Patents by Inventor Guido Rampart

Guido Rampart 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).

  • Purification of .epsilon.-caprolactam
    Patent number: 4170592
    Abstract: A process for the purification of a solution of .epsilon.-caprolactam in benzene, toluene or xylene by washing with a liquid, wherein the washing liquid is a solution of .epsilon.-caprolactam in water in a weight ratio of from 15 : 1 to 1 : 3, which is used in a quantity of from 5 to 20% by weight, based on the solution of caprolactam in benzene, toluene or xylene, and wherein there are several washing stages so that the equilibrium between the two solutions can be readjusted.
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: October 9, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harry Danziger, Bernd-Ulrich Kaiser, Guido Rampart, Jurgen Schroter
  • Purification of caprolactam
    Patent number: 4148792
    Abstract: A process for the purification of .epsilon.-caprolactam, wherein .epsilon.-caprolactam is treated with potassium permanganate in the presence of from 0.01 to 5% by weight of water, based on caprolactam, and subsequently crystallized from toluene, benzene, ethylbenzene or xylene.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: April 10, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harry Danziger, Otto Immel, Bernd-Ulrich Kaiser, Guido Rampart, Hans-Helmut Schwarz