such a process efficiently converting all liquid H2SO4 to gaseous H2SO4 and further to SO2.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: July 4, 2023
    Assignee: HALDOR TOPSØE A/S
    Inventors: Morten Thellefsen, Per Aggerholm Sørensen, Martin Møllerhøj, Mads Lykke
  • Patent number: 11618677
    Abstract: A revamp process for modifying a sulfur abatement plant including a Claus process plant, the Claus process plant including a Claus reaction furnace and one or more Claus conversion stages, each Claus conversion stage including a conversion reactor and a means for elemental sulfur condensation, and a means of Claus tail gas oxidation configured for receiving a Claus tail gas from said Claus process plant and configured for providing an oxidized Claus tail gas, the process revamp including: a) providing a sulfuric acid producing tail gas treatment plant producing sulfuric acid, and b) providing a means for transferring an amount or all of the sulfuric acid produced in said sulfuric acid producing tail gas treatment plant to said Claus reaction furnace, wherein the moles of sulfur in the transferred sulfuric acid relative to the moles of elemental sulfur withdrawn from the Claus process plant is from 3% to 25%.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: April 4, 2023
    Assignee: HALDOR TOPSØE A/S
    Inventors: Morten Thellefsen, Mads Lykke, Martin Møllerhøj
  • Patent number: 11543120
    Abstract: In a method for cooling of process gas between catalytic layers or beds in a sulfuric acid plant, in which sulfuric acid is produced from feed gases containing sulfurous components like SO2, H2S, CS2 and COS or liquid feeds like molten sulfur or spent sulfuric acid, one or more boilers, especially water tube boilers, are used instead of conventional steam superheaters to cool the process gas between the catalytic beds in the SO2 converter of the plant. Thereby a less complicated and more cost efficient heat exchanger layout is obtained.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: January 3, 2023
    Assignee: HALDOR TOPSØE A/S
    Inventors: Mads Lykke, Martin Møllerhøj
  • Publication number: 20220234891
    Abstract: A process and a process plant for production of elemental sulfur from a feedstock gas including from 15 vol % to 100 vol % H2S and a stream of sulfuric acid, the process including a) providing a Claus reaction furnace feed stream with a substoichiometric amount of oxygen, b) directing s to a reaction furnace operating at elevated temperature, c) cooling, d) directing to contact a material catalytically active in the Claus reaction, e) withdrawing a Claus tail gas and elemental sulfur, f) directing to a means for sulfur oxidation, g) directing to contact a material catalytically active in SO2 oxidation to SO3, h) converting to concentrated sulfuric acid, i) recycling to the Claus reaction furnace, wherein an amount of combustibles, in the Claus tail gas, is oxidized in the presence of a material catalytically active in sulfur oxidation, at an inlet temperature below 400° C.
    Type: Application
    Filed: April 29, 2020
    Publication date: July 28, 2022
    Applicant: HALDOR TOPSØE A/S
    Inventors: Morten THELLEFSEN, Martin MØLLERHØJ, Mads LYKKE
  • Publication number: 20220219983
    Abstract: A sulfuric acid recirculation loop and a standalone sulfuric acid concentrator including: a concentrator column, an air lift pump having a liquid inlet fed with concentrated sulfuric acid from the outlet of a sulfuric acid reservoir downstream the concentrator column, a gas inlet fed with a carrier fluid having a lower density than the concentrated sulfuric acid, and an outlet, wherein the sulfuric acid reservoir is located below the concentrator column and above the carrier fluid inlet of the air lift pump, a downcomer pipe leading down from the sulfuric acid reservoir to the liquid inlet of the air lift pump, and a riser pipe leading up from the carrier fluid inlet on the air lift pump to an inlet pipe for the concentrator column, the inlet pipe being configured for allowing a liquid flow from the inlet to the outlet.
    Type: Application
    Filed: July 10, 2020
    Publication date: July 14, 2022
    Applicant: HALDOR TOPSØE A/S
    Inventors: Martin MØLLERHØJ, Morten THELLEFSEN
  • Publication number: 20220177306
    Abstract: A revamp process for modifying a sulfur abatement plant including a Claus process plant, the Claus process plant including a Claus reaction furnace and one or more Claus conversion stages, each Claus conversion stage including a conversion reactor and a means for elemental sulfur condensation, and a means of Claus tail gas oxidation configured for receiving a Claus tail gas from said Claus process plant and configured for providing an oxidized Claus tail gas, the process revamp including: a) providing a sulfuric acid producing tail gas treatment plant producing sulfuric acid, and b) providing a means for transferring an amount or all of the sulfuric acid produced in said sulfuric acid producing tail gas treatment plant to said Claus reaction furnace, wherein the moles of sulfur in the transferred sulfuric acid relative to the moles of elemental sulfur withdrawn from the Claus process plant is from 3% to 25%.
    Type: Application
    Filed: April 29, 2020
    Publication date: June 9, 2022
    Applicant: HALDOR TOPSØE A/S
    Inventors: Morten THELLEFSEN, Mads LYKKE, Martin MØLLERHØJ
  • Publication number: 20220177307
    Abstract: A process plant and a process for production of sulfur from a feedstock gas including from 15% to 100 vol % H2S and a stream of sulfuric acid, the process including a) providing a Claus reaction furnace feed stream with a substoichiometric amount of oxygen, b) directing to a Claus reaction furnace operating at elevated temperature, c) cooling to provide a cooled Claus converter feed gas, d) directing to contact a material catalytically active in the Claus reaction, e) withdrawing a Claus tail gas and elementary sulfur, f) directing a stream comprising said Claus tail gas to a Claus tail gas treatment, wherein sulfuric acid directed to said Claus reaction furnace is in the form of droplets with 90% of the mass of the droplets having a diameter below 500 ?m, with the associated benefit of such a process efficiently converting all liquid H2SO4 to gaseous H2SO4 and further to SO2.
    Type: Application
    Filed: April 30, 2020
    Publication date: June 9, 2022
    Applicant: HALDOR TOPSØE A/S
    Inventors: Morten THELLEFSEN, Per Aggerholm SØRENSEN, Martin MØLLERHØJ, Mads LYKKE
  • Publication number: 20200149735
    Abstract: In a method for cooling of process gas between catalytic layers or beds in a sulfuric acid plant, in which sulfuric acid is produced from feed gases containing sulfurous components like SO2, H2S, CS2 and COS or liquid feeds like molten sulfur or spent sulfuric acid, one or more boilers, especially water tube boilers, are used instead of conventional steam superheaters to cool the process gas between the catalytic beds in the SO2 converter of the plant. Thereby a less complicated and more cost efficient heat exchanger layout is obtained.
    Type: Application
    Filed: June 26, 2018
    Publication date: May 14, 2020
    Applicant: HALDOR TOPSØE A/S
    Inventors: Mads LYKKE, Martin MØLLERHØJ
  • Patent number: 10640376
    Abstract: Sulfur trioxide is produced from a feed stream comprising sulfur-containing compounds and dissolved metals, such as alkali metals, in a plant comprising an incineration furnace, a waste heat boiler, a dilution air heater, a dust removal absorber and an SO2 converter. The plant may further comprise a sulfuric acid condenser for the production of sulfuric acid.
    Type: Grant
    Filed: July 4, 2017
    Date of Patent: May 5, 2020
    Assignee: Haldor Topsoe A/S
    Inventors: Morten Thellefsen, Martin Møllerhøj
  • Publication number: 20200062594
    Abstract: In a process for increasing the sulfuric acid concentration of 90-98 wt % sulfuric acid, comprising stripping water from the sulfuric acid by contacting it with hot stripping media in a sulfuric acid concentrator column to increase the concentration of the acid leaving the column, the concentration of the acid is increased further by recycling a fraction of the acid, which is leaving the column, through an acid recirculation loop back to the inlet of the column, and the acid is optionally heated during its passage through the acid recirculation loop.
    Type: Application
    Filed: December 8, 2017
    Publication date: February 27, 2020
    Applicant: HALDOR TOPSØE A/S
    Inventor: Martin MØLLERHØJ
  • Patent number: 10532930
    Abstract: A plant for the production of sulfur trioxide from a feed stream containing sulfur-containing compounds and dissolved metals and alkali metals by a process, which involves gas quenching, comprises an incineration furnace, a mixing device and/or a dilution air heater, a dust removal device and an SO2 converter. The plant may further comprise a condenser for the purpose of producing sulfuric acid.
    Type: Grant
    Filed: July 4, 2017
    Date of Patent: January 14, 2020
    Assignee: Haldor Topsoe A/S
    Inventors: Morten Thellefsen, Martin Møllerhøj
  • Publication number: 20190308879
    Abstract: A plant for the production of sulfur trioxide from a feed stream containing sulfur-containing compounds and dissolved metals and alkali metals by a process, which involves gas quenching, comprises an incineration furnace, a mixing device and/or a dilution air heater, a dust removal device and an SO2 converter. The plant may further comprise a condenser for the purpose of producing sulfuric acid.
    Type: Application
    Filed: July 4, 2017
    Publication date: October 10, 2019
    Applicant: Haldor Topsøe A/S
    Inventors: Morten Thellefsen, Martin Møllerhøj
  • Publication number: 20190177161
    Abstract: Sulfur trioxide is produced from a feed stream comprising sulfur-containing compounds and dissolved metals, such as alkali metals, in a plant comprising an incineration furnace, a waste heat boiler, a dilution air heater, a dust removal absorber and an SO2 converter. The plant may further comprise a sulfuric acid condenser for the production of sulfuric acid.
    Type: Application
    Filed: July 4, 2017
    Publication date: June 13, 2019
    Applicant: Haldor Topsøe A/S
    Inventors: Morten Thellefsen, Martin Møllerhøj
  • Patent number: 9487401
    Abstract: The present invention relates to a process plant for the oxidation of SO2 to SO3 in a process gas, said process plant comprising a heat exchanger configured for heating the process gas by heat exchange with an oxidized process gas and/or a further oxidized process gas by providing thermal contact between said process gas and said oxidized process gas and/or said further oxidized process gas, a first zone of material catalytically active in oxidation of SO2 to SO3, and a boiler configured for containing steam being heated by the oxidized process gas and/or the further oxidized process after said oxidized process gas has been cooled in the heat exchanger characterized in the cooled oxidized process gas in the boiler being non-condensing with the benefit of providing the possibility for a smaller heat exchanger which may be made with only moderate corrosion resistant materials, compared to a process plant according to the prior art, as well as a related process.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: November 8, 2016
    Assignee: Haldor Topsoe A/S
    Inventor: Martin Møllerhøj
  • Publication number: 20150147266
    Abstract: The present invention relates to a process plant for the oxidation of SO2 to SO3 in a process gas, said process plant comprising a heat exchanger configured for heating the process gas by heat exchange with an oxidized process gas and/or a further oxidized process gas by providing thermal contact between said process gas and said oxidized process gas and/or said further oxidized process gas, a first zone of material catalytically active in oxidation of SO2 to SO3, and a boiler configured for containing steam being heated by the oxidized process gas and/or the further oxidized process after said oxidized process gas has been cooled in the heat exchanger characterized in the cooled oxidized process gas in the boiler being non-condensing with the benefit of providing the possibility for a smaller heat exchanger which may be made with only moderate corrosion resistant materials, compared to a process plant according to the prior art, as well as a related process.
    Type: Application
    Filed: June 3, 2013
    Publication date: May 28, 2015
    Applicant: Haldor Topsøe A/S
    Inventor: Martin Møllerhøj
  • Patent number: 8951494
    Abstract: A process for the conversion of sulphur dioxide contained in a feed gas to sulphur trioxide, comprising the steps of a) alternatingly providing a first feed gas containing a high concentration of sulphur dioxide and a second feed gas containing a low concentration of sulphur dioxide as a process gas, b) preheating the process gas by heat exchange with a heat exchange medium, c) reacting the process gas in the presence of a catalytically active material in a catalytic reaction zone, d) converting at least in part the sulphur dioxide of the process gas into sulphur trioxide contained in a product gas in the catalytic reaction zone, e) cooling the product gas by contact with a heat exchange medium, wherein a thermal buffer zone is provided in relation to one of said process steps, providing thermal energy produced during super-autothermal operation for heating the process gas during sub-autothermal operation.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: February 10, 2015
    Assignee: Haldor Topsoe A/S
    Inventors: Martin Møllerhøj, Mads Lykke, Morten Thellefsen, Peter Schoubye
  • Publication number: 20130058854
    Abstract: A process for the conversion of sulphur dioxide contained in a feed gas to sulphur trioxide, comprising the steps of a) alternatingly providing a first feed gas containing a high concentration of sulphur dioxide and a second feed gas containing a low concentration of sulphur dioxide as a process gas, b) preheating the process gas by heat exchange with a heat exchange medium, c) reacting the process gas in the presence of a catalytically active material in a catalytic reaction zone, d) converting at least in part the sulphur dioxide of the process gas into sulphur trioxide contained in a product gas in the catalytic reaction zone, e) cooling the product gas by contact with a heat exchange medium, wherein a thermal buffer zone is provided in relation to one of said process steps, providing thermal energy produced during super-autothermal operation for heating the process gas during sub-autothermal operation.
    Type: Application
    Filed: May 13, 2011
    Publication date: March 7, 2013
    Applicant: HALDOR TOPSOE A/S
    Inventors: Martin Møllerhøj, Mads Lykke, Morten Thellefsen, Peter Schoubye