Patents by Inventor Fuming Mei

Fuming Mei 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).

  • Process for the preparation of urethanes
    Patent number: 9475762
    Abstract: Urethanes are prepared by oxidative carbonylation of at least one amino compound in the presence of carbon monoxide, oxygen and organic, at least one hydroxyl-group-carrying compound. The carbonylation is carried out in the absence of halogen-containing promoters. The carbonylation is also carried out in the presence of a metal complex catalyst which contains neutral bidentate N-chelate ligands of the (N˜N) type, two monoanionic N,O-chelate ligands of the general type (N˜O)? or tetradentate dianionic chelate ligands (O˜N˜N˜O)2?.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: October 25, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Jacob, Stefan Wershofen, Stephan Klein, Jorg Sundermeyer, Fuming Mei
  • PROCESS FOR THE PREPARATION OF URETHANES
    Publication number: 20160152559
    Abstract: Urethanes are prepared by oxidative carbonylation of at least one amino compound in the presence of carbon monoxide, oxygen and organic, at least one hydroxyl-group-carrying compound. The carbonylation is carried out in the absence of halogen-containing promoters. The carbonylation is also carried out in the presence of a metal complex catalyst which contains neutral bidentate N-chelate ligands of the (N˜N) type, two monoanionic N,O-chelate ligands of the general type (N˜O)? or tetradentate dianionic chelate ligands (O˜N˜N˜O)2?.
    Type: Application
    Filed: February 4, 2016
    Publication date: June 2, 2016
    Inventors: Andreas Jacob, Stefan Wershofen, Stephan Klein, Jorg Sundermeyer, Fuming Mei
  • Process for the preparation of urethanes
    Patent number: 9284267
    Abstract: Urethanes are prepared by oxidative carbonylation of at least one amino compound in the presence of carbon monoxide, oxygen and organic, at least one hydroxyl-group-carrying compound. The carbonylation is carried out in the absence of halogen-containing promoters. The carbonylation is also carried out in the presence of a metal complex catalyst which contains neutral bidentate N-chelate ligands of the (N˜N) type, two monoanionic N,O-chelate ligands of the general type (N˜O)? or tetradentate dianionic chelate ligands (O˜N˜N˜O)2?.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: March 15, 2016
    Assignee: Bayer MaterialScience AG
    Inventors: Andreas Jacob, Stefan Wershofen, Stephan Klein, Jörg Sundermeyer, Fuming Mei
  • Production of N-aryl carbamates and N-aryl isocyanates
    Patent number: 8076500
    Abstract: A method for the production of N-aryl carbamates (urethanes) and N-aryl isocyanates is described in which aromatic nitro compounds are subjected to a reductive carbonylation in the presence of carbon monoxide and organic compounds carrying hydroxyl groups, wherein the carbonylation is carried out in the presence of metal complex catalysts, for which anionic N,O chelate ligands of the general type [M(N˜O)?2] and [M(O˜N˜N˜O)2?] containing a bi- or trivalent transition metal of the groups 5 to 11 are used.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: December 13, 2011
    Assignee: Philipps-Universitaet Marburg
    Inventors: Joerg Sundermeyer, Fuming Mei
  • Production of N-aryl Carbamates and N-aryl Isocyanates
    Publication number: 20100217029
    Abstract: The invention relates to a method for producing N-aryl carbamates (urethanes) and N-aryl isocyanates. According to said method, aromatic nitro compounds are subjected to a reductive carbonylation in the presence of carbon dioxide and organic compounds that bear hydroxyl groups and the carbonylation is carried out in the presence of metal complexing catalysts. Anionic N,O-chelate ligands of the general formulae [M(N˜O)?2] and [M(O˜N˜N˜O)2?], containing a divalent or trivalent transition metal of groups 5-11 are used for the catalysts.
    Type: Application
    Filed: June 9, 2006
    Publication date: August 26, 2010
    Inventors: Jörg Sundermeyer, Fuming Mei
  • Process for the preparation of urethanes
    Publication number: 20090275771
    Abstract: Urethanes are prepared by oxidative carbonylation of at least one amino compound in the presence of carbon monoxide, oxygen and organic, at least one hydroxyl-group-carrying compound. The carbonylation is carried out in the absence of halogen-containing promoters. The carbonylation is also carried out in the presence of a metal complex catalyst which contains neutral bidentate N-chelate ligands of the (N˜N) type, two monoanionic N,O-chelate ligands of the general type (N˜O)? or tetradentate dianionic chelate ligands (O˜N˜N˜O)2?.
    Type: Application
    Filed: January 28, 2009
    Publication date: November 5, 2009
    Inventors: Andreas Jacob, Stefan Wershofen, Stephan Klein, Jorg Sundermeyer, Fuming Mei