Patents by Inventor Michael Keane, Jr.

Michael Keane, Jr. 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).

  • Production of dihalomethanes containing fluorine and azeotropes of dihalomethanes containing chlorine with HF
    Patent number: 6274781
    Abstract: A process for producing difluoromethane is disclosed which includes the step of contacting a gaseous mixture containing CH2Cl2 and hydrogen fluoride with a catalyst containing a catalytically effective amount of trivalent chromium supported on a carbon having an ash content of less than 0.5 percent by weight, at a temperature of from about 180 ° C. to about 375° C. The catalyst and temperature conditions of this process allow the concurrent reaction CCl3CF3 with HF to form CCl2FCF3. CH2ClF and unreacted CH2Cl2, each of which may be recovered as an azeotrope with HF, may be recycled.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: August 14, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul S. Furmanek, David A. Glasscock, Michael Keane, Jr., Barry A. Mahler, V. N. Mallikarjuna Rao
  • Production of dihalomethanes containing fluorine and azeotropes of dihalomethanes containing chlorine with HF
    Patent number: 5955637
    Abstract: A process for producing difluoromethane is disclosed which includes the step of contacting a gaseous mixture containing CH.sub.2 Cl.sub.2 and hydrogen fluoride with a catalyst containing a catalytically effective amount of trivalent chromium supported on a carbon having an ash content of less than 0.5 percent by weight, at a temperature of from about 180.degree. C. to about 375.degree. C. The catalyst and temperature conditions of this process allow the concurrent reaction CCl.sub.3 CF.sub.3 with HF to form CCl.sub.2 FCF.sub.3. CH.sub.2 ClF and unreacted CH.sub.2 Cl.sub.2, each of which may be recovered as an azeotrope with HF, may be recycled.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: September 21, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul S. Furmanek, David A. Glasscock, Michael Keane, Jr.
  • Zeolite Rho as catalyst for conversion of methanol and ammonia to dimethylamine
    Patent number: 4806689
    Abstract: A process is provided for producing dimethylamine, comprising reacting methanol and/or dimethylether and ammonia, in amounts sufficient to provide a carbon/nitrogen (C/N) ratio of from about 0.2 to about 1.5, at a temperature from about 250.degree. C. to about 450.degree. C., in the presence of a catalytic amount of an acidic zeolite rho.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: February 21, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thurman E. Gier, Robert D. Shannon, George C. Sonnichsen, David R. Corbin, Michael Keane, Jr.