Patents by Inventor Juhani Paloniemi

Juhani Paloniemi 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).

  • Regeneration of a working solution in a hydrogen peroxide production process
    Patent number: 6946061
    Abstract: The invention relates to a method of regenerating hydrogenated and/or oxygenated alkyl anthraquinones and/or alkyl anthrahydroquinones to alkyl anthraquinones and/or alkyl anthrahydroquinones, wherein the reaction is carried out in the presence of a catalyst under electromagnetic irradiation.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: September 20, 2005
    Assignee: Kemira Oyj
    Inventors: Reijo Aksela, Juhani Paloniemi
  • Hydrogenation of a working solution in a hydrogen peroxide production process
    Patent number: 6749727
    Abstract: A method of hydrogenating alkyl anthraquinones and/or alkyl hydroanthraquinones to alkyl anthrahydroquinones and/or alkyl hydroanthrahydroquinones is disclosed. The reaction is carried out in the presence of a catalyst under electromagnetic irradiation, such as microwave irradiation. The invention further relates to a method of hydrogenating a working solution in a hydrogen peroxide production process, wherein the working solution contains alkyl anthraquinones and/or alkyl hydroanthraquinones dissolved in at least one solvent to convert the quinines to the corresponding alkyl anthrahydroquinones and/or alkyl hydroanthrahydroquinones, where the reaction is carried out in the presence of a catalyst under electromagnetic irradiation such as microwave irradiation.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: June 15, 2004
    Assignee: Kemira Chemicals Oy
    Inventors: Reijo Aksela, Juhani Paloniemi
  • Regeneration of a working solution in a hydrogen peroxide production process
    Publication number: 20030181741
    Abstract: The invention relates to a method of regenerating hydrogenated and/or oxygenated alkyl anthraquinones and/or alkyl anthrahydroquinones to alkyl anthraquinones and/or alkyl anthrahydroquinones, wherein the reaction is carried out in the presence of a catalyst under electromagnetic irradiation.
    Type: Application
    Filed: January 22, 2003
    Publication date: September 25, 2003
    Inventors: Reijo Aksela, Juhani Paloniemi
  • Hydrogenation of a working solution in a hydrogen peroxide production process
    Publication number: 20020193615
    Abstract: The invention relates to a method of hydrogenating alkyl anthraquinones and/or alkyl hydroanthraquinones to alkyl anthrahydroquinones and/or alkyl hydroanthrahydroquinones, wherein the reaction is carried out in the presence of a catalyst under electromagnetic irradiation. Additionally the invention relates to a method of hydrogenating a working solution in a hydrogen peroxide production process, said working solution containing alkyl anthraquinones and/or alkyl hydroanthraquinones dissolved in at least one solvent, to convert said quinones to corresponding alkyl anthrahydroquinones and/or alkyl hydroanthrahydroquinones, wherein the reaction is carried out in the presence of a catalyst under electromagnetic irradiation.
    Type: Application
    Filed: March 14, 2002
    Publication date: December 19, 2002
    Inventors: Reijo Aksela, Juhani Paloniemi