Patents by Inventor Walter C. Reed

Walter C. Reed 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 monosulfonation of aromatic phosphines, and zwitterionic product derived therefrom
    Patent number: 7754924
    Abstract: A method of preparing an aromatic phosphine monosulfonate in zwitterionic form, such as dicyclohexylphenylphosphine monosulfonate zwitterion, involving contacting an aromatic phosphine with a sulfonating agent to provide a reaction mixture containing aromatic phosphine monosulfonate in acid form and unconverted sulfonating agent; quenching or removing substantially all of the unconverted sulfonating agent; partially neutralizing the aromatic phosphine monosulfonate in acid form to phase separate aromatic phosphine monosulfonate in zwitterionic form as a solid or neat liquid layer; and collecting the zwitterion as a solid or neat liquid. The zwitterion may be neutralized to form the corresponding aromatic phosphine monosulfonate metal salt, which is useful in preparing catalysts for hydroformylation processes.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: July 13, 2010
    Assignee: Dow Global Technologies Inc.
    Inventors: Donald L. Morrison, Kurt D. Olson, Walter C. Reed, Anthony G. Abatjoglou
  • Process for the Monosulfonation of Aromatic Phosphines, and Zwitterionic Product Derived Therefrom
    Publication number: 20080221363
    Abstract: A method of preparing an aromatic phosphine monosulfonate in zwitterionic form, such as dicyclohexylphenylphosphine monosulfonate zwitterion, involving contacting an aromatic phosphine with a sulfonating agent to provide a reaction mixture containing aromatic phosphine monosulfonate in acid form and unconverted sulfonating agent; quenching or removing substantially all of the unconverted sulfonating agent; partially neutralizing the aromatic phosphine monosulfonate in acid form to phase separate aromatic phosphine monosulfonate in zwitterionic form as a solid or neat liquid layer; and collecting the zwitterion as a solid or neat liquid. The zwitterion may be neutralized to form the corresponding aromatic phosphine monosulfonate metal salt, which is useful in preparing catalysts for hydroformylation processes.
    Type: Application
    Filed: September 14, 2006
    Publication date: September 11, 2008
    Applicant: Dow Global Technologies Inc.
    Inventors: Donald L. Morrison, Kurt D. Olson, Walter C. Reed, Anthony G. Abatjoglou