Patents by Inventor William L. Rueter

William L. Rueter 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).

  • Patent number: 6284934
    Abstract: Disclosed is a method of separating the meta isomer of a haloalkylbenzene having the general formula from a mixture with at least one other isomer, where X is Cl or Br and R is alkyl from C2 to C12 or cycloalkyl from C3 to C8. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst is added to the mixture and the mixture is exposed to a brominating agent which preferentially brominates the meta isomer. The mixture is then heated at a temperature above the boiling point of the other isomers but below the boiling point of the brominated meta isomer.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: September 4, 2001
    Assignee: Occidental Chemical Corporation
    Inventors: Michael J. Fifolt, William S. Derwin, Viesturs Lesins, Arthur H. Morth, Frank P. Bermel, David Y. Tang, Mark E. Lindrose, William L. Rueter
  • Patent number: 6156945
    Abstract: Disclosed is a method of making high purity 2,4- and 3,4-dichlorotoluene from parachlorotoluene that contains some metachlorotoluene. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst and about 0.5 to about 10 equivalents of a brominating agent are added to the parachlorotoluene. The metachlorotoluene is brominated, but most of the parachlorotoluene is not brominated. Without separating the brominated products from the unbrominated products, about 0.5 to about 1.5 equivalents of a chlorinating agent are added, whereby only the unbrominated products (i.e., the parachlorotoluene) are chlorinated. The resulting 2,4-dichlorotoluene and 3,4-dichlorotoluene can be separated by distillation.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: December 5, 2000
    Assignee: Occidental Chemical Corporation
    Inventors: Viesturs Lesins, Arthur H. Morth, Frank P. Bermel, David Y. Tang, Mark E. Lindrose, William L. Rueter, Dean R. Lagerwall, Pravin M. Khandare, Hang-Chang Bobby Chen, Mark F. Lechner
  • Patent number: 6130361
    Abstract: Disclosed is a method of separating the meta isomer of a halotoluene having the general formula ##STR1## from a mixture with at least one other isomer, where X is Cl or Br. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst is added to the mixture and the mixture is exposed to a brominating agent which preferentially brominates the meta isomer. The mixture is then heated at a temperature above the boiling point of the other isomers but below the boiling point of the brominated meta isomer.
    Type: Grant
    Filed: November 17, 1998
    Date of Patent: October 10, 2000
    Assignee: Occidental Chemical Corporation
    Inventors: Viesturs Lesins, David Y. Tang, Arthur H. Morth, Mark E. Lindrose, William L. Rueter, Frank Bermel