Patents by Inventor Evert C. Klein

Evert C. Klein 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).

  • Vaporisation in oxidation to phthalic anhydride
    Patent number: 9156018
    Abstract: In the production of phthalic anhydride by the oxidation of ortho-xylene with air, the ortho-xylene loading is increased without increasing the likelihood of explosion by insulating the system to avoid cold spots to keep the ortho-xylene at a temperature above its dew point; in addition the system may be electrically interconnected and grounded to reduce the risk of spark initiated explosions or deflagrations.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: October 13, 2015
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Nicolaas A. de Munck, Aad G. Oskam, Evert C. Klein
  • Mixing in oxidation to phthalic anhydride
    Patent number: 8968671
    Abstract: A system for mixing ortho-xylene with an oxygen-containing gas such as air comprises an evaporator vessel fed with the gas and having a lance projecting into the gas. The lance is provided with a metal spray nozzle for injecting droplets of hot liquid ortho-xylene into the gas stream, concurrently with the direction of flow of the gas. The metal at the surface of the spray nozzle, that in use is in contact with the liquid ortho-xylene, has a high surface hardness to resist erosion, particularly by cavitation. The system is useful in the production of phthalic anhydride by the oxidation of ortho-xylene with air, whereby the risk for deflagrations is reduced. A soft metal seal is the preferred gasket between the spray nozzle and the lance.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: March 3, 2015
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Nicolaas Anthony De Munck, Aad Gerrit Oskam, Johnny Jozef Houben, Evert C. Klein
  • Vaporisation in Oxidation to Phthalic Anhydride
    Publication number: 20140134066
    Abstract: In the production of phthalic anhydride by the oxidation of ortho-xylene with air, the ortho-xylene loading is increased without increasing the likelihood of explosion by insulating the system to avoid cold spots to keep the ortho-xylene at a temperature above its dew point; in addition the system may be electrically interconnected and grounded to reduce the risk of spark initiated explosions or deflagrations.
    Type: Application
    Filed: January 21, 2014
    Publication date: May 15, 2014
    Inventors: Nicolaas A. de Munck, Aad G. Oskam, Evert C. Klein
  • Vaporization in oxidation to phthalic anhydride
    Patent number: 8703974
    Abstract: In the production of phthalic anhydride by the oxidation of ortho-xylene with air, the ortho-xylene loading is increased without increasing the likelihood of explosion by insulating the system to avoid cold spots to keep the ortho-xylene at a temperature above its dew point; in addition the system may be electrically interconnected and grounded to reduce the risk of spark initiated explosions or deflagrations.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: April 22, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Nicolaas Anthony De Munck, Aad Gerrit Oskam, Evert C. Klein
  • Improved Mixing In Oxidation To Phthalic Anhydride
    Publication number: 20110196159
    Abstract: A system for mixing ortho-xylene with an oxygen-containing gas such as air comprises an evaporator vessel fed with the gas and having a lance projecting into the gas. The lance is provided with a metal spray nozzle for injecting droplets of hot liquid ortho-xylene into the gas stream, concurrently with the direction of flow of the gas. The metal at the surface of the spray nozzle, that in use is in contact with the liquid ortho-xylene, has a high surface hardness to resist erosion, particularly by cavitation. The system is useful in the production of phthalic anhydride by the oxidation of ortho-xylene with air, whereby the risk for deflagrations is reduced. A soft metal seal is the preferred gasket between the spray nozzle and the lance.
    Type: Application
    Filed: September 9, 2008
    Publication date: August 11, 2011
    Inventors: Nicolaas Anthony De Munck, Aad Gerrit Oskam, Johnny Jozef Houben, Evert C. Klein