Patents by Inventor Joachim Schelchshorn

Joachim Schelchshorn 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 restoring or maintaining the activity of heterogeneous catalysts for reactions at normal and low pressures
    Patent number: 4721826
    Abstract: By the process of the present invention the activity of heterogeneous catalysts for reactions at normal and low pressures is restored or maintained. These catalysts can lose their activity as a result of the deposition, physisorption or chemisorption of organic or inorganic deactivating substances which are carried over into the reaction system or are formed as the result of side reactions in a chemical synthesis carried out with the aid of the catalyst. The activity is restored or maintained by using a pressure greater than the critical pressure of the fluid phase and a temperature higher than or equal to the critical temperature of the fluid phase. In this process, the pressure and temperature are applied for a period such that the deactivating substances are either removed from the catalyst or are not initially deposited thereon or absorbed or formed.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: January 26, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Tiltscher, Helmut Wolf, Joachim Schelchshorn, Kurt Dialer
  • Process for restoring or maintaining the activity of heterogeneous catalysts for reactions at normal and low pressures
    Patent number: 4605811
    Abstract: By the process of the present invention the activity of heterogeneous catalysts for reactions at normal and low pressures is restored or maintained. These catalysts can lose their activity as a result of the deposition, physisorption or chemisorption of organic or inorganic deactivating substances which are carried over into the reaction system or are formed as the result of side reactions in a chemical synthesis carried out with the aid of the catalyst. The activity is restored or maintained by using a pressure greater than the critical pressure of the fluid phase and a temperature higher than or equal to the critical temperature of the fluid phase. In this process, the pressure and temperature are applied for a period such that the deactivating substances are either removed from the catalyst or are not initially deposited thereon or absorbed or formed.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: August 12, 1986
    Inventors: Helmut Tiltscher, Helmut Wolf, Joachim Schelchshorn, Kurt Dialer